AD/CON/88 - Kelly Aerospace Turbochargers

The AD is structured around a small set of operational concepts: applicability by engine model and serial number, mandatory replacement as the corrective action, immediate compliance timing ("before further flight") for affected turbines installed on or after 20 March 2007, and referral to manufacturer and STC documentation to identify affected parts and procedures.

Applicability. The instrument limits its scope to specified TCM engine models fitted with a particular Kelly Aerospace turbocharger P/N 646677, and to IO-550-N engines modified under Engine Technologies STC SE10589SC that have turbocharger P/N 466304-0003. It further restricts action to turbochargers with serial numbers that appear on Kelly Aerospace Service Bulletin No. 026 (Revision B) or No. 027, as appropriate. The AD explicitly exempts turbochargers installed before 20 March 2007 from mandatory replacement (Applicability: "For any turbocharger that was installed before 20 March 2007, no further action is required").

Serial-number gating. Rather than requiring blanket removal or an inspection of all units by part number alone, the AD ties the replacement obligation to specific serial numbers listed in the Kelly Aerospace SBs. The AD directs operators to those SBs for the list of affected serial numbers (Applicability). That makes the SBs an operationally central document: compliance is determined by cross-referencing installations against the SB SN lists.

Corrective action. The only corrective action stated in the AD is replacement of the turbocharger where the SN and installation date criteria are met. The Requirement section sets two distinct replacement requirements: one for engines modified to Engine Technologies STC SE10589SC and one for TCM engines with turbocharger TCM P/N 646677 (Requirement). Additional guidance is available via Teledyne Continental MSB07-4 and Cirrus Service Advisory SA 07-14 R1, which the AD notes contain "additional information" on replacing turbochargers in the specified installations (Requirement, Note 3).

Timing. The compliance timing is immediate operationally for affected units: replacement is required "before further flight" for turbochargers installed on or after 20 March 2007 when their SN appears in the relevant SB, and the AD becomes effective on 30 August 2007 (Compliance).

Safety rationale and failure mode. The AD identifies a concrete failure mechanism: turbine rotor separation from the shaft due to a machining defect in the turbocharger compressor. The AD links this defect to four reported incidents and sets out the possible operational outcomes, including "full engine power loss, loss of engine lubricant, or smoke in the aeroplane cabin" (Background). The AD uses that safety incident record to justify immediate mandatory replacement where the SN and installation-date criteria are met.

Document cross-references. The AD incorporates or references several external documents as part of its operational picture: Kelly Aerospace Service Bulletins No. 026 (Revision B) and No. 027 for SN identification (Applicability); Teledyne Continental MSB07-4 and Cirrus Service Advisory SA 07-14 R1 for additional replacement information (Requirement, Note 3); and it explicitly refers to FAA AD 2007-16-10 Amdt 39-15149 dated 1 August 2007 (Requirement, Note 4). These cross-references function as essential technical and regulatory inputs to determine affected parts and acceptable replacement pathways.

Boundaries of obligation. The AD does not set out inspection options, a mandatory reporting procedure in the text, or alternative corrective actions such as inspection or life-limits. The singular required remedy is turbocharger replacement for affected units. The AD also specifies that turbochargers installed prior to 20 March 2007 are not subject to the replacement requirement.

Administrative and temporal context. The AD includes an explicit effective date and signature by a CASA delegate, documenting its issuance and immediate legal effect. The combination of serial-number specificity, immediate timing and cross-referencing to SBs and MSBs makes owner/operator action focused and time-sensitive.

The AD explicitly affects owners and operators of aircraft equipped with the listed Teledyne Continental Motors engine types where a Kelly Aerospace Power Systems turbocharger with certain serial numbers is installed on or after 20 March 2007. The document lists specific engine models and airframe examples to illustrate the common installations of the affected turbochargers (Applicability). Named examples include Adam Aircraft A500, Columbia Aircraft Manufacturing LC41-550FG, Mooney Aeroplane Company M20TN (Acclaim), and Piper Aircraft Incorporated PA-46-310P (Malibu), where the TCM engines are installed. The AD also identifies Cirrus Design Corporation Aircraft Model SR22 modified to Engine Technologies STC SA10588SC as an example for engines modified to install the STC turbocharger P/N 466304-0003 (Applicability; Note 2).

Primary operationally affected parties. The immediate operational obligation falls on the aircraft operator, maintenance organisation or owner responsible for airworthiness and continuing airworthiness of the affected aeroplane. The AD requires replacement "before further flight" in specified circumstances; that requirement places a direct duty on the operator or maintainer to ground and effect replacement prior to conducting any subsequent flights with the affected turbocharger installed. The AD itself does not spell out who pays for parts or labour; however, the scope of the requirement , a mandated replacement before further flight , imposes an immediate logistical and financial burden on the party that provides airworthiness compliance, typically the aircraft owner or operator.

Maintenance organisations and maintenance planners. Organisations that perform maintenance or that hold maintenance arrangements for affected aircraft will be operationally involved. They must consult Kelly Aerospace SB No. 026 (Revision B) and SB No. 027 to identify affected SNs, schedule removal and replacement, source replacement turbochargers, and perform whatever additional procedures those referenced SBs, Teledyne MSB07-4 or Cirrus Service Advisory SA 07-14 R1 describe. The AD cites those documents as sources of "additional information" on replacement (Requirement, Note 3), which implies that maintenance organisations will need to follow that material to complete the work.

Supplemental type certificate holders and modifiers. Engine Technologies Incorporated holds the STC SE10589SC referred to in the AD and STC SA10588SC is mentioned in the context of Cirrus SR22 modifications. The AD specifically includes engines modified by these STCs when certain turbocharger SNs are installed, so STC holders, installers and operators of STC-modified aircraft are within the affected group (Applicability, Note 1 and Note 2).

Aircraft manufacturers and component suppliers. The AD references manufacturer and supplier service bulletins and advisories (Kelly Aerospace SBs, Teledyne Continental MSB07-4, Cirrus SA 07-14 R1). Those suppliers and manufacturers will be involved in identification of serial numbers, supply of replacement units and provision of technical instructions. The AD's reliance on the SBs to determine serial-number applicability places evidentiary importance on those supplier documents.

Regulators and delegated personnel. The AD was issued by the Civil Aviation Safety Authority and signed by a CASA delegate. Regulators are the issuing authority and will be the body that enforces or expects compliance under the relevant aviation safety regulatory regime. The AD itself does not list enforcement actions or penalties; it sets the mandatory action and effective date (Background; Compliance).

Excluded or unaffected parties. The AD explicitly excludes turbochargers installed before 20 March 2007 from the replacement obligation (Applicability). Owners and operators with installations not matching the listed engine models, P/Ns and serial numbers are not subject to the specific replacement mandate contained in this AD.

In short, the AD operationally affects operators and maintenance organisations responsible for aircraft with the listed TCM engines when a Kelly turbocharger with the identified serial numbers was installed on or after 20 March 2007, plus STC-modified installations where the STC turbocharger P/N and listed serial numbers are present. The burden of action and the timing placed on those parties are explicit in the Compliance and Requirement entries.

Duties imposed by the AD are narrowly specified and immediate. The document creates mandatory duties tied to part numbers, serial numbers and installation dates. The AD does not articulate rights or appeals procedures; it sets the remedial steps and the timing for compliance.

Mandatory replacement duty. The central duty is replacement of the affected turbocharger. The Requirement section sets two parallel obligations: (1) for engines modified to Engine Technologies STC SE10589SC, replace the turbocharger; and (2) for TCM engines with turbocharger TCM P/N 646677, replace the turbocharger. The AD does not list alternative acceptable measures such as inspection or operational limitations. The AD therefore creates a strict duty to replace affected units rather than to monitor them (Requirement).

Determination duty using service bulletins. Operators are required to determine whether their turbocharger is affected by consulting Kelly Aerospace Service Bulletins No. 026 (Revision B) and No. 027 to see if the turbocharger serial number is listed (Applicability). That is a factual determination step that the operator or maintainer must undertake before taking the replacement action. The AD makes the SBs operationally integral to compliance.

Timing duty. Compliance is time-critical. The AD requires replacement "before further flight" for affected turbochargers installed on or after 20 March 2007 and with SNs listed in the SBs (Compliance). This language imposes an immediate operational constraint: affected aircraft cannot be flown until the replacement is completed.

Documentation and procedural duties implied. While the AD does not expressly require record-keeping or reporting in its text, the need to consult and rely on the SBs, MSB07-4 and Cirrus Service Advisory suggests practical duties: sourcing the SBs, confirming serial numbers, scheduling replacement, and following the referenced technical instructions. The AD points operators to Teledyne Continental MSB07-4 and Cirrus Service Advisory SA 07-14 R1 for "additional information" on replacement procedures, implying that the duties include following those technical instructions when applicable (Requirement, Note 3).

Duty boundaries set by installation date. The AD limits the duty to turbochargers installed on or after 20 March 2007; it explicitly states that turbochargers installed before that date require no further action (Applicability). That temporal boundary changes the duty calculus for owners whose installations predate 20 March 2007.

No rights or discretion stated in the AD. The AD text does not afford operators an explicit right to defer, appeal or use an alternative corrective action within the document. It does not provide a process for requesting an alternative means of compliance or a compliance extension. The AD likewise does not specify compensation, cost-sharing, or replacement supply assurances. Any such rights or discretions would have to exist under other regulatory instruments or be sought from CASA outside the AD text; the AD itself does not enumerate them.

References to additional guidance. Although the AD mandates replacement, it points to other documents for further technical guidance: Kelly SB No. 026 Rev B and SB No. 027 for SN identification, and Teledyne MSB07-4 and Cirrus Service Advisory SA 07-14 R1 for replacement information (Requirement, Notes). Those references likely contain technical steps, but the AD itself converts the action identified therein into a mandatory duty for affected installations.

Operational implication of "before further flight". By demanding replacement before further flight, the AD effectively requires immediate grounding of any affected aircraft until replacement occurs. That operational duty rests with the operator or owner responsible for the aircraft’s continued airworthiness.

Summary. The AD imposes a clear and immediate duty to identify whether a turbocharger SN appears on certain SB lists and, if so and if the turbocharger was installed on or after 20 March 2007, to replace the turbocharger before further flight. The AD does not set out rights, appeals processes, or alternative compliance measures within its text.

The AD text does not specify penalties, fines, or enforcement procedures. It sets the mandatory technical requirement and the compliance timing but does not, within this document, define the sanctions for non-compliance nor describe enforcement mechanisms. The AD does establish the Civil Aviation Safety Authority as the issuing body by signature of a CASA delegate and an effective date (Background; signature block). That establishes the regulatory provenance and the expectation that the AD is binding within the relevant aviation safety regulatory framework, but the AD itself does not detail enforcement steps or civil or criminal penalties.

Implication of immediate mandatory action. The AD requires replacement "before further flight" for affected turbochargers installed on or after 20 March 2007 and with SNs listed in the referenced Kelly SBs (Compliance). The practical enforcement implication is that an aircraft operator who does not comply would be operating an aircraft in a configuration that the AD has identified as unsafe, and which the issuing authority has required to be corrected prior to flight. While the AD does not spell out enforcement measures, the "before further flight" requirement places operators in a position where flying without performing the mandated replacement would be inconsistent with the AD’s mandatory terms.

Absence of enforcement detail in the AD. Because the AD does not set out penalties, readers should not infer from the AD text alone what regulatory sanctions, administrative actions, or legal consequences would follow non-compliance. Any civil, administrative or criminal penalties would derive from other statutes, regulations or enforcement policies under CASA or other competent authorities. The AD does reference FAA AD 2007-16-10 (Requirement, Note 4), but that reference is to a related foreign regulator’s AD and does not, in itself, define enforcement in the Australian context.

Operational consequences. The AD forces an operational decision point: affected aircraft should not be flown until the replacement is done. In practice, regulators monitor compliance with ADs and continued airworthiness requirements, and non-compliance typically becomes an enforcement matter under broader aviation safety laws. The AD itself, however, contains no explicit enforcement or penalty clause.

Record of issuance and effective date. The AD documents issuance by CASA, including the effective date of 30 August 2007. That establishes the date from which the compliance timing runs and provides an administrative basis for compliance enquiries and any subsequent enforcement action taken by the regulator under its general powers. The AD’s signature by the CASA delegate (dated 27 August 2007) is the formal attestation of the directive’s adoption.

In summary, AD/CON/88 sets mandatory technical and timing obligations but leaves enforcement mechanisms and penalties unspecified in the text. Operators and maintenance organisations should treat the AD as immediately binding in practice and be aware that non-compliance will likely engage whatever enforcement regime CASA applies to breaches of airworthiness directives and continuing airworthiness obligations.

The AD itself is an instrument of the Civil Aviation Safety Authority and therefore operates within the broader Australian civil aviation regulatory framework. The AD text, however, does not detail how it legally interacts with statutes or other instruments beyond referencing other technical and regulatory documents. The AD explicitly references external technical guidance and a related foreign regulator AD, which indicates cross-jurisdictional and supplier-document interactions that operators must consider.

References to manufacturer and STC documentation. The AD directs operators to Kelly Aerospace Service Bulletins No. 026 (Revision B) and No. 027 to determine whether a turbocharger serial number is affected (Applicability). It additionally points to Teledyne Continental MSB07-4 and Cirrus Service Advisory SA 07-14 R1 for additional information regarding turbocharger replacement for TCM engines and the Cirrus SR22 modification respectively (Requirement, Note 3). These technical documents operate functionally alongside the AD: the SBs identify affected serial numbers, while the MSB and service advisory provide procedural guidance. The AD therefore integrates supplier and manufacturer documentation into its compliance architecture by reference.

Interaction with STC approvals. The AD explicitly addresses engines modified under Supplemental Type Certificates. It names Engine Technologies Incorporated STC SE10589SC (Applicability, Note 1) and STC SA10588SC as relevant to Cirrus SR22 aircraft (Applicability, Note 2). That means compliance for STC-modified aircraft must consider both the STC installation basis and the AD requirements. The AD does not alter the STC itself; instead, it applies to aircraft where the STC-installed turbocharger with certain SNs is present.

Cross-reference to FAA AD. The AD refers to FAA AD 2007-16-10 Amdt 39-15149 dated 1 August 2007 (Requirement, Note 4). This shows awareness of parallel action by another regulator and indicates that the issue has been addressed in multiple jurisdictions. The AD’s reference to that FAA AD is a technical and regulatory cross-reference, not an incorporation by direct legal text, but it signals that operators who participate in international operations or maintain equipment consistent with FAA directives will need to reconcile both directives.

Scope vis-a-vis other Australian regulatory instruments. The AD sets mandatory remedial action for airworthiness and references technical bulletins and advisories. It does not, in its text, specify how it interacts with other Australian legislation such as the Civil Aviation Act, regulations on maintenance organisation approvals, or air operator certificate obligations. However, by being an AD issued by CASA and signed by a delegate, it functions within that broader statutory and regulatory regime and is part of the continuing airworthiness obligations that operators and maintainers must meet. The AD does not itself amend or revoke other instruments.

No incorporation of enforcement or appeal mechanisms. The AD does not specify appeal routes, alternative compliance procedures or exemptions within its text. Any such mechanisms would be governed by other regulatory provisions or administrative processes under CASA, which the AD does not set out.

Supply chain and warranty interactions. The AD requires replacement and points to service bulletins and manufacturer MSBs. It does not address contractual relationships, warranties, or commercial liabilities between operators and suppliers. Those legal relationships remain governed by contract law, warranty terms and any separate regulatory arrangements; any interaction with the AD would be practical (for example, the supplier’s capacity to provide replacement units) rather than legal within the text.

Practical interaction summary. Operators must coordinate between this AD and the referenced SBs, MSB and service advisory to determine affected serial numbers and the replacement procedure. Where aircraft operate internationally or were maintained under FAA oversight, operators will also need to consider FAA AD 2007-16-10. The AD does not itself describe broader legal interactions, appeal or enforcement mechanisms, nor does it modify STCs or service bulletins; it converts the identified technical issue into a domestic mandatory airworthiness requirement with explicit timing.

The AD text as supplied does not include a history of prior amendments or later revisions. It is presented as AD/CON/88, dated 27 August 2007, with an effective date of 30 August 2007. The document lists references to specific dated Service Bulletins and advisories used to determine applicability, namely Kelly Aerospace SB No. 026, Revision B, dated 27 July 2007, and SB No. 027, dated 25 July 2007 (Applicability). It also refers to Teledyne Continental Aircraft Engine Mandatory Service Bulletin MSB07-4, dated 30 July 2007, and Cirrus Service Advisory SA 07-14 R1, dated 24 July 2007, for additional information (Requirement, Note 3). The AD additionally notes FAA AD 2007-16-10 Amdt 39-15149 dated 1 August 2007 (Requirement, Note 4).

No amendments recorded in the document. The AD does not show any later amendments to its text, nor does it include an amendment log or references to re-issues or superseding ADs. The absence of amendment entries in the supplied text means that, as provided, AD/CON/88 is the instrument in its original form dated 27 August 2007 with the effective date of 30 August 2007.

Service bulletin revision signalled. The AD relies on Kelly Aerospace SB No. 026 Revision B to determine affected serial numbers for turbochargers installed under STC SE10589SC (Applicability). The fact that it references a specific revision of the SB suggests that the SB underwent at least one revision prior to the AD’s issuance. The AD does not, however, document earlier SB revisions, nor does it describe any subsequent changes to the SBs after the dates cited.

Notes and cross-references reflect contemporaneous documents. The AD’s cross-references to MSB07-4 and Cirrus Service Advisory SA 07-14 R1, all dated in July 2007, together with the FAA AD dated 1 August 2007, indicate that the AD was issued in the context of a cluster of safety communications in mid-2007. The AD text does not itself chronicle any amendments to those referenced documents.

Procedural and administrative history not included. The supplied AD does not include a legislative, consultation or administrative history such as draft notices, consultation responses, or the chain of internal approvals within CASA. It also does not reference any prior or subsequent AD numbers as superseding or being superseded.

Implication for users. Users seeking a full amendment history or subsequent revisions will not find any such history within this document and must look elsewhere if they require amendment records beyond the AD as presented. The AD as supplied should be treated as the operative directive with the dates and references included in its text.

The AD text contains no litigation history. It does not cite any court decisions, administrative appeals, or challenges related to its issuance. The document’s content focuses on technical applicability, required replacement actions, compliance timing and the safety rationale. It does reference other regulatory and technical documents, such as Kelly Aerospace service bulletins, Teledyne Continental MSB07-4, Cirrus Service Advisory SA 07-14 R1, and FAA AD 2007-16-10 (Requirement, Note 4), but none of those references in the AD text are associated with litigation or legal proceedings within the supplied material.

What the absence of litigation history in the AD implies. The lack of litigation references in the AD means that the AD text itself does not record any legal challenges, court rulings or judicial interpretation of this directive. It does not provide a procedural history of legal disputes concerning the AD’s validity, scope or enforceability. Users requiring information about any subsequent legal proceedings, seeking judicial interpretation of AD obligations, or wanting to confirm whether the AD has been contested will need to consult court or tribunal records or regulator administrative records outside of this AD document.

Operational consequence for legal practitioners. For lawyers, compliance officers and in-house counsel advising operators, the absence of litigation history in the AD means that legal advice cannot be grounded in judicial interpretation of this AD from the document itself. Any arguments about the scope, enforceability, or potential defences to non-compliance would need to reference general aviation regulatory law, CASA procedures or subsequent case law not contained in this text.

Reference-driven enforcement queries. The AD’s cross-references to external technical and regulatory documents (Kelly SBs, MSB07-4, Cirrus SA 07-14 R1 and FAA AD 2007-16-10) create a technical compliance matrix. Any legal disputes about whether an operator has complied with the AD likely would hinge on factual issues , such as whether a turbocharger SN was indeed listed, whether the turbocharger was installed before or after 20 March 2007, and whether replacement was performed before further flight , rather than on legal interpretations contained in the AD.

Conclusion on litigation history. The AD does not record any litigation history. Absent additional external research, one cannot conclude from this document whether there were subsequent legal challenges to AD/CON/88 or its implementation.

The AD contains several operational details that can catch operators and maintainers if overlooked. These are precise, document-based points rather than policy-level observations.

Serial-number gate and referenced SBs. The AD does not list affected turbocharger serial numbers in its own text. Instead, it requires operators to use Kelly Aerospace Service Bulletin No. 026, Revision B (dated 27 July 2007) and SB No. 027 (dated 25 July 2007) to determine whether a turbocharger SN is affected (Applicability). A practical risk is failing to consult the correct version of the SB or missing the SN list, which could lead to either unnecessary replacement or, conversely, continued operation of an affected turbocharger. The AD makes the SBs essential to determining applicability.

Installation date cutoff. The AD applies only to turbochargers installed on or after 20 March 2007 in the specified engines. It explicitly states that turbochargers installed before that date require no further action (Applicability). A common operational pitfall is misreading installation records and misclassifying an installation date, thereby applying the replacement requirement where it does not apply or missing a required replacement. Accurate maintenance records are therefore critical.

"Before further flight" timing. The compliance requirement is categorical: where affected turbocharger SNs and installation dates match the AD’s criteria, replacement must be done "before further flight" (Compliance). That language leaves no interim relief or staged compliance period. Operators must therefore be prepared to ground aircraft until replacement is completed. Misinterpreting the timing as allowing short-term continued operation pending parts availability would be a compliance error under the AD’s plain terms.

Multiple part numbers and STCs. The AD covers distinct P/Ns and STC scenarios: TCM turbocharger P/N 646677 on specified TCM engines, and turbocharger P/N 466304-0003 on IO-550-N engines modified under Engine Technologies STC SE10589SC (Applicability). Operators who rely on part-number memory without cross-referencing shop paperwork or SB lists risk missing differences between P/Ns and STCs. In particular, Cirrus SR22 aircraft modified to Engine Technologies STC SA10588SC are noted separately (Applicability, Note 2).

Reference to additional documents does not substitute for AD obligations. The AD refers to Teledyne Continental MSB07-4 and Cirrus Service Advisory SA 07-14 R1 for "additional information" about replacement (Requirement, Note 3). Those documents may contain procedural steps, part sources or instructions, but the AD’s replacement requirement is independent: following the MSB or service advisory does not by itself discharge the AD obligation unless the replacement is actually effected.

No alternative compliance or inspection path in the AD. The AD specifies replacement as the required action and does not list inspection, operational limitations, or other mitigations as permitted alternatives. Operators should not assume that a documented inspection or temporary operation constitutes compliance unless authorised elsewhere by CASA; the AD itself sets replacement as the mandatory remedy.

Superseding or related ADs. The AD references FAA AD 2007-16-10 (Requirement, Note 4). Operators must ensure they are reconciling all applicable directives, but should not assume that the FAA reference in the AD replaces or amends the CASA AD obligations. Each regulator’s AD obligations are separate; compliance with one is not necessarily compliance with the other unless the operator documents alignment.

Supply chain and parts availability. The AD requires replacement of turbochargers for affected installations. The AD does not guarantee local stock, priority or supply arrangements. Operators should anticipate lead times for obtaining replacement turbochargers and plan for the operational impact of grounding aircraft until parts and replacement services are available.

Documentation of compliance. Although the AD does not explicitly state a record-keeping requirement, the need to demonstrate that an affected turbocharger was identified and replaced before further flight is inherent in practical compliance. Maintaining clear maintenance entries that cite the AD, the SB used to identify the SN, the replacement part P/N and SN, and the date of work will be essential if any regulatory question arises. Failing to create or retain such records is a potential practical "gotcha".

Partial installations or interim repairs. The AD does not contemplate interim repairs, partial replacement, or modifications short of replacing the turbocharger. Attempting a repair rather than replacement, without explicit acceptance from CASA or another authorised relief mechanism, risks non-compliance with the AD’s unambiguous replacement directive.

In summary, operators and maintainers should pay close attention to the referenced Kelly SBs for SN lists, verify installation dates, be prepared to ground aircraft pending replacement, and document the identification and replacement work thoroughly. The AD leaves little room for staged or alternative compliance measures within its own text.

Follow these step-by-step actions based on the AD text to meet the directive’s requirements. Each step is grounded in the AD’s Applicability, Requirement and Compliance entries.

1. Identify affected aircraft and engines. Review your fleet records to identify aircraft equipped with the TCM engine models listed in the AD: TSIO-520-BE, TSIO-550-A, TSIO-550-B, TSIO-550-C, TSIO-550-E and TSIO-550-G, as well as TCM IO-550-N engines modified under Engine Technologies STC SE10589SC (Applicability). Also note the AD’s example airframes such as Adam A500, Columbia LC41-550FG, Mooney M20TN (Acclaim), Piper PA-46-310P (Malibu) and Cirrus SR22 modified to STC SA10588SC for cross-referencing installations (Applicability, Notes).

2. Obtain the referenced Kelly Aerospace Service Bulletins. Secure Kelly Aerospace SB No. 026, Revision B dated 27 July 2007 and SB No. 027 dated 25 July 2007. The AD requires use of those SBs to determine whether a turbocharger serial number is affected (Applicability). Ensure you have the specific revision referenced by the AD, especially SB No. 026 Revision B.

3. Cross-check turbocharger part numbers and serial numbers. For each identified engine, confirm the turbocharger part number installed. The AD targets turbocharger TCM P/N 646677 for TCM engines and turbocharger P/N 466304-0003 for IO-550-N engines modified under STC SE10589SC (Applicability; Requirement). For each turbocharger, check the SN against the lists in the relevant Kelly SB to determine whether it is listed as affected.

4. Verify installation date. Confirm the installation date of the turbocharger on the airframe or engine. The AD only requires replacement for turbochargers installed on or after 20 March 2007 with SNs listed in the SBs. The AD expressly states no action is required for turbochargers installed before 20 March 2007 (Applicability). Proper maintenance records are therefore essential.

5. If turbocharger is affected, plan replacement immediately. Where the turbocharger SN is on the SB list and the turbocharger was installed on or after 20 March 2007, the AD requires replacement "before further flight" (Compliance). Schedule ground time, source a replacement unit and arrange qualified maintenance to effect the replacement.

6. Follow manufacturer and STC guidance for replacement procedures. The AD points to Teledyne Continental MSB07-4 dated 30 July 2007 and Cirrus Service Advisory SA 07-14 R1 dated 24 July 2007 for "additional information" on replacing turbochargers in the specified installations (Requirement, Note 3). Use these documents to follow the manufacturer- or STC-holder-recommended procedures for removal and installation, torque settings, associated inspections and re-certification tasks, as appropriate.

7. Implement replacement and post-replacement checks. Perform the turbocharger replacement in accordance with the applicable technical instructions. Although the AD does not list specific post-installation checks, follow the MSB, service advisory and usual maintenance procedures to ensure the new turbocharger is properly installed and the engine is declared airworthy according to standard maintenance certification processes.

8. Record compliance actions in maintenance records. While the AD does not set a record format, document the identification of the affected turbocharger (P/N and SN), the SB used to determine applicability, the date of replacement, the replacement turbocharger P/N and SN, the work performed, and the certifying maintenance signatory. This documentation will demonstrate that the replacement required by the AD was completed "before further flight."

9. Coordinate with supply channels. Identify sources for replacement turbochargers and expected lead times. The AD mandates replacement but does not address supplier obligations or warranty. Plan accordingly to minimise aircraft downtime.

10. Reconcile with other directives. If your fleet operates internationally or under different regulatory oversight, consult FAA AD 2007-16-10 (referenced in the AD, Requirement, Note 4) and ensure that any parallel obligations are reconciled operationally. Compliance with one AD does not automatically satisfy another unless the actions and conditions align.

11. Seek regulatory direction if necessary. The AD provides no alternative compliance pathways, no appeal mechanism and no specified relief. If you face circumstances such as inability to source replacement parts, ambiguous SN listings, or disagreements over installation dates, contact CASA for guidance on permitted alternatives, extensions or relief. The AD does not itself provide a dispensation mechanism.

12. Maintain awareness of additional supplier guidance. Continue to monitor Kelly Aerospace, Teledyne Continental and STC-holder communications for updated service bulletins, parts notices or further advisories. Although the AD cites specific dated SBs and advisories, subsequent technical advice may be issued that bears on the safe installation or ongoing monitoring of turbochargers.

By following these steps , identify engines and turbocharger P/Ns, obtain the exact SBs cited, confirm SN and installation date, replace affected units before further flight, follow MSB and service advisory procedural instructions, and document all actions , operators will meet the AD’s explicit requirements as set out in the Applicability, Requirement and Compliance sections.

The AD as supplied does not include any historical amendments or re-issues beyond the original AD/CON/88 text dated 27 August 2007 and effective 30 August 2007. The document references multiple contemporaneous technical documents and their dates, which together form the technical background supporting the AD:

• Kelly Aerospace Power Systems Service Bulletin No. 026, Revision B, dated 27 July 2007 (Applicability).
• Kelly Aerospace Power Systems Service Bulletin No. 027, dated 25 July 2007 (Applicability).
• Teledyne Continental Aircraft Engine Mandatory Service Bulletin MSB07-4, dated 30 July 2007 (Requirement, Note 3).
• Cirrus Service Advisory SA 07-14 R1, dated 24 July 2007 (Requirement, Note 3).
• FAA Airworthiness Directive AD 2007-16-10 Amdt 39-15149, dated 1 August 2007 (Requirement, Note 4).

The inclusion of a particular revision of Kelly SB No. 026 (Revision B) indicates the AD relies on a specifically revised version of that service bulletin as the operative list for SN determination. The AD does not document the content of earlier revisions or subsequent revisions to the SBs after those dates.

No supersessions or cancellations are recorded in the AD as presented. There is no notation that AD/CON/88 replaced or was replaced by another AD. The AD does not provide an amendment log, nor does it append later changes to the AD’s text.

Administrative dating. The AD is signed by the Delegate of the Civil Aviation Safety Authority on 27 August 2007 and states that it "becomes effective on 30 August 2007." Those dates establish the AD’s issuance and operative start. However, aside from the effective date and the dates of the referenced SBs and advisories, the text contains no further amendment entries.

Users seeking a complete administrative amendment trail. For a full statutory or administrative amendment history beyond the AD text, interested parties will need to consult CASA records, regulatory databases or successive AD publications. The AD itself does not contain such a trail.

In summary, the AD’s amendment history is limited to its original issuance and the dated technical documents it references. No subsequent amendments or revocations are recorded in the provided text.

The provided AD text contains no information concerning litigation, judicial decisions, administrative appeals or legal challenges related to AD/CON/88. It does not cite any court cases, tribunal decisions or other adjudicative history. The AD’s content is technical and directive; it sets mandatory replacement and compliance obligations and includes references to related service bulletins, MSBs, a service advisory and an FAA AD. None of these references are linked in the document to litigation or judicial review.

Practical implication of absence of litigation information. Because the AD does not include any litigation history, one cannot draw any conclusions from this document about whether AD/CON/88 was ever contested, whether compliance obligations under the AD were challenged, or whether any judicial body interpreted the AD’s scope or requirements. Legal practitioners or researchers requiring information on litigation regarding this AD must consult external public records, administrative decisions, court archives or CASA enforcement files.

Operational consequence for operators. From an operational compliance perspective, the absence of litigation history in the AD means the directive should be treated as the authoritative technical requirement for the matters it addresses unless and until CASA issues an amendment, revocation, or another binding instrument. Operators should comply with the AD’s replacement requirement and maintain records of compliance, as the AD does not document any alternative legal processes or outcomes that would alter its directives.

Summary. No litigation history is present in the AD provided. Any enquiry into disputes, legal challenges or judicial interpretations of this AD must be conducted using external legal and regulatory sources; the AD itself provides none of that material.

(See previous "Gotchas" heading above for detailed operational pitfalls. This section summarises and expands on those points with emphasis on the specific AD wording and practical compliance risks.)

1. The AD does not include serial numbers inside its text. It requires the operator to consult Kelly Aerospace SB No. 026 Revision B and SB No. 027 to determine whether a turbocharger serial number is affected (Applicability). Relying on the AD alone without retrieving those SBs is insufficient.

2. The replacement obligation only applies to turbochargers installed on or after 20 March 2007. The AD explicitly states that turbochargers installed before that date require no further action (Applicability). Failure to verify the installation date accurately could either create unnecessary work or leave an affected turbocharger in service.

3. Immediate grounding risk. The AD requires replacement "before further flight" for affected installations (Compliance). Operators must be prepared to ground affected aircraft until the replacement is completed. Misinterpreting this language as allowing temporary operation pending parts arrival would not meet the AD’s terms.

4. Distinct P/Ns and STCs are involved. The AD covers TCM P/N 646677 and STC-installed P/N 466304-0003 for specific engines and STCs (Applicability; Requirement). Confusing P/Ns, or assuming the AD applies to all Kelly turbochargers irrespective of P/N and SN, is a compliance error.

5. No alternate remedy in the AD. The AD prescribes replacement; it does not authorise inspection-only options, temporary operational restrictions or staged replacements. Any alternate compliance approach must be sought from CASA, because the AD itself contains no provision for alternatives.

6. Relying on unreferenced documents. The AD refers to Teledyne Continental MSB07-4 and Cirrus Service Advisory SA 07-14 R1 for additional information (Requirement, Note 3). Those documents are guidance, but compliance requires replacement as mandated by the AD, not merely following guidance.

7. Parts supply and logistics. The AD mandates replacement but does not address parts availability or supplier obligations. Operators must plan for replacement lead times and potential grounding costs.

8. Documentation of work is essential. Although the AD does not prescribe record-keeping, operators will need clear maintenance records documenting the SN check, SB reference, replacement part details, and the certification of the work to evidence compliance.

9. Multiple regulatory jurisdictions. The AD refers to FAA AD 2007-16-10 (Requirement, Note 4). If aircraft operate under multiple jurisdictions, operators must ensure compliance in each jurisdiction, noting that compliance with one regulator’s AD does not automatically discharge another’s obligations.

10. No penalties spelled out. The AD does not include enforcement or penalty provisions. However, the mandatory nature of the AD and the "before further flight" requirement mean that operating contrary to the AD would be inconsistent with the directive and could attract enforcement under broader regulatory powers not detailed in the AD.

Takeaway. The AD’s technical specificity, the serial-number gating mechanism, the installation-date cutoff, and the "before further flight" timing are the elements most likely to cause operational mistakes if not handled precisely and documented carefully.

(Repeated for emphasis with procedural checklist and documentation focus.)

1. Obtain the AD and referenced documents. Immediately retrieve AD/CON/88, Kelly Aerospace SB No. 026 Revision B (27 July 2007), Kelly SB No. 027 (25 July 2007), Teledyne Continental MSB07-4 (30 July 2007) and Cirrus Service Advisory SA 07-14 R1 (24 July 2007). The AD requires use of the Kelly SBs to identify affected SNs and refers to the MSB and service advisory for additional replacement information (Applicability; Requirement, Note 3).

2. Audit maintenance records. For each aircraft with the listed engine models or STC modifications, locate the turbocharger part number data plate, application records and installation entries to confirm P/N and installation date. The AD’s applicability hinges on both P/N/SN and the installation date relative to 20 March 2007 (Applicability).

3. Cross-reference serial numbers. Using the appropriate Kelly SB, determine whether the installed turbocharger SN is listed as affected. If the SN is listed and the installation date is on or after 20 March 2007, the AD requires replacement before further flight (Applicability; Compliance).

4. Plan and procure replacement. Source a replacement turbocharger conforming to the engine and airframe installation requirements. Coordinate with Teledyne Continental, Kelly Aerospace, the STC holder or approved suppliers as needed. The AD’s Requirement instructs replacement; MSB07-4 and the Cirrus service advisory provide procedural assistance for specific installations (Requirement, Note 3).

5. Schedule maintenance and safety-of-flight checks. Arrange for qualified maintenance personnel to perform the removal and installation and any required engine or airframe checks. Ensure maintenance releases and return-to-service documentation meet regulatory requirements.

6. Complete replacement before further flight. Do not operate the aircraft with an affected turbocharger installed after determining applicability under the AD. The AD mandates replacement "before further flight" for affected installations (Compliance). Ensure no flights occur until replacement and necessary checks are complete.

7. Document everything. Make a maintenance entry that references AD/CON/88, lists the turbocharger P/N and SN removed, the replacement turbocharger P/N and SN installed, the Kelly SB used to determine applicability, the MSB or service advisory used for procedural guidance, the date of work, and the certifying signatory. Retain copies of the SBs and MSB used to make the applicability determination.

8. Reconcile with operator manuals and STC requirements. Ensure the installation of the replacement turbocharger complies with the engine manufacturer’s instructions, the STC installation requirements where applicable (SE10589SC or SA10588SC), and any airframe-specific service advisories (e.g. Cirrus SA 07-14 R1).

9. Notify appropriate parties as needed. While the AD does not require reporting of compliance in its text, consider notifying the airworthiness authority liaison, insurer or fleet manager as appropriate for operational records. If you encounter ambiguity in serial-number lists or installation dates, seek guidance from CASA.

10. Maintain vigilance for follow-up notices. Monitor communications from Kelly Aerospace, Teledyne Continental, STC holders and CASA for any follow-up ADs, amendments, or supply advisories that might affect compliance or replacement options.

By following this procedural checklist and carefully documenting the determinations and work performed, operators and maintainers will align their practices with the AD’s explicit requirements as set out in the Applicability, Requirement and Compliance sections.