AD/CON/87 Amdt 2 - Superior Air Parts - Cylinder Assemblies

The AD is structured around a finite set of concrete concepts and mechanisms drawn from the supplied text.

• Applicability by part number and engine family. The AD lists the specific SAP PMA cylinder assembly part numbers: SA47000L-A1, SA47000L-A20P, SA47000S-A1, SA47000S-A20P, SA47000S-A21P, SA52000-A1, SA52000-A20P, SA52000-A21P, SA52000-A22P, SA52000-A23P, SA55000-A1 and SA55000-A20P (Applicability). It then lists the TCM engine models into which those P/N cylinder assemblies may be installed, including multiple O-470, IO-470, IO-520, TSIO-520 and IO-550 model suffixes (Applicability). The AD refers users to FAA AD 2007-04-19R1 for a more complete list of aircraft models that might carry the specified engines (Note 1).

• Incorporation by reference to a manufacturer service bulletin for S/N identification. The AD requires operators to check cylinder assembly serial numbers in accordance with Superior Air Parts Mandatory Service Bulletin B06-01 Revision E dated 24 January 2007 (Requirement 1). The MSB B06-01 Rev E is therefore the operative technical procedure for identifying which specific assemblies are affected beyond the P/N level.

• Removal from service and prohibition on installation. If a cylinder assembly is affected both by P/N (the AD applicability list) and by S/N as identified in the SAP MSB, it must be removed from service (Requirement 1). The AD also forbids installation of any cylinder assembly with the P/Ns and S/Ns identified in Requirement 1 into any engine (Requirement 2).

• Compliance timing keyed to usage. The compliance requirement is measured against total time in service of the cylinder assemblies, with a hard deadline of before they reach 150 hours TTIS (Compliance 1). The AD contemplates exceptional movement to reach maintenance when cylinders already exceed 150 hours, by allowing special flight permits for ferrying to a maintenance base (Note 3).

• Link to foreign authority and amendment process. The AD explicitly references FAA AD 2007-04-19R1 Amendment 39-15005 and states that the current amendment corrects the manufacturing date range in light of that FAA AD revision and makes editorial changes (Background). The AD notes prior amendment steps and effective dates: original issue effective 2 March 2007; Amendment 1 effective 5 March 2007; this Amendment effective 7 June 2007 (Background).

• Stated safety hazard. The Background identifies the proximate hazard as cylinder separation observed in service, with safety risks listed as engine failure, possible engine compartment fire, and damage to the aeroplane (Background). The AD is expressed as preventive action directed to that hazard.

These core concepts define the regulatory mechanism: identify potentially affected hardware components using P/N and S/N, use a manufacturer procedure to establish which specific items are non-compliant, remove those items from service, and prevent reinstallation, all under a defined timeframe keyed to usage, with limited operational relief through special flight permits. The AD is limited in scope to the listed P/Ns and the S/Ns identified in the SAP MSB, and it relies on cross-reference to a manufacturer document and to an FAA AD for extended applicability information.

The primary direct obligations fall upon aircraft operators, engine owners and maintenance organisations responsible for TCM 470, 520 and 550 series reciprocating engines that may be fitted with the listed SAP PMA cylinder assemblies. The AD applicability lists specific cylinder assembly P/Ns and specifies the engine models in which such assemblies might be installed; therefore any operator whose aircraft contains those engines and who has parts with those P/Ns is directly affected (Applicability, Requirement 1).

Specifically, persons who must act include:

• Aircraft owners and operators who operate aircraft powered by the listed TCM engine models, because the AD requires them to determine whether their engines are fitted with the listed P/N cylinder assemblies and to have the S/Ns checked in accordance with SAP MSB B06-01 Rev E (Requirement 1).

• Maintenance organisations and licensed engineers, because the AD requires inspection against the SAP MSB procedure and removal from service of affected cylinder assemblies (Requirement 1). The work required will typically be carried out by engineering staff authorised to perform engine maintenance, and they must follow the MSB procedure incorporated by reference.

• Suppliers and installers of cylinder assemblies, because Requirement 2 expressly prohibits installation of cylinder assemblies with the P/Ns and S/Ns identified in Requirement 1 into any engine. This creates an obligation on any party installing cylinder assemblies to confirm that a part is not one of the identified prohibited S/Ns.

• Certifying and regulatory staff within CASA and delegated representatives. The AD is issued by the Civil Aviation Safety Authority and signed by a delegate (Background). Regulatory staff will have enforcement and oversight roles for compliance with the AD.

Indirectly affected parties include aircraft operators whose aircraft are temporarily grounded while affected cylinder assemblies are removed, and insurers and lessors who have a financial interest in aircraft airworthiness. The AD creates a compliance cost borne by operators and maintainers in respect of identification, potential replacement and downtime. The AD contemplates that aircraft with cylinder assemblies already exceeding 150 hours TTIS can be moved under special flight permit to a maintenance base rather than be immediately grounded (Compliance 1; Note 3), which affects operational decision-making by operators and the regulators who issue such permits.

The AD text also indicates a linkage to non-Australian authorities and documents; it references FAA AD 2007-04-19R1 and Superior Air Parts MSB B06-01 Rev E (Applicability, Requirement 1, Note 1, Note 2). Therefore, suppliers and parts distributors who track international airworthiness directives and service information are also affected insofar as they must prevent sale or installation of the identified S/N parts within Australia.

Finally, because the AD deals with safety-critical engine components and specifically addresses the risk of cylinder separation, any party responsible for continued airworthiness, maintenance planning, or airworthiness certification of the aircraft is implicated.

The AD sets specific duties for operators, maintainers and installers and notes one operational right in the form of a special flight permit. The duties are expressed in mandatory terms in the body of the AD.

Key duties

• Identification duty. Operators must determine the P/N of the cylinder assemblies installed in affected engines (Requirement 1). This is a precondition step and is to be performed in accordance with the SAP MSB where S/N checking is required.

• Serial number verification duty. Where an engine is fitted with cylinder assemblies of the P/Ns listed in the Applicability section, operators must check the serial numbers of those assemblies in accordance with Superior Air Parts MSB B06-01 Revision E dated 24 January 2007 (Requirement 1). The MSB is incorporated as the technical method for determining which S/Ns are affected.

• Removal duty. Remove from service any cylinder assemblies that are both within the AD's P/N applicability and listed by S/N in SAP MSB B06-01 Rev E (Requirement 1). The AD makes the removal obligation unconditional once a part meets both criteria.

• Installation prohibition. Do not install any cylinder assembly with the P/Ns and S/Ns identified in Requirement 1 into any engine (Requirement 2). This creates an ongoing prohibition on use of the identified parts.

• Compliance scheduling. Ensure the identification and removal steps are completed before the cylinder assemblies reach 150 hours TTIS (Compliance 1). This adds a time-in-service threshold to the duty.

These duties are framed as mandatory obligations; the AD is an enforcement instrument issued by CASA (Background).

Operational right

• Special flight permits to ferry to maintenance. The AD allows special flight permits to be issued to ferry an aircraft to a maintenance base where the cylinder assemblies already have more than 150 hours TTIS (Note 3). This is an operational mitigation for aircraft that would otherwise be immediately out of compliance due to their accumulated TTIS.

Who decides

• CASA as issuer of the AD is the regulatory decision-maker for the instrument (Background, signature by David Punshon). CASA will also be the authority responsible for enforcement and for issuing special flight permits where warranted.

• Superior Air Parts' MSB B06-01 Rev E is the technical source for serial number identification. The AD places the practical task of S/N identification into the hands of operators and maintenance organisations but requires them to follow the MSB procedure.

What rights are not expressed

• The AD text does not identify any compensation mechanism for owners or operators who must remove or replace affected parts. It does not create a substitution or mandatory supply obligation on any supplier. The AD also does not itself specify replacement parts or approved alternatives; it confines itself to identification, removal and prohibition on installation.

These duties and the narrow operational right for ferrying shape operator behaviour: mandatory inspections, removal of affected hardware and a prohibition on reinstalling those parts, plus the ability to seek temporary movement under special permit if necessary.

The AD text itself does not specify civil or criminal penalties, fine amounts, or the specific enforcement processes that CASA will apply for non-compliance. The document is an instrument issued by the Civil Aviation Safety Authority and is signed by a CASA delegate, which indicates that compliance is a regulatory obligation of aviation participants (Background). The AD imposes mandatory technical obligations: identification of P/N and S/N per SAP MSB B06-01 Rev E, removal of affected cylinders, and prohibition on installation (Requirement 1 and Requirement 2). In practice, such obligations are enforceable under the regulator's enforcement framework, but the AD text does not enumerate enforcement mechanisms or penalty schedules.

What the AD does provide for enforcement-relevant facts

• Mandatory status of actions. The AD frames its actions as requirements, for example, "Remove from service any cylinder assemblies that are affected by both the applicability of this AD and the S/N as detailed in the procedure given in SAP MSB B06-01 Rev E" (Requirement 1). This language creates a clear regulatory expectation that non-compliance is not permissible.

• Delegation and effectivity. The AD is signed by a CASA delegate and includes an effective date for the amendment, 7 June 2007 (Background). The effective date is relevant to enforcement because it fixes the point at which the duties become operative.

• Compliance timing. The AD establishes a compliance timing before 150 hours TTIS for cylinder assemblies (Compliance 1). This creates a measurable deadline against which inspectors or CASA can assess compliance.

• Operational relief narrowly confined. The AD allows special flight permits to ferry aircraft with cylinder assemblies that have greater than 150 hours TTIS to a maintenance base (Note 3). The existence of this relief indicates a channel that operators can use to achieve compliance without breaching the AD's intent.

What the AD omits about penalties

• The AD does not state the sanctions, administrative procedures, or prosecution avenues that CASA will use for breaches of the AD. It also does not set out an infringement notice scheme, fine amounts or remedial notice powers within its text. Those enforcement mechanisms are therefore to be found in CASA's broader regulatory framework and enforcement policies, not in the AD itself.

Practical enforcement implications for operators and maintainers

• Because the AD identifies parts by P/N and S/N and sets a TTIS compliance threshold, enforcement checks are straightforward in principle: inspect the parts and their logbook TTIS and confirm removal where necessary. However, the AD’s incorporation by reference to SAP MSB B06-01 Rev E means that enforcement relies on the regulator and inspectors having access to and understanding of the external MSB.

• Operators wanting to use the special flight permit option must approach CASA or the relevant authority with an application. The AD explicitly contemplates that permits may be issued for ferrying in cases where parts already exceed the 150 hours TTIS limit (Note 3).

In short, the AD sets clear technical obligations and a compliance time marker, but the AD text leaves the specifics of penalties and enforcement process to CASA’s general enforcement mechanisms rather than detailing them in the instrument.

The AD expressly cross-references and aligns with external instruments and technical guidance, creating an interaction surface between CASA’s directive, a manufacturer service bulletin, and a foreign regulator’s AD.

• Incorporation of manufacturer service bulletin. The AD requires serial number checking "in accordance with Superior Air Parts, Inc Mandatory Service Bulletin (MSB) B06-01 Revision E dated 24 January 2007" (Requirement 1). That incorporation by reference makes the MSB the operative technical method for executing the AD. The AD therefore depends on an external manufacturer's document to define which S/Ns are affected, and operators must follow that document to comply with the AD.

• Reference to FAA AD. The AD refers to FAA AD 2007-04-19R1 Amendment 39-15005 (Note 2; Background). It also notes that a complete list of aircraft models that may carry the affected TCM engines can be found in that FAA AD (Note 1). The AD states that the current amendment corrects the manufacturing date range based on Revision 1 of the FAA AD dated 23 March 2007 (Background). Thus the AD is coordinated with and responsive to the FAA action; it treats the FAA AD as a complementary source for applicability context.

• Relationship with operational authorisations. The AD provides for special flight permits to ferry aircraft to maintenance bases where cylinder assemblies exceed 150 hours TTIS (Note 3). Special flight permits are an aviation regulatory mechanism distinct from the AD itself; the AD recognises the existence of that mechanism as an operational interface. The AD does not, however, set the criteria for issuing such permits; it only notes that they may be issued.

• Interaction with maintenance standards and continuing airworthiness obligations. While the AD does not recite generic maintenance regulations, it directly imposes actions that affect continuing airworthiness: identification, removal from service and prohibition on installation of specific components. These obligations interact with operators’ continuing airworthiness responsibilities, maintenance release and logbook recording processes, and with any obligations arising under airworthiness certification and continuing airworthiness laws. The AD does not itself restate those broader obligations but operates within that legal ecosystem.

• International coordination. By referencing the FAA AD and incorporating a manufacturer MSB, this AD demonstrates the typical pattern of aviation safety regulation wherein domestic regulators align actions with findings from manufacturers and foreign authorities. The AD’s corrective amendment was taken to align the manufacturing date range with the FAA AD's revision (Background), indicating CASA’s intent to maintain consistency with those external determinations in its domestic directive.

What the AD does not specify about interactions

• The AD does not, within its text, resolve conflicts between the MSB and CASA requirements because the MSB is incorporated as the method to identify S/Ns. The AD does not define appeal rights, dispute resolution pathways, or the legal status of the MSB beyond its role as the identification procedure. Any legal questions about the content of the incorporated MSB or its use in meeting CASA requirements would need to be resolved under broader administrative law or regulatory dispute mechanisms, none of which are detailed in the AD itself.

In sum, the AD operates in direct interaction with the SAP MSB and the FAA AD; it uses those external sources to define technical scope and to ensure international consistency, while relying upon CASA’s regulatory authority for enforcement.

The AD text contains an internal amendment history that records a sequence of issuances and corrections. The chronology and the specific amendment actions are set out in the Background section.

• Original issue. The Background records that the original issue of this AD became effective on 2 March 2007 (Background). That initial issuance appears to have been the first regulatory act addressing the identified cylinder separations.

• Amendment 1. The AD records a first amendment, "Amendment 1 of this AD", which "made reference to the cylinders assemblies detailed in the manufacturer’s service bulletin and became effective on 5 March 2007" (Background). Thus Amendment 1 introduced an explicit linkage to the manufacturer’s service bulletin as part of the AD framework.

• Current amendment (Amdt 2). The instrument before the reader is Amendment 2. The Background states that the current amendment corrects the manufacturing date range based on Revision 1 of the FAA AD 2007-04-19 dated 23 March 2007 and includes a few editorial changes (Background). The AD gives an effective date for this Amendment as 7 June 2007 (Compliance; "This Amendment becomes effective on 7 June 2007.") The signature block is dated 26 April 2007 and signed by David Punshon, Delegate of the Civil Aviation Safety Authority (Background).

• Relationship with FAA AD revisions. The Background emphasises that the current amendment aligns manufacturing date range information with FAA AD 2007-04-19R1 Amendment 39-15005 (Background). The document therefore records that its amendment activity was responsive to developments in the FAA AD.

What the amendment history conveys about instrument dynamics

• Rapid sequence of updates. The short interval between the original issue (2 March 2007), Amendment 1 (5 March 2007), the FAA AD revision (23 March 2007) and this Amendment becoming effective on 7 June 2007 shows the document moved through multiple iterations in a compressed timeframe. The Background explicitly records those dates and the reason (correction of the manufacturing date range) for the current amendment (Background).

• Incorporation shift. Amendment 1 introduced explicit reference to the manufacturer’s service bulletin; the current amendment retained that linkage and adjusted manufacturing date range in light of the FAA revision. Thus the AD demonstrates a pattern in which initial domestic action is followed by incorporation of manufacturer technical guidance and then harmonisation with an international regulator's refinement.

• Editorial changes. The Background notes that this amendment also makes "a few editorial changes" (Background). The AD does not catalogue those editorial changes in the text provided. The substance of the AD obligations,in particular Requirements 1 and 2 and the compliance timing,are presented in the instrument as the operative requirements.

For practitioners, the amendment history in the AD is the authoritative trace of when obligations became effective and how the AD's scope and references evolved. The AD supplies effective dates and references to the external FAA AD that prompted the correction.

The text of AD/CON/87 Amdt 2 contains no reference to litigation, court proceedings, judicial review, or any legal challenges to the directive. The Background section provides a narrative of discovery of separated cylinder assemblies and records the administrative amendment steps and effective dates, but there is no mention of legal proceedings or judicial involvement in the document as supplied (Background).

What the AD does show about dispute or review pathways

• Administrative instrument without litigation record. The AD functions as a regulatory safety instrument issued by CASA and signed by a delegate (Background). The document itself is administrative in nature and does not include adjudicative language or a record of legal challenges.

• Absence of litigation references. Because the AD does not mention litigation, there is no information within this instrument about any appeals, judicial review applications, or disputes over either factual findings (such as the safety risk) or legal authority used to issue the AD.

Practical implications for practitioners assessing litigation risk

• No litigation history in the AD document. Practitioners should note that AD/CON/87 Amdt 2 as supplied does not document any litigation. If a party needs to know whether any external litigation has occurred concerning the parts, the MSB, the FAA AD, or CASA’s issuance of the AD, this AD does not provide that information.

• Need to consult external records for litigation. Any enquiry into litigation history would require searching court or tribunal records, administrative review records, or CASA enforcement action logs outside the scope of this AD document. The AD itself provides no pointers or statements about legal challenges.

In short, the AD contains no litigation history; it documents administrative action and amendment chronology only.

This AD contains several practical points and potential pitfalls that will affect compliance planning and operational decision-making. These are drawn directly from the AD text.

• Applicability is by P/N and linked S/N. The AD’s applicability section lists specific Superior Air Parts cylinder assembly part numbers and the TCM engine models in which such assemblies may be installed (Applicability). Compliance is not resolved by P/N alone. Requirement 1 requires a serial number check in accordance with SAP MSB B06-01 Rev E. A common misstep would be to assume that mere presence of a P/N triggers removal without performing the S/N verification required by the MSB; conversely, operators who ignore the S/N check risk keeping an affected cylinder in service.

• Reliance on an external MSB for operative detail. The AD makes the SAP MSB B06-01 Rev E the operative method for S/N checking (Requirement 1). The AD does not reproduce the S/N list or the detailed inspection steps. Therefore, operators must obtain and follow the MSB. A potential pitfall is failing to secure or correctly apply the MSB procedure, or assuming that the AD's P/N list alone is exhaustive.

• TTIS compliance threshold. The AD sets compliance as "Before cylinder assemblies reach 150 hours total time in service (TTIS)" (Compliance 1). Operators may misinterpret this as applying only to new installations; in fact, it applies to any affected assemblies before they accumulate 150 TTIS. Aircraft with cylinder assemblies already above 150 hours TTIS must not assume automatic legality; the AD explicitly notes special flight permits may be issued to ferry such aircraft to a maintenance base (Note 3). Thus, operators with higher TTIS parts must plan for obtaining a permit rather than assume continued operation.

• Prohibition on installation extends beyond removal. Requirement 2 says "Do not install any cylinder assembly with part numbers and serial numbers identified in Requirement 1 of this AD, into any engine." That prohibition persists and affects procurement and installation workflows. A possible oversight is failing to quarantine removed parts or to ensure supply chain and fitment checks prevent reinstallation.

• The AD cross-references FAA documentation for aircraft-model lists. Note 1 states a complete list of aircraft models that might carry the applicable TCM engines "may be found in FAA Airworthiness Directive 2007-04-19R1 Amendment 39-15005." Failure to consult that FAA AD could leave an operator uncertain about applicability to particular aircraft types. Practitioners should not rely solely on the engine-model list in the AD if their aircraft type might be outside the enumerated examples without checking the FAA AD for full context.

• Amendment timing and dates. The AD has gone through rapid amendment; the text records an original issue effective 2 March 2007, an Amendment 1 effective 5 March 2007, and this Amendment effective 7 June 2007 (Background). Different versions may have different scope or dates. Relying on an earlier version rather than the current Amendment 2 could lead to compliance errors.

• No replacement or remedy specified. The AD requires removal and prohibits installation of the identified parts but does not specify approved replacement parts, replacement criteria, or supplier obligations. Operators must therefore source compliant replacement cylinders through normal approved parts channels. Assuming the AD provides replacement guidance would be an error.

• Enforcement and penalties not stated. The AD does not specify penalties or the enforcement mechanism in the document itself (Penalties and enforcement). Practitioners should not assume that the AD contains a penalty schedule and should consult CASA’s broader enforcement policies for consequences of non-compliance.

• Special flight permits require approval. Note 3 contemplates issuing special flight permits for ferrying aircraft with cylinder assemblies that exceed 150 hours TTIS. Operators may mistakenly assume such permits are automatic. Permits require application and regulatory approval and are conditioned on CASA’s processes, which are not detailed in the AD.

• Recordkeeping and traceability obligation implied. The AD’s requirements for identifying P/N and S/N imply a need for accurate parts records and logbooks. Failing to maintain or produce these records will complicate demonstrating compliance, but the AD does not specify recordkeeping procedures. Practitioners should anticipate the need to substantiate P/N and S/N checks under regulatory oversight.

These gotchas translate into concrete operational risks: misidentifying applicability, failing to follow the SAP MSB, running past the 150-hour TTIS threshold without remediation, reinstalling prohibited parts, or failing to obtain necessary permits. The AD’s reliance on external documents and its amendment history make attention to document control and versioning essential.

The AD sets out a concise, ordered compliance pathway. Below are stepwise actions drawn directly from the AD text and the practical implications they create.

1. Identify installed cylinder assembly part numbers. Determine the P/N of each cylinder assembly installed in your TCM 470, 520 or 550 series engine. The AD supplies a list of affected P/Ns; confirm whether any installed cylinder assembly matches one of the P/Ns listed in the Applicability section (Applicability).

2. Check serial numbers in accordance with SAP MSB B06-01 Rev E. If your engine is fitted with one of the listed P/Ns, check the serial numbers of the cylinder assemblies in accordance with Superior Air Parts Mandatory Service Bulletin B06-01 Revision E dated 24 January 2007 (Requirement 1). Acquire the MSB and follow the procedure it prescribes for identifying affected S/Ns. The AD makes the MSB the operative method for S/N identification.

3. Remove affected cylinder assemblies from service. If an assembly is both within the AD’s P/N applicability list and identified by S/N in the SAP MSB, remove that cylinder assembly from service as required in Requirement 1. The AD requires removal where both criteria are met.

4. Do not install identified P/N/S/N assemblies. Do not install any cylinder assembly that has the P/Ns and S/Ns identified in Requirement 1 into any engine (Requirement 2). Ensure procurement, stock and installation controls prevent inadvertent reinstallation. Quarantine removed parts and update inventory records.

5. Respect the compliance timing. Complete the identification and removal steps before the cylinder assemblies reach 150 hours TTIS (Compliance 1). For assemblies already beyond 150 hours TTIS at the time the AD becomes effective, do not attempt unrestricted flight; instead, seek a special flight permit to ferry the aircraft to a maintenance base if required (Compliance 1; Note 3).

6. Seek a special flight permit where necessary. If an aircraft’s cylinder assemblies already exceed 150 hours TTIS, apply to the appropriate authority for a special flight permit to ferry the aircraft to a maintenance base (Note 3). The AD notes such permits "may be issued" for ferrying in these circumstances. Expect to provide justification and operational details when applying.

7. Coordinate with maintenance providers and parts suppliers. Since the AD does not specify replacement parts, co-ordinate with approved maintenance organisations and parts suppliers to obtain compliant cylinder assemblies not identified in the AD. Ensure that any replacement cylinder assemblies are of approved P/Ns and bearing no prohibited S/Ns.

8. Consult FAA AD for aircraft-model coverage if needed. If there is uncertainty about whether a particular aircraft model may be fitted with the affected TCM engines, consult FAA Airworthiness Directive 2007-04-19R1 Amendment 39-15005 for a complete list of aircraft models that might carry the specified engines (Note 1).

9. Document actions and compliance timing. Although the AD does not specify a recordkeeping format, document the P/N and S/N checks performed, the TTIS at the time of inspection, any removals carried out, and any special flight permits sought or granted. This documentation will be necessary to demonstrate compliance in any regulatory inspection or audit.

10. Keep informed about the relevant documents and amendments. The AD was itself amended to align with FAA AD 2007-04-19R1 and incorporates SAP MSB B06-01 Rev E. To remain compliant, ensure you use the current revision of the MSB and refer to the correct and current AD effective version. The AD’s Background identifies amendment dates and the effective date of this amendment as 7 June 2007 (Background).

Practical operational checklist

• Obtain the AD text and SAP MSB B06-01 Rev E before performing inspections.
• Review engine logbooks to identify P/Ns and TTIS for each cylinder assembly.
• Perform S/N checks per the MSB and identify affected assemblies.
• Schedule and perform removal activities for affected units prior to 150 hours TTIS.
• Apply for a special flight permit if any assembly has already exceeded 150 hours TTIS and immediate ferrying is required.
• Update maintenance records and parts inventory to prevent reinstallation of prohibited units.
• Source and install compliant replacement cylinders through approved channels.

Following the AD’s explicit steps (Requirement 1, Requirement 2, Compliance 1, Note 3) and coordinating with the manufacturer’s MSB and CASA’s special permit process constitutes the instrument’s compliance pathway. The AD does not specify replacement parts, penalties, or the detailed administrative process for permits; those are to be addressed through existing maintenance and regulatory channels.