AD/CESSNA 500/30 - Engine Fire Bottle Wiring

The AD organises its mandate around a small set of concepts that determine applicability, actions and acceptable compliance methods. These concepts are stated in the AD text; they should be treated as the operative terms of compliance.

Applicability: The AD applies to "Cessna Model 500 and 501 aeroplanes as identified in Cessna Service Bulletin (SB) SB500-26-02 Revision 1 dated 7 July 2005." The SB reference is integral to defining the exact serial/model scope and the technical work required. The AD therefore links regulatory applicability to the content and scope of a specific manufacturer service bulletin.

Action specification by reference: The AD delegates the exact technical procedure to SB500-26-02, Revision 1. Requirement 1 instructs operators to accomplish the installation and testing "in accordance with SB500-26-02, Revision 1." Requirement 2 explicitly requires verification against Revision 1 for aeroplanes where the original SB work was previously performed. Where the AD refers to the SB it makes procedural compliance dependent on following the SB steps, not on broader or alternative methods, unless those alternatives are an FAA-approved AMOC as described.

AMOC acceptance: The AD explicitly recognises later revisions of SB500-26-02 as acceptable if they have FAA approval as an AMOC to FAA AD 2007-11-17. Thus acceptance of alternative or revised methods is tied to FAA AMOC decisions and to conformity with the FAA AD referenced. The AD therefore creates a cross‑jurisdictional interaction with existing FAA approvals.

Time-limited compliance and operational gating: Requirements 1 and 2 are subject to a time-in-service or calendar limit (100 hours TIS or 60 days, whichever first). Requirement 3 creates a fitness-to-fly gating requirement: discovered non-conforming wiring must be corrected "before further flight." Requirement 4 creates an immediate operational restriction on the installation of replacement fire extinguisher bottles unless the identification sleeves have been installed.

Risk mitigation aim: The AD states its safety purpose in the Background: to ensure engine fire bottles actuate and that flammable fluids are not supplied during a fire, because reports indicate mis-wiring could otherwise result in an unextinguished nacelle fire. The specific mitigation chosen is wiring identification (sleeves), reconnection to correct studs, and testing to confirm proper connectivity,measures intended to reduce the likelihood of mis‑wiring and to produce positive verification.

Document provenance and effect: The AD is an instrument of the Civil Aviation Safety Authority, signed on 19 June 2007 and becoming effective 2 August 2007. It cross-references FAA AD 2007-11-17 Amdt 39‑15074 and ties acceptable AMOCs to FAA approvals. The AD therefore relies on and defers in part to FAA determinations for acceptance of revised service bulletin material.

The plain text of the AD identifies the immediate affected parties by applicability and by the specified actions. The AD applies to "Cessna Model 500 and 501 aeroplanes as identified in Cessna Service Bulletin (SB) SB500-26-02 Revision 1 dated 7 July 2005." Practically, this means:

• Aircraft owners and operators of Cessna Model 500 and 501 aircraft whose serial numbers or configurations are listed in the cited SB are directly affected. The AD sets mandatory maintenance and inspection tasks for those aircraft: installation of identification sleeves, verification of previously completed wiring changes, corrective wiring work if non‑conforming, and limits on installation of replacement bottles unless sleeves are fitted.
• Maintenance organisations and engineers certificated to perform maintenance on these aircraft will be required to carry out the works "in accordance with SB500-26-02, Revision 1," including the specified testing procedure of connections. They are responsible for ensuring the maintenance conforms to the SB and the AD’s timeframes. The AD does not specify who within the maintenance chain must certify the work, but it requires completion and testing.
• Parts suppliers and line maintenance that handle fire extinguisher bottles are indirectly affected by Requirement 4 because replacement bottles "may not be installed as replacement spares" unless identification sleeves are present per Requirement 1. This restricts the circumstances under which spares may be fitted and thereby affects spares handling practices.
• Regulators and inspectors within the Civil Aviation Safety Authority will be responsible for oversight and enforcement of the AD’s requirements; the AD itself is an enforceable instrument by CASA and is signed by its delegate.
• The FAA is an external actor referenced in the AD. The AD states that "Later revisions of the SB500-26-02, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-11-17, are considered acceptable for compliance with the equivalent Requirements of this Directive." That establishes that FAA AMOC approvals affect which SB revisions are acceptable for compliance under this AD.

Who pays: The AD does not specify funding mechanisms. The likely payers are aircraft owners/operators who must pay for parts (identification sleeves, possible replacement of mis-wired components), labour for installation, verification, repeated testing and any corrective wiring work. The Directive text contains no compensation, subsidy or cost-recovery provisions; it sets obligations and timeframes but does not allocate financial support or exemptions.

Who decides: The AD places design/method decisions in three places: (1) the SB500-26-02 Revision 1 contains the technical method to be followed; (2) the FAA controls acceptance of later SB revisions by approval as AMOCs to FAA AD 2007-11-17; and (3) CASA, through issuing the AD, sets the legal obligation and effective date (2 August 2007). Thus compliance options are controlled by the SB content and any FAA AMOC approvals, while CASA determines legal enforceability.

Limitations and scope: The AD does not list serial numbers or expand the SB’s scope in the text; applicability depends on the SB. The AD does not specify recordkeeping, cost allowances, or an explicit enforcement penalty regime in its text; the only judicial or administrative procedures are the AD instrument itself and the effective date. No other classes of persons are named in the AD text.

Duties

• Install identification sleeves on positive and negative terminal wires of engine fire extinguishing bottles, re‑connect to the correct studs and test connections, repeating reconnection until the tests indicate correct connection, in accordance with SB500-26-02 Revision 1, if the work has not previously been done under the earlier SB (Requirement 1). The AD specifies both the hardware change (identification sleeves) and the verification protocol (test, and repeat as applicable).
• Verify that previously accomplished wiring changes (performed under the original SB500-26-02 dated 1 April 2005) conform to the changes described in SB500-26-02 Revision 1 (Requirement 2).
• Correct any non-conforming wiring changes discovered during the verification in Requirement 2 to conform to Revision 1, and ensure corrections are effected before further flight (Requirement 3). This imposes a flight-safety gating obligation.
• Do not install fire extinguisher bottles as replacement spares on any affected Model 500 or 501 aeroplane unless identification sleeves have been installed in accordance with Requirement 1; this prohibition is effective immediately on the AD’s effective date (Requirement 4).

Rights and options explicitly recognised in the AD

• Use of later revisions of SB500-26-02 is permitted for compliance, but only if those later revisions have been approved by the FAA as an AMOC to FAA AD 2007-11-17. In short, operators can comply by using later SB revisions, but acceptance depends on FAA AMOC approval. The AD states: "Later revisions of the SB500-26-02, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-11-17, are considered acceptable for compliance with the equivalent Requirements of this Directive." This creates a conditional right to follow revised manufacturer instructions, subject to an external authority’s acceptance.
• The AD does not set out appeals, waivers or administrative review procedures in its text. It also does not specify alternative compliance pathways within the AD itself beyond the FAA AMOC pathway. Any further rights to apply for exemptions or alternative methods are not described in the AD.

Operational constraints stemming from duties

• Timing constraints: Requirements 1 and 2 must be completed "Within 100 hours time in service (TIS) or 60 days after the effective date of this Directive, whichever occurs first." Operators must therefore plan maintenance within the earlier of those metrics.
• A discovered non-conformance under Requirement 2 imposes an immediate corrective duty: corrections must be made before further flight (Requirement 3). This turns verification into a possible immediate grounding trigger until corrections are complete.
• The immediate bar on installing replacement bottles without sleeves (Requirement 4) affects parts replacement decisions from the AD’s effective date onward.

Documentation and procedure adherence

• The AD requires work to be performed "in accordance with SB500-26-02, Revision 1" for the specified tasks. That places a duty on maintenance personnel to follow the SB’s procedures and test criteria verbatim to meet the AD obligations. The AD does not itself reproduce the step‑by‑step technical method; it makes the SB the operative technical standard.

Unspecified duties or rights

• The AD does not specify recordkeeping, certification statements, reporting of findings to CASA or Cessna, or financial assistance. Those matters, if required, would need to be determined by reference to other regulatory instruments or by contacting CASA; the AD text is silent on them.

Direct text available in the AD provides the enforcement instrument and effective date but does not enumerate fines, penalty provisions or enforcement procedures. The AD states that it "becomes effective on 2 August 2007" and is presented as an Airworthiness Directive issued by the Civil Aviation Safety Authority, signed by David Punshon, Delegate of the Civil Aviation Safety Authority on 19 June 2007. Beyond this, the AD contains no explicit penalty schedule or enforcement steps within its text.

What the AD does specify for enforcement-relevant purposes

• Compulsory nature: By its form and text as an Airworthiness Directive, the document imposes mandatory actions on the specified operators and aircraft. The AD contains prescriptive duties and timeframes (for example, "Within 100 hours TIS or 60 days" for Requirements 1 and 2, and "before further flight" for Requirement 3). These are expressed as obligations rather than recommendations.
• Operational gating: Requirement 3 places a condition on continued airworthiness and flight release: any discovered non-conforming wiring must be corrected "before further flight." That effectively makes certain findings grounds to withhold flight if they are not corrected.
• Immediate operational restriction: Requirement 4 prohibits installation of replacement fire extinguisher bottles unless identification sleeves have been installed, and that prohibition is "As of the effective date of this Directive." This is an operational prohibition which could be enforced by regulators as part of maintenance and airworthiness oversight.

What the AD does not specify

• The AD does not set out statutory penalty provisions, administrative fines or prosecution mechanisms. It also does not describe the procedural steps CASA would take to verify compliance (for example inspections, audits or mandatory reporting) nor does it direct specific recordkeeping.
• The AD does not state whether CASA will issue letters or notices to operators, or how CASA will handle non-compliance administratively. Any enforcement actions that may follow non-compliance (such as grounding notices, revocation of certificates, fines or prosecutions) are not detailed in the AD text.

Implication for practitioners

• Because the AD is a mandatory instrument issued by CASA, the obligations it contains should be treated as enforceable requirements by operators, and maintenance release to service and airworthiness certificates should reflect compliance before flight where the AD conditions require it. However, the specific enforcement steps, penalties or administrative remedies are not described in the AD and must be inferred from the broader regulatory framework outside the AD or by consulting CASA guidance. The AD does provide two concrete enforcement levers: time-limited compliance and the "before further flight" correction mandate.

The AD explicitly ties its compliance regime to an FAA action and to a manufacturer service bulletin, creating a cross-reference relationship to other regulatory and technical instruments. The text contains the following interaction points:

Reference to an FAA AD: The AD notes "Note: FAA AD 2007-11-17 Amdt 39-15074 refers." That places this CASA AD in direct relationship with an existing FAA AD on the same subject matter. The FAA AD is part of the regulatory background to this Directive and is explicitly referenced rather than replicated.

AMOC dependence: The AD states: "Later revisions of the SB500-26-02, approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-11-17, are considered acceptable for compliance with the equivalent Requirements of this Directive." This creates a specific and conditional interaction:

• Acceptance of later SB revisions for compliance purposes under this CASA AD depends on FAA approval of those revisions as AMOCs to FAA AD 2007-11-17. Therefore, FAA administrative actions (granting AMOCs) have direct legal effect on what constitutes acceptable compliance under this CASA AD.
• The AD does not state that CASA itself must approve those SB revisions or AMOCs; rather, it defers to FAA AMOC approvals. This is an interaction where an external regulator’s technical approvals alter the CASA AD’s list of acceptable methods of compliance.

Reference to manufacturer SB for technical requirements: The AD uses Cessna SB500-26-02, Revision 1 dated 7 July 2005 as the operative technical standard for installing identification sleeves, reconnection and testing. The AD therefore functions as a legal enforcement of a manufacturer’s service bulletin, integrating technical manufacturer guidance into enforceable regulatory obligations.

Absence of cross-reference to domestic statutory provisions: The AD text does not itself cite specific Australian aviation statutes, penalty provisions, or administrative procedures by section number. It is an instrument issued by CASA and becomes effective on a stated date, but the AD does not recite the statutory authority or enforcement sections within the text provided. Practitioners seeking to trace the AD to enabling legislation would need to consult CASA’s enabling statutes and regulation frameworks outside the AD text. The AD text itself does not supply those cross-references.

No conflict resolution or precedence clause: The AD contains no express clause on how conflicts between the SB, later SB revisions, FAA ADs, or other CASA directives are to be resolved beyond the AMOC acceptance route. The operative effect is: follow SB500-26-02 Revision 1 to comply; you may follow later SB revisions only if they are FAA‑approved AMOCs to FAA AD 2007‑11‑17.

Practical effect of these interactions

• Operators who wish to rely on later SB revisions must check FAA records for AMOC approvals to see whether those revisions have been accepted as alternate methods. The AD delegates part of the approval function to FAA action.
• Maintenance standards and the legal duties under this AD are anchored to the SB text; other domestic regulatory instruments that define maintenance release, recordkeeping and certification are not repeated in the AD but will remain applicable in parallel.

The AD text records a short, explicit amendment and publication timeline embedded in its content and accompanying annotations. The items contained in the AD that constitute the amendment history are:

• Cessna Service Bulletin SB500-26-02 Original Issue dated 1 April 2005. The AD references this original issue in Requirement 1 as the baseline for previously accomplished actions that may need verification.
• Cessna Service Bulletin SB500-26-02 Revision 1 dated 7 July 2005. This Revision 1 is the operative technical standard that the AD requires operators to follow for installation of identification sleeves, reconnection and testing. It is the revision expressly named in the AD’s applicability and in Requirements 1 and 2.
• The AD document itself was signed by David Punshon, Delegate of the Civil Aviation Safety Authority, on 19 June 2007. The signature and date appear on the form of the AD in the text.
• The AD statement "This Airworthiness Directive becomes effective on 2 August 2007" sets the legal effective date two months after the signature date; that effective date is the operative date for compliance timelines (the 60-day calendar compliance window and the immediate effect of Requirement 4).
• The AD references FAA AD 2007-11-17 Amdt 39-15074. The AD does not reproduce the FAA AD text, but it ties acceptable AMOCs and later SB revisions to that FAA AD's AMOC process.

No other amendments, revocations, or supersessions are recorded within the AD text provided. The AD allows subsequent SB revisions to be used for compliance only if the FAA has approved those revisions as AMOCs to the referenced FAA AD. In other words, amendment history relevant to compliance comprises the original SB, Revision 1, and any later SB revisions that receive FAA AMOC approval. The AD text itself contains no record of subsequent CASA amendments to this Directive, nor does it list any administrative variation or exemption mechanisms.

For practitioners maintaining records of regulatory instruments, the concrete dates you can cite from the AD are:

• SB original issue: 1 April 2005 (referenced)
• SB Revision 1: 7 July 2005 (operative standard referenced)
• AD signed: 19 June 2007 (signature date)
• AD effective date: 2 August 2007

The AD does not state whether the AD replaces prior CASA directives on the same topic, nor does it contain a footnote of amendment versions to this AD itself. Any later CASA action (variation, extension, rescission) would need to be located outside the AD text provided here.

The AD text contains no reference to litigation, appeals, cases, or judicial review related to this Directive. There are no court decisions, administrative appeals, or enforcement cases recorded in the provided text. The only legal or quasi-legal references are to FAA AD 2007-11-17 Amdt 39-15074 and to the Cessna service bulletins identified (SB500-26-02 original issue and Revision 1).

Therefore, based solely on the AD’s content:

• There are no litigated disputes, recorded injunctions, or judicial interpretations referenced in the instrument.
• The AD does not report any prior appeals or challenges to its issuance.
• The AD does not provide procedural guidance on appealing the Directive, or on seeking judicial review; such mechanisms, if available, would lie outside the document and within the broader statutory framework governing CASA decisions.

Practitioners seeking litigation history or case law concerning this AD must consult court records, administrative tribunal decisions or CASA records external to the AD text. The AD itself includes no such history or reference and contains no mention of prior or subsequent legal proceedings.

The AD’s compact text contains several points that are easy to overlook but are critical for operational compliance. These are drawn verbatim or by strict inference from the Directive language; the text is explicit in these respects, and practitioners should note them carefully.

1. Applicability is SB‑defined, not model‑only: The AD applies to "Cessna Model 500 and 501 aeroplanes as identified in Cessna Service Bulletin (SB) SB500-26-02 Revision 1 dated 7 July 2005." Do not assume every Model 500/501 is captured; applicability depends on identification criteria within the SB. You must consult the SB to determine whether a particular airframe is included.

2. Requirement 4 is immediately effective: The AD states "Fire extinguisher bottles may not be installed as replacement spares on any Cessna Model 500 or 501 aeroplanes unless identification sleeves have been installed on the wires for the positive and negative terminal studs in accordance with Requirement 1." The Compliance section states Requirement 4 is effective "As of the effective date of this Directive." That means from the AD effective date (2 August 2007) forward, substitution of spares without sleeves is prohibited.

3. Beware the combined time/cycle deadline: Requirements 1 and 2 must be completed "Within 100 hours time in service (TIS) or 60 days after the effective date of this Directive, whichever occurs first." Practically that means if an aircraft will reach 60 days before accumulating 100 flight hours, the 60‑day calendar deadline is decisive; if it logs 100 hours TIS in fewer than 60 days, the 100‑hour TIS deadline governs. Operators must compute both and comply with the earlier.

4. Verification can ground the aircraft until corrected: Requirement 2 requires verification for aircraft that have had the original SB work done; Requirement 3 mandates that "If any non-conforming wiring changes are discovered during the Requirement 2 verification, correct the wiring changes as applicable to conform to the changes described in, Revision 1." The Compliance section states Requirement 3 must be done "Before further flight after the Requirement 2 verification inspection." Therefore verification may uncover defects that must be corrected before flight, potentially resulting in immediate grounding and the need for maintenance resources.

5. Reconnect and repeat testing language: Requirement 1 requires not only reconnection to the correct studs but also testing the connection and "re-connect the wires again as applicable until the connection tests correctly." The AD therefore contemplates an iterative testing and reconnection process until the test criteria are satisfied. The SB’s specific test procedure controls what counts as a correct test, so adherence to the SB is essential.

6. AMOC dependence on FAA approvals: The AD permits later revisions of SB500-26-02 only if "approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-11-17." That means reliance on later SB revisions requires verification that the FAA has granted AMOC status to that revision relative to FAA AD 2007‑11‑17. CASA’s AD does not itself assert that later revisions are acceptable absent FAA AMOC approval; operators must confirm FAA AMOC status before assuming a later SB revision satisfies the CASA AD.

7. No specified recordkeeping or reporting in the AD text: The Directive prescribes actions and timelines but does not specify the form or content of records, nor whether findings or corrections must be reported back to CASA or Cessna. If an operator's internal or national regulatory processes require maintenance records, those obligations must be met separately; they are not detailed in the AD.

8. The AD’s background note frames risk but does not quantify it: The AD states the FAA received reports of mis-wired bottles and that the Directive is issued "to ensure that the fire extinguishing bottles are activated in the event of an engine and that flammable fluids are not supplied during a fire, which could result in an unextinguished fire in the nacelle." The AD does not provide a list of incident reports, occurrence counts, or empirical risk measures; the background provides the safety rationale but not operational statistics.

9. No explicit CASA approval of AMOCs included: The AD does not state that CASA will accept AMOCs approved by other authorities beyond the FAA or that CASA will independently review AMOCs. The text ties acceptable alternative compliance directly to FAA AMOC approvals relative to FAA AD 2007‑11‑17. Practitioners should not assume automatic acceptance of other foreign authority approvals.

10. The AD references FAA AD 2007-11-17: The AD does not reproduce the FAA AD’s content; it simply refers to it. To understand the exact relationship between the FAA AD, possible AMOCs, and the SB revisions, you must consult FAA AD 2007‑11‑17 and associated FAA AMOC records.

The AD makes compliance straightforward in concept: follow SB500-26-02 Revision 1 for the specified tasks within the stated timeframes, verify previously completed work for conformity, correct non-conformities before flight, and do not fit replacement bottles without identification sleeves. Below is a practical compliance checklist distilled from the AD wording, with procedural and timeline steps cited to the AD requirements.

Preparatory steps

1. Determine applicability: Obtain Cessna SB500-26-02 Revision 1 (dated 7 July 2005) and confirm whether the particular aircraft is listed or otherwise identified in the SB as subject to the instruction. The AD’s Applicability clause ties the AD to aircraft "as identified in Cessna Service Bulletin SB500-26-02 Revision 1 dated 7 July 2005." Do not rely solely on model number; consult the SB.

2. Review maintenance history: Check aircraft maintenance records to see whether the wiring changes were previously accomplished under SB500-26-02 Original Issue (1 April 2005) or any later revision. If prior work was done under the original SB, Requirement 2 applies.

Primary compliance tasks (per the AD Requirements)

3. Requirement 1 action plan (if not previously accomplished in accordance with the original SB):

   • Procure identification sleeves specified in SB500-26-02 Revision 1.
   • Install identification sleeves on the wires for the positive and negative terminal studs of each engine fire extinguishing bottle in accordance with the SB.
   • Re-connect wires to the correct terminal studs as specified in the SB.
   • Perform the connection test procedure required by the SB. If the test shows improper connection, re-connect and test again "as applicable until the connection tests correctly," using the SB’s criteria for a passing test.
   • Complete these steps "Within 100 hours TIS or 60 days after the effective date of this Directive, whichever occurs first." The AD effective date is 2 August 2007, so calculate 60 days from that date and/or 100 TIS hours from the aircraft’s TIS.

4. Requirement 2 action plan (where SB original issue work has previously been done):

   • Verify that the wiring changes previously accomplished under SB500-26-02 Original Issue conform to the changes described in SB500-26-02 Revision 1. The AD requires this verification for aeroplanes on which the actions of the original SB were already performed before the effective date.
   • Conduct the verification inspection "Within 100 hours TIS or 60 days after the effective date ... whichever occurs first."

5. Requirement 3 corrective action (if non-conformance is found during Requirement 2 verification):

   • If any non-conforming wiring changes are discovered, correct the wiring changes "as applicable to conform to the changes described in, Revision 1."
   • Complete these corrections "Before further flight after the Requirement 2 verification inspection." Do not release the aircraft to service for flight until corrections are properly made and re-tested per the SB.

6. Requirement 4 spares restriction:

   • From the AD effective date forward (2 August 2007), do not install fire extinguisher bottles as replacement spares on any applicable aircraft unless the identification sleeves have been installed on the positive and negative terminal wires in accordance with Requirement 1. That is an immediate operational prohibition until sleeves are fitted.

Acceptable alternatives and documentation

7. Alternative SB revisions: Later revisions of SB500-26-02 may be used for compliance only if they are "approved by the United States Federal Aviation Administration (FAA) as an Alternate Method of Compliance (AMOC) to FAA AD 2007-11-17." If you intend to rely on a later SB revision, obtain written evidence of the FAA AMOC approval for that revision and retain this evidence as part of the compliance file, since the AD makes acceptance conditional on FAA action.

8. Testing and sign-off: The AD requires that testing be carried out until the connection tests correctly. Ensure that maintenance personnel follow the SB’s specified test procedure and record the outcomes of the initial test, any re-connections and subsequent tests showing correct connection. The AD does not specify a particular sign-off form; maintain traceable maintenance records consistent with usual regulatory requirements.

9. Timing and scheduling: Because Requirements 1 and 2 are limited to "Within 100 hours TIS or 60 days ... whichever occurs first," schedule the work to meet the earlier trigger. For aircraft close to the 60‑day calendar limit, plan maintenance slots accordingly. Also plan for the possibility that verification (Requirement 2) could reveal non‑conformities requiring corrective work that must be completed before further flight.

10. Parts logistics: Requirement 4 creates an immediate limitation on installing replacement bottles without sleeves. Ensure that spares inventories, maintenance procedures and supply chains account for the need to fit identification sleeves before installing bottles as spares; this may require ordering sleeves in advance or scheduling co‑ordinated replacement work.

Record-keeping and evidence of compliance

11. Maintain records of:

• The SB revision used (SB500-26-02 Revision 1 or a later SB revision accompanied by FAA AMOC approval).
• Dates and signatures of the maintenance personnel performing installations, verifications and corrective actions.
• Test results showing initial test failure (if any), reconnection attempts and final passing test.
• Evidence of FAA AMOC approval where a later SB revision is relied upon.

The AD text does not specify the exact form of recordkeeping; the above is a best practice inferred from the AD’s procedural expectations and from standard maintenance record duties. The AD itself does not command reporting to CASA of findings or corrections.

When in doubt

12. If there is uncertainty about whether an aircraft is captured by the SB, whether a particular SB revision is acceptable, or whether a technical step in the SB fulfils the AD’s requirement, consult the text of SB500-26-02 Revision 1 and the referenced FAA AD 2007‑11‑17. For reliance on later SB revisions, obtain the FAA AMOC approval documentation for the specific SB revision relied upon.

13. If you require formal acceptance of an alternative method of compliance beyond what the AD permits, that option is not described in the AD text. Any further application for alternative compliance or waiver would need to follow the regulatory processes available under CASA or the relevant regulatory framework; the AD itself does not include those procedural paths.

Summary compliance checklist (short)

• Check SB500-26-02 Revision 1 applicability to the airframe.
• If not previously done: fit identification sleeves, reconnect to correct studs, test until pass, within 100 TIS hours or 60 days.
• If original SB work done: verify conformance to Revision 1 within 100 TIS hours or 60 days.
• If non-conforming wiring found: correct to Revision 1 before further flight.
• Do not install replacement fire bottles without sleeves effective 2 August 2007.
• If using a later SB revision, confirm FAA AMOC approval to FAA AD 2007‑11‑17 and retain proof.

Compliance must be demonstrable by maintenance records and by adherence to the SB’s test criteria; the AD makes the SB the operative technical standard and ties acceptance of later revisions to FAA AMOC approvals.