{"id":"F2007L02130","name":"AD/CESSNA 500/30 - Engine Fire Bottle Wiring","slug":"ad-cessna-500-30-engine-fire-bottle-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":67287,"registerId":"commonwealth-F2007L02130-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 500 (Citation) Series Aeroplanes","sectionType":"division","heading":"Cessna 500 (Citation) Series Aeroplanes","content":"### Cessna 500 (Citation) Series Aeroplanes\n\n| AD/CESSNA 500/30 | Engine Fire Bottle Wiring | 8/2007 |\n| ---------------- | ------------------------- | ------ |\n\n| Applicability: | Cessna Model 500 and 501 aeroplanes as identified in Cessna Service Bulletin (SB) SB500-26-02 Revision 1 dated 7 July 2005.                                                                                                                                                                                                                                                                                                                                                  |\n| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | 1. If not previously accomplished in accordance with Cessna SB500-26-02 Original Issue dated 1 April 2005, install identification sleeves on the wires for the positive and negative terminal studs of the engine fire extinguishing, re-connect the wires to the correct studs; test the connection and re-connect the wires again as applicable until the connection tests correctly. The above actions are to be accomplished in accordance with SB500-26-02, Revision 1. |\n|                | 2. For aeroplanes on which the actions specified in SB500-26-02 have been accomplished before the effective date of this Directive - Verify that wiring changes previously accomplished in accordance with SB500-26-02 conforms to the changes described in SB500-26-02, Revision 1.                                                                                                                                                                                         |\n|                | 3. 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.                                                                                                                                                                                                                                                                                   |\n|                | 4. 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.                                                                                                                                                                                                              |\n|                | 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.                                                                                                                                                                                                       |\n|                | Note: FAA AD 2007-11-17 Amdt 39-15074 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                |\n| Compliance:    | For Requirements 1 and 2 - Within 100 hours time in service (TIS) or 60 days after the effective date of this Directive, whichever occurs first.                                                                                                                                                                                                                                                                                                                             |\n|                | For Requirement 3 - Before further flight after the Requirement 2 verification inspection.                                                                                                                                                                                                                                                                                                                                                                                   |\n|                | For Requirement 4 - As of the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                                                              |\n\n|             | This Airworthiness Directive becomes effective on 2 August 2007.                                                                                                                                                                                                                                            |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Background: | The FAA has received reports of mis-wired fire extinguishing bottles. This 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. |\n\n![](image.001.png)  \nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n19 June 2007","sortOrder":0},{"sectionNumber":"AD/CESSNA 500/30","sectionType":"part","heading":"AD/CESSNA 500/30","content":"## AD/CESSNA 500/30","sortOrder":1},{"sectionNumber":"Engine Fire Bottle Wiring","sectionType":"part","heading":"Engine Fire Bottle Wiring","content":"## Engine Fire Bottle Wiring","sortOrder":2},{"sectionNumber":"8/2007","sectionType":"part","heading":"8/2007","content":"## 8/2007","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"The Directive not only mandates the installation and testing of identification sleeves and correct wiring (Requirement 1) but also compels verification of any prior SB-compliant work and immediate correction of non-conformances discovered during that verification (Requirements 2–3). It additionally prohibits fitting replacement fire bottles unless the identification sleeves are installed (Requirement 4). The AD therefore tightens and formalises compliance and spare-part controls beyond merely issuing the Service Bulletin, while accepting later FAA-approved SB revisions as alternate methods of compliance (Requirement text)."},"complexity_factors":["Multiple distinct actions: installation of identification sleeves, reconnection and iterative testing of wiring, verification of prior work, corrective action, and a prohibition on installing spare bottles (Requirements 1–4).","Applicability tied to aircraft identified in a specific Service Bulletin (SB500-26-02 Revision 1), creating a dependence on external technical documents (Applicability).","Cross-reference to both the original Service Bulletin and its Revision 1, plus acceptance of later SB revisions as FAA-approved AMOCs, adding regulatory interplay and version control risk (Requirement text).","Short and differing compliance windows: 100 hours TIS or 60 days for initial actions, immediate correction before further flight for discovered non-conformances, and immediate effect for the spare-bottle prohibition (Compliance).","Technical diagnostic requirement: iterative testing and re-connection until the connection tests correctly, which imposes procedural and competency demands on maintenance staff (Requirement 1).","Operational constraint on spare parts provisioning and maintenance practice — spares cannot be fitted unless modification is done (Requirement 4).","Enforcement hinge on inspection and verification of prior work, which may require record checks and potential rework (Requirement 2–3).","Safety rationale limited to preventing mis-activation or supplying flammable fluids during an engine fire, linking mechanical fixes to an operational risk that must be demonstrated by test and inspection (Background, Requirements)."],"plain_english_summary":"This Airworthiness Directive requires Cessna Model 500 and 501 operators to mark the positive and negative studs of engine fire extinguisher bottles with identification sleeves, ensure wiring is correctly connected and tested, verify any earlier wiring changes, correct non-conformances, and prohibit installing replacement bottles unless sleeves are fitted. It targets maintenance personnel and aircraft operators to make sure engine fire bottles operate correctly and that fuel lines are not energized during an engine fire (see Requirements 1–4 and Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard Airworthiness Directive maintaining its original narrow scope — addressing a specific wiring defect in specific aircraft models. The reference to FAA AD 2007-11-17 and acceptance of later SB revisions as AMOCs is standard harmonisation practice and does not expand the directive's substantive scope."},"complexity_factors":["Short, single-purpose directive with only 4 requirements","Minimal defined terms (only 'time in service' and standard aviation abbreviations like TIS, AMOC, FAA)","Clear conditional structure (if/then logic) but not nested deeply","Single cross-reference to a Cessna Service Bulletin and FAA AD","Straightforward compliance deadlines with simple alternatives (100 hours OR 60 days)","No exceptions to exceptions or complex deeming provisions"],"plain_english_summary":"This mandatory CASA Airworthiness Directive addresses a wiring hazard on Cessna 500/501 (Citation) jets: engine fire extinguisher bottles may be incorrectly wired, risking failure to extinguish an engine fire—or worse, feeding fuel to it. \n\nIt requires operators, maintenance personnel and parts suppliers to identify and correct bottle wiring using colour-coded sleeves, verify any previous repairs, and ban installation of non‑compliant replacement bottles before flight. Non‑compliance risks grounding and severe safety consequences."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-500-30-engine-fire-bottle-wiring","history":"/api/acts/ad-cessna-500-30-engine-fire-bottle-wiring/history","analysis":"/api/acts/ad-cessna-500-30-engine-fire-bottle-wiring/analysis","conflicts":"/api/acts/ad-cessna-500-30-engine-fire-bottle-wiring/conflicts","importantCases":"/api/acts/ad-cessna-500-30-engine-fire-bottle-wiring/important-cases","documents":"/api/acts/ad-cessna-500-30-engine-fire-bottle-wiring/documents"}}