{"id":"F2008L02694","name":"AD/B717/29 - Airworthiness Limitations - Fuel System Safety","slug":"ad-b717-29-airworthiness-limitations-fuel-system-safety","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74752,"registerId":"commonwealth-F2008L02694-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 717 Series Aeroplanes","sectionType":"division","heading":"Boeing 717 Series Aeroplanes","content":"### Boeing 717 Series Aeroplanes\n\n| AD/B717/29 | Airworthiness Limitations - Fuel System Safety | 8/2008 |\n| ---------- | ---------------------------------------------- | ------ |\n\n| Applicability: | All Model 717-200 aeroplanes.                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Revise the Airworthiness Limitations (AWL) section of the Instructions for Continued Airworthiness (ICA) to incorporate the information specified in Appendixes B, C, and D of Report MDC-92K9145.                                                                                                                                                                                                                                                              |\n|                | Note 1: The term \"Report MDC-92K9145,'' as used in this Directive, means the Boeing Twinjet Special Compliance Items Report, MDC-92K9145, Revision G, dated 7 June 2007.                                                                                                                                                                                                                                                                                        |\n|                | Accomplishing the revision in accordance with a later revision of ReportMDC-92K9145 is an acceptable method of compliance if the revision is approved by the Manager, Los Angeles Aircraft Certification Office (ACO) of the United States Federal Aviation Administration (FAA).                                                                                                                                                                               |\n|                | After accomplishing the AWL revision specified above, no alternative inspections, inspection intervals, or Critical Design Configuration Control Limitations (CDCCL) may be used unless the inspections, intervals or CDCCLs are part of a later revision of Report MDC- 92K9145 that is approved by the Manager, Los Angeles ACO; or unless the inspections, intervals or CDCCLs are approved as an AMOC to FAA AD 2008-11-15 by the Manager, Los Angeles ACO. |\n|                | Note 2: FAA AD 2008-11-15 Amdt 39-15538 refers.                                                                                                                                                                                                                                                                                                                                                                                                                 |\n| Compliance:    | Before 16 December 2008.                                                                                                                                                                                                                                                                                                                                                                                                                                        |\n|                | This Airworthiness Directive becomes effective on 31 July 2008.                                                                                                                                                                                                                                                                                                                                                                                                 |\n\n| Background: | This Directive results from a design review of the fuel tank systems. The Directive is issued to prevent the potential for ignition sources inside fuel tanks caused by latent failures, alterations, repairs or maintenance actions, which, in combination with flammable fuel vapours, could result in a fuel tank explosion and consequent loss of the aeroplane. |\n| ----------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n13 June 2008","sortOrder":0},{"sectionNumber":"AD/B717/29","sectionType":"part","heading":"AD/B717/29","content":"## AD/B717/29","sortOrder":1},{"sectionNumber":"Airworthiness Limitations - Fuel System ","sectionType":"part","heading":"Airworthiness Limitations - Fuel System Safety","content":"## Airworthiness Limitations - Fuel System Safety","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The Directive applies only to all Model 717-200 aeroplanes and requires incorporation of specified fuel-system safety items from Boeing Report MDC-92K9145 into the AWL. It implements the FAA-related requirements and does not broaden applicability beyond that aircraft type or extend obligations outside the report's specified tasks (Applicability; Requirement; Note 1; Note 2)."},"complexity_factors":["External technical material required: mandates incorporation of Appendixes B, C and D of Boeing Report MDC-92K9145 (Revision G) into the AWL — compliance depends on understanding and implementing material outside the Directive (Requirement).","Cross-border approval and reliance: allows use of later revisions only if approved by the Manager, Los Angeles Aircraft Certification Office (ACO) of the FAA, creating dependency on a foreign authority for acceptable changes (Accomplishing the revision...).","Constraint on alternatives: prohibits alternative inspections, intervals or CDCCLs unless they appear in an approved later revision or are approved as an AMOC to FAA AD 2008-11-15, limiting operator flexibility and creating an approval gate (After accomplishing the AWL revision...).","Compliance timing: fixed deadline (before 16 December 2008) and effective date (31 July 2008) impose schedule pressure on operators and maintenance organisations to revise manuals and implement tasks (Compliance).","Implementation burden on maintenance programmes: requires updates to Instructions for Continued Airworthiness (ICA)/AWL, training, record-keeping and possible reprogramming of scheduled maintenance intervals (Requirement + Background).","Regulatory reference network: explicitly ties to FAA AD 2008-11-15 and the Boeing report, so interpreting obligations requires reading multiple instruments (Note 2; Note 1; Requirement).","Discretion concentrated in a single official: the Manager, Los Angeles ACO controls approval of later revisions or AMOCs, concentrating decision-making power and creating a single point for exceptions (Accomplishing the revision...).","Technical specificity vs. brevity: the Directive prescribes inclusion of detailed fuel-system safety tasks but does not reproduce them, so compliance requires transferring technical tasks accurately from the report into operator documentation (Requirement)."],"plain_english_summary":"Requires owners/operators of all Boeing 717-200 aeroplanes to update the Airworthiness Limitations (AWL) section of their maintenance instructions to include fuel-system safety tasks set out in Appendixes B–D of Boeing Report MDC-92K9145 (Rev G). It sets a firm compliance date and prevents using alternative inspections or intervals unless approved by the FAA Los Angeles ACO or as an FAA AMOC, so it directly affects maintenance programmes, inspection schedules and compliance records."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original, narrow scope. It addresses a specific safety issue (fuel tank ignition prevention) for a single aircraft type (Boeing 717-200) through a targeted maintenance documentation update. There is no evidence of scope creep; the directive precisely matches its stated purpose of implementing fuel system safety limitations following a design review."},"complexity_factors":["Single, specific technical requirement (revising one section of maintenance manuals)","Only one defined technical term ('Report MDC-92K9145') with clear reference to external document","Simple conditional logic: one acceptable alternative compliance path (later approved revisions)","Clear, single deadline with no tiered or graduated compliance dates","Limited cross-referencing (only to one FAA AD and one Boeing report)","Short document length (approximately 250 words of substantive content)","Narrow scope: applies only to one specific aircraft model"],"plain_english_summary":"This mandatory CASA Airworthiness Directive requires operators of Boeing 717-200 aircraft to update maintenance manuals by 16 December 2008 to incorporate Boeing’s fuel‑system airworthiness limits and inspections (MDC‑92K9145), using only approved methods. It targets airlines and maintenance organisations to reduce the risk of fuel‑tank ignition and catastrophic loss, aligning Australian actions with US FAA approvals."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b717-29-airworthiness-limitations-fuel-system-safety","history":"/api/acts/ad-b717-29-airworthiness-limitations-fuel-system-safety/history","analysis":"/api/acts/ad-b717-29-airworthiness-limitations-fuel-system-safety/analysis","conflicts":"/api/acts/ad-b717-29-airworthiness-limitations-fuel-system-safety/conflicts","importantCases":"/api/acts/ad-b717-29-airworthiness-limitations-fuel-system-safety/important-cases","documents":"/api/acts/ad-b717-29-airworthiness-limitations-fuel-system-safety/documents"}}