{"id":"F2006B03309","name":"AD/B767/128 - Thrust Reverser Auxiliary Track Assembly","slug":"ad-b767-128-thrust-reverser-auxiliary-track-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42746,"registerId":"commonwealth-F2006B03309-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.002.png)\n\n![](image.002.png)  \nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.","sortOrder":0},{"sectionNumber":"AD/B767/128 Thrust Reverser Auxiliary Tr","sectionType":"part","heading":"AD/B767/128 Thrust Reverser Auxiliary Track Assembly 12/2000","content":"# AD/B767/128 Thrust Reverser Auxiliary Track Assembly 12/2000\n\nApplicability: Boeing 767-200 and \\-300 series aircraft powered by Pratt and Whitney PW4000 engines, line numbers 1 through 646 inclusive.\n\nRequirement: 1. Carry out initial and repetitive inspections of the thrust reverser auxiliary beam assemblies in accordance with the technical instructions in FAA AD 2000-11-28, Paragraph (a). Repair or replace discrepant parts prior to further flight.\n\n2. Incorporate improved liner and slider assemblies in accordance with the technical instructions in FAA AD 2000-11-28, either Paragraph (b) or (c), as applicable.\n\nCompliance with Requirement 2 of this Directive constitutes terminating action for the inspections specified in Requirement 1 for each modified beam assembly.\n\nNote: Boeing Alert Service Bulletin 767-78A0079, Revision 2 refers.\n\nCompliance: 1. As detailed in the Requirement document with the effective date revised to 30 November 2000.\n\n2. No later than the respective period specified in the Requirement document. This Airworthiness Directive becomes effective on 30 November 2000\n\nBackground: Excessive wear in the thrust reverser auxiliary track beam assemblies can lead to disengagement of a slider and separation of a portion of the thrust reverser.\n\nLiberation of thrust reverser parts could damage the aircraft structure or pose a hazard to persons on the ground.\n\n![Signature of Eugene Paul Holzapfel, Delegate of the Civil Aviation Safety Authority.](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 24 October 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 1 November 2000.","sortOrder":1}],"analysis":{"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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The AD addresses the unsafe condition described (excessive wear leading to slider disengagement) by mandating inspections, corrective repairs prior to further flight, and retrofit of improved liners/sliders as terminating action. The applicability and required actions align with the instrument's stated purpose and do not expand scope beyond the aircraft/engine/line-number limits set in the AD."},"complexity_factors":["Cross-references external FAA AD 2000-11-28 and Boeing Alert Service Bulletin 767-78A0079 (Revision 2), requiring operators to consult and follow other technical documents.","Dual obligations: repetitive inspections plus an optional/required modification that acts as terminating action for inspections.","Specific applicability limited by aircraft model, engine type and line numbers (Boeing 767-200/-300 with PW4000, line numbers 1–646).","Immediate operational constraint: repairs or replacements must be completed prior to further flight, creating potential downtime and logistical planning.","Compliance timing set by the referenced Requirement document with an effective date (30 November 2000), so operators must track deadlines in external documents.","Technical judgement required to perform inspections and determine discrepant parts and appropriate repairs or replacements."],"plain_english_summary":"Requires operators of Boeing 767-200/300 aircraft with Pratt & Whitney PW4000 engines (line numbers 1–646) to perform initial and repeated inspections of thrust reverser auxiliary track beam assemblies, repair or replace any defects before further flight, and install improved liner/slider assemblies as specified. The stated purpose is to prevent excessive wear that can allow slider disengagement and release of thrust reverser parts, which could damage the aircraft or endanger people on the ground."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific mechanical wear issue on a defined subset of Boeing 767 aircraft. It does not expand beyond the original safety purpose of preventing thrust reverser separation."},"complexity_factors":["Short, single-purpose directive (approximately 400 words)","Only 4 defined applicability criteria (aircraft model, engine type, line number range)","Simple two-part requirement structure (inspect/replace)","Cross-references to external technical documents (FAA AD 2000-11-28 and Boeing Service Bulletin) rather than embedding complex technical specifications","No nested exceptions or conditional logic — compliance is straightforward with clear terminating action","Single background rationale with clear causal chain (wear → disengagement → separation → hazard)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections (and eventual replacement) of thrust reverser auxiliary track assemblies on Boeing 767-200/300s with Pratt & Whitney PW4000 engines (line numbers 1–646). It responds to excessive wear that can let a slider disengage and cause reverser parts to separate, risking aircraft damage or ground injury. Affected operators and maintenance organisations must follow the FAA’s inspection schedule and fit improved liner/slider assemblies to stop repetitive checks."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-128-thrust-reverser-auxiliary-track-assembly","history":"/api/acts/ad-b767-128-thrust-reverser-auxiliary-track-assembly/history","analysis":"/api/acts/ad-b767-128-thrust-reverser-auxiliary-track-assembly/analysis","conflicts":"/api/acts/ad-b767-128-thrust-reverser-auxiliary-track-assembly/conflicts","importantCases":"/api/acts/ad-b767-128-thrust-reverser-auxiliary-track-assembly/important-cases","documents":"/api/acts/ad-b767-128-thrust-reverser-auxiliary-track-assembly/documents"}}