{"id":"F2006B01933","name":"AD/A320/42 Amdt 1 - Brake Wear Limits","slug":"ad-a320-42-amdt-1-brake-wear-limits","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41155,"registerId":"commonwealth-F2006B01933-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/A320/42 Amdt 1 - Brake Wear Limits","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/A320/42 and issues the following AD under subregulation 39.1 (1) of CASR 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.\n\n![](image.001.png)  \n\nAirbus Industrie A319, A320 and A321 Series Aeroplanes\n\nAD/A320/42\n\nAmdt 1\n\n  \nBrake Wear Limits 1/2004\n\nApplicability: Model A320 series aircraft equipped with Messier-Bugatti, BFGoodrich, Allied Signal Aerospace Company (Bendix), or Aircraft Braking Systems brakes; as specified in FAA AD 97-02-04.\n\nRequirement: 1. Inspect, and replace the main landing gear brakes where necessary, in accordance with the appropriate maximum wear limits specified in FAA AD 97-02-04.\n\n2. Incorporate the appropriate wear limits into the aircraft’s approved system of maintenance.\n\nCompliance: Prior to 30 August 1995.\n\nThe compliance time remains unchanged by this issue. This Amendment becomes effective on 22 January 2004.\n\nBackground: This Directive was raised to ensure there is no loss of brake effectiveness during a high energy rejected take-off (RTO).\n\nAmendment 1 is issued to clarify applicability and to introduce the current FAA AD.\n\nThe original issue of this Airworthiness Directive became effective on 30 August 1995.\n\n![](image.002.png)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 1 December 2003\n\n![](image.001.png)\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 24 December 2003.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment remains tightly scoped to its original purpose of ensuring brake effectiveness during rejected take-offs. The amendment merely clarifies applicability and updates the reference to the corresponding FAA directive without expanding the substantive requirements or covered aircraft population."},"complexity_factors":["Single page document with minimal structural sections","Only 4 defined elements: applicability, requirement, compliance, and background","No nested conditional logic or cross-references to other legislation beyond a single reference to FAA AD 97-02-04","Straightforward imperative requirements ('inspect and replace', 'incorporate')","Retrospective compliance date creates no ongoing calculation burden","No exceptions, exemptions, or alternative compliance pathways specified"],"plain_english_summary":"This CASA safety notice targets Airbus A319/A320/A321 aircraft fitted with specific Messier‑Bugatti, BFGoodrich, Allied Signal/Bendix, or Aircraft Braking Systems main landing‑gear brakes. It requires inspection and replacement where wear exceeds specified limits and updating the maintenance manual so those limits are recorded. The measures—retrospectively due by 30 August 1995—aim to prevent brake failure during high‑speed rejected take‑offs. Amendment 1 (Jan 2004) clarifies applicability and cites FAA AD 97‑02‑04 without changing the deadline."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"Amendment 1 clarifies which A320‑series aeroplanes and brake makes are covered and updates the AD to introduce the current FAA AD (Background: \"clarify applicability and to introduce the current FAA AD\"). The core requirements — inspect/replace to FAA wear limits and record the limits in the approved maintenance system — and the compliance deadline remain unchanged (Requirement; Compliance). Therefore the amendment refines applicability and source reference but does not materially expand or narrow the AD’s substantive scope."},"complexity_factors":["Cross‑reference to external FAA AD 97‑02‑04 for the substantive wear limits (Requirement) — requires consulting another instrument for operative criteria.","Multiple brake manufacturers listed in Applicability (Messier‑Bugatti, BFGoodrich, Allied Signal/Bendix, Aircraft Braking Systems) — variety of equipment and part‑specific limits.","Obligation to incorporate limits into the aircraft’s approved system of maintenance (Requirement) — changes maintenance programs and documentation.","Compliance deadline precedes amendment effective date (Compliance: Prior to 30 August 1995 vs Amendment effective 22 January 2004) — creates retrospective compliance/enforcement complexity.","Revocation and reissue of the prior AD (Background) — legal continuity and record‑keeping implications for operators and regulators.","Limited technical detail in the AD itself (Requirement) — the AD delegates substantive technical thresholds to the FAA document rather than reproducing them.","Centralised issuance by CASA delegate under CASR subregulation 39.1(1) — clear legal authority but limited room for operator discretion."],"plain_english_summary":"Owners/operators of Airbus A319/A320/A321 aeroplanes fitted with specified Messier‑Bugatti, BFGoodrich, Bendix or Aircraft Braking Systems brakes must inspect main landing‑gear brakes, replace any that exceed the maximum wear limits adopted from FAA AD 97‑02‑04, and record those limits in the approved maintenance system. The directive assigns inspection, replacement and maintenance‑record tasks (and their costs) to operators; the amendment clarifies applicability and incorporates the current FAA AD."}},"importantCases":[],"_links":{"self":"/api/acts/ad-a320-42-amdt-1-brake-wear-limits","history":"/api/acts/ad-a320-42-amdt-1-brake-wear-limits/history","analysis":"/api/acts/ad-a320-42-amdt-1-brake-wear-limits/analysis","conflicts":"/api/acts/ad-a320-42-amdt-1-brake-wear-limits/conflicts","importantCases":"/api/acts/ad-a320-42-amdt-1-brake-wear-limits/important-cases","documents":"/api/acts/ad-a320-42-amdt-1-brake-wear-limits/documents"}}