{"id":"F2006B03001","name":"AD/B747/100 Amdt 1 - Brake Wear Limit","slug":"ad-b747-100-amdt-1-brake-wear-limit","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42360,"registerId":"commonwealth-F2006B03001-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B747/100 Amdt 1 - Brake Wear Limit","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBoeing 747 Series Aeroplanes\n\nAD/B747/100\n\nAmdt 1\n\n  \nBrake Wear Limit 1/93\n\nApplicability: Model 747 series, equipped with brake part number identified in paragraph (a) and (b) of the Requirement Document.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 92-18-12 Amdt 39- 8357.\n\nCompliance: As specified in the requirement document with a revised effective date of 7 January 1993 for Australian Registered Aircraft.\n\nBackground: An investigation by the FAA of a runway excursion by a transport category aircraft following a rejected takeoff, has revealed that the majority of brake assemblies were near the current maximum wear limit and unable to absorb the required energy. This Directive required new maximum brake wear limits. Amendment 1 is issued to reflect the requirements of the latest issue of the relevant FAA Directive which requires the inspection for wear, and replacement or rework, of certain additional landing gear brakes that were not listed in the previous AD issue.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The original AD (1/93) was expanded via Amendment 1 to cover 'certain additional landing gear brakes that were not listed in the previous AD issue.' This represents a modest expansion of scope to capture brake assemblies initially omitted from the safety mandate."},"complexity_factors":["Very short document (under 300 words)","Only 4 structural sections (Applicability, Requirement, Compliance, Background)","Single cross-reference to FAA AD 92-18-12 Amdt 39-8357 (external technical standard)","No defined terms section — relies on external technical documentation","Simple conditional logic: if aircraft has specific brake part numbers, then compliance required","No nested exceptions or complex procedural requirements in the text itself"],"plain_english_summary":"This Airworthiness Directive mandates inspection and, if needed, repair or replacement of specific brake assemblies on Australian‑registered Boeing 747s and imposes stricter wear limits. It responds to a runway excursion where brakes that met old limits still couldn’t absorb required energy, and it expands the original order to cover additional brake types. Affected owners/operators must comply by 7 January 1993."},"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":true,"description":"Amendment 1 broadens the original directive by adding additional landing‑gear brake assemblies to the inspection/rework/replacement requirement and sets a revised effective date for Australian‑registered aircraft, thereby increasing the number of affected components and operators' compliance obligations."},"complexity_factors":["Cross-reference to FAA AD 92‑18‑12 requires operators to follow an external technical document for detailed procedures.","Applicability limited to 747s with brake part numbers listed in the Requirement Document (paragraphs (a) and (b))—necessitates accurate parts identification and record checks.","Required actions include inspection and either replacement or rework of brake assemblies—creates operational downtime, maintenance scheduling and direct costs to operators.","Amendment expands the list of affected landing gear brakes compared with the previous AD, increasing fleet coverage and potential supply/parts impact.","Revised effective date (7 January 1993 for Australian aircraft) imposes a compliance timeline that operators must meet.","Safety‑critical performance standard (brakes must absorb required energy) means technical judgements, qualified personnel and documented evidence are needed for compliance.","Dependence on a Requirement Document for exact part lists and on FAA technical specifications can create ambiguity or reliance on overseas documentation for enforcement."],"plain_english_summary":"This amendment requires inspection and, where needed, rework or replacement of specified brake assemblies on Boeing 747 series aeroplanes so they meet new maximum wear limits, by adopting the technical requirements of FAA AD 92‑18‑12. It applies to Australian‑registered 747s fitted with the listed brake part numbers and sets a revised effective date of 7 January 1993. Operators must carry out the inspections and any repairs or replacements and will bear the associated costs; the rule aims to reduce the risk of runway excursions following rejected takeoffs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-100-amdt-1-brake-wear-limit","history":"/api/acts/ad-b747-100-amdt-1-brake-wear-limit/history","analysis":"/api/acts/ad-b747-100-amdt-1-brake-wear-limit/analysis","conflicts":"/api/acts/ad-b747-100-amdt-1-brake-wear-limit/conflicts","importantCases":"/api/acts/ad-b747-100-amdt-1-brake-wear-limit/important-cases","documents":"/api/acts/ad-b747-100-amdt-1-brake-wear-limit/documents"}}