{"id":"F2006B03185","name":"AD/B747/291 - Nose Wheel Well Panel Rivets","slug":"ad-b747-291-nose-wheel-well-panel-rivets","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42557,"registerId":"commonwealth-F2006B03185-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.001.png)\n\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 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\nBoeing 747 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/B747/291 Nose Wheel Well Panel Rivets","sectionType":"part","heading":"AD/B747/291 Nose Wheel Well Panel Rivets 8/2003","content":"# AD/B747/291 Nose Wheel Well Panel Rivets 8/2003\n\nApplicability: Model 747-400 and \\-400F series aircraft, line numbers 1141 through 1183. Requirement: Action in accordance with the technical requirements of FAA AD 2003-10-09 Amdt\n\n39-13154.\n\nNote: Boeing Alert Service Bulletin 747-53A2472, including Appendix A refers.\n\nCompliance: As specified in the Requirement document, with a revised effective date of 7 August 2003.\n\nThis Airworthiness Directive becomes effective on 7 August 2003.\n\nBackground: The FAA requires inspection of the rivets in the forward, top, and side panels of the nose wheel well for discrepancies; and eventual terminating action. Discrepancies of rivets in the nose wheel well panels due to incorrect heat treatment, could result in failure of the rivets and consequent reduced structural integrity of the panels, and possible rapid depressurisation of the aircraft.\n\n![Signature of David Punshon, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Punshon\n\nDelegate of the Civil Aviation Safety Authority 27 June 2003\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 16 July 2003.","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":3,"scope_assessment":{"changed":false,"description":"The AD adopts the FAA's technical requirements for a defined subset of Boeing 747-400/400F airframes (line numbers 1141–1183) and sets an Australian effective date (7 August 2003). It does not expand or narrow the technical actions beyond those referenced; it applies FAA-mandated inspections and terminating action to the listed aircraft within Australia."},"complexity_factors":["Cross-reference to FAA AD 2003-10-09 as the mandatory technical Requirement (Requirement) — implementers must obtain and follow an external AD.","Reference to Boeing Alert Service Bulletin 747-53A2472 (Note) including Appendix A — additional external technical material required to comply.","Narrow, line-numbered Applicability (Model 747-400 and -400F, line numbers 1141–1183) — simplifies who is affected but requires operators to check airframe lineage.","Compliance timing specified via a revised effective date of 7 August 2003 (Compliance) — creates a fixed start date for obligations.","Regulatory provenance: issued under CASR subreg 39.1(1) by a CASA delegate (opening paragraph and signature) — shows delegated administrative authority for the AD.","Operational/compliance burden: requires inspections and a terminating corrective action (Requirement + Background) — imposes direct maintenance costs and scheduling on affected operators.","Safety-critical consequence described (Background: possible rapid depressurisation) — increases urgency and may affect prioritisation of maintenance resources.","Implementation detail omission: the AD mandates compliance 'in accordance with' the FAA AD and service bulletin but does not reproduce technical procedures, increasing reliance on those documents."],"plain_english_summary":"This Airworthiness Directive requires operators of Boeing 747-400 and 747-400F aircraft (line numbers 1141–1183) to inspect rivets in the forward, top and side panels of the nose wheel well and carry out corrective (terminating) repairs following the technical requirements of FAA AD 2003-10-09 and Boeing Alert Service Bulletin 747-53A2472. It matters because incorrect rivet heat treatment can cause rivet failure, weakening panels and risking rapid depressurisation, so affected operators must meet the mandated inspection and repair schedule (effective 7 August 2003)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific manufacturing defect in a limited production run of Boeing 747 aircraft. The reference to external FAA documentation is standard practice for Australian aviation safety directives and does not represent scope creep."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (model series and line numbers)","Single requirement referencing external technical document (FAA AD)","No nested conditions or exceptions","No cross-references to other legislation beyond the single FAA AD citation","Straightforward compliance timeline (single effective date)"],"plain_english_summary":"This Airworthiness Directive mandates inspection and eventual replacement of incorrectly heat‑treated rivets in the nose wheel well of Boeing 747-400 and 747-400F aircraft (line numbers 1141–1183). It affects operators and maintenance organizations of those specific aircraft because rivet failure could weaken nose‑wheel-well structure and, in the worst case, lead to rapid cabin depressurisation. Compliance follows FAA AD 2003‑10‑09 and Boeing Alert Service Bulletin 747‑53A2472; it took effect 7 August 2003."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-291-nose-wheel-well-panel-rivets","history":"/api/acts/ad-b747-291-nose-wheel-well-panel-rivets/history","analysis":"/api/acts/ad-b747-291-nose-wheel-well-panel-rivets/analysis","conflicts":"/api/acts/ad-b747-291-nose-wheel-well-panel-rivets/conflicts","importantCases":"/api/acts/ad-b747-291-nose-wheel-well-panel-rivets/important-cases","documents":"/api/acts/ad-b747-291-nose-wheel-well-panel-rivets/documents"}}