{"id":"F2006B03123","name":"AD/B747/222 - Wing Front Spar Upper and Lower Chords","slug":"ad-b747-222-wing-front-spar-upper-and-lower-chords","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42495,"registerId":"commonwealth-F2006B03123-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/B747/222 Wing Front Spar Upper and Lo","sectionType":"part","heading":"AD/B747/222 Wing Front Spar Upper and Lower Chords 4/2000","content":"# AD/B747/222 Wing Front Spar Upper and Lower Chords 4/2000\n\nApplicability: Model 747-100 and \\-200 series aircraft, as listed in Boeing Service Bulletin (SB) 747- 57-2305 Revision 1, dated 21 January 1999.\n\nRequirement: As specified in the Requirement document for the initial and repetitive inspections, with a revised effective date of 20 April 2000.\n\nAccomplishment of “Part 2 - Terminating Action” of the Accomplishment Instructions of Boeing SB 747-57-2305 Revision 1, constitutes terminating action for the requirements of this Directive.\n\nNote: FAA AD 2000-03-01 Amdt 39-11558 refers.\n\nCompliance: As specified in the Requirement document for the initial and repetitive inspections, with a revised effective date of 20 April 2000.\n\nThis Airworthiness Directive becomes effective on 20 April 2000.\n\nBackground: The FAA received reports of cracks in the upper chord of the wing front spar. Such fatigue cracking could result in reduced structural capability and possible fuel leakage onto an engine and a resultant fire.\n\n![Signature of Bernard Malcolm Hole, Delegate of the Civil Aviation Safety Authority.](image.003.png)  \n\nBernard Malcolm Hole\n\nDelegate of the Civil Aviation Safety Authority 8 March 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 22 March 2000.","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":5,"scope_assessment":{"changed":false,"description":"The directive applies to the aircraft models listed in Boeing SB 747-57-2305 Revision 1 and requires actions as set out in the Requirement document with a revised effective date of 20 April 2000 (Applicability; Requirement; Compliance). The AD recognises a terminating action within the same service bulletin; it implements FAA-reported findings but does not, on its face, expand applicability or create additional categories of affected aircraft beyond those listed in the referenced service bulletin (Note; Accomplishment of “Part 2 - Terminating Action”)."},"complexity_factors":["Reliance on external technical documents (Boeing Service Bulletin 747-57-2305 Revision 1) for detailed inspection and modification instructions (Applicability; Requirement).","Two-tier compliance regime: mandatory initial/repetitive inspections plus an optional terminating modification that stops further inspections (Requirement; Accomplishment of “Part 2 - Terminating Action”).","Cross-reference to foreign regulator action (FAA AD 2000-03-01) which may require reading multiple regulatory texts to understand full obligations (Note).","Safety-critical structural subject matter (fatigue cracking of wing front spar upper chord) requiring specialised inspection capability and possible structural repair or modification (Background).","Specified effective and revised dates (20 April 2000) creating fixed compliance timelines that operators must meet (Compliance; Effective date).","Limited applicability defined by aircraft models listed in the service bulletin, requiring fleet-level identification and record checks to determine who is affected (Applicability).","Regulatory source and authority are specified (issued under subregulation 39.1(1) of CAR 1998 by CASA Delegate), indicating administrative finality with limited room for alternative compliance unless the AD or SB provides it (introductory paragraph; signature)."],"plain_english_summary":"This Airworthiness Directive orders owners/operators of Boeing 747-100 and -200 series aircraft listed in Boeing Service Bulletin 747-57-2305 Rev 1 to carry out specified initial and repetitive inspections of the wing front spar upper and lower chords, and allows a specified ‘Part 2 – Terminating Action’ modification to end the inspection requirement. It responds to reported cracking that could weaken structure and risk fuel leakage onto an engine and fire, and sets compliance dates and procedures."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope — addressing a specific structural fatigue issue in specific Boeing 747 models. It does not expand beyond the original safety purpose of detecting and preventing wing spar cracking."},"complexity_factors":["Short document (approximately 250 words)","Only 4 defined structural elements (wing front spar, upper chord, lower chord, terminating action)","Single cross-reference to Boeing Service Bulletin 747-57-2305 Revision 1 and FAA AD 2000-03-01","Simple conditional logic: repetitive inspections continue until terminating action completed","No nested exceptions or layered definitions","Clear applicability limited to specific aircraft models","Compliance dates referenced externally in 'Requirement document' rather than stated inline"],"plain_english_summary":"This safety order requires owners and operators of certain Boeing 747-100/200 aircraft (per Boeing Service Bulletin 747-57-2305 Rev 1) to inspect the wing front spar upper and lower chords for fatigue cracks, perform an initial check and repeat inspections until a Boeing Part 2 repair is installed (which terminates inspections). It responds to discovered spar fatigue that could weaken the wing, cause fuel leaks or fires. Effective 20 April 2000; aligns with FAA AD 2000-03-01."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b747-222-wing-front-spar-upper-and-lower-chords","history":"/api/acts/ad-b747-222-wing-front-spar-upper-and-lower-chords/history","analysis":"/api/acts/ad-b747-222-wing-front-spar-upper-and-lower-chords/analysis","conflicts":"/api/acts/ad-b747-222-wing-front-spar-upper-and-lower-chords/conflicts","importantCases":"/api/acts/ad-b747-222-wing-front-spar-upper-and-lower-chords/important-cases","documents":"/api/acts/ad-b747-222-wing-front-spar-upper-and-lower-chords/documents"}}