{"id":"F2006B02674","name":"AD/B727/152 Amdt 1 - Rear Spar Web Between Right and Left BBL 40","slug":"ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41990,"registerId":"commonwealth-F2006B02674-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/152 Amdt 1 - Rear Spar Web Between Right and Left BBL 40","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)  \n![](image.002.png)  \nBoeing 727 Series Aeroplanes\n\nAIRWORTHINESS 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 revokes Airworthiness Directive (AD) AD/B727/152 and issues the following 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.\n\nAD/B727/152\n\nAmdt 1\n\n  \nRear Spar Web Between Right and Left BBL 40 11/2000\n\nApplicability: Model 727 series aircraft with line numbers 858 through 864, 867 through 869, 872\n\nthrough 883, and 885 through 1832.\n\nRequirement: Inspect in accordance with the technical requirements of FAA AD 2000-14-07 Amdt 39-11816.\n\nNote: Boeing Alert Service Bulletins 727-57A0182 and 727-57A0182 Revision 1 refer.\n\nCompliance: As specified in the Requirement document for the repetitive inspection and modification requirements; with a revised effective date of 2 November 2000.\n\nThis Amendment becomes effective on 2 November 2000.\n\nBackground: The FAA received reports indicating that fuel leakage of the wing centre section had occurred on several Model 727 aircraft due to cracking of the rear spar web of the wing centre section. The cracking initiates on the forward side of the spar and propagates through the web at the upper machined land radius between right and left Body Buttock Line 40.\n\nAmendment 1 is issued in response to a new FAA AD which requires accomplishment of the previously optional terminating action.\n\nThe original issue of this Airworthiness Directive became effective on 26 March 1998.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.003.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 13 September 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 4 October 2000.","sortOrder":0}],"analysis":{"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":4,"scope_assessment":{"changed":true,"description":"Amendment 1 changes scope by requiring completion of the previously optional terminating action. The AD now mandates inspections and the terminating modification as specified in FAA AD 2000-14-07 (per the Background: \"Amendment 1 is issued in response to a new FAA AD which requires accomplishment of the previously optional terminating action\"), increasing the compliance obligations for affected aircraft owners/operators."},"complexity_factors":["Cross-reference to an external FAA AD (FAA AD 2000-14-07) and Boeing Alert Service Bulletins, requiring users to consult multiple documents","Applicability specified by discrete ranges of aircraft line numbers rather than model-only, increasing tracking burden for operators","Requirement includes repetitive inspections plus a terminating modification option that has been made mandatory by the amendment","Regulatory change history: revokes an earlier AD and replaces it, so operators must reconcile prior compliance with new requirements","Revised effective/compliance date imposes timing and scheduling constraints on maintenance programs","Enforcement by CASA delegate creates administrative discretion in issuance and effecting of the AD"],"plain_english_summary":"This Airworthiness Directive requires operators of specified Boeing 727 line-numbered aircraft to carry out inspections and, where mandated by FAA AD 2000-14-07, modifications to the rear wing centre spar web between right and left BBL 40 to address cracking that can cause fuel leakage. Aircraft owners/operators must pay for and perform the inspections and any terminating modification; the CASA delegate enforces the AD and sets the compliance timing (effective 2 Nov 2000). The amendment makes a previously optional terminating action mandatory."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment stays tightly within the original purpose of addressing rear spar web cracking. The only change from the original 1998 directive is making a previously optional permanent fix now mandatory, which is a natural evolution of the same safety issue rather than scope creep."},"complexity_factors":["Very short document (under 400 words)","Only 3 substantive sections: Applicability, Requirement, and Compliance","Single cross-reference to external FAA technical document (AD 2000-14-07)","No defined terms section — relies on standard aviation terminology","Simple conditional logic: if your aircraft is in the listed line numbers, you must comply","No nested exceptions or complex procedural requirements"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection of the Boeing 727 rear spar web near BBL 40 for cracking and adopts FAA AD 2000-14-07’s technical instructions. It applies only to specific 727 production line numbers and makes the previously optional terminating repair mandatory to stop fuel leaks from the wing centre section. Effective 2 November 2000."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40","history":"/api/acts/ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40/history","analysis":"/api/acts/ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40/analysis","conflicts":"/api/acts/ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40/conflicts","importantCases":"/api/acts/ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40/important-cases","documents":"/api/acts/ad-b727-152-amdt-1-rear-spar-web-between-right-and-left-bbl-40/documents"}}