{"id":"F2006L01325","name":"AD/B727/202 - Wing Front and Rear Spar Terminal Fittings","slug":"ad-b727-202-wing-front-and-rear-spar-terminal-fittings","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":58822,"registerId":"commonwealth-F2006L01325-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 727 Series Aeroplanes","sectionType":"division","heading":"Boeing 727 Series Aeroplanes","content":"### Boeing 727 Series Aeroplanes\n\n| AD/B727/202 | Wing Front and Rear Spar Terminal Fittings | 6/2006 |\n| ----------- | ------------------------------------------ | ------ |\n\n| Applicability: | Model 727, 727C, 727-100, 727-100C, and 727-200 series aircraft; as identified in Boeing Alert Service Bulletin 727-57A0185 Revision 1, dated 3 November 2005, or later FAA approved revision.                                                                                                                                                                                                                                                                                                      |\n| -------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with the technical requirements if FAA AD 2006-07-17 Amdt 39-14544.                                                                                                                                                                                                                                                                                                                                                                                                            |\n| Compliance:    | As specified in the Requirement document, with a revised effective date of8 June 2006.                                                                                                                                                                                                                                                                                                                                                                                                              |\n|                | This Airworthiness Directive becomes effective on 8 June 2006.                                                                                                                                                                                                                                                                                                                                                                                                                                      |\n| Background:    | The FAA received reports of cracking of the terminal fittings of the spars of the wings. This Directive requires determining if the terminal fittings are made of 7079 aluminium alloy material. If the terminal fittings are found to be 7079 aluminium alloy, repetitive inspections and other actions are required. Undetected stress-corrosion cracking of a terminal fitting could result in failure of a terminal fitting connection and loss of structural integrity of the wing attachment. |\n\n![](image.001.png)  \nRichard Castles  \nDelegate of the Civil Aviation Safety Authority\n\n28 April 2006","sortOrder":0},{"sectionNumber":"AD/B727/202","sectionType":"part","heading":"AD/B727/202","content":"## AD/B727/202","sortOrder":1},{"sectionNumber":"Wing Front and Rear Spar Terminal Fittin","sectionType":"part","heading":"Wing Front and Rear Spar Terminal Fittings","content":"## Wing Front and Rear Spar Terminal Fittings","sortOrder":2},{"sectionNumber":"6/2006","sectionType":"part","heading":"6/2006","content":"## 6/2006","sortOrder":3}],"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":false,"description":"Scope is unchanged from the FAA technical requirements: the AD adopts the FAA AD 2006-07-17 actions for the identified Boeing 727 models. The only modification noted in this instrument is a revised effective date of 8 June 2006 (Compliance)."},"complexity_factors":["Cross-reference to external FAA AD 2006-07-17 and Boeing Alert Service Bulletin 727-57A0185 Rev 1, creating dependency on documents outside the AD (Requirement; Applicability).","Material-identification step: operators must determine whether fittings are 7079 aluminium alloy before further actions are required (Background; Requirement).","Repetitive inspections and unspecified 'other actions' imply ongoing maintenance schedules and possible parts replacement, increasing operational burden (Requirement; Background).","Applicability spans multiple model variants, so fleet-level planning and record checks are required (Applicability).","Revised effective date changes timing for compliance planning (Compliance).","Safety-critical risk (stress-corrosion cracking) makes timely compliance necessary; failure has high consequence for structural integrity (Background)."],"plain_english_summary":"This Airworthiness Directive requires operators of specified Boeing 727 series aeroplanes (as listed in Boeing Alert Service Bulletin 727-57A0185 Rev 1 or later FAA-approved revision) to determine whether wing front and rear spar terminal fittings are made of 7079 aluminium alloy and, if they are, to carry out repetitive inspections and other corrective actions in accordance with FAA AD 2006-07-17. It affects aircraft owners/operators who must schedule inspections, possible repairs or replacements and bear the associated compliance costs, and was prompted by reports of stress‑corrosion cracking that could compromise wing attachment."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard airworthiness directive maintaining its original narrow scope: addressing a specific structural defect in a specific aircraft type. No scope creep detected."},"complexity_factors":["Very short document (approximately 200 words of substantive content)","Only 1 defined applicability reference (Boeing Alert Service Bulletin 727-57A0185)","Single technical requirement incorporating external FAA directive by reference","No nested exceptions or conditional logic beyond the binary material check (7079 alloy yes/no)","Straightforward compliance timeline with single effective date"],"plain_english_summary":"CASA requires owners/operators of specified Boeing 727 series (as listed in Boeing Alert SB 727-57A0185 Rev 1 or later) to inspect front and rear wing spar terminal fittings to determine if they’re 7079 aluminium. If so, perform repetitive inspections and corrective actions per FAA AD 2006-07-17. This mandatory action responds to stress‑corrosion cracking that could cause loss of wing attachment and catastrophic failure. Effective 8 June 2006."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-202-wing-front-and-rear-spar-terminal-fittings","history":"/api/acts/ad-b727-202-wing-front-and-rear-spar-terminal-fittings/history","analysis":"/api/acts/ad-b727-202-wing-front-and-rear-spar-terminal-fittings/analysis","conflicts":"/api/acts/ad-b727-202-wing-front-and-rear-spar-terminal-fittings/conflicts","importantCases":"/api/acts/ad-b727-202-wing-front-and-rear-spar-terminal-fittings/important-cases","documents":"/api/acts/ad-b727-202-wing-front-and-rear-spar-terminal-fittings/documents"}}