{"id":"F2006B03354","name":"AD/B767/179 Amdt 1 - Inboard Main Flap Support Bolts","slug":"ad-b767-179-amdt-1-inboard-main-flap-support-bolts","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42797,"registerId":"commonwealth-F2006B03354-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/179 Amdt 1 - Inboard Main Flap Support Bolts","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Safety Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS DIRECTIVE\n\n![](image.001.png)  \n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/B767/179 and issues the following 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 767 Series Aeroplanes\n\nAD/B767/179\n\nAmdt 1\n\n  \nInboard Main Flap Support Bolts 9/2003\n\nApplicability: Model 767 series aircraft, including Model 767-400ER aircraft; line numbers 1 through 879.\n\nRequirement: Action in accordance with the technical requirements of FAA AD 2003-11-16 Amdt 39-13175.\n\nNote: Boeing Alert Service Bulletin 767-27A0176 Revision 1 refers.\n\nCompliance: As specified in the Requirement document, with a revised effective date of 4 September 2003.\n\nThis Amendment becomes effective on 4 September 2003.\n\nBackground: The FAA received a report indicating that an operator found one missing bolt and two loose bolts out of four bolts at the aft attachment locations on the outboard support of the inboard main flap on a B767 series aircraft. There was evidence that the bolts were not installed tightly, though when the improper installation occurred has not been determined. The outboard support for the inboard main flap cannot carry limit load with one bolt missing in the aft attachment locations. Missing, loose, or cracked bolts at this location, if not detected, could lead to loss of the inboard main flap.\n\nAmendment 1 is issued in response to a new FAA AD, which requires a new one- time inspection and check, corrective actions if necessary, and eventual replacement of existing titanium bolts with steel bolts.\n\nThe original issue of this Airworthiness Directive became effective on 26 December 2002.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Villiers\n\n![](image.001.png)Delegate of the Civil Aviation Safety Authority 22 July 2003\n\nThe above AD is notified in the Commonwealth of Australia Gazette on 13 August 2003.\n\n  \n\nPage 1 of 1","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment 1 expands the original AD’s requirements by adopting the new FAA AD: it adds a mandated one‑time inspection and check, corrective actions where defects are found, and a requirement to replace titanium bolts with steel bolts (Background; Requirement). The amendment also revokes the prior AD and sets a revised effective date (opening paragraph; Compliance)."},"complexity_factors":["Cross-reference to an external FAA AD (FAA AD 2003-11-16) rather than standalone technical text (Requirement).","Dependence on Boeing Alert Service Bulletin 767-27A0176 Revision 1 for technical instructions (Note).","Applicability limits by model and line numbers constrain which operators must comply (Applicability).","Mixed actions: one-time inspection, corrective actions if necessary, and eventual replacement — multiple operational steps and timelines (Background; Requirement).","Regulatory procedural step: revocation of the prior AD and issuance of an amendment with a revised effective date (opening paragraph; Compliance).","Operational burden on operators: inspection labour, possible repairs, procurement and fitment of steel bolts (Background)."],"plain_english_summary":"This directive requires operators of Boeing 767 aircraft (line numbers 1–879) to follow FAA AD 2003-11-16: carry out a one‑time inspection of the inboard main flap aft support bolts, perform any corrective actions found, and replace existing titanium bolts with steel bolts (Requirement; Background). CASA revoked the earlier AD and set compliance timing and the effective date. The practical effect is an enforced inspection, repair and parts‑replacement program that aircraft operators must fund and schedule under CASA’s instruction."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"The original AD (effective 26 December 2002) has expanded in scope through Amendment 1. The original directive addressed the unsafe condition of missing/loose bolts. Amendment 1 adds new requirements: (1) a new one-time inspection and check, (2) corrective actions if necessary, and (3) eventual replacement of titanium bolts with steel bolts. This represents a significant expansion from immediate corrective action to a phased approach with interim inspections and ultimate hardware replacement."},"complexity_factors":["Short, single-page document with straightforward structure","Only 4 defined elements: applicability (aircraft models), requirement (reference to external FAA document), compliance (effective date), and background","Heavy reliance on external technical document (FAA AD 2003-11-16) — actual technical requirements not contained in this instrument","No nested exceptions or conditional logic within the instrument itself","Simple amendment structure: revokes previous version, sets new effective date, adds new inspection/replacement requirements","Cross-reference to Boeing Alert Service Bulletin 767-27A0176 Rev 1 for additional technical context"],"plain_english_summary":"This Airworthiness Directive from CASA replaces a prior order and mandates operators of Boeing 767 (line numbers 1–879, including 767-400ER) to follow FAA technical instructions to inspect, repair, and ultimately replace inboard main flap attachment bolts. \n\nIt’s required because missing, loose, or cracked bolts can allow flap support failure and potential in-flight detachment — a serious safety risk observed when one operator found one missing and two loose bolts."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-179-amdt-1-inboard-main-flap-support-bolts","history":"/api/acts/ad-b767-179-amdt-1-inboard-main-flap-support-bolts/history","analysis":"/api/acts/ad-b767-179-amdt-1-inboard-main-flap-support-bolts/analysis","conflicts":"/api/acts/ad-b767-179-amdt-1-inboard-main-flap-support-bolts/conflicts","importantCases":"/api/acts/ad-b767-179-amdt-1-inboard-main-flap-support-bolts/important-cases","documents":"/api/acts/ad-b767-179-amdt-1-inboard-main-flap-support-bolts/documents"}}