{"id":"F2006B03285","name":"AD/B767/104 - Main Landing Gear Front Trunnion Support Pin","slug":"ad-b767-104-main-landing-gear-front-trunnion-support-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":42722,"registerId":"commonwealth-F2006B03285-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B767/104 - Main Landing Gear Front Trunnion Support Pin","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)  \nBoeing 767 Series Aeroplanes\n\nAD/B767/104 Main Landing Gear Front Trunnion Support Pin 11/98\n\nApplicability: Model 767 series aircraft having line positions 1 through 562.\n\nRequirement: Inspect in accordance with the technical requirements of FAA AD 98-16-07 Amdt 39- 10683.\n\nNote: Boeing Alert Service Bulletin 767-57A0047 Revision 1 refers.\n\nCompliance: As specified in the Requirement Document with a revised effective date of 8 October 1998.\n\nThis Airworthiness Directive becomes effective on 8 October 1998.\n\nBackground: The FAA received reports indicating that pin assemblies in the forward trunnion support of the main landing gear were found to have corroded as a result of plating cracks. Corrosion in a pin assembly could result in breakage, and consequent collapse of the main landing gear.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive targeting a specific mechanical defect in a specific aircraft model range. It has not expanded beyond its original purpose of addressing the corroded pin safety issue."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term implicitly referenced (line positions)","Single, clear requirement: inspect per external document","No nested conditions or exceptions","No internal cross-references beyond a single note referencing a Boeing service bulletin","Relies entirely on incorporated external document (FAA AD 98-16-07) for technical details"],"plain_english_summary":"This is a **safety order for specific Boeing 767 aircraft**.\n\n**What it does:**\nThis document is an **Airworthiness Directive (AD)** — a mandatory safety instruction issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of certain Boeing 767 aeroplanes to **inspect a specific part** of the main landing gear (the \"front trunnion support pin\") for dangerous corrosion.\n\n**Who it affects:**\n- **Aircraft affected:** Boeing 767 series planes with \"line positions 1 through 562\" (essentially, the first 562 aircraft built in this series)\n- **People affected:** Airlines, aircraft operators, and maintenance engineers responsible for these specific planes\n\n**Why it matters:**\nThe US Federal Aviation Administration (FAA) found that some of these pins had corroded due to cracks in their protective metal plating. If a corroded pin breaks, the **main landing gear could collapse** — a catastrophic failure that could happen during landing or on the ground. This directive forces operators to check for this problem before it causes an accident.\n\n**What must be done:**\nOperators must follow the exact inspection procedures laid out in **FAA AD 98-16-07** (a US safety order that CASA is adopting). They must complete these inspections by the deadlines specified in that US document, but with an Australian effective date of **8 October 1998**.\n\n**Key point:** This isn't optional — compliance is legally required to keep these aircraft airworthy in Australia."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The directive applies to Boeing 767 series aircraft at line positions 1–562 and requires inspections in accordance with FAA AD 98-16-07. The instrument implements inspection requirements to address reported corrosion in forward trunnion support pins and does not expand or narrow that stated technical focus in the text provided (Applicability; Requirement; Background)."},"complexity_factors":["Cross-reference to an external FAA Airworthiness Directive for the technical inspection details (Requirement)","Reference to a manufacturer service bulletin as related material rather than a standalone technical specification (Note)","Limited applicability to defined line positions reduces scope but requires operators to verify aircraft serial/line positions (Applicability)","Compliance depends on the effective date and any revised effective date specified in the Requirement document (Compliance)","Technical nature of the inspection (landing gear pin corrosion) requires qualified maintenance personnel to carry out and interpret inspections (Requirement)"],"plain_english_summary":"The Civil Aviation Safety Authority requires operators of Boeing 767s (line positions 1–562) to carry out the inspection program set out in FAA Airworthiness Directive 98‑16‑07 after corrosion and plating cracks were found in forward trunnion support pin assemblies that could cause main‑gear collapse. A Boeing service bulletin is cited as related material. Operators and their maintenance teams must follow the FAA instructions, bear inspection and repair costs, and obtain the external technical documents to comply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b767-104-main-landing-gear-front-trunnion-support-pin","history":"/api/acts/ad-b767-104-main-landing-gear-front-trunnion-support-pin/history","analysis":"/api/acts/ad-b767-104-main-landing-gear-front-trunnion-support-pin/analysis","conflicts":"/api/acts/ad-b767-104-main-landing-gear-front-trunnion-support-pin/conflicts","importantCases":"/api/acts/ad-b767-104-main-landing-gear-front-trunnion-support-pin/important-cases","documents":"/api/acts/ad-b767-104-main-landing-gear-front-trunnion-support-pin/documents"}}