{"id":"F2006B09466","name":"AD/EMB-110/25 Amdt 3 - Main Landing Gear Torque Link Key","slug":"ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53936,"registerId":"commonwealth-F2006B09466-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/EMB-110/25 Amdt 3 - Main Landing Gear Torque Link Key","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)  \nEmbraer EMB-110 (Bandeirante) Series Aeroplanes\n\nAD/EMB-110/25\n\nAmdt 3\n\n  \nMain Landing Gear Torque Link Key 3/90\n\nApplicability: All model EMB-110 with S/Nos 110001 through 110472. Requirement: Action in accordance with Embraer SB 110-032-0056 Rev. 3.\n\nNote: Brazilian AD 82-12-02 R3 refers to the original Requirement document.\n\nCompliance: Within 50 hours time in service after 13 July 1989 for keys P/N 14468 or P/N 14468A that have achieved 2950 landings, or prior to achieving 3000 landings, whichever is earlier, and thereafter inspect at operating hour intervals specified in the Requirement Document.\n\nBackground: Fracture of keys P/N 14468 and P/N 14468A has occurred. Replacement is required prior to achieving 3000 landings. Amendment 2 references SB 110-032-0056 Rev 2 which supersedes SB 110-032-0077 now cancelled. Amendment 3 references latest revision to the Requirement document. This revises recurring inspection intervals.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a routine amendment to an existing airworthiness directive. Amendment 3 simply updates the reference to the latest revision of the manufacturer's Service Bulletin (Rev. 3 instead of Rev. 2). The scope remains tightly focused on the original safety issue: preventing torque link key fractures on specific Embraer aircraft. No expansion of applicability or fundamental change to the regulatory intent."},"complexity_factors":["Single specific aircraft type and serial number range","Only one substantive requirement (comply with referenced Service Bulletin)","Simple compliance trigger (landing count or flight hours)","No nested definitions or cross-references to other legislation","Background section provides clear rationale without legal complexity","Total length under 200 words"],"plain_english_summary":"This is a **safety directive for specific Brazilian-made aircraft** (Embraer EMB-110 Bandeirante planes with serial numbers 110001 through 110472).\n\n**What it does:**\n- Requires owners/operators to inspect and replace a specific part on the main landing gear — the \"torque link key\" (part numbers 14468 or 14468A)\n- These keys have been **fracturing**, which is dangerous for landing safety\n\n**Who must act:**\n- Anyone operating these specific Embraer aircraft\n\n**What must be done:**\n- Replace the key **before it reaches 3,000 landings**, or within 50 flight hours after 13 July 1989 if the key has already done 2,950 landings — whichever comes first\n- After replacement, continue **regular inspections** at intervals set out in Embraer's Service Bulletin 110-032-0056 Revision 3\n\n**Why it matters:**\n- Broken landing gear components can cause runway accidents\n- This is the **third update** (Amendment 3) to the original 1990 directive, reflecting new technical information about inspection schedules\n\n**Key terms explained:**\n- **Airworthiness Directive (AD):** A mandatory safety order from aviation regulators\n- **Service Bulletin (SB):** Technical instructions from the aircraft manufacturer\n- **Time in service:** Actual flight hours (not just calendar time)"},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 3 changes the scope of ongoing obligations by referencing Embraer SB 110-032-0056 Revision 3 and thereby revising the recurring inspection intervals. The core replacement threshold before 3,000 landings for the affected part numbers remains in the AD, but the recurring inspection frequency is updated by the latest SB revision. (Background; Requirement; Compliance)"},"complexity_factors":["Cross-reference to an external technical document (Embraer SB 110-032-0056 Rev. 3) for operative procedures and recurring intervals rather than setting them directly in the AD (Requirement).","Narrow applicability tied to aircraft serial-number range and specific part numbers, requiring operators to identify affected airframes and parts (Applicability).","Time/usage threshold mechanism: compliance depends on tracking discrete landing counts (2,950 and 3,000 landings) plus a short time window (50 hours TIS after 13 July 1989) which creates a monitoring and record-keeping task (Compliance).","Recurring inspection schedule delegated to the service bulletin, producing ongoing compliance obligations whose frequency is determined outside the AD text (Requirement; Compliance).","Amendment history and revisions (Amendment 3 updates the referenced SB and revises intervals) mean operators must ensure they use the latest revision named in the AD (Background)."],"plain_english_summary":"This AD applies to Embraer EMB‑110 (SN 110001–110472) and requires operators to follow Embraer Service Bulletin SB 110‑032‑0056 Rev. 3 to inspect and, where necessary, replace main landing‑gear torque link keys (P/N 14468, 14468A). Keys at or above 2,950 landings must be inspected within 50 hours after 13 July 1989 or replaced before 3,000 landings, with recurring inspections per the SB.\n\nOperators must track landing counts, schedule inspections/replacements, and bear the associated downtime and costs to address reported key fractures."}},"importantCases":[],"_links":{"self":"/api/acts/ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key","history":"/api/acts/ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key/history","analysis":"/api/acts/ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key/analysis","conflicts":"/api/acts/ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key/conflicts","importantCases":"/api/acts/ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key/important-cases","documents":"/api/acts/ad-emb-110-25-amdt-3-main-landing-gear-torque-link-key/documents"}}