{"id":"F2006B10538","name":"AD/HS 125/95 - Main Landing Gear Door - Forward Hinge Fitting","slug":"ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":116339,"registerId":"commonwealth-F2006B10538-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/HS 125/95 - Main Landing Gear Door - Forward Hinge Fitting","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)  \nBritish Aerospace BAe 125 Series Aeroplanes\n\nAD/HS 125/95 Main Landing Gear Door \\- Forward Hinge Fitting 11/88\n\nApplicability: All BAe/DH/BH//HS 125 series aircraft post Mod 255640 which have main gear door forward hinge fittings P/N 25-WS3787 - \\* 25-WS3788 - \\* \\* all suffix number derivatives 25-6WS325 - \\* 25-6WS326 - \\* that have exceeded 6000 landings.\n\nRequirement: Action in accordance with BAe125 SB 32-218.\n\nNote: British CAA AD 008-06-88 refers.\n\nCompliance: 1. For hinge fittings which have exceeded 6000 landings at 3 November 1988, carry out the X10 visual inspection as defined in Paragraph 2B of BAe SB 32-218 within 100 landings after 3 November 1988. Thereafter, reinspect at intervals not exceeding 300 landings till replaced. In any case replace not later than 30 June 1989.\n\n    2. For hinge fittings with more than 8000 landings at 3 November 1988, replace prior to 31 December 1988.\n\n    3. For hinge fittings found cracked replace before further flight.\n\nBackground: Country of origin A.D. In-service failure of hinge fittings at the door jack attachment lugs has occurred.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a classic, narrowly-scoped airworthiness directive. It addresses a specific, identified safety defect in a specific aircraft type without expanding into broader operational or regulatory matters. The scope remains tightly focused on the hinge fitting failure mode described in the background."},"complexity_factors":["Short, single-issue directive focused on one mechanical component","Only 4 specific part numbers affected, though with wildcard suffixes","Clear, tiered compliance structure based on landing counts (three distinct categories)","Single cross-reference to British Aerospace Service Bulletin SB 32-218 for technical procedures","No nested definitions or interpretation section","Temporal deadlines have all passed (1988-1989), making current compliance straightforward (either done or aircraft retired)","Background section provides concise safety rationale"],"plain_english_summary":"Owners and operators of certain BAe 125 (DH/BH/HS 125) jets with Mod 255640 and over 6,000 landings must inspect or replace the forward hinge fitting on the main landing‑gear doors (part numbers 25‑WS3787/8, 25‑6WS325/6) because in‑service failures have occurred. High‑time fittings required immediate replacement; medium‑time fittings require near‑term and recurring inspections; any cracked fitting grounds the aircraft until fixed.\n\nThis AD implements the corrective actions in a British Aerospace service bulletin and mirrors a UK CAA directive."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This AD implements the country‑of‑origin (British CAA) airworthiness directive and targets the same forward hinge fittings and landing‑count triggers. It prescribes the X10 inspection per BAe SB 32‑218 and fixed replacement deadlines (Compliance: 1–3; Note). The AD does not expand applicability beyond the listed aircraft, fittings or the specified landing thresholds."},"complexity_factors":["Narrow technical applicability: specific BAe 125 series aircraft post Mod 255640 and specific part numbers (Applicability).","Cross-reference to an external service bulletin: requires X10 visual inspection as defined in Paragraph 2B of BAe SB 32‑218 (Requirement; Compliance).","Multiple landing‑count thresholds with different actions and deadlines: >6000 landings (inspection within 100 landings, then ≤300‑landing intervals, replace by 30 June 1989) and >8000 landings (replace by 31 Dec 1988) (Compliance: 1–2).","Immediate safety action: cracked fittings must be replaced before further flight, creating potential grounding and immediate replacement costs (Compliance: 3).","Time‑bound compliance dates increase operational scheduling and parts‑supply pressure (Compliance: dates stated in Compliance paragraphs).","Regulatory enforcement under Part 39 AD framework; limited administrative discretion in compliance timing beyond prescribed intervals."],"plain_english_summary":"Requires operators of BAe 125 series aircraft fitted with specified main landing‑gear forward hinge fittings (post Mod 255640) that have exceeded 6,000 or 8,000 landings to carry out X10 visual inspections and to replace fittings by set deadlines. It responds to in‑service hinge‑fitting failures at the door jack attachment lugs and mandates inspections/reinspections and immediate replacement if cracks are found (Applicability; Compliance: 1–3). Operators pay inspection, grounding and replacement costs and must follow the BAe SB 32‑218 procedure."}},"importantCases":[],"_links":{"self":"/api/acts/ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting","history":"/api/acts/ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting/history","analysis":"/api/acts/ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting/analysis","conflicts":"/api/acts/ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting/conflicts","importantCases":"/api/acts/ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting/important-cases","documents":"/api/acts/ad-hs-125-95-main-landing-gear-door-forward-hinge-fitting/documents"}}