{"id":"F2006B09674","name":"AD/F27/104 Amdt 1 - Main Undercarriage Drag Stay - Inspection","slug":"ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115811,"registerId":"commonwealth-F2006B09674-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/104 Amdt 1 - Main Undercarriage Drag Stay - Inspection","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)  \nFokker F27 Series Aeroplanes\n\nAD/F27/104\n\nAmdt 1\n\n  \nMain Undercarriage Drag Stay \\- Inspection 6/82\n\nApplicability: All models F27 Mks, 100, 200, 300, 400, 600 and 700 with main undercarriage drag\n\nstay type Nos. 200275001, 200485001, 09057YA01, 200261001 and F27 Mk. 500\n\nwith drag stay type 20022401 not marked with UT or V on the unit data plate.\n\nDocument: Dowty Rotol SB No. 32-114B and 32-42S.\n\nCompliance: 1. For drag stays which have achieved 20,000 landings or more, before 1 August 1982, unless previously accomplished.\n\n2. For drag stays which have achieved 10,000 landings but less than 20,000 landings, before 1 November 1982, unless previously accomplished.\n\nBackground: The inner bores of some drag stays have been found to have surface break-up generated during the tube drawing process. Amdt. 1 of this Directive is issued to include Mk. 500 aircraft.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1755},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"Amendment 1 expanded the applicability to include Fokker F27 Mk 500 aircraft equipped with drag stay type 20022401 not marked with UT or V on the data plate. The original directive only covered Mks 100, 200, 300, 400, 600, and 700."},"complexity_factors":["Technical aviation terminology requiring specialized knowledge (drag stays, landing cycles, service bulletins)","Conditional compliance deadlines based on aircraft landing history","Specific part number identification required to determine applicability (200275001, 200485001, etc.)","Cross-references to external manufacturer documents (Dowty Rotol Service Bulletins 32-114B and 32-42S)"],"plain_english_summary":"Owners/operators of Fokker F27 Mk 100–700 aircraft must perform mandatory inspections of the main landing-gear drag-stay inner bores because some tubes have internal drawing defects that could cause structural failure. The rule adds Mk 500s and sets compliance based on landing cycles (urgent for ≥20,000 landings, later for 10,000–20,000), to prevent possible landing-gear collapse."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection","history":"/api/acts/ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection/history","analysis":"/api/acts/ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection/analysis","conflicts":"/api/acts/ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection/conflicts","importantCases":"/api/acts/ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection/important-cases","documents":"/api/acts/ad-f27-104-amdt-1-main-undercarriage-drag-stay-inspection/documents"}}