{"id":"F2006B06796","name":"AD/SC7/22 - Main Landing Gear Brake Flange","slug":"ad-sc7-22-main-landing-gear-brake-flange","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114652,"registerId":"commonwealth-F2006B06796-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SC7/22 - Main Landing Gear Brake Flange","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Short SC7 (Skyvan) Series Aeroplanes\n\n \n\nAD/SC7/22 Main Landing Gear Brake Flange 10/95\n\nApplicability: Skyvan MK 3, 3A, 3M, and Skyliner series aeroplanes.\n\n \n\nRequirement: Inspect, using the fluorescent penetrant method, the main landing gear brake flanges in accordance with Dowty Mandatory Service Bulletin (MSB) 32-10M, Revision 3.\n\n \n\nNote: CAA (UK) AD 017-12-81 refers.\n\n \n\nCompliance: Before the thresholds specified in Dowty MSB 32-10M, Revision 3 or before 17 September 1995, whichever occurs later.\n\n \n\nRe-inspect at intervals not to exceed 1000 landings.\n\n \n\nBackground:  Dowty has completed a fatigue analysis of the main landing gear and inspections of the brake flange are required to take advantage of the increase in service life which resulted.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive addressing a specific fatigue issue in a specific aircraft component. It has not expanded beyond its original purpose of mandating brake flange inspections for the SC7 Skyvan series."},"complexity_factors":["Single, specific technical requirement (one inspection method)","Only 4 aircraft variants covered (narrow applicability)","Simple compliance timeline (one initial deadline + recurring interval)","No nested exceptions or conditional logic","No defined terms section","Single cross-reference to UK CAA AD and manufacturer bulletin","Document is essentially a one-page safety order"],"plain_english_summary":"This CASA Airworthiness Directive mandates fluorescent-penetrant inspections of main landing-gear brake flanges on Short SC7 Skyvan MK3/3A/3M and Skyliner models to detect fatigue cracks. Inspections must be done per Dowty Mandatory Service Bulletin MSB 32-10M Rev 3 — initially by the earlier of the MSB’s flight-hour/landing threshold or 17 Sep 1995, then every 1,000 landings. It’s required to prevent flange failure, gear collapse or loss of braking."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The AD conditions an increase in main landing gear service life on operators performing specified inspections: it implements Dowty's fatigue-analysis outcome by mandating fluorescent-penetrant inspections per Dowty MSB 32-10M Rev 3 and periodic re-inspection every 1,000 landings. That shifts the practical scope of maintenance obligations onto operators (Requirement; Compliance; Re-inspect; Background) by making extended life contingent on ongoing inspection and record-keeping."},"complexity_factors":["Narrow applicability limited to Skyvan MK 3, 3A, 3M and Skyliner series — reduces scope complexity (Applicability).","Mandatory reference to an external technical document (Dowty MSB 32-10M, Revision 3) — operators must obtain and follow that MSB (Requirement).","Specified inspection technique (fluorescent penetrant) requires trained maintenance personnel and equipment, adding technical compliance burden (Requirement).","Time/threshold condition: compliance before MSB thresholds or a fixed date (17 Sep 1995), requiring interpretation of MSB thresholds against calendar timing (Compliance).","Recurring re-inspection interval tied to landings (every 1,000 landings) imposes operational tracking and record-keeping obligations (Re-inspect).","Cross-reference to CAA (UK) AD 017-12-81 may require harmonised interpretation for internationally operated aircraft (Note)."],"plain_english_summary":"This airworthiness directive requires operators of Skyvan MK 3, 3A, 3M and Skyliner aeroplanes to inspect the main landing gear brake flanges using the fluorescent penetrant method, following Dowty Mandatory Service Bulletin (MSB) 32-10M Revision 3. Initial inspection must occur before the MSB-specified thresholds or before 17 September 1995 (whichever is later), and re-inspections are required every 1,000 landings. The AD links an increased gear service life to compliance, so operators pay for inspections, record-keeping and any remedial work (Requirement; Compliance; Re-inspect; Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sc7-22-main-landing-gear-brake-flange","history":"/api/acts/ad-sc7-22-main-landing-gear-brake-flange/history","analysis":"/api/acts/ad-sc7-22-main-landing-gear-brake-flange/analysis","conflicts":"/api/acts/ad-sc7-22-main-landing-gear-brake-flange/conflicts","importantCases":"/api/acts/ad-sc7-22-main-landing-gear-brake-flange/important-cases","documents":"/api/acts/ad-sc7-22-main-landing-gear-brake-flange/documents"}}