{"id":"F2006B06797","name":"AD/SC7/23 - Main Landing Gear Lever","slug":"ad-sc7-23-main-landing-gear-lever","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114654,"registerId":"commonwealth-F2006B06797-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/SC7/23 - Main Landing Gear Lever","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/SC7/23 Main Landing Gear Lever 10/95\n\nApplicability: All Skyvan 3, 3A, 3M, and Skyliner series aeroplanes.\n\n \n\nRequirement: Inspect and rework the main landing gear levers in accordance with Dowty Mandatory Service Bulletin (MSB) 32-9M, Revision 3.\n\n \n\nNote: CAA (UK) AD 003-03-86 refers.\n\n \n\nCompliance: Before 17 February 1996 or in accordance with the thresholds and intervals specified in Dowty MSB 32-9M, Revision 3, whichever is the later.\n\n \n\nBackground: The inspections and modifications are required to extend the service life up to 30 000 landings for aircraft of 12 500 lb. AUW or 27 000 landings for aircraft of 13 700 lb. AUW.\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\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD’s scope, as presented in the document, applies to all Skyvan 3, 3A, 3M and Skyliner series aeroplanes and requires inspection and rework of the main landing gear levers per Dowty MSB 32-9M, Revision 3, with compliance by 17 February 1996 or per the MSB thresholds/intervals (Applicability; Requirement; Compliance). The instrument’s stated purpose is to extend service life to the specified landing counts for two AUW categories (Background). There is no internal indication in the text that the scope has been altered from that stated intent."},"complexity_factors":["Delegation of all technical detail to an external document (Dowty MSB 32-9M, Revision 3), so the AD is short but compliance requires consulting that MSB (Requirement).","Compliance timing is conditional: a fixed date (17 February 1996) or the MSB’s thresholds/intervals, whichever is later (Compliance).","Applicability covers multiple aircraft variants (Skyvan 3, 3A, 3M and Skyliner), which may mean different operators must implement the same MSB requirements (Applicability).","The AD sets outcome‑oriented service‑life targets tied to two different AUW categories, which introduces an AUW‑dependent compliance rationale (Background).","The AD itself omits procedural detail (no step‑by‑step inspection or rework description), increasing administrative steps to locate and apply the MSB (Requirement).","Reference to an overseas regulator’s AD (CAA (UK)) adds cross‑jurisdictional context but no extra procedural clarity (Note)."],"plain_english_summary":"This AD requires operators of Skyvan 3/3A/3M and Skyliner aeroplanes to inspect and rework main landing‑gear levers per Dowty Mandatory Service Bulletin 32‑9M Rev.3, with compliance by 17 Feb 1996 or per the MSB’s thresholds/intervals. It aims to extend gear service life (to the stated landing limits by weight category). Operators must obtain and follow the MSB, schedule downtime and resources, and weigh costs versus the stated service‑life benefit."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on landing gear lever inspection and rework for one aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, specific mechanical component addressed (main landing gear lever)","Only one primary technical reference document (Dowty MSB 32-9M Rev 3)","Simple applicability clause covering all variants of one aircraft type","Straightforward compliance deadline with single alternative threshold","No defined terms section, no cross-references to other legislation beyond a single note referencing a UK CAA directive","Total length is approximately 150 words of substantive content"],"plain_english_summary":"This is an **Airworthiness Directive** — essentially a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) for specific aircraft.\n\n**What it does:**\n- Requires owners and operators of **Short SC7 Skyvan aircraft** (including models 3, 3A, 3M, and Skyliner variants) to inspect and repair their **main landing gear levers**.\n- The work must follow a specific technical document: **Dowty Mandatory Service Bulletin MSB 32-9M, Revision 3**.\n\n**Who it affects:**\n- Anyone who owns, operates, or maintains Short SC7 Skyvan series aeroplanes in Australia.\n\n**Why it matters:**\n- The landing gear lever is critical for safe takeoffs and landings. This directive prevents potential failures by ensuring these components can handle extended service life — up to **30,000 landings** for lighter aircraft or **27,000 landings** for heavier ones.\n- **Compliance deadline:** The work had to be completed before **17 February 1996**, or according to the schedules in the Dowty service bulletin, whichever came later.\n\n**Key point:** This is a **safety-critical maintenance requirement**. Non-compliance means the aircraft cannot legally fly in Australian airspace."}},"importantCases":[],"_links":{"self":"/api/acts/ad-sc7-23-main-landing-gear-lever","history":"/api/acts/ad-sc7-23-main-landing-gear-lever/history","analysis":"/api/acts/ad-sc7-23-main-landing-gear-lever/analysis","conflicts":"/api/acts/ad-sc7-23-main-landing-gear-lever/conflicts","importantCases":"/api/acts/ad-sc7-23-main-landing-gear-lever/important-cases","documents":"/api/acts/ad-sc7-23-main-landing-gear-lever/documents"}}