{"id":"F2006B06911","name":"AD/SD3-60/65 - Main Landing Gear Aft Pintle Pin Bushes","slug":"ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114791,"registerId":"commonwealth-F2006B06911-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\nFor the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.\n\n![](image.001.png)  \n\nShort SD3-60 Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/SD3-60/65 Main Landing Gear Aft Pintl","sectionType":"part","heading":"AD/SD3-60/65 Main Landing Gear Aft Pintle Pin Bushes 8/2003","content":"# AD/SD3-60/65 Main Landing Gear Aft Pintle Pin Bushes 8/2003\n\nApplicability: All SD3-60 aircraft.\n\nRequirement: Action in accordance with Shorts Mandatory Service Bulletin SD360-32-36.\n\nCompliance: At the next “D” Check after 7 August 2003 or before 30 April 2005, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 7 August 2003.\n\nBackground: The manufacturer received a report of an accident where the main landing gear failed to fully extend and lock. Investigation revealed deterioration and corrosion of the aft pintle pin bushes. Additionally, a high frequency of landing gear indication problems appear to be associated with deterioration of the aft pintle pin bushes.\n\n![Signature of David Villiers Delegate of the Civil Aviation Safety Authority](image.002.jpeg)  \n\nDavid Villiers\n\nDelegate of the Civil Aviation Safety Authority 18 June 2003\n\n![](image.001.png)","sortOrder":1}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This AD maintains its original narrow scope: addressing a specific unsafe condition in a specific aircraft type's landing gear. It has not expanded beyond the original safety issue identified."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced ('D' Check — industry standard maintenance interval)","Single, clear applicability criterion ('All SD3-60 aircraft')","No cross-references to other legislation beyond the enabling regulation (CASR 1998 subreg 39.1(1))","Simple conditional compliance: 'whichever occurs first' is the only logical operator","No nested exceptions or sub-delegations"],"plain_english_summary":"This Airworthiness Directive mandates inspection and repair of the aft pintle pin bushes on the main landing gear of all Short SD3-60 aircraft, using Shorts Mandatory Service Bulletin SD360-32-36.  \n\nIssued after a crash linked to corrosion and deterioration of these bushes (and related warning-light faults), the work must be done at the next D check after 7 Aug 2003 or before 30 Apr 2005. It affects all owners/operators and maintenance engineers of these aircraft."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD applies to all SD3-60 aircraft and requires compliance with the manufacturer’s Service Bulletin by a specified maintenance interval or date. It does not broaden applicability or add obligations beyond implementing the SB within the stated timeframe."},"complexity_factors":["Narrow, single-type applicability (all Short SD3-60 aircraft) reduces stakeholder diversity","Compliance timing tied to maintenance cycle (“D” Check) or a fixed date introduces scheduling coordination","Requirement depends on an external document (Shorts Mandatory Service Bulletin SD360-32-36) — substantive actions are in that SB, not the AD text","Safety-critical hardware (aft pintle pin bushes) increases procedural and recordkeeping precision","Clear legal basis (CASR subreg 39.1(1)) with little administrative discretion in the AD text itself","Costs and operational disruption fall on aircraft operators/owners (scheduling, parts, labour)","Background links the requirement to a reported accident and recurring indication problems, focusing remedy on corrosion-related deterioration"],"plain_english_summary":"Mandates that all Short SD3-60 aircraft have their main landing gear aft pintle pin bushes inspected and corrected (repair or replacement) in accordance with Shorts Mandatory Service Bulletin SD360‑32‑36. Work must be done at the next “D” Check after 7 August 2003 or before 30 April 2005 to address corrosion that can stop the gear from fully extending and locking.\n\nAircraft operators must schedule and pay for the required maintenance and follow the manufacturer’s instructions; the AD is issued under CASR subreg 39.1(1)."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes","history":"/api/acts/ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes/history","analysis":"/api/acts/ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes/analysis","conflicts":"/api/acts/ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes/conflicts","importantCases":"/api/acts/ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes/important-cases","documents":"/api/acts/ad-sd3-60-65-main-landing-gear-aft-pintle-pin-bushes/documents"}}