{"id":"F2006B06754","name":"AD/SAAB/4 - Main Landing Gear Operation","slug":"ad-saab-4-main-landing-gear-operation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":114581,"registerId":"commonwealth-F2006B06754-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.002.png)\n\n![](image.002.png)  \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 CAR 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.","sortOrder":0},{"sectionNumber":"AD/SAAB/4 Main Landing Gear Operation 8/","sectionType":"part","heading":"AD/SAAB/4 Main Landing Gear Operation 8/2000","content":"# AD/SAAB/4 Main Landing Gear Operation 8/2000\n\nApplicability: All Safir 91A, 91B, 91B-2, 91C and 91D series aircraft.\n\nRequirement: Inspect the main landing gear for correct function in accordance with procedures in Safir Service Bulletin 91.2.006 dated 28 April, 2000.\n\nNote: Swedish Airworthiness Directive SAD No 1-154R1 refers.\n\nCompliance: Unless previously accomplished, within 75 flights after the effective date of this Directive or by 30 April 2001, whichever occurs first.\n\nThis Airworthiness Directive becomes effective on 10 August 2000.\n\nBackground: The manufacturer has reported the unintentional collapse of the undercarriage after landing. This resulted in damage to the landing gear, aircraft structure, engine and propeller assembly.\n\n![Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority](image.003.png)  \n\nEugene Paul Holzapfel\n\nDelegate of the Civil Aviation Safety Authority 4 July 2000\n\n![](image.002.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.","sortOrder":1}],"analysis":{"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"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive implements a time-limited inspection requirement that aligns with the manufacturer’s service bulletin and the cited Swedish AD. It applies only to the listed Safir models and does not broaden obligations beyond the inspection procedure and compliance window set out in the AD (Applicability; Requirement; Compliance; Note; Background)."},"complexity_factors":["Single, specific mandatory action: inspect main landing gear function per Safir Service Bulletin 91.2.006 (Requirement).","Clear applicability to a limited set of models: Safir 91A, 91B, 91B-2, 91C and 91D series (Applicability).","Firm, short compliance window: within 75 flights or by 30 April 2001 (Compliance).","Operational impact: inspections may require grounding or downtime until completed (Compliance/Requirement).","Procedural dependence on manufacturer documentation: the Service Bulletin defines how to perform the inspection (Requirement).","Reference to related foreign directive: Swedish Airworthiness Directive SAD No 1-154R1 is cited (Note).","Issued under regulatory delegation: CASA delegate action under subregulation 39.1(1) of CAR 1998 (preamble), limiting discretionary variability in scope and timing."],"plain_english_summary":"Requires owners/operators of Saab Safir 91A, 91B, 91B-2, 91C and 91D aircraft to inspect main landing gear operation following Safir Service Bulletin 91.2.006 (28 April 2000). Compliance must occur within 75 flights after the directive or by 30 April 2001, whichever is sooner. The measure responds to reported unintentional undercarriage collapses that caused damage; owners/operators bear inspection costs and potential downtime while the work is performed."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete safety directive addressing a specific mechanical failure mode. It has not expanded beyond its original purpose of mandating landing gear inspections for the Safir 91 series."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive operative sections (Requirement and Compliance)","Single defined reference (Safir Service Bulletin 91.2.006)","No nested conditional logic — simple 'unless previously accomplished' exception","Clear applicability limited to specific aircraft models","Straightforward time-based compliance trigger (75 flights or fixed date)"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety order for aircraft. Think of it like a car recall, but for planes.\n\n**What it does:**\nOrders owners and operators of specific Saab aircraft (the Safir 91 series) to inspect their main landing gear to make sure it works properly.\n\n**Who it affects:**\nAnyone who owns or operates a Saab Safir 91A, 91B, 91B-2, 91C, or 91D aircraft.\n\n**Why it matters:**\nThe manufacturer reported cases where the landing gear collapsed after landing, causing serious damage to the plane. This directive prevents accidents by requiring a specific inspection.\n\n**What must be done:**\n- Follow the inspection procedures in \"Safir Service Bulletin 91.2.006\" (dated 28 April 2000)\n- Do this within 75 flights or by 30 April 2001 — whichever comes first\n\n**When it takes effect:**\n10 August 2000"}},"importantCases":[],"_links":{"self":"/api/acts/ad-saab-4-main-landing-gear-operation","history":"/api/acts/ad-saab-4-main-landing-gear-operation/history","analysis":"/api/acts/ad-saab-4-main-landing-gear-operation/analysis","conflicts":"/api/acts/ad-saab-4-main-landing-gear-operation/conflicts","importantCases":"/api/acts/ad-saab-4-main-landing-gear-operation/important-cases","documents":"/api/acts/ad-saab-4-main-landing-gear-operation/documents"}}