{"id":"F2006B09288","name":"AD/DIAMOND/4 - Canopy Locking Mechanism","slug":"ad-diamond-4-canopy-locking-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":53354,"registerId":"commonwealth-F2006B09288-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"AIRWORTHINESS DIRECTIVE","sectionType":"part","heading":"AIRWORTHINESS DIRECTIVE","content":"# AIRWORTHINESS DIRECTIVE\n\n![](image.001.png)\n\n![](image.001.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.\n\nDiamond (HOAC) Series Aeroplanes","sortOrder":0},{"sectionNumber":"AD/DIAMOND/4 Canopy Locking Mechanism 2/","sectionType":"part","heading":"AD/DIAMOND/4 Canopy Locking Mechanism 2/2002","content":"# AD/DIAMOND/4 Canopy Locking Mechanism 2/2002\n\nDM\n\nApplicability: All Model DV20 and DV22 aircraft.\n\nRequirement: Action in accordance with Diamond Aircraft Mandatory Service Bulletins (SB) 20-38 and 20-39.\n\nNote 1: A revision of the Flight Manual is required, and is documented in SB 20-39. Note 2: Austrian AD No. 110 refers.\n\nCompliance: Within 5 hours time in service after 19 December 2001 or before 19 January 2002, whichever occurs first. Thereafter, inspect the canopy locking mechanism in accordance with SB No. 39 at intervals not to exceed 100 hours time in service.\n\nThis Airworthiness Directive becomes effective on 19 December 2001.\n\nBackground: Reports were received of inadvertent in-flight opening of the cockpit canopy.\n\n![Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 12 December 2001\n\n![](image.001.png)","sortOrder":1}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD addresses a specific unsafe condition (in‑flight canopy opening) and applies to all DV20 and DV22 aircraft (Applicability). It mandates corrective and inspection actions set out in the manufacturer’s Service Bulletins (Requirement) and does not expand applicability or introduce obligations beyond those remedial and recurring maintenance measures described in the instrument."},"complexity_factors":["Narrow applicability: covers only Diamond Model DV20 and DV22 (Applicability).","Mandates external technical documents: requires compliance with Diamond Mandatory Service Bulletins 20‑38 and 20‑39 (Requirement), which contain the detailed procedures and thus shift interpretive burden to those documents.","Short initial compliance window: initial action required within 5 hours TIS after 19 Dec 2001 or before 19 Jan 2002, whichever is earlier (Compliance) — creates urgent scheduling and potential grounding costs.","Ongoing periodic inspections: recurring inspection interval not to exceed 100 hours TIS (Compliance) imposes continuing maintenance planning and recordkeeping.","Operational change: mandatory Flight Manual revision documented in SB 20‑39 (Note 1) requires administrative update and crew compliance.","Enforcement and discretion: issued by CASA delegate under CAR 1998 subregulation 39.1(1) (preamble) — legal force is clear but technical implementation relies on manufacturer's SBs."],"plain_english_summary":"Requires owners/operators of Diamond (HOAC) DV20 and DV22 aeroplanes to carry out the actions in Diamond Mandatory Service Bulletins 20‑38 and 20‑39, including a flight‑manual revision and canopy‑locking inspections. Initial work must be done within 5 hours time‑in‑service after 19 December 2001 or before 19 January 2002, and inspections thereafter at intervals not exceeding 100 hours. CASA (via its delegate) enforces the AD under CAR 1998; costs, downtime and maintenance are borne by aircraft owners/operators."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a targeted safety directive addressing a specific mechanical defect in specific aircraft models. The scope remains precisely limited to the canopy locking mechanism issue as originally identified."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined applicability criteria (Model DV20 and DV22)","Single requirement referencing external documents (Service Bulletins 20-38 and 20-39)","Simple compliance timeline with clear alternative deadline ('whichever occurs first')","No nested exceptions or conditional logic","Minimal cross-referencing (one reference to Austrian AD No. 110, one to CAR 1998 subregulation 39.1(1))","Straightforward background-to-requirement structure"],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Diamond DV20 and DV22 aeroplanes to urgently inspect and remedy the cockpit canopy locking mechanism to prevent inadvertent in-flight openings. Compliance requires following the manufacturer service bulletins within 5 flying hours after 19 December 2001 (or by 19 January 2002), updating the Flight Manual as directed, and carrying out recurring canopy-lock inspections every 100 flying hours. It addresses reports of canopies opening in flight and eliminates a significant safety risk."},"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-diamond-4-canopy-locking-mechanism","history":"/api/acts/ad-diamond-4-canopy-locking-mechanism/history","analysis":"/api/acts/ad-diamond-4-canopy-locking-mechanism/analysis","conflicts":"/api/acts/ad-diamond-4-canopy-locking-mechanism/conflicts","importantCases":"/api/acts/ad-diamond-4-canopy-locking-mechanism/important-cases","documents":"/api/acts/ad-diamond-4-canopy-locking-mechanism/documents"}}