{"id":"F2006B08918","name":"AD/DH 94/2 - Cockpit Safety Harness Installation - Integrity and Lifing","slug":"ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52467,"registerId":"commonwealth-F2006B08918-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 94/2 - Cockpit Safety Harness Installation - Integrity and Lifing","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)  DH 94 (Moth Minor) Series Aeroplanes\n\n \n\n# AD/DH 94/2  Cockpit Safety Harness Installation - Integrity and Lifing\n\nApplicability: All DH 94 Series aircraft.\n\n \n\nRequirement: 1. Inspect integrity of the front and rear cockpit safety harness installations in\n\n# 6/99\n\naccordance with Paragraph 2A of British Aerospace Mandatory TNS CT(Moth) No. 33 Issue 1 dated 1 March 1999.\n\n \n\n2.    Inspect integrity of the front and rear cockpit safety harness installations in accordance with Paragraph 2B of British Aerospace Mandatory TNS CT(Moth) No. 33 Issue 1 dated 1 March 1999.\n\n \n\n3.    For front and rear cockpit safety harnesses P/Ns H20746, 94F83 or 94F155, replace in accordance with Paragraph 2D of British Aerospace Mandatory TNS CT(Moth) No. 33 Issue 1 dated 1 March 1999.\n\n \n\nNote: UK CAA AD 007-03-99 refers.\n\n \n\nCompliance: 1. Within 10 flying hours or before 17 September 1999 whichever occurs first and thereafter at intervals not exceeding 12 months.\n\n \n\n2.    Within 10 flying hours or before 17 September 1999 whichever occurs first.\n\n \n\n3.    Within 9 years of the initial installation date of harness or, if the installation date is not known, within 150 flying hours or before 17 June 2002 whichever occurs first.\n\n \n\nThis Airworthiness Directive becomes effective on 17 June 1999.\n\n \n\nBackground:  Investigation into a fatal accident in UK revealed that the harness restraint cables and one lap strap near the stitching had failed during impact. Subsequent investigation revealed that the strength of the webbing had significantly deteriorated without any visual indication.\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_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"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in a specific aircraft type. It has not expanded beyond its original purpose of ensuring cockpit harness integrity in DH 94 series aircraft."},"complexity_factors":["Short, single-purpose directive (3 requirements only)","No defined terms section — relies on external technical document (British Aerospace Mandatory TNS CT(Moth) No. 33)","Simple conditional logic: 'if installation date unknown, use flying hours alternative'","Clear, specific part numbers and deadlines","Cross-reference to UK CAA AD 007-03-99 for context only, not incorporated by complex reference","No nested exceptions or sub-delegations"],"plain_english_summary":"CASA's AD requires owners, operators and maintainers of DH 94 (Moth Minor) aeroplanes to inspect and, where necessary, replace cockpit safety harnesses following a UK fatality showing harness webbing can deteriorate invisibly and fail in impact. \n\nIt mandates integrity inspections per manufacturer guidance and replacement of specified harnesses after a defined in-service age or where installation date is unknown, to remove a hidden, life‑threatening risk."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive implements targeted inspection and lifing requirements for DH 94 series harnesses following a UK accident. The text applies these measures to all DH 94 aircraft and does not indicate any expansion or contraction of that stated safety scope."},"complexity_factors":["Reference to an external technical procedure: British Aerospace Mandatory TNS CT(Moth) No.33 Issue 1 (Requirements 1–3) — operators must obtain and follow that document.","Multiple, mixed compliance triggers and deadlines: flying hours, fixed calendar dates, and multi‑year lifing (Compliance section).","Specific part-numbered replacements: P/Ns H20746, 94F83, 94F155 (Requirement 3) require accurate parts identification and supply.","Conditional lifing when installation date unknown: alternative threshold of 150 flying hours or a fixed date (Compliance for Requirement 3) — creates recordkeeping and decision tasks.","Different inspection regimes: Requirement 1 includes a recurring 12‑month interval; Requirement 2 appears as a separate inspection with a different timing — increases procedural complexity.","Technical inspection standard tied to BAe guidance because deterioration may be non‑visible (Background and Requirements) — may require specialist inspection skills or tooling.","Broad applicability to all DH 94 Series aircraft (Applicability) increases the number of affected operators but simplifies scope identification."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of all DH 94 series aeroplanes to inspect front and rear cockpit safety-harness installations and to replace specific harness part numbers under a defined service-life. It mandates following British Aerospace Mandatory TNS CT(Moth) No.33 procedures and sets deadlines measured in flying hours, fixed dates and years. Owners/operators pay for inspections and replacements; the regulator enforces compliance."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing","history":"/api/acts/ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing/history","analysis":"/api/acts/ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing/analysis","conflicts":"/api/acts/ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing/conflicts","importantCases":"/api/acts/ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing/important-cases","documents":"/api/acts/ad-dh-94-2-cockpit-safety-harness-installation-integrity-and-lifing/documents"}}