{"id":"F2006B08893","name":"AD/DH 60/6 - Cockpit Safety Harness Installation - Integrity and Lifing","slug":"ad-dh-60-6-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":52391,"registerId":"commonwealth-F2006B08893-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 60/6 - 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)  De Havilland DH 60 (Moth) Series Aeroplanes\n\n \n\n# AD/DH 60/6  Cockpit Safety Harness Installation - Integrity and Lifing\n\nApplicability: All DH 60 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. For front and rear cockpit safety harnesses P/Ns H34804A, H33257A, 51764A, H20746 or H37544, 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 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\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"},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"The Directive is limited to cockpit safety-harness integrity and lifing on all DH 60 series aircraft, requiring inspection and replacement of specified harnesses. The text does not indicate an expansion or narrowing of that scope beyond those actions and affected parts."},"complexity_factors":["Cross-reference to an external technical document (British Aerospace Mandatory TNS CT(Moth) No. 33) for procedural detail.","Multiple specific harness part numbers subject to replacement, requiring parts identification and possible inventory action.","Different compliance timelines: immediate short-term inspection window (10 flying hours), recurring annual interval, and lifing replacement by age or hours.","Record-keeping burden where installation date is unknown (necessitates log checks or conservative replacement).","Regulatory enforcement by the Civil Aviation Safety Authority; noncompliance carries airworthiness consequences."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of De Havilland DH 60 series aircraft to inspect cockpit safety-harness installations and to replace specified harness part numbers per British Aerospace Mandatory TNS CT(Moth) No. 33. The Civil Aviation Safety Authority issues and enforces the requirement.\n\nOperators must do an initial inspection within 10 flying hours (and yearly thereafter) and replace listed harnesses within nine years of installation (or sooner if installation date is unknown). Owners pay for inspections, record-keeping and replacements to address webbing deterioration."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-issue airworthiness directive focused specifically on cockpit safety harness integrity. It has not expanded beyond its original purpose of addressing seatbelt failures following the UK accident investigation."},"complexity_factors":["Very short document (under 300 words)","Only 2 substantive requirements with clear compliance deadlines","Single defined applicability (all DH 60 Series aircraft)","Minimal cross-referencing (one UK CAA AD reference and one British Aerospace technical standard)","No nested exceptions or conditional logic","Straightforward temporal compliance structure (hours OR calendar date, whichever first)"],"plain_english_summary":"The CASA Airworthiness Directive requires owners/operators of De Havilland DH 60 (Moth) series aircraft to inspect front and rear safety harness installations to a specified British Aerospace standard and to replace certain harness part numbers, after a UK fatal crash showed webbing can deteriorate without visible signs.\n\nIt targets owners, operators and maintenance engineers of vintage Moth variants because aging seatbelt webbing may be deceptively weak—mandatory inspections and timely replacements reduce the risk of harness failure in a crash."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-60-6-cockpit-safety-harness-installation-integrity-and-lifing","history":"/api/acts/ad-dh-60-6-cockpit-safety-harness-installation-integrity-and-lifing/history","analysis":"/api/acts/ad-dh-60-6-cockpit-safety-harness-installation-integrity-and-lifing/analysis","conflicts":"/api/acts/ad-dh-60-6-cockpit-safety-harness-installation-integrity-and-lifing/conflicts","importantCases":"/api/acts/ad-dh-60-6-cockpit-safety-harness-installation-integrity-and-lifing/important-cases","documents":"/api/acts/ad-dh-60-6-cockpit-safety-harness-installation-integrity-and-lifing/documents"}}