{"id":"F2006B08898","name":"AD/DH 82/12 - Cockpit Safety Harness Installation - Integrity and Lifing","slug":"ad-dh-82-12-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":52408,"registerId":"commonwealth-F2006B08898-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 82/12 - 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 82 (Tiger Moth) Series Aeroplanes\n\n \n\n# AD/DH 82/12  Cockpit Safety Harness Installation - Integrity and Lifing\n\nApplicability: All DH 82 Series aircraft.\n\n# 6/99\n\n \n\nRequirement: 1. Inspect integrity of the front and rear cockpit safety harness installations in accordance 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 cockpit safety harness installation 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 H34804A, H33257A or 51764A, 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":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive issued in response to a specific fatal accident investigation. It addresses exactly what it set out to address — harness integrity in Tiger Moth aircraft — without expansion into broader regulatory schemes."},"complexity_factors":["Short, single-purpose directive with only 3 substantive requirements","Minimal defined terms (only standard aviation abbreviations like P/N for 'part number')","Simple conditional logic (if harness has specific part numbers, replace; otherwise inspect)","Cross-references to external technical document (British Aerospace Mandatory TNS CT(Moth) No. 33) rather than reproducing detailed specifications inline","Straightforward compliance dates with clear 'whichever occurs first' alternatives","No nested exceptions or complex definitional sections"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection—and where specified, replacement—of cockpit safety harnesses in DH 82 Tiger Moth aircraft in Australia. It targets owners, operators and maintenance organisations to ensure restraint systems meet required integrity standards.\n\nThe action responds to a UK fatal crash showing harness webbing can deteriorate without visible signs, risking occupant ejection; the AD imposes initial and recurring inspection schedules and time-limited replacement requirements."},"flash_summary":{"complexity_score":6,"scope_assessment":{"changed":false,"description":"The directive applies to all DH 82 series aircraft and prescribes inspection, replacement and lifing requirements for cockpit harnesses. The instrument itself does not indicate any expansion or narrowing of that original applicability; it establishes specific compliance deadlines and part-numbered replacement rules but does not change the class of affected aircraft or add other components."},"complexity_factors":["Cross-reference to an external technical document (British Aerospace Mandatory TNS CT(Moth) No.33 Issue 1) for inspection and replacement procedures, requiring access and technical compliance.","Multiple distinct compliance timings (short-term inspections within 10 flying hours or by a fixed date; recurring annual checks; lifing limit of 9 years or 150 flying hours or by a fixed date) increasing scheduling and recordkeeping burden.","Specific part-numbered replacements (P/Ns H34804A, H33257A, 51764A) necessitating inventory checks and parts procurement.","Applicability to all DH 82 series aircraft expands administrative coverage across all operators of that type.","Safety-critical assessments of “integrity” where deterioration may be non‑visible, potentially requiring expert inspection techniques or conservative replacement.","Reference to a related foreign airworthiness directive (UK CAA AD 007-03-99) creating potential for differing interpretations or parallel compliance obligations."],"plain_english_summary":"Requires operators of DH 82 (Tiger Moth) aircraft to inspect and, where specified, replace cockpit safety harnesses in line with a British Aerospace technical notice. Owners/operators pay for inspections, replacements and record-keeping; the directive sets near-term and recurring inspection deadlines plus lifing limits for certain part numbers. It follows a UK accident finding that harness webbing can weaken without visible signs."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-82-12-cockpit-safety-harness-installation-integrity-and-lifing","history":"/api/acts/ad-dh-82-12-cockpit-safety-harness-installation-integrity-and-lifing/history","analysis":"/api/acts/ad-dh-82-12-cockpit-safety-harness-installation-integrity-and-lifing/analysis","conflicts":"/api/acts/ad-dh-82-12-cockpit-safety-harness-installation-integrity-and-lifing/conflicts","importantCases":"/api/acts/ad-dh-82-12-cockpit-safety-harness-installation-integrity-and-lifing/important-cases","documents":"/api/acts/ad-dh-82-12-cockpit-safety-harness-installation-integrity-and-lifing/documents"}}