{"id":"F2006B08894","name":"AD/DH 60/7 Amdt 1 - Introduction of Increased Strength Seat Harness Transverse Cable","slug":"ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":52394,"registerId":"commonwealth-F2006B08894-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/DH 60/7 Amdt 1 - Introduction of Increased Strength Seat Harness Transverse Cable","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \n\nAIRWORTHINESS 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 revokes Airworthiness Directive (AD) AD/DH 60/7 and issues the following 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\nDe Havilland DH 60 (Moth) Series Aeroplanes\n\nAD/DH 60/7\n\nAmdt 1\n\n  \n\nIntroduction of Increased Strength Seat Harness Transverse Cable\n\n  \n4/2001\n\nApplicability: All DH 60 Series aircraft.\n\nRequirement: Replace existing harness transverse cables with cables of higher strength in accordance with British Aerospace Mandatory TNS CT(Moth) No 37 Issue 2 dated 1 December 2000. Alternate cables of equivalent or greater strength to those required by TNS CT(Moth) No 37 Issue 2 are acceptable.\n\nNote: UK CAA AD 002-10-2000 refers.\n\nCompliance: Before 22 February 2002, unless already accomplished. This amendment becomes effective on 19 April 2001.\n\nBackground: Investigation in UK has shown that, under overload conditions, the initial point of failure of the harness assembly or attachments can be the shoulder harness transverse cable. This failure will result in total loss of upper body restraint for the seat occupant. The UK Air Accident Investigation Branch specifically recommended that the existing cable be replaced by one of higher strength.\n\nAmendment 1 has been issued to permit alternate cables to those specified in the requirement document to be used.\n\nThe original issue of this Airworthiness Directive became effective on 22 February 2001.\n\n![Signature of David Alan Villiers Delegate of the Civil Aviation Safety Authority](image.002.png)  \n\nDavid Alan Villiers\n\nDelegate of the Civil Aviation Safety Authority 26 February 2001\n\n![](image.001.png)  \n\nThe above AD is notified in the Commonwealth of Australia Gazette on 21 March 2001.\n\n  \nPage 1 of 1","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"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"Amendment 1 widened acceptable compliance options by permitting alternate cables of equivalent or greater strength rather than limiting operators to the specific cable detailed in the original requirement, while keeping the same safety objective (Requirement; Amendment 1)."},"complexity_factors":["Single prescriptive corrective action: replace harness transverse cable — operationally simple mechanical task (Requirement).","Applicability to all DH 60 series aircraft creates a broad affected population but uniform action (Applicability).","Dependence on an external technical document (BAe Mandatory TNS CT(Moth) No 37 Issue 2) for implementation details — buyers/maintainers must obtain that document (Requirement).","Allowance for alternate cables of equivalent/greater strength introduces an equivalence judgment for compliance (Requirement; Amendment 1).","Fixed compliance deadline (Before 22 February 2002) imposes scheduling and financial burden on owners/operators (Compliance).","Administrative change: revocation of the prior AD and issuance by CASA delegate reduces regulatory uncertainty but leaves implementation to operators (Signature; Background)."],"plain_english_summary":"**This AD requires owners/operators of all De Havilland DH 60 (Moth) series aircraft to replace the seat‑harness transverse (shoulder) cable with a higher‑strength cable (per BAe TNS CT(Moth) No 37 Issue 2 or an equivalent) by 22 February 2002.** CASA’s delegate revoked the prior AD after a UK investigation found transverse‑cable failures under overload. Owners pay to replace the cable, must follow the specified instructions, and may use alternate cables of equivalent or greater strength (Requirement; Compliance; Background)."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of requiring stronger seat harness cables. The only change is adding flexibility to use alternative cables of equivalent strength, which is a minor procedural variation rather than an expansion of scope."},"complexity_factors":["Single, specific technical requirement (cable replacement)","Only 4 defined structural sections (Applicability, Requirement, Compliance, Background)","One cross-reference to UK aviation safety document (TNS CT(Moth) No 37 Issue 2)","One simple exception (alternate cables of equivalent/greater strength permitted)","No nested conditions or complex conditional logic","Very short document (approximately 250 words of substantive text)"],"plain_english_summary":"CASA requires owners of De Havilland DH.60 \"Moth\" biplanes to replace the original shoulder‑harness transverse cables with stronger ones after UK investigations showed the originals can snap in crashes, risking loss of upper‑body restraint.\n\nReplacements must follow British Aerospace TNS CT(Moth) No 37 Issue 2 (1 Dec 2000) or be of equivalent or greater strength, and the work must be completed before 22 February 2002."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable","history":"/api/acts/ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable/history","analysis":"/api/acts/ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable/analysis","conflicts":"/api/acts/ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable/conflicts","importantCases":"/api/acts/ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable/important-cases","documents":"/api/acts/ad-dh-60-7-amdt-1-introduction-of-increased-strength-seat-harness-transverse-cable/documents"}}