{"id":"F2006B10896","name":"AD/JETSTREAM/29 Amdt 5 - Flap Torque Tube Universal Joints","slug":"ad-jetstream-29-amdt-5-flap-torque-tube-universal-joints","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56431,"registerId":"commonwealth-F2006B10896-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/29 Amdt 5 - Flap Torque Tube Universal Joints","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)  \nBritish Aerospace BAe 3100 (Jetstream) Series Aeroplanes\n\nAD/JETSTREAM/29\n\nAmdt 5\n\n  \nFlap Torque Tube Universal Joints 13/93\n\nApplicability: All HP137 Mk1, Jetstream Series 200, and Jetstream Series 3100 aircraft.\n\nAll Jetstream Series 3200 aircraft up to and including constructors number 956.\n\nRequirement: Action in accordance with British Aerospace Mandatory Service Bulletins 27-A-JA 881041 Revision 2 and 27-JM 5313 Revision 2, or 27-JM 5322.\n\nNote: Accomplishment of Part 1 or Part 2 of BAe SB 27-JA920340, constitutes terminating action for the requirements of this Directive.\n\nCompliance: As specified in the requirement documents, with flying hours to count from previous certified compliance; until accomplishment of Part 1 or Part 2 of British Aerospace Service Bulletin 27-JA920340.\n\nThis amendment is effective from 9 December 1993.\n\nBackground: A failure of the flap torque shaft universal joint securing rivet occurred.\n\nThis condition could have resulted in asymmetric flap deployment. Amendment 1 introduced an alternative modification (JM 5322) to suit a different joint configuration, and required inspection of joints that had already been modified.\n\nAmendment 3 upgraded 27-JM5313 to Rev 2 which revised a periodicity. Amendment 4 included the 3200 series.\n\nAmendment 5 is issued to introduce optional terminating action for this directive.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":true,"description":"Originally issued to address a specific rivet failure in flap systems (AD/JETSTREAM/29), this directive has expanded through five amendments: adding alternative modifications for different joint configurations (Amdt 1), revising inspection intervals (Amdt 3), expanding to cover the 3200 series aircraft (Amdt 4), and now introducing optional terminating action (Amdt 5). The scope has evolved from a simple inspection mandate to a flexible regime with multiple compliance paths and a permanent resolution option."},"complexity_factors":["Multiple cross-referenced technical documents (4 different Service Bulletin numbers with revision levels)","Conditional applicability based on aircraft model and construction number cutoff","Alternative compliance paths (two different sets of bulletins, plus terminating action)","Technical aviation terminology requiring specialized knowledge (torque tubes, universal joints, asymmetric deployment)","Amendment history references (Amendments 1, 3, 4, 5) that modify previous requirements without restating them fully"],"plain_english_summary":"This CASA Airworthiness Directive requires inspection and repair of a universal‑joint rivet in the flap torque‑tube on certain British Aerospace Jetstream aircraft to prevent rivet failure and risky asymmetric flap deployment. It affects HP137 Mk1, Jetstream 200, 3100, and 3200 (up to c/n 956).\n\nCompliance follows specified British Aerospace service bulletins, with Parts 1 or 2 of SB 27‑JA920340 providing a terminating, one‑time fix to end repeated inspections."},"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":true,"description":"Amendment history expanded and refined scope: earlier amendments added an alternative modification and included Series 3200; Amendment 5 adds an optional terminating action (completion of Part 1 or Part 2 of BAe SB 27-JA920340) that changes ongoing inspection obligations into a one-off modification option. Implementers must therefore manage either continuing compliance or a permanent modification route."},"complexity_factors":["Multiple referenced service bulletins and revisions (27-A-JA 881041 Rev 2; 27-JM 5313 Rev 2; 27-JM 5322) increase cross-document tracking.","Optional terminating action (Part 1 or Part 2 of BAe SB 27-JA920340) creates alternative compliance paths and end-state conditions.","Compliance counting rule — flying hours count from previous certified compliance — requires historical compliance records.","Applicability spans several model series with a constructor-number cutoff for Series 3200 (up to and including c/n 956).","Amendment history changed periodicity and added model coverage, so implementers must reconcile earlier amendments and current text.","The directive leaves detailed inspection/repair specifics to the manufacturer service bulletins, shifting technical judgment to maintainers following those documents."],"plain_english_summary":"Requires operators of specified British Aerospace Jetstream and HP137 Mk1 aircraft to inspect and/or modify flap torque tube universal joints per specified BAe Mandatory Service Bulletins to prevent asymmetric flap deployment after a reported rivet failure. Operators must carry out the inspection/modification schedules in the referenced service bulletins, with flying hours counted from previous certified compliance. Completing Part 1 or Part 2 of BAe Service Bulletin 27-JA920340 is an optional terminating action that stops further AD requirements."},"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-jetstream-29-amdt-5-flap-torque-tube-universal-joints","history":"/api/acts/ad-jetstream-29-amdt-5-flap-torque-tube-universal-joints/history","analysis":"/api/acts/ad-jetstream-29-amdt-5-flap-torque-tube-universal-joints/analysis","conflicts":"/api/acts/ad-jetstream-29-amdt-5-flap-torque-tube-universal-joints/conflicts","importantCases":"/api/acts/ad-jetstream-29-amdt-5-flap-torque-tube-universal-joints/important-cases","documents":"/api/acts/ad-jetstream-29-amdt-5-flap-torque-tube-universal-joints/documents"}}