{"id":"F2006B10953","name":"AD/JETSTREAM/83 Amdt 1 - Nose Wheel Steering - Inspection","slug":"ad-jetstream-83-amdt-1-nose-wheel-steering-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56520,"registerId":"commonwealth-F2006B10953-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/83 Amdt 1 - Nose Wheel Steering - Inspection","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/83\n\nAmdt 1\n\n  \nNose Wheel Steering \\- Inspection 8/99 TX\n\nApplicability: All British Aerospace Regional Aircraft HP137 Mk 1 Jetstream Series 200, 3100 and 3200 series aircraft.\n\nRequirement: Inspect the nose wheel steering feedback system freeplay and self centring system in accordance with Jetstream Alert Service Bulletin 32-A-JA980840 Revision 3 dated 5 May 1999.\n\nNote: Jetstream ASB 32-A-JA980840 Revision 3 has been endorsed MANDATORY by the CAA UK.\n\nCompliance: Compliance is to be achieved as follows:\n\n    Aircraft with 15,000 or more landings \\- by 15 August 1999\n\n    2. Aircraft with between 10,000 and 14,999 landings \\- by 15 September 1999\n\n    3. Aircraft with 9,999 or less landings \\- by 15 October 1999 This Amendment becomes effective on 28 June 1999.\n\nBackground: Investigation of a recent accident revealed excessive free play between the steering handle or knob and the nose wheels due to wear in the steering selector differential, the two steering follow up mechanism toggle sub assemblies, the main upper toggle; assembly and the main lower toggle assembly. This Directive originally introduced an inspection to ensure that any free play in the steering mechanism was within acceptable limits. The UK CAA has determined that the original inspection called up in SB 32-A-JA980840 Rev 2 was inadequate and has now determined that a completely new procedure is required to ensure the safety of the aeroplane.\n\nThis amendment mandates the re-inspection of all aircraft regardless of the outcomes and work performed under the original issue of the AD.\n\nThe original issue of this Airworthiness Directive became effective on 8 January 1999.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment stays within the original scope of addressing nose wheel steering safety issues in Jetstream aircraft. While it expands the requirement (mandating re-inspection of all aircraft regardless of previous compliance), this is a refinement of the same safety purpose rather than scope creep into unrelated areas."},"complexity_factors":["Single, specific technical requirement referencing an external manufacturer bulletin (ASB 32-A-JA980840 Rev 3)","Three-tier compliance deadline structure based on landing counts","One main applicability clause covering multiple aircraft series","Minimal defined terms (only standard aviation terminology like 'landings' and 'freeplay')","No nested exceptions or conditional logic beyond the landing-count thresholds","Short document (approximately 250 words) with straightforward structure: applicability, requirement, compliance, background"],"plain_english_summary":"This AD mandates inspection of nose‑wheel steering for dangerous wear/“freeplay” on British Aerospace Jetstream HP137 Mk 1 (Series 200, 3100, 3200) using the manufacturer’s Alert Service Bulletin (Rev 3). It responds to an accident showing worn steering components can make taxiing unsafe and requires re‑inspection even if earlier checks passed.\n\nThe AD took effect 28 June 1999 and sets staggered re‑inspection deadlines by aircraft usage."},"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":4,"scope_assessment":{"changed":true,"description":"Scope expanded from the original AD issued 8 January 1999. The amendment requires re‑inspection of all affected aircraft regardless of outcomes or work completed under the original directive and replaces the earlier inspection procedure with a new one endorsed in Jetstream ASB 32-A-JA980840 Revision 3 after the UK CAA found the prior inspection inadequate."},"complexity_factors":["Model-specific applicability limited to BAe HP137 Mk 1 Jetstream Series 200, 3100 and 3200 (narrow target population).","Mandated compliance with an external technical document: Jetstream ASB 32-A-JA980840 Revision 3 (requires reliance on and interpretation of the service bulletin).","Phased deadlines tied to aircraft landing counts (three different compliance dates: ≥15,000; 10,000–14,999; ≤9,999 landings), adding administrative tracking burden.","Mandatory re‑inspection regardless of previous compliance or corrective work (removes discretion for operators who complied under the original AD).","Technical focus on multiple mechanical assemblies (steering selector differential, follow-up toggle subassemblies, main upper and lower toggles) increases inspection detail and potential repair scope.","Regulatory endorsement by the UK CAA noted (ASB was endorsed mandatory by CAA UK), creating cross‑jurisdictional validation to follow.","Short effective timeline (amendment effective 28 June 1999 with staggered deadlines starting 15 August 1999) concentrates scheduling and workload."],"plain_english_summary":"This directive requires operators of British Aerospace Regional Aircraft HP137 Mk 1 Jetstream Series 200, 3100 and 3200 to inspect the nose-wheel steering feedback freeplay and self-centring system following Jetstream Alert Service Bulletin 32-A-JA980840 Revision 3. Compliance deadlines are phased by landing-count and the amendment mandates re‑inspection of all aircraft regardless of prior work. Operators fund inspections and fixes; the Civil Aviation Safety Authority enforces compliance. The change follows a finding that the earlier inspection procedure was inadequate."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-83-amdt-1-nose-wheel-steering-inspection","history":"/api/acts/ad-jetstream-83-amdt-1-nose-wheel-steering-inspection/history","analysis":"/api/acts/ad-jetstream-83-amdt-1-nose-wheel-steering-inspection/analysis","conflicts":"/api/acts/ad-jetstream-83-amdt-1-nose-wheel-steering-inspection/conflicts","importantCases":"/api/acts/ad-jetstream-83-amdt-1-nose-wheel-steering-inspection/important-cases","documents":"/api/acts/ad-jetstream-83-amdt-1-nose-wheel-steering-inspection/documents"}}