{"id":"F2006B10883","name":"AD/JETSTREAM/16 Amdt 2 - Main Landing Gear Doors","slug":"ad-jetstream-16-amdt-2-main-landing-gear-doors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56407,"registerId":"commonwealth-F2006B10883-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/16 Amdt 2 - Main Landing Gear Doors","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/16\n\nAmdt 2\n\n  \nMain Landing Gear Doors 7/95\n\nApplicability: HP 137 Mk 1, Jetstream Series 200 and Jetstream Series 3100 aircraft, constructors numbers 601 through 695.\n\nRequirement: Action in accordance with Jetstream Alert Service Bulletin 32-A-JA840318 Revision 2.\n\nCompliance: Within 200 landings after 30 November 1986, and thereafter at intervals not to exceed 1000 landings, until modified in accordance with Jetstream Service Bulletin\n\n32-JM5280.\n\nThe compliance of the previous issue of this directive remains unchanged. This amendment is effective from 22 June 1995.\n\nBackground: Cases have been reported of the failure of rod end bearings, bending of rod shanks, cracking of rod threads, cracking of door hinges and door loss. Amendment 1 provided for terminating action.\n\nAmendment 2 is issued in response to a revision of the requirement document which amends the instructions for non-destructive testing of the hinges on the main landing gear doors.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This amendment remains tightly focused on its original purpose: ensuring the airworthiness of main landing gear doors on specific Jetstream aircraft. Amendment 2 simply updates the technical instructions for hinge inspection based on manufacturer revisions. It does not expand applicability to new aircraft models, add new systems, or broaden the regulatory scope beyond the specific mechanical issue identified in the original 1995 directive."},"complexity_factors":["Short, single-purpose directive (approximately 200 words)","Only 3 defined applicability criteria (aircraft models and serial numbers)","Single cross-reference to manufacturer service bulletins (Alert Service Bulletin 32-A-JA840318 Revision 2 and Service Bulletin 32-JM5280)","Simple conditional logic: inspect every 1000 landings OR terminate by modification","No nested exceptions or layered definitions","Clear compliance timeline with specific numerical triggers (200 landings, 1000 landings)","Amendment history is straightforward (Amendment 1 added terminating action, Amendment 2 updates testing instructions)"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspections and maintenance of main landing‑gear doors on certain British Aerospace Jetstream aircraft (HP 137 Mk 1, Series 200, Series 3100, s/n 601–695) to detect cracked hinges and worn bearings after incidents of doors detaching in flight. Owners must perform an initial check and repeat inspections at regular landing intervals until the aircraft is modified per the specified service bulletin.\n\nAmendment 2 revises the hinge testing instructions per updated manufacturer guidance."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 2 does not expand or narrow which aircraft are covered or alter the inspection intervals or the terminating modification. It revises the non‑destructive testing instructions for the main landing gear door hinges in the referenced service bulletin (Amendment 2; Requirement; Compliance). Operators still must inspect at the same intervals and may fit the same terminating modification."},"complexity_factors":["Technical specificity: requires non‑destructive testing (NDT) of hinge components, which demands trained personnel and equipment (Requirement; Background).","Recurring inspection schedule: mandatory initial and recurring checks tied to landing counts (Compliance).","Termination path: inspections continue until a specified modification is installed (Compliance), requiring parts/workshop access and modification tracking.","Cross‑document dependence: compliance depends on following two external service bulletins (32‑A‑JA840318 Rev 2 and 32‑JM5280) rather than standalone regulatory text (Requirement; Compliance).","Narrow applicability: applies only to specific constructor numbers, requiring operators to determine affected airframes (Applicability).","Amendment scope: this amendment revises inspection instructions rather than altering obligations or intervals, creating an update/implementation task for operators and maintainers (Amendment 2)."],"plain_english_summary":"This airworthiness directive requires owners/operators of British Aerospace Jetstream Series 200 and 3100 aeroplanes (constructor numbers 601–695) to carry out inspections and non‑destructive testing of the main landing gear doors following Jetstream Alert Service Bulletin 32‑A‑JA840318 Revision 2, and to repeat inspections at prescribed landing intervals until the terminating modification in Service Bulletin 32‑JM5280 is fitted (Applicability; Requirement; Compliance). It was issued after reports of bearing, rod and hinge failures; Amendment 2 updates the hinge NDT instructions (Background)."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-16-amdt-2-main-landing-gear-doors","history":"/api/acts/ad-jetstream-16-amdt-2-main-landing-gear-doors/history","analysis":"/api/acts/ad-jetstream-16-amdt-2-main-landing-gear-doors/analysis","conflicts":"/api/acts/ad-jetstream-16-amdt-2-main-landing-gear-doors/conflicts","importantCases":"/api/acts/ad-jetstream-16-amdt-2-main-landing-gear-doors/important-cases","documents":"/api/acts/ad-jetstream-16-amdt-2-main-landing-gear-doors/documents"}}