{"id":"F2006B10923","name":"AD/JETSTREAM/53 Amdt 1 - Door Locking Mechanism Taper Pin","slug":"ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":56466,"registerId":"commonwealth-F2006B10923-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/JETSTREAM/53 Amdt 1 - Door Locking Mechanism Taper Pin","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/53\n\nAmdt 1\n\n  \nDoor Locking Mechanism Taper Pin 1/93\n\nApplicability: Model 3100 and 3200 Series with Main Passenger/Crew Door serial numbers listed in BAe Jetstream ASB 52-A-JA 911140 Revision 2.\n\nRequirement: Action in accordance with BAe Jetstream Mandatory ASB 52-A-JA 911140 Revision 2.\n\nNote: Aircraft on which a previous issue of this SB has already been accomplished, require no further work.\n\nCompliance: Unless already accomplished; prior to 31 July 1992.\n\nThe compliance of the previous issue of this Directive remains unchanged. This Amendment is effective from 7 January 1993.\n\nBackground: During installation of a passenger/crew door, it was discovered that the taper pin retaining the indicator button assembly to the locking dog had been inadvertently omitted on production of the door mechanism. The absence of the pin could result in loosening of the outer handle indicator button and inability to open the door from the outside. Amendment 1 is issued in response to the latest issue of the Requirement Document which deletes an incorrect diagram and dimensions.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the airworthiness directive. It is a technical correction only — removing an incorrect diagram and dimensions from the referenced documentation. The safety issue being addressed (the missing taper pin) and the affected aircraft population remain unchanged from the original directive."},"complexity_factors":["Very short document (under 300 words)","Only 1 defined term implicitly referenced (the service bulletin)","Single, straightforward requirement: comply with external technical document","No nested conditions or exceptions beyond standard 'already done' exemption","Clear applicability criteria (specific aircraft models and door serial numbers)","Minimal cross-referencing (only to the British Aerospace service bulletin)"],"plain_english_summary":"This airworthiness directive requires owners/operators of British Aerospace Jetstream 3100/3200 aircraft with the door serial numbers listed in Service Bulletin 52-A-JA 911140 Rev.2 to inspect and rectify a manufacturing defect in the main passenger/crew door where a missing taper pin can allow the outer handle to loosen and prevent external opening in an emergency.\n\nThe amendment corrects an erroneous diagram with wrong measurements in the original directive; required work was to be completed by 31 July 1992, and aircraft already corrected under earlier versions need take no further action."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"Amendment 1 corrects the Requirement Document by deleting an incorrect diagram and dimensions but does not alter applicability, required action, or the compliance deadline. The substantive scope and who must act remain the same (see 'Requirement' and 'Background')."},"complexity_factors":["Narrow technical scope — applies only to BAe Jetstream 3100/3200 aircraft with listed door serial numbers (Applicability).","Dependence on an external mandatory manufacturer document: actions must follow BAe ASB 52-A-JA 911140 Revision 2 (Requirement).","Fixed compliance deadline and acknowledgment of prior compliance reduce administrative variability (Compliance / Note).","Minor amendment limited to removal of an incorrect diagram and dimensions in the Requirement Document (Background), not to substantive action.","Operational impact is limited but safety-critical: physical inspection/installation work on door mechanism (Background)."],"plain_english_summary":"This airworthiness directive requires operators of British Aerospace Jetstream Model 3100 and 3200 aeroplanes (with specific main passenger/crew door serial numbers) to carry out the work set out in BAe Mandatory ASB 52-A-JA 911140 Revision 2. It fixes an omitted taper pin in the door locking mechanism whose absence can loosen the outer handle indicator and prevent opening the door from the outside; operators must complete the mandated action by 31 July 1992 unless already done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin","history":"/api/acts/ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin/history","analysis":"/api/acts/ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin/analysis","conflicts":"/api/acts/ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin/conflicts","importantCases":"/api/acts/ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin/important-cases","documents":"/api/acts/ad-jetstream-53-amdt-1-door-locking-mechanism-taper-pin/documents"}}