{"id":"F2006B03666","name":"AD/BEECH 1900/8 Amdt 1 - Pilot and Co-Pilot Chair Locking Mechanism","slug":"ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43256,"registerId":"commonwealth-F2006B03666-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 1900/8 Amdt 1 - Pilot and Co-Pilot Chair Locking Mechanism","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)  \nBeechcraft 1900 Series Aeroplanes\n\nAD/BEECH 1900/8\n\nAmdt 1\n\n  \nPilot and Co-Pilot Chair Locking Mechanism 7/97\n\nApplicability: Models Serial Numbers\n\n1900 Airliner, 1900C, and 1900D.\n\n  \nUA-1 through UA-3, UB-1 through UB-74, UC-1 through UC-174, and UE-1 through UE-17.\n\nRequirement: a. Inspect the pilot and co-pilot chairs to assure that the locking pins will fully engage in the seat tracks, in accordance with the “Accomplishment Instructions” section of Beech Service Bulletin 2444 Revision II.\n\nb. Modify any chair where the locking pin fails to fully engage or is misaligned, in accordance with the maintenance manual as specified in Beech Service Bulletin 2444, Revision II.\n\nNote: FAA AD 97-06-06 Amdt 39-9963 refers.\n\nCompliance: Unless already accomplished, within 150 hours time in service after 19 June 1997.\n\nThis amendment becomes effective on 19 June 1997.\n\nBackground: The FAA received reports of pilot and co-pilot chair locking pin malfunctions, which in one instance caused the pilot chair to slide back from the full forward position.\n\nAmendment 1 is issued in response to a new FAA AD which requires the inspection to be accomplished in accordance with revised service information, as reflected in Revision II of the requirement document.\n\nThe original issue of this airworthiness directive became effective on 1 April 1993.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":4,"scope_assessment":{"changed":false,"description":"Amendment 1 updates the required compliance reference to Beech Service Bulletin 2444 Revision II (per FAA AD) and reissues the inspection/modification requirement. It does not expand the set of affected models/serials or alter the fundamental requirement to inspect and correct non‑engaging locking pins; the change is procedural (revised service information), not a material scope expansion."},"complexity_factors":["Technical maintenance action requiring conformity with Beech Service Bulletin 2444 Revision II (Requirement).","Applicability limited to specific models and serial-number ranges, requiring careful operator identification (Applicability).","Hard compliance deadline: within 150 hours time-in-service after 19 June 1997, creating scheduling and operational downtime pressures (Compliance).","Cross-reference to FAA AD 97-06-06 and earlier AD history, obliging harmonisation with foreign airworthiness guidance (Note/Background).","Corrective modification must follow the aircraft maintenance manual as specified, demanding qualified maintenance personnel and possible parts or adjustments (Requirement b).","Amendment updates the required service information to Revision II, adding a version-control verification task for maintainers and regulators (Amendment 1).","Limited operator discretion: mandatory inspection and mandatory modification if defect found, so costs fall on operators/owners and there is little flexibility in compliance approach."],"plain_english_summary":"This directive requires operators of Beechcraft 1900 series aeroplanes (specified serial ranges) to inspect pilot and co‑pilot seat locking pins and to modify any pin or alignment that prevents full engagement, following Beech Service Bulletin 2444 Revision II. Operators/owners must perform and pay for the inspection and any corrective work within 150 hours time-in-service after 19 June 1997; the measure responds to reports of seats sliding from the forward position, a flight-safety risk."},"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"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope of the 1993 airworthiness directive. It updates the technical reference to a revised manufacturer service bulletin (Revision II) but does not expand the applicability, add new requirements, or broaden the regulatory reach. The amendment remains tightly focused on the specific seat locking mechanism issue for the identified Beechcraft 1900 series aircraft."},"complexity_factors":["Single, specific technical requirement with clear applicability criteria (specific aircraft models and serial numbers)","Only two operative paragraphs (inspection and modification) plus a cross-reference to FAA AD","No defined terms section — uses standard aviation terminology","Simple compliance deadline structure (150 hours time in service)","Minimal conditional logic (only 'unless already accomplished' exception)","Short document (approximately 200 words of substantive content)"],"plain_english_summary":"This safety order requires operators of certain Beechcraft 1900 (Airliner, 1900C, 1900D) aircraft to inspect pilot and co‑pilot seats to ensure seat‑track locking pins fully engage, and to modify any seats with misaligned or non‑engaging pins. It responds to reports of in‑flight seat movement, matters for flightcrew safety, and updates the original 1993 directive to follow Beech Service Bulletin 2444, Revision II. Compliance: within 150 flight hours after 19 June 1997."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism","history":"/api/acts/ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism/history","analysis":"/api/acts/ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism/analysis","conflicts":"/api/acts/ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism/conflicts","importantCases":"/api/acts/ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism/important-cases","documents":"/api/acts/ad-beech-1900-8-amdt-1-pilot-and-co-pilot-chair-locking-mechanism/documents"}}