{"id":"F2006B04234","name":"AD/BEECH 90/43 - Seat Locking Pins - Replacement","slug":"ad-beech-90-43-seat-locking-pins-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43996,"registerId":"commonwealth-F2006B04234-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 90/43 - Seat Locking Pins - Replacement","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Beechcraft 90 and 65-90 (King Air) Series Aeroplanes\n\n \n\nAD/BEECH 90/43 Seat Locking Pins - Replacement 5/76\n\nApplicability: Model C90 with S/Nos. LJ-654, LJ-674 to LJ-676; Model E90 with S/Nos. LW-134, LW-157 to LW-163.\n\n \n\nDocument: 1. Beechcraft SI No. 0789-314; or\n\n \n\n2. FAA AD 76-04-02.\n\n \n\nCompliance: Within 100 hours’ time in service after 31 May 1976.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument, as supplied, sets a specific mandatory action (replacement of seat locking pins) for a narrowly defined set of serial-numbered aircraft, and prescribes the acceptable technical references and a single compliance deadline. There is no indication in the supplied text that the scope was altered from an earlier or original statement; the AD stands as a targeted, time-limited requirement applying only to the listed aircraft. (See Applicability; Document; Compliance.)"},"complexity_factors":["Narrow applicability limited to a few specific serial-numbered aircraft (reduces scope complexity).","Single, short compliance window (100 hours after 31 May 1976) simplifies scheduling but creates time pressure.","Technical method is not included in the text and is delegated to two external documents (Beechcraft SI No. 0789-314 or FAA AD 76-04-02), requiring users to obtain and follow those documents.","No procedural detail, parts list, or explicit safety rationale in the AD text increases reliance on the referenced documents for implementation and verification."],"plain_english_summary":"This AD mandates replacement of seat‑locking pins on specific Beechcraft 90-series aeroplanes (listed serial numbers), to be completed within 100 hours’ time‑in‑service after 31 May 1976. Owners/operators must carry out and pay for the work using either Beechcraft Service Instruction No. 0789‑314 or FAA AD 76‑04‑02. The AD sets the obligation and timing but does not include the technical procedure or safety rationale."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive targeting a specific mechanical defect in specific aircraft. It has not expanded beyond its original purpose of mandating seat locking pin replacement."},"complexity_factors":["Extremely short document (approximately 150 words)","Only 2 defined applicability criteria (specific aircraft models and serial numbers)","Simple binary compliance pathway (two alternative documents to follow)","Single, unambiguous deadline (100 hours time-in-service after fixed date)","No cross-references to other legislation beyond the two named technical documents","No conditional logic, exceptions, or nested provisions"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA) that requires specific repairs or inspections on aircraft.\n\n**What it does:** It orders owners and operators of certain **Beechcraft King Air aeroplanes** (specifically Model C90 with serial numbers LJ-654 and LJ-674 through LJ-676, plus Model E90 with serial numbers LW-134 and LW-157 through LW-163) to **replace the seat locking pins** on their aircraft.\n\n**Why it matters:** Seat locking pins keep passenger and crew seats securely attached to the aircraft floor. If these pins fail, seats could break loose during turbulence or emergency situations, causing serious injury or interfering with aircraft controls.\n\n**What must be done:** Operators must follow either:\n- Beechcraft Service Instruction No. 0789-314, **or**\n- FAA Airworthiness Directive 76-04-02 (the equivalent US safety order)\n\n**When:** The replacement must be completed **within 100 hours of flying time** after 31 May 1976.\n\n**Who it affects:** Owners and operators of specific Beechcraft 90-series King Air aircraft built in the mid-1970s."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-90-43-seat-locking-pins-replacement","history":"/api/acts/ad-beech-90-43-seat-locking-pins-replacement/history","analysis":"/api/acts/ad-beech-90-43-seat-locking-pins-replacement/analysis","conflicts":"/api/acts/ad-beech-90-43-seat-locking-pins-replacement/conflicts","importantCases":"/api/acts/ad-beech-90-43-seat-locking-pins-replacement/important-cases","documents":"/api/acts/ad-beech-90-43-seat-locking-pins-replacement/documents"}}