{"id":"F2006B03777","name":"AD/BEECH 300/6 - Cabin Seat Frame","slug":"ad-beech-300-6-cabin-seat-frame","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43373,"registerId":"commonwealth-F2006B03777-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 300/6 - Cabin Seat Frame","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 300 Series Aeroplanes\n\nAD/BEECH 300/6 Cabin Seat Frame 4/94\n\nApplicability: Model B300 with serial numbers FL-1 through FL-76.\n\nModel B300C with serial numbers FM-1, FM-2, and FM-3\n\nRequirement: 1. Inspect each cabin seat for cracks in accordance with the Accomplishment Instructions section of either Beech Service Bulletin 2443 or Tosington Service Bulletin 001, as applicable. If any crack is found, repair the crack in accordance with the applicable service bulletin referenced above; and,\n\n2. Modify the cabin seat frames by incorporating Beech Kit No. 303-307 in accordance with the actions specified in the Accomplishment Instructions section of either Beech Service Bulletin 2443 or Tosington Service Bulletin 001, as applicable.\n\nNote 1: Beech Service Bulletin 2443 and Tosington Enterprises Inc. Service Bulletin 001 specify procedures for determining whether Beech Kit 303-307 is installed on a cabin seat frame.\n\nNote 2: Each cabin seat has a placard on the lower seat frame that specifies whether the seat is manufactured by Gordon-Piatt Energy Group (Beech SB 2443) or Tosington Enterprises Inc. (Tosington SB 001).\n\nNote 3: FAA AD 94-01-01 Amdt 39-8782 refers.\n\nCompliance: Within 150 hours time in service after 31 March 1994.\n\nBackground: Inspection of affected in-service aircraft revealed an incidence of cracking of the cabin seats that did not have Beech Kit 303-307 incorporated.\n\nThis cracking was around the welded-in bushings, through which the bearing shafts are bolted to the frame, to retain the seat frame and belted occupant.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete airworthiness directive addressing a specific mechanical defect in specific aircraft models. It has not expanded beyond its original purpose of mandating seat frame inspections and modifications."},"complexity_factors":["Single, specific safety directive with clear mechanical requirements","Only 2 defined model variants with explicit serial number ranges","Straightforward two-step compliance: inspect/repair, then modify","Minimal cross-referencing — only refers to two alternative service bulletins and one FAA directive","No nested exceptions or conditional logic; applicability is determined by simple serial number matching","Clear compliance deadline (150 hours time in service after fixed date)"],"plain_english_summary":"This airworthiness safety order requires owners/operators of certain Beechcraft B300 and B300C aircraft (specific early serial numbers) to inspect cabin seat frames for cracks at welded bushings, repair any cracks immediately, and install Beech Kit No. 303-307 reinforcement. \n\nThe action — mandated within 150 flight hours after 31 March 1994 — addresses seats that could fail in turbulence/crash. Seat placards identify whether to follow the Gordon‑Piatt or Tosington service bulletin."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The instrument applies only to the listed B300 and B300C serial numbers and prescribes inspection, repair and kit installation per specified service bulletins. The text does not indicate any expansion or narrowing of that scope from a prior version within the supplied material."},"complexity_factors":["Narrow applicability: only specific serial-numbered Model B300 and B300C aircraft are affected (Applicability).","Two-step mandate: mandatory inspection for cracks and mandatory modification/kit incorporation if required (Requirement 1–2).","Dependency on external service bulletins for procedures: Beech SB 2443 and Tosington SB 001 prescribe how to inspect, identify kit fitment and carry out repairs/modification (Requirement; Notes 1–2).","Short compliance window: 150 flight hours from 31 March 1994 creates scheduling pressure (Compliance).","Need to identify seat manufacturer via placard to select correct service bulletin (Note 2) increases inspection complexity.","Potential procurement and labour burden to obtain and fit Beech Kit 303‑307 if not already installed (Requirement 2).","Technical risk: cracking occurs at welded-in bushings bearing shafts, requiring structural repair skills (Background).","Cross-reference to FAA AD adds another compliance/documentation thread (Note 3)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Beechcraft Model B300 (serials FL‑1 to FL‑76) and B300C (FM‑1 to FM‑3) to inspect cabin seat frames for cracks and, if cracks are found, repair them and install Beech Kit 303‑307 following Beech Service Bulletin 2443 or Tosington Service Bulletin 001 (Requirement 1–2; Notes). Compliance must occur within 150 flight hours after 31 March 1994. Operators pay for inspections, repairs and kit installation; the regulator (CASA) mandates the action and the operator must change maintenance practice accordingly."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-300-6-cabin-seat-frame","history":"/api/acts/ad-beech-300-6-cabin-seat-frame/history","analysis":"/api/acts/ad-beech-300-6-cabin-seat-frame/analysis","conflicts":"/api/acts/ad-beech-300-6-cabin-seat-frame/conflicts","importantCases":"/api/acts/ad-beech-300-6-cabin-seat-frame/important-cases","documents":"/api/acts/ad-beech-300-6-cabin-seat-frame/documents"}}