{"id":"F2006B03622","name":"AD/BEECH 18/23 - Pilot Seats - Reinforcement","slug":"ad-beech-18-23-pilot-seats-reinforcement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43213,"registerId":"commonwealth-F2006B03622-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 18/23 - Pilot Seats - Reinforcement","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 18 Series Aeroplanes\n\nAD/BEECH 18/23 Pilot Seats \\- Reinforcement 1/84\n\nApplicability: All model 18 aircraft equipped with A.M.I. seats model 716-1,-2,-11, \\-12, \\-21 and \\-22\n\nand Model 865-1 to \\-9 and-11.\n\nRequirement: Reinforce pilot seat frame assembly P/N 865J10005-1 by installation of A.M.I. Industries, Inc., seat frame brace kit P/N 865K90000-1 I.A.W. A.M.I. Industries, Inc., service bulletin No 25-10-865-01, dated 31 January, 1983.\n\nNote: FAA AD 83-21-06 refers.\n\nCompliance: Unless previously accomplished, before 30 April 1984.\n\nBackground: A case occurred where failure of the pilots seats during a survivable emergency landing contributed to occupant injury. Subsequent T.S.O. tests verified failure of the seat frame at loads below the 9g. forward requirement.\n\nFederal Register of Legislative Instruments F2006B03622","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, original airworthiness directive with a narrow, specific safety purpose. It has not expanded beyond its original intent to mandate a specific seat reinforcement for crashworthiness."},"complexity_factors":["Single, specific technical requirement with clear part numbers and reference document","Narrow applicability limited to specific aircraft model and seat variants","No conditional logic, exceptions, or nested provisions","Single compliance deadline with straightforward 'unless previously accomplished' carve-out","Minimal cross-referencing (only to FAA AD and manufacturer service bulletin for technical details)","No defined terms section — uses standard aviation terminology"],"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). Think of it as a \"recall notice\" for aircraft, but legally binding.\n\n**What it does:** It requires owners and operators of specific **Beechcraft 18 series aeroplanes** to strengthen the pilot seats. The seats, made by A.M.I. Industries, have been found to fail during emergency landings at forces lower than the safety standard requires (specifically, below the 9g forward force requirement — meaning they can't withstand the impact of a crash as well as they should).\n\n**Who must act:** Anyone who owns or operates a Beechcraft Model 18 aircraft fitted with specific A.M.I. seat models (716 series and 865 series).\n\n**What they must do:** Install a reinforcement kit (part number 865K90000-1) to the pilot seat frame, following the manufacturer's service bulletin instructions.\n\n**When:** The work had to be completed before 30 April 1984 (unless already done).\n\n**Why it matters:** This directive prevents pilot seat collapse during emergency landings. The background notes a real incident where seat failure caused injuries in what should have been a survivable crash. The fix ensures seats meet crashworthiness standards and protect occupants when it counts most."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive applies to the seat models and airframes listed and requires a specific reinforcement action by a fixed date. The text confines the measure to those aircraft and seats and specifies the exact kit and service bulletin to use (Applicability; Requirement; Compliance). There is no indication within the instrument that its scope was expanded beyond that original, stated remedial objective (Background)."},"complexity_factors":["Narrow technical scope — single retrofit action (install one specific brace kit) with explicit part number and service bulletin (Requirement).","Limited applicability — only applies to Beechcraft 18 aircraft with enumerated A.M.I. seat models (Applicability).","Fixed compliance deadline — a single compliance date reduces procedural complexity (Compliance).","Dependency on external technical document and a single supplier’s kit increases logistical complexity (Requirement; Note).","Regulatory enforcement, certification of completion and supply logistics are not detailed in the AD, leaving operational implementation questions to operators and the regulator (Requirement; Compliance)."],"plain_english_summary":"This AD mandates that owners/operators of specified Beechcraft 18s fitted with listed A.M.I. seats install A.M.I. seat‑frame brace kit P/N 865K90000‑1 per A.M.I. Service Bulletin No. 25‑10‑865‑01 by 30 April 1984 to address a demonstrated seat‑frame weakness that contributed to injury in an emergency landing.  \n\nOperators pay for parts and labour; the directive prescribes a single kit and service bulletin, concentrating compliance demand and limiting alternative technical solutions."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-18-23-pilot-seats-reinforcement","history":"/api/acts/ad-beech-18-23-pilot-seats-reinforcement/history","analysis":"/api/acts/ad-beech-18-23-pilot-seats-reinforcement/analysis","conflicts":"/api/acts/ad-beech-18-23-pilot-seats-reinforcement/conflicts","importantCases":"/api/acts/ad-beech-18-23-pilot-seats-reinforcement/important-cases","documents":"/api/acts/ad-beech-18-23-pilot-seats-reinforcement/documents"}}