{"id":"F2006B03876","name":"AD/BEECH 36/21 Amdt 1 - Aft Facing Seat Back Supports","slug":"ad-beech-36-21-amdt-1-aft-facing-seat-back-supports","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43485,"registerId":"commonwealth-F2006B03876-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 36/21 Amdt 1 - Aft Facing Seat Back Supports","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 36 (Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 36/21\n\nAmdt 1\n\n\nAft Facing Seat Back Supports 7/74\n\n \n\nApplicability: All models 36 and A36 equipped with optional aft facing seats. Requirement: Action in accordance with Beechcraft SI No. 0591-314.\n\nCompliance: Within 100 hours time in service after 31 December 1973.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a straightforward safety directive with narrow, specific applicability. It has not expanded beyond its original purpose of addressing a specific airworthiness concern with seat back supports in particular aircraft models."},"complexity_factors":["Very short document (under 200 words)","Only 4 defined elements: applicability, requirement, compliance, and reference to external document","Single condition: presence of optional aft-facing seats","No nested exceptions or conditional logic","References only one external technical document (Beechcraft SI No. 0591-314)","Clear, unambiguous compliance deadline"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Beechcraft Bonanza aircraft** (models 36 and A36) that have optional rear-facing seats installed.\n\n**What it requires:**\n- Aircraft owners/operators must follow the instructions in **Beechcraft Service Information Notice No. 0591-314** regarding the supports for the back of rear-facing seats.\n- This typically involves inspecting, modifying, or replacing parts to ensure the seat back supports meet safety standards.\n\n**Who must comply:**\n- Anyone operating a Beechcraft 36 or A36 with aft-facing (rear-facing) seats.\n\n**When:**\n- The work must be completed within **100 hours of flight time** after 31 December 1973.\n\n**Why it matters:**\n- This directive addresses a potential structural or safety defect in the seat back supports. Without compliance, the seats might fail in an emergency (such as sudden deceleration or turbulence), endangering passengers."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The document is presented as Amendment 1 of AD/BEECH 36/21, but the supplied text contains only the current applicability, requirement and compliance deadline. The text itself does not show the previous wording or indicate any expansion or narrowing of applicability. On the basis of the supplied material alone, there is no evidential basis to conclude the directive’s scope has changed from an earlier version."},"complexity_factors":["Short, narrowly targeted directive with a single required action (low document complexity) (Requirement).","Technical content is outsourced to a manufacturer service instruction (SI No. 0591-314), which requires obtaining and interpreting another technical document (adds moderate operational complexity) (Requirement).","Fixed compliance deadline tied to time-in-service tracking (administrative complexity: operators must compute and schedule within 100 hours after 31 Dec 1973) (Compliance).","Applicability limited to a subset of aircraft (those with optional aft-facing seats) — requires operators to identify affected airframes from the fleet (low complexity) (Applicability).","Regulatory placement in a Schedule of Airworthiness Directives implies regulatory enforcement structure, but enforcement details are not present in the text (uncertainty increases practical complexity)."],"plain_english_summary":"This AD requires Beechcraft Model 36 and A36 aeroplanes fitted with optional aft‑facing seats to have corrective/modification work done per Beechcraft Service Instruction No. 0591‑314 within 100 hours TIS after 31 December 1973. It binds owners/operators and maintenance providers (costs borne by the operator) and delegates technical detail to the manufacturer’s SI; the directive itself does not state the underlying hazard or cost estimates."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-36-21-amdt-1-aft-facing-seat-back-supports","history":"/api/acts/ad-beech-36-21-amdt-1-aft-facing-seat-back-supports/history","analysis":"/api/acts/ad-beech-36-21-amdt-1-aft-facing-seat-back-supports/analysis","conflicts":"/api/acts/ad-beech-36-21-amdt-1-aft-facing-seat-back-supports/conflicts","importantCases":"/api/acts/ad-beech-36-21-amdt-1-aft-facing-seat-back-supports/important-cases","documents":"/api/acts/ad-beech-36-21-amdt-1-aft-facing-seat-back-supports/documents"}}