{"id":"F2006B03824","name":"AD/BEECH 35/23 - Heater Installation","slug":"ad-beech-35-23-heater-installation","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43420,"registerId":"commonwealth-F2006B03824-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 35/23 - Heater Installation","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 35 (Bonanza) Series Aeroplanes\n\n \n\nAD/BEECH 35/23 Heater Installation 2/69\n\nApplicability: All models fitted with Hanlon and Wilson heater-muffler P/N 8046-1. Requirement:  Action in accordance with Beechcraft SI No. 0096-412.\n\nCompliance: Within 100 hours time in service after 14 February 1969 and thereafter at intervals not exceeding 100 hours time in service.\n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a vintage 1969 Airworthiness Directive that has remained unchanged in scope. It addresses a specific, narrow safety issue (heater-muffler integrity) for a defined aircraft fleet. There is no evidence of scope creep; the directive maintains its original limited purpose of mandating recurring inspections for carbon monoxide and fire risk prevention."},"complexity_factors":["Very short document (under 150 words)","Only 1 defined term requiring external reference (the Beechcraft Service Instruction)","Single applicability criterion (specific part number)","Simple compliance structure: one-time initial deadline + recurring interval","No nested exceptions, conditional logic, or cross-references to other legislation","Self-contained — does not require reading other CASR Parts to understand obligations"],"plain_english_summary":"This is an **Airworthiness Directive (AD)** — essentially a mandatory safety notice issued by Australia's Civil Aviation Safety Authority (CASA). It applies to specific **Beechcraft 35 (Bonanza) aircraft** that have a particular type of cabin heater installed (the Hanlon and Wilson heater-muffler, part number 8046-1).\n\n**What it requires:**\n- Aircraft owners/operators must follow the instructions in **Beechcraft Service Instruction No. 0096-412** — a technical document from the manufacturer detailing inspection or maintenance procedures for this heater.\n\n**When it must be done:**\n- First compliance: Within **100 hours of flying time** after 14 February 1969\n- Ongoing: Repeated **every 100 hours of flying time** thereafter\n\n**Why it matters:**\nHeater-mufflers combine exhaust systems with cabin heating. Failures can cause **carbon monoxide poisoning** or **fire** — both potentially fatal at altitude. This AD mandates regular inspection to catch dangerous wear or corrosion before it causes an accident.\n\nThis is a **recurring maintenance requirement**, not a one-off fix. It stays in force until formally cancelled or superseded."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is confined to Beechcraft 35 series aeroplanes fitted with heater-muffler P/N 8046-1 and mandates actions in Beechcraft SI No. 0096-412 at 100-hour intervals beginning within 100 hours after 14 February 1969. The published text contains no indication of an expanded or reduced scope compared with the statement in this instrument; it neither adds exemptions nor extends applicability beyond the aircraft and part-number identified. (Applicability; Requirement; Compliance)"},"complexity_factors":["Narrow applicability limited to aircraft fitted with Hanlon and Wilson heater-muffler P/N 8046-1 (straightforward identification). (Applicability)","Mandates compliance with an external technical document (Beechcraft SI No. 0096-412), requiring operators to obtain and follow that document. (Requirement)","Fixed, frequent compliance interval (every 100 hours time in service) requires scheduling recurring maintenance. (Compliance)","No technical detail in the directive itself — interpretation and operational detail depend on the referenced Service Instruction, creating a dependence on an external source.","Regulatory basis is clear (Schedule of Airworthiness Directives), so limited administrative discretion in applicability and timing but some practical discretion in how operators schedule and perform the work. (header; Applicability; Compliance)"],"plain_english_summary":"This airworthiness directive makes compliance with Beechcraft Service Instruction No. 0096‑412 mandatory for Beechcraft 35 (Bonanza) aeroplanes fitted with a Hanlon & Wilson heater‑muffler, P/N 8046‑1. Owners/operators must have the specified maintenance/modification done (first within 100 hours TIS after 14 Feb 1969 and then every 100 hours) and bear the associated costs. The CASA issues and enforces the mandatory timing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-35-23-heater-installation","history":"/api/acts/ad-beech-35-23-heater-installation/history","analysis":"/api/acts/ad-beech-35-23-heater-installation/analysis","conflicts":"/api/acts/ad-beech-35-23-heater-installation/conflicts","importantCases":"/api/acts/ad-beech-35-23-heater-installation/important-cases","documents":"/api/acts/ad-beech-35-23-heater-installation/documents"}}