{"id":"F2006B04105","name":"AD/BEECH 60/44 - Cabin Heat Electrical Wiring","slug":"ad-beech-60-44-cabin-heat-electrical-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43787,"registerId":"commonwealth-F2006B04105-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 60/44 - Cabin Heat Electrical Wiring","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 60 (Duke) Series Aeroplanes\n\nAD/BEECH 60/44 Cabin Heat Electrical Wiring 4/99 DM\n\nApplicability: Beech Model 60 aeroplanes with serial numbers P-159 and P-166 up to and including P-596.\n\nRequirement: Modify the cabin heat control electrical wiring in accordance with the Accomplishment Instructions of Raytheon Mandatory Service Bulletin SB 24-3097 issued December 1998.\n\nNote: FAA AD 99-03-11 Amdt 39-11024 refers.\n\nCompliance: Within 25 hours’ time in service after the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 3 March 1999.\n\nBackground: The FAA has received a report of an incident where the cabin heater electrical control circuits overheated in flight and caused the cabin heater to shut down. This Directive requires modifications to the cabin heater wiring which are designed to prevent the circuit overheating, which could result in smoke and/or fire.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive addressing a specific safety defect in specific aircraft. It has not expanded beyond its original purpose of mandating a wiring modification to prevent cabin heater overheating."},"complexity_factors":["Very short document (approximately 150 words)","Only 1 defined term (Applicability range)","Single, unambiguous requirement with clear reference to external technical document (Service Bulletin SB 24-3097)","No nested conditions or exceptions","Simple compliance deadline (25 hours time in service)","Straightforward applicability criteria (specific serial number range)"],"plain_english_summary":"This is a **safety order for specific Beechcraft aeroplanes**.\n\n**What it does:**\nThis document is an **Airworthiness Directive (AD)** — a mandatory safety instruction issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of certain Beechcraft Model 60 (Duke) aeroplanes to modify the electrical wiring that controls the cabin heater.\n\n**Who it affects:**\n- **Aircraft owners/operators** of Beech Model 60 aeroplanes with serial numbers P-159, P-166, and P-167 through P-596\n- **Maintenance engineers** who must carry out the modification\n\n**What must be done:**\nThe wiring must be modified following specific instructions in **Raytheon Service Bulletin SB 24-3097** (issued December 1998). This involves changing how the cabin heater's electrical control circuits are wired.\n\n**When it must be done:**\nWithin **25 hours of flying time** after 3 March 1999.\n\n**Why it matters:**\nThe FAA (American aviation regulator) reported an incident where the cabin heater's electrical circuits overheated during flight, causing the heater to fail. Without this fix, the wiring could overheat, potentially causing **smoke or fire in the cockpit** — a serious flight safety risk.\n\n**Key point:** This is not optional. Airworthiness Directives are legally binding safety requirements. Non-compliance means the aircraft cannot legally fly."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive is targeted and prescriptive: it applies only to specified Beech Model 60 serial numbers and requires a single wiring modification per Raytheon SB 24-3097 within 25 hours’ time in service. The text shows no indication that the scope was broadened or narrowed from that stated purpose; it remains limited to the aircraft and corrective action set out in the AD. (Applicability; Requirement; Compliance)"},"complexity_factors":["Narrow applicability: limited to specific Beech Model 60 serial numbers (reduces scope). (Applicability)","Single, prescriptive technical action: modification must follow Raytheon Mandatory Service Bulletin SB 24-3097 (centralises technical detail outside the AD). (Requirement)","Short compliance window: requires completion within 25 hours’ time in service after effective date, imposing scheduling pressure on operators. (Compliance)","Cross-reference to external documents: relies on a manufacturer service bulletin and references an FAA AD, so understanding/implementation requires consulting those documents. (Requirement; Note)","Operational impact concentrated on owners/operators who must arrange and fund the work; the AD does not specify service providers or costs. (Applicability; Compliance)"],"plain_english_summary":"This Directive requires a specific wiring modification to the cabin heat control on Beechcraft Model 60 (Duke) aeroplanes (S/N P‑159 and P‑166 through P‑596) exactly per Raytheon SB 24‑3097, to be completed within 25 flight hours after the AD’s 3 March 1999 effective date. It was issued to prevent heater‑circuit overheating (smoke/fire); aircraft owners/operators must arrange and pay for the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-60-44-cabin-heat-electrical-wiring","history":"/api/acts/ad-beech-60-44-cabin-heat-electrical-wiring/history","analysis":"/api/acts/ad-beech-60-44-cabin-heat-electrical-wiring/analysis","conflicts":"/api/acts/ad-beech-60-44-cabin-heat-electrical-wiring/conflicts","importantCases":"/api/acts/ad-beech-60-44-cabin-heat-electrical-wiring/important-cases","documents":"/api/acts/ad-beech-60-44-cabin-heat-electrical-wiring/documents"}}