{"id":"F2006B04074","name":"AD/BEECH 60/12 - Fuel Vent Heater Wiring","slug":"ad-beech-60-12-fuel-vent-heater-wiring","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":43730,"registerId":"commonwealth-F2006B04074-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/BEECH 60/12 - Fuel Vent Heater 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 60/12 Fuel Vent Heater Wiring 9/71\n\nApplicability: All models fitted with electrical fuel vent heaters.\n\nRequirement: 1. Disconnect the electrical power supply to both fuel vent heaters and install a warning placard or tag indicating system is inoperative.\n\nNote: If this is accomplished by tripping the appropriate circuit breaker, a clip must be placed over the shank of the circuit breaker to prevent inadvertent resetting.\n\n    2. Inspect the fuel vent heater electric wiring in the wing area for signs of chafing.\n\n    3. Either secure the wiring to prevent chafing or cover the wiring with plastic sleeving to prevent chafing.\n\nCompliance: Para. 1 \\- Within 10 hours’ time in service after 30 September 1971\n\nParas. 2 and 3 \\- Before reconnecting the fuel vent heaters to the electrical power supply.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1833},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope from 1971: addressing a specific wiring chafing defect in fuel vent heaters for Beechcraft 60 aircraft. No evidence of expansion beyond the initial safety purpose."},"complexity_factors":["Document contains only 3 substantive requirements with linear sequencing","No definitions section or specialized interpretation clauses","Simple applicability test (single aircraft type with specific equipment)","No cross-references to other legislation or regulatory instruments","Clear, unconditional compliance triggers without nested exceptions"],"plain_english_summary":"This mandatory Airworthiness Directive requires owners/operators of Beechcraft 60 (Duke) aircraft with electrical fuel vent heaters to immediately disable the heaters and tag them inoperative, inspect wing wiring for chafing, and protect or secure any wiring found so it cannot rub on structure. Power may only be restored after inspection and repairs. The measures address a fire/explosion risk from heater wiring contacting fuel-vapor areas and must be done within 10 hours' flight time after 30 September 1971."}},"importantCases":[],"_links":{"self":"/api/acts/ad-beech-60-12-fuel-vent-heater-wiring","history":"/api/acts/ad-beech-60-12-fuel-vent-heater-wiring/history","analysis":"/api/acts/ad-beech-60-12-fuel-vent-heater-wiring/analysis","conflicts":"/api/acts/ad-beech-60-12-fuel-vent-heater-wiring/conflicts","importantCases":"/api/acts/ad-beech-60-12-fuel-vent-heater-wiring/important-cases","documents":"/api/acts/ad-beech-60-12-fuel-vent-heater-wiring/documents"}}