{"id":"F2006B05681","name":"AD/PA-30/7 - Cabin Heater - Inspection","slug":"ad-pa-30-7-cabin-heater-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":135438,"registerId":"commonwealth-F2006B05681-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PA-30/7 - Cabin Heater - Inspection","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)  \nPiper PA-30 & 39 (Twin Comanche) Series Aeroplanes\n\nAD/PA-30/7 Cabin Heater \\- Inspection 8/69\n\nApplicability: All models fitted with Stewart-Warner “Southwind” model 940 series cabin heaters. Requirement: 1. Remove the heater exhaust tube shroud and determine by means of a magnet if the\n\nStewart-Warner P/N 286238 (Piper P/N 754708) exhaust extension is mild steel\n\n(magnetic) or stainless steel (non-magnetic). Mild steel extensions shall be replaced with stainless steel extensions except that, where spare stain- less steel parts are not immediately available, new or non- deteriorated mild steel extensions may continue to be used subject to visual inspection for deterioration in the form of cracking, rusting or flaking at intervals not exceeding 25 hours time in service.\n\n2. Overhaul and test the heater in accordance with the procedures laid down in Stewart-Warner Service Manual PM-10035 dated July 1966; or\n\n3. FAA AD 69-13-3.\n\nCompliance: For Para. 1 \\- Within 25 hours time in service after 11 August 1969.\n\nFor Para. 2 - For heaters having 900 hours or more total time in service as at 11 August 1969: Within 100 hours time in service after 11 August 1969 unless already accomplished within the last 400 hours time in service and thereafter at intervals not exceeding 500 hours time in service.\n\nFor heaters having less than 900 hours total time in service as at 11 August 1969: Prior to the accumulation of 1000 hours total time in service and thereafter at intervals not exceeding 500 hours time in service.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2096},"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This is a targeted airworthiness directive addressing a specific safety defect in exhaust extension tubes. The scope remains strictly limited to inspection and maintenance requirements for Stewart-Warner model 940 series heaters installed on Piper PA-30 and PA-39 aircraft."},"complexity_factors":["Three alternative compliance paths (magnet inspection/replacement, overhaul per specific manufacturer manual, or adherence to referenced FAA AD 69-13-3)","Conditional compliance deadlines based on accumulated flight hours (900-hour threshold) and historical cut-off dates","Technical material testing requirement (magnet test to distinguish ferrous from non-ferrous metals)","Specific manufacturer part number references (Stewart-Warner P/N 286238, Piper P/N 754708)","Cross-references to external technical documents (Stewart-Warner Service Manual PM-10035 dated July 1966)"],"plain_english_summary":"This AD requires owners/operators of Piper PA-30 and PA-39 Twin Comanche aircraft with Stewart‑Warner \"Southwind\" 940‑series cabin heaters to verify the exhaust extension material and either replace corrodible mild‑steel parts with stainless steel or follow a mandated inspection/overhaul regime. \n\nIt’s intended to prevent corrosion‑related cracks or leaks that could introduce carbon monoxide or cause fires, so affected operators must inspect, monitor, or overhaul heaters per the AD to ensure cabin safety."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-30-7-cabin-heater-inspection","history":"/api/acts/ad-pa-30-7-cabin-heater-inspection/history","analysis":"/api/acts/ad-pa-30-7-cabin-heater-inspection/analysis","conflicts":"/api/acts/ad-pa-30-7-cabin-heater-inspection/conflicts","importantCases":"/api/acts/ad-pa-30-7-cabin-heater-inspection/important-cases","documents":"/api/acts/ad-pa-30-7-cabin-heater-inspection/documents"}}