{"id":"F2006B07442","name":"AD/TPE 331/32 - Rear Turbine Bearing Oil Supply Tube Inspection/Replacement","slug":"ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":49746,"registerId":"commonwealth-F2006B07442-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/TPE 331/32 - Rear Turbine Bearing Oil Supply Tube Inspection/Replacement","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nAlliedSignal (Garrett/AiResearch) Turbine Engines \\- TPE 331 Series\n\nAD/TPE 331/32 Rear Turbine Bearing Oil Supply Tube\n\nInspection/Replacement\n\n  \n3/86\n\nApplicability: The following listed Garrett Model engines which have rear turbine oil supply tube Pt. No. 3102123-1 fitted and which are not in compliance with BAe MOD JM 7388 TPE 331-10UF-501H, -511H, -512H, -513H TPE 331-10UR-513H.\n\nRequirement: PART 1 \\- Inspect for adequate clearance between oil supply tube PT. No. 3102123-1 and bleed air cooler in accordance with British Aerospace Alert SB 71-A-JM 7418 Part A.\n\nPART 2 \\- Modify in accordance with BAe Alert SB 71-A-JM 7418 Part B. Garrett Turbine Engine Company SB TPE 331-79-0013 refers, or AD/AIR-T/50\n\nCompliance: PART 1 \\- Unless already accomplished, within 50 hours time in service after 30 June 1984 and thereafter at intervals not exceeding 400 hours time in service until modified.\n\nPART 2 \\- Prior to 31 August 1984.\n\nNote: For aircraft/engine combinations incorporating BAe MOD No. JM 7388 compliance with this Directive is not applicable.\n\nBackground: Chafing of oil supply tube could lead to loss of oil and subsequent engine failure.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2485},"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope addressing the specific mechanical defect of oil tube chafing in identified engine models. It has not expanded beyond this particular safety issue."},"complexity_factors":["Technical aviation terminology and specific part numbers (e.g., 'Pt. No. 3102123-1', 'bleed air cooler')","Cross-references to external technical service bulletins (British Aerospace Alert SB 71-A-JM 7418, Garrett SB TPE 331-79-0013)","Dual compliance structure with different deadlines for inspection versus modification","Specific applicability criteria based on engine model numbers and previous modification status"],"plain_english_summary":"Mandatory airworthiness directive requires operators of certain Garrett TPE 331 engines lacking BAe MOD JM 7388 to inspect clearance between an oil-feed tube and the bleed-air cooler and to install a permanent modification to stop rubbing that can wear a hole, cause oil leakage, and lead to engine failure. Inspections are required within 50 flight hours after 30 June 1984 and every 400 hours until the modification is installed; the modification must be completed by 31 August 1984."}},"importantCases":[],"_links":{"self":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement","history":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement/history","analysis":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement/analysis","conflicts":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement/conflicts","importantCases":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement/important-cases","documents":"/api/acts/ad-tpe-331-32-rear-turbine-bearing-oil-supply-tube-inspection-replacement/documents"}}