{"id":"F2006B08633","name":"AD/CON/51 - Turbocharger Check Valve and Hose Clamps","slug":"ad-con-51-turbocharger-check-valve-and-hose-clamps","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51634,"registerId":"commonwealth-F2006B08633-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CON/51 - Turbocharger Check Valve and Hose Clamps","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)  \nTeledyne Continental Motors Piston Engines\n\nAD/CON/51 Turbocharger Check Valve and Hose Clamps 11/87\n\nApplicability: TELEDYNE CONTINENTAL MOTORS MODELS:\n\nTSIO-360GB \\- all TSIO-360LB (new) \\- all through S/N 316128 TSIO-360LB\n\n(rebuilt) \\- all through S/N 247112 TSIO-360MB \\- all through S/N 317141.\n\nRequirement: 1. Inspect the clamps retaining the turbocharger check valves and hoses for deterioration of the rubber cushioning, and replace if deteriorated.\n\n2. If clamp rubber cushion was deteriorated inspect the check valve or hose where the clamp was fitted to ensure the clamp metal band did not cause chafing. If found chafed the valve(s) or hose must be replaced.\n\nCompliance: Prior to the issue of the next maintenance release after 31 October 1987 and thereafter at each issue of a new maintenance release.\n\nNote: Replacement of subject clamps having a cushion that is black in colour, with new clamps that incorporate a cushion that is yellow in colour is a requirement of TCM Service Bulletin No. M87-14, and constitutes terminating action.\n\nBackground: The manufacturer has found that premature deterioration of the clamp rubber cushions can allow the clamp metal band to chafe, and wear through the check valve(s) or hose and cause oil exhaustion. TCM Service Bulletin No. 87-14 introduces new clamps with oil and fuel resistant rubber cushioning.","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive enforces inspections and replacements for the specific engines and parts named and implements the manufacturer’s Service Bulletin as terminating action; it does not expand scope beyond the listed models, serial numbers, and the manufacturer’s recommended remedy."},"complexity_factors":["Narrow technical scope: applies only to specified TCM TSIO‑360 models and serial-number ranges.","Simple required actions: inspect cushions; replace deteriorated clamps; replace chafed valves/hoses.","Compliance timing tied to existing maintenance releases (administrative clarity).","Terminating action available via Service Bulletin M87‑14 (one-time replacement option).","Some on‑site judgment required by maintenance staff to determine 'deterioration' and 'chafing' (subjective assessment).","Potential downstream cost if chafing is found and valves/hoses require replacement."],"plain_english_summary":"This Airworthiness Directive requires operators of the listed Teledyne Continental TSIO‑360 engine variants to inspect turbocharger check‑valve clamps and their rubber cushioning at each maintenance release after 31 October 1987, replacing any deteriorated cushions and any check valves or hoses damaged by clamp chafing. Replacing the clamps with the new yellow‑cushion design specified in TCM Service Bulletin M87‑14 ends the recurring inspection requirement. The manufacturer says the change prevents clamp metal bands from wearing through valves or hoses and causing oil loss; operators and maintenance staff bear the inspection and replacement costs."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted airworthiness directive addressing a specific mechanical defect in specific engine models. It has not expanded beyond its original safety purpose."},"complexity_factors":["Single, discrete maintenance task with clear sequential steps","Only 4 defined engine models with specific serial number cutoffs","Simple conditional logic: if rubber deteriorated → replace clamp; if chafing found → replace valve/hose","No cross-references to other legislation or regulations beyond the parent Civil Aviation Regulations 1988","Single compliance deadline with straightforward recurring requirement","Background section provides clear rationale without legal caveats"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators and maintenance engineers to inspect and replace deteriorated rubber cushions on hose clamps at turbocharger check valves of certain Teledyne Continental TSIO-360GB/LB/MB engines to prevent clamp chafing that can cause oil leaks and possible engine failure. Replacing damaged hoses or valves is required where chafing occurred, and installing the manufacturer’s yellow‑cushioned clamps (Service Bulletin M87‑14) provides a permanent compliance option."}},"importantCases":[],"_links":{"self":"/api/acts/ad-con-51-turbocharger-check-valve-and-hose-clamps","history":"/api/acts/ad-con-51-turbocharger-check-valve-and-hose-clamps/history","analysis":"/api/acts/ad-con-51-turbocharger-check-valve-and-hose-clamps/analysis","conflicts":"/api/acts/ad-con-51-turbocharger-check-valve-and-hose-clamps/conflicts","importantCases":"/api/acts/ad-con-51-turbocharger-check-valve-and-hose-clamps/important-cases","documents":"/api/acts/ad-con-51-turbocharger-check-valve-and-hose-clamps/documents"}}