{"id":"F2006B08645","name":"AD/CON/68 - Incorrect Oil Pick-Up Tube","slug":"ad-con-68-incorrect-oil-pick-up-tube","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":51693,"registerId":"commonwealth-F2006B08645-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CON/68 - Incorrect Oil Pick-Up Tube","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/68 Incorrect Oil Pick-Up Tube 1/94\n\nApplicability: TCM O-470, IO-470, IO-520, TSIO-520 and IO-550 engines, as detailed by serial number in Teledyne Continental Motors Service Bulletin M91-10 Rev.1.\n\nNote: This Directive is only applicable to engines rebuilt or overhauled by the manufacturer Teledyne Continental Motors, Mobile Alabama USA, prior to November 1991.\n\nRequirement: Inspect the oil sump for evidence of an incorrect oil pick-up tube in accordance with the requirements of TCM Service Bulletin M91-10 Rev. 1. If an incorrect oil tube is installed, the oil tube and sump shall be replaced before further flight.\n\nNote: FAA Airworthiness Directive 93-08-17 refers.\n\nCompliance: Effective 6 January 1994:\n\n    Within 25 hours time in service.\n\n    2. Prior to installation in an aircraft.\n\nBackground: This Directive requires an inspection of the oil sump for evidence of an incorrect oil pick-up tube being fitted during assembly. The requirement follows advice of a number of engines released by the manufacturer with incorrect oil pick-up tubes fitted.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific manufacturing defect in specific engines. It has not expanded beyond its original purpose of ensuring correct oil pick-up tube installation in the affected TCM engines."},"complexity_factors":["Single, specific mechanical defect addressed (incorrect oil pick-up tube)","Clear applicability criteria limited to specific engine models and manufacturing timeframe","Straightforward two-part compliance requirement (inspect, then replace if needed)","Only one cross-reference to a manufacturer service bulletin and one FAA directive","No nested exceptions, conditional logic, or defined terms section","Document length is approximately 200 words"],"plain_english_summary":"This CASA Airworthiness Directive mandates inspection of the oil sump on certain Teledyne Continental Motors piston engines rebuilt/overhauled in Mobile, Alabama before November 1991 (specific serials per the manufacturer bulletin) because some were assembled with the wrong oil pick-up tube. Inspect per Service Bulletin M91‑10 Rev.1 and, if the incorrect tube is found, replace the tube and sump before next flight.\n\nAction is required within 25 flight hours after 6 Jan 1994 or before engine installation."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive's scope is confined to engines rebuilt or overhauled by Teledyne Continental Motors prior to November 1991 and to specific engine models/serial numbers listed in the manufacturer's service bulletin. It does not expand beyond that corrective, manufacturer-specific population."},"complexity_factors":["Narrow, model- and serial-number-based applicability to specific TCM engine types (O-470, IO-470, IO-520, TSIO-520, IO-550).","Dependence on manufacturer Service Bulletin M91-10 Rev.1 for the inspection procedure and identification of affected serial numbers.","Two-tiered compliance timing: within 25 hours time-in-service or prior to installation in an aircraft.","Mandatory remedial action (replace oil tube and sump) before further flight if defect is found.","Limited historical scope (engines rebuilt/overhauled by TCM prior to November 1991) and cross-reference to FAA AD 93-08-17."],"plain_english_summary":"This airworthiness directive requires inspection of certain Teledyne Continental piston engines' oil sumps for incorrectly fitted oil pick‑up tubes and mandates replacing the tube and sump before further flight if an incorrect tube is found. It applies to engines rebuilt or overhauled by Teledyne Continental Motors (Mobile, Alabama) before November 1991; compliance is required within 25 hours time-in-service or before installation, following TCM Service Bulletin M91-10 Rev.1."}},"importantCases":[],"_links":{"self":"/api/acts/ad-con-68-incorrect-oil-pick-up-tube","history":"/api/acts/ad-con-68-incorrect-oil-pick-up-tube/history","analysis":"/api/acts/ad-con-68-incorrect-oil-pick-up-tube/analysis","conflicts":"/api/acts/ad-con-68-incorrect-oil-pick-up-tube/conflicts","importantCases":"/api/acts/ad-con-68-incorrect-oil-pick-up-tube/important-cases","documents":"/api/acts/ad-con-68-incorrect-oil-pick-up-tube/documents"}}