{"id":"F2006B05273","name":"AD/CESSNA 207/13 Amdt 2 - Turbocharger Thrust Bearing Pin and Centre Housing Assembly","slug":"ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":45639,"registerId":"commonwealth-F2006B05273-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 207/13 Amdt 2 - Turbocharger Thrust Bearing Pin and Centre Housing Assembly","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)  \nCessna 207 Series Aeroplanes\n\nAD/CESSNA 207/13\n\nAmdt 2\n\n  \n\nTurbocharger Thrust Bearing Pin and Centre Housing Assembly\n\n  \n4/78\n\nApplicability: Model TU207 fitted with turbochargers Cessna P/N C295001-0101 or Airesearch P/N 406610-5 (new) or 406610-9004 (remanufactured) having S/No. prefixes listed in Cessna SL No SE77-3, Supplement No 2.\n\nRequirement: Part 1: Turbochargers which have not had Cessna Service Kit No SK210-75 incorporated:\n\nThis kit shall be incorporated by an approved organisation in accordance with Cessna SL No SE77-3, Supplement No 3.\n\nPart 2: Turbochargers which have had Cessna Service Kit No SK210-75 incorporated in the field must be inspected in accordance with Cessna SL No SE77-42.\n\nCompliance: Parts 1 and 2: Within 100 hours time in service after 30 April 1978.","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is Amendment 2 to an existing Airworthiness Directive, but the scope remains tightly focused on the original safety issue: turbocharger thrust bearing defects in specific Cessna 207 aircraft. The amendment structure suggests iterative refinement of the original 1978 directive rather than scope expansion."},"complexity_factors":["Short, single-purpose directive with clear applicability criteria","Only 2 defined part numbers and 1 service kit referenced","Simple binary condition (repair kit installed or not) with corresponding action","Single compliance deadline with straightforward time-in-service calculation","No nested exceptions, cross-references to other legislation, or conditional sub-clauses","Relies on external Cessna technical documents (Service Letters) for detailed procedures rather than embedding them"],"plain_english_summary":"This is an **Airworthiness Directive** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). It requires owners and operators of specific Cessna 207 aircraft to fix a known defect in their turbocharger systems.\n\n**What it does:**\n- Targets Cessna 207 model TU207 aircraft fitted with specific turbocharger part numbers\n- Addresses a safety issue with the turbocharger's thrust bearing pin and centre housing assembly\n- Mandates two different actions depending on whether a previous repair kit has been installed:\n  - **If the repair kit was never installed:** Must install Cessna Service Kit SK210-75 following official Cessna instructions\n  - **If the repair kit was already installed:** Must inspect the turbocharger following a different set of Cessna instructions (Service Letter SE77-42)\n\n**Who it affects:**\n- Owners and operators of Cessna TU207 aircraft with specific turbocharger serial numbers\n- Maintenance organisations approved to perform the work\n\n**Why it matters:**\nTurbocharger failures can cause engine power loss or damage. This directive prevents potential in-flight emergencies by ensuring defective components are either replaced or inspected. Compliance is mandatory — aircraft cannot legally fly until the work is done within the specified timeframe (100 flight hours after 30 April 1978).\n\n**Key deadline:** The work must be completed within 100 hours of flight time after 30 April 1978."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument is labelled as Amendment 2 (Amdt 2), and it specifies applicability by reference to serial-number prefixes in Cessna Service Letter SE77-3, Supplement No 2 and sets distinct mandatory actions: incorporation of Service Kit SK210-75 where not previously fitted (to be installed by an approved organisation per SE77-3, Supplement No 3) or inspection where the kit was fitted in the field (to be done per SE77-42) (Amdt 2; Applicability; Requirement: Part 1; Requirement: Part 2). These references and the two-part requirement indicate a change in the AD’s scope or procedures compared with an earlier version by adding or clarifying which units are in scope and the required corrective or inspection action."},"complexity_factors":["Dependency on external technical documents (Cessna Service Letter SE77-3 and SE77-42 and their Supplements) for identification and procedures (Applicability; Requirement: Part 1; Part 2).","Split requirement path: different mandatory actions depending on whether the service kit SK210-75 is already fitted (Requirement: Part 1; Part 2).","Identification of affected units requires cross-referencing serial number prefixes listed in a separate supplement (Applicability).","Fixed compliance window tied to a historical date and a time-in-service metric (Compliance).","Requirement that work be carried out by an approved organisation adds an administrative compliance step (Requirement: Part 1)."],"plain_english_summary":"This AD targets Cessna TU207 aircraft with certain turbochargers (serial prefixes in Cessna Service Letter SE77‑3, Suppl. 2). It requires fitting Service Kit SK210‑75 where absent, or performing the specified inspection where the kit is already installed, using an approved maintenance organisation and following Cessna service letters. The work must be done within 100 hours TIS after 30 April 1978. Owners/operators bear the cost and scheduling burden; technical details are from the referenced Cessna documents."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly","history":"/api/acts/ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly/history","analysis":"/api/acts/ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly/analysis","conflicts":"/api/acts/ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly/conflicts","importantCases":"/api/acts/ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly/important-cases","documents":"/api/acts/ad-cessna-207-13-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly/documents"}}