{"id":"F2006B08079","name":"AD/CESSNA 210/29 Amdt 2 - Turbocharger Thrust Bearing Pin and Centre Housing Assembly - Replacement","slug":"ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115177,"registerId":"commonwealth-F2006B08079-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 210/29 Amdt 2 - Turbocharger Thrust Bearing Pin and Centre Housing Assembly - Replacement","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 210 Series Aeroplanes\n\nAD/CESSNA 210/29\n\nAmdt 2\n\n  \n\nTurbocharger Thrust Bearing Pin and Centre Housing Assembly \\- Replacement\n\n  \n4/78\n\nApplicability: Model TU210 fitted with turbochargers Cessna P/N C295001- 0101 or Airesearch P/N 4-06610-5 (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. The scope remains tightly focused on the original safety issue: defective turbocharger thrust bearing pins and centre housing assemblies on specific Cessna 210 models. The amendment structure suggests refinement of instructions rather than expansion into unrelated areas."},"complexity_factors":["Short, single-purpose directive with only 2 conditional requirements (Part 1 and Part 2)","4 specific part numbers and serial number prefixes referenced, requiring cross-checking against aircraft records","References to 3 external Cessna documents (Service Letters SE77-3 Supplements 2 and 3, and SE77-42) that are not reproduced in the text","Simple binary condition: whether Service Kit SK210-75 has been incorporated or not","Single compliance deadline (100 hours time in service after 30 April 1978)","No nested exceptions or complex conditional logic"],"plain_english_summary":"**What this is:** This is an **Airworthiness Directive (AD)** — a mandatory safety order issued by Australia's Civil Aviation Safety Authority (CASA). ADs are legally binding instructions that aircraft owners and operators must follow to fix unsafe conditions in aircraft.\n\n**What it does:** This directive orders the replacement or inspection of **turbocharger parts** on specific Cessna 210 model aeroplanes. The turbocharger is a component that boosts engine power by forcing extra air into the engine.\n\n**Who it affects:** Owners and operators of **Cessna TU210 model aircraft** fitted with specific turbocharger part numbers (Cessna P/N C295001-0101, or Airesearch P/N 4-06610-5 or 406610-9004) with certain serial number prefixes listed in Cessna Service Letter SE77-3, Supplement No. 2.\n\n**The requirements:**\n- **Part 1:** If your turbocharger has **not** had a specific repair kit installed (Cessna Service Kit SK210-75), you must have this kit installed by an approved maintenance organisation, following Cessna's instructions in Service Letter SE77-3, Supplement No. 3.\n- **Part 2:** If your turbocharger **has** had that repair kit installed already (but not at the factory), you must inspect it according to Cessna Service Letter SE77-42.\n\n**When you must comply:** Both actions must be completed within **100 hours of flight time** after 30 April 1978.\n\n**Why it matters:** This directive addresses a safety defect in the turbocharger's thrust bearing pin and centre housing assembly. Failure of these parts could cause engine failure or other serious safety hazards in flight. Compliance is mandatory — ignoring an AD can ground an aircraft and result in penalties."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"The instrument is identified as Amendment 2 (Amdt 2) and specifies applicability, required actions (kit incorporation or inspection), and a compliance deadline. As an amendment, it alters the content of the prior airworthiness directive framework by setting the current replacement/inspection requirements and references to specific Cessna service letters (Applicability; Requirement; Compliance)."},"complexity_factors":["Narrow technical scope limited to specific aircraft model (TU210) and turbocharger part numbers and serial-number prefixes (Applicability).","Two alternative compliance paths (incorporation of Service Kit SK210-75 or inspection if kit already fitted) with different actions for each path (Requirement: Part 1 and Part 2).","Mandated use of specific Cessna service letters and supplements for the technical method (SE77-3 Supplement No. 3; SE77-42) creates dependency on external technical documents (Requirement).","Fixed compliance window expressed in flight hours relative to a historical date (100 hours after 30 April 1978), requiring tracking of time-in-service (Compliance).","Obligation that work be performed by an \"approved organisation\" adds regulatory compliance and administrative coordination burden (Requirement)."],"plain_english_summary":"This airworthiness directive requires owners/operators of certain Cessna TU210 aircraft with specified turbochargers to either have Service Kit SK210‑75 incorporated or, if the kit was already fitted, have the turbocharger inspected per the cited Cessna service letters. Work must be done by an approved organisation within 100 hours time‑in‑service after 30 April 1978; owners/operators arrange and pay for the work."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement","history":"/api/acts/ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement/history","analysis":"/api/acts/ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement/analysis","conflicts":"/api/acts/ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement/conflicts","importantCases":"/api/acts/ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement/important-cases","documents":"/api/acts/ad-cessna-210-29-amdt-2-turbocharger-thrust-bearing-pin-and-centre-housing-assembly-replacement/documents"}}