{"id":"F2009L02813","name":"AD/CESSNA 170/13 Amdt 3 - Plastic Control Wheel","slug":"ad-cessna-170-13-amdt-3-plastic-control-wheel","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":80056,"registerId":"commonwealth-F2009L02813-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Cessna 170, 172, F172, FR172 and 175 Ser","sectionType":"division","heading":"Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes","content":"### Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes\n\n| AD/CESSNA 170/13 Amdt 3 | Plastic Control Wheel | 8/2009 |\n| ----------------------- | --------------------- | ------ |\n\n| Applicability: | All 172 and 175, series fitted with plastic control wheels.                                                                                                                                                                                                                                                                                                                                                                                 |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| Requirement:   | Action in accordance with Cessna Service Letter (SL) No. 64-8.                                                                                                                                                                                                                                                                                                                                                                              |\n| Compliance:    | At intervals not exceeding 500 hours TIS after 1 September 1971.                                                                                                                                                                                                                                                                                                                                                                            |\n|                | This Amendment becomes effective on 30 July 2009.                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | This AD requires an inspection following reports of in service cracking and failures of plastic control wheels. The requirement documents for the inspection were Cessna Service Letter (SL) No. 62-44 and 64-8.As an inspection carried out in accordance with SL 64-8 supersedes the inspection required by SL 62-44, this amendment deletes SL 62-44. No change has been made to the compliance period for requirement document SL 64-8. |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2009","sortOrder":0},{"sectionNumber":"AD/CESSNA 170/13 Amdt 3","sectionType":"part","heading":"AD/CESSNA 170/13 Amdt 3","content":"## AD/CESSNA 170/13 Amdt 3","sortOrder":1},{"sectionNumber":"Plastic Control Wheel","sectionType":"part","heading":"Plastic Control Wheel","content":"## Plastic Control Wheel","sortOrder":2},{"sectionNumber":"8/2009","sectionType":"part","heading":"8/2009","content":"## 8/2009","sortOrder":3}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This amendment maintains the original scope established in 1971. The 2009 update is purely administrative — removing a redundant reference to an older service letter without altering the inspection requirement, compliance period, or affected aircraft population."},"complexity_factors":["Very short document (under 300 words)","Only 1 substantive requirement (inspect per SL 64-8)","Simple applicability test (aircraft model + plastic control wheel)","Single compliance trigger (500 hours TIS)","No defined terms section, no cross-references to other legislation beyond the Cessna Service Letter","Straightforward amendment logic (removing superseded document, no substantive change)"],"plain_english_summary":"This CASA Airworthiness Directive mandates recurring inspections of plastic control wheels on certain Cessna 170/172/F172/FR172/175 series aircraft to detect cracking or damage. It affects owners/operators and maintenance engineers of those aircraft with plastic yokes and requires checks per Cessna Service Letter No. 64‑8 every 500 hours TIS. Amendment 3 simply removes an obsolete reference; the inspection requirement and timing remain unchanged."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The amendment removes the older inspection document SL 62‑44 because SL 64‑8 supersedes it and retains the same inspection interval (no change to the compliance period for SL 64‑8) (Background; Compliance)."},"complexity_factors":["Limited applicability: only affects listed Cessna 170/172/F172/FR172/175 series aeroplanes fitted with plastic control wheels (Applicability).","Single mandated action: inspection required in accordance with an external document (Cessna Service Letter No. 64‑8) rather than multiple distinct technical steps (Requirement).","Fixed compliance interval: inspections at intervals not exceeding 500 hours TIS, with a specific historical start date (Compliance).","Reference to and replacement of prior document (deletes SL 62‑44) increases reliance on the correctness and availability of SL 64‑8 (Background).","Administrative formality: amendment notes effective date and is signed by CASA delegate, implying regulatory enforcement and recordkeeping (signature/date)."],"plain_english_summary":"This airworthiness directive requires owners/operators of Cessna 170, 172, F172, FR172 and 175 series aeroplanes fitted with plastic control wheels to inspect those wheels in accordance with Cessna Service Letter No. 64‑8 at intervals not exceeding 500 hours time‑in‑service. The amendment deletes the earlier Service Letter SL 62‑44 because SL 64‑8 supersedes it; it was issued after reports of in‑service cracking and failures of plastic control wheels."},"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"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-170-13-amdt-3-plastic-control-wheel","history":"/api/acts/ad-cessna-170-13-amdt-3-plastic-control-wheel/history","analysis":"/api/acts/ad-cessna-170-13-amdt-3-plastic-control-wheel/analysis","conflicts":"/api/acts/ad-cessna-170-13-amdt-3-plastic-control-wheel/conflicts","importantCases":"/api/acts/ad-cessna-170-13-amdt-3-plastic-control-wheel/important-cases","documents":"/api/acts/ad-cessna-170-13-amdt-3-plastic-control-wheel/documents"}}