{"id":"F2008L02474","name":"AD/PA-31/82 - Rudder and Aileron Trim Tab Attachment - Inspection - CANCELLED","slug":"ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74418,"registerId":"commonwealth-F2008L02474-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series Aeroplanes","content":"### Piper PA-31 Series Aeroplanes\n\n| AD/PA-31/82 | Rudder and Aileron Trim TabAttachment - Inspection | 8/2008 |\n| ----------- | -------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                     |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                                          |\n| Background:  | This unique Australian AD required once-only inspection of the rudder and aileron trim tabs in accordance with Piper SB No. 659. The AD required compliance within 25 hours TIS after August 1979, so all affected aircraft would have been modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/82","sectionType":"part","heading":"AD/PA-31/82","content":"## AD/PA-31/82","sortOrder":1},{"sectionNumber":"Rudder and Aileron Trim TabAttachment - ","sectionType":"part","heading":"Rudder and Aileron Trim TabAttachment - Inspection","content":"## Rudder and Aileron Trim Tab  \nAttachment - Inspection","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1922},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument formally cancels the previous Airworthiness Directive. While the legal effect changes from 'inspection required' to 'no requirement', this does not represent scope creep or expansion beyond the original purpose. The cancellation was the intended final action for this aging safety directive once compliance was universal."},"complexity_factors":["Single operative provision - cancellation only","No defined terms or interpretation section","No conditional logic, cross-references, or exceptions","Document consists primarily of historical background explanation"],"plain_english_summary":"**What this is:** A cancellation of an old aircraft safety inspection rule for specific light aircraft.\n\n**Who it affects:** Owners and operators of **Piper PA-31 series aeroplanes** (twin-engine planes like the Navajo).\n\n**What it does:** Removes a requirement to inspect the **rudder and aileron trim tabs** — small adjustable surfaces on the tail and wings that help keep the aircraft flying straight and level. The original rule (issued in 1979) required a one-time inspection of these tabs to check for attachment problems, following the manufacturer's Service Bulletin No. 659, within 25 flight hours after August 1979.\n\n**Why it matters:** The Civil Aviation Safety Authority cancelled this directive on **31 July 2008** because every affected aircraft would have completed the inspection decades earlier. If you operate a Piper PA-31, you no longer need to track or comply with this specific maintenance requirement; the safety issue was resolved long ago."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled","history":"/api/acts/ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled/history","analysis":"/api/acts/ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled/important-cases","documents":"/api/acts/ad-pa-31-82-rudder-and-aileron-trim-tab-attachment-inspection-cancelled/documents"}}