{"id":"F2009L00462","name":"AD/PA-36/7 - Wing Main Spar Centre Section - Modification - CANCELLED","slug":"ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77006,"registerId":"commonwealth-F2009L00462-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-36 (Pawnee Brave) Series Aeropl","sectionType":"division","heading":"Piper PA-36 (Pawnee Brave) Series Aeroplanes","content":"### Piper PA-36 (Pawnee Brave) Series Aeroplanes\n\n| AD/PA-36/7 | Wing Main Spar Centre Section - Modification | 3/2009 |\n| ---------- | -------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                           |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 March 2009.                                                                                                                                                                               |\n| Background:  | This unique Australian AD specified a once-only modification of the wing main spar centre section in accordance with Piper SB No. 472 within 10 hours time in service after June 1975. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n8 January 2009","sortOrder":0},{"sectionNumber":"AD/PA-36/7","sectionType":"part","heading":"AD/PA-36/7","content":"## AD/PA-36/7","sortOrder":1},{"sectionNumber":"Wing Main Spar Centre Section - Modifica","sectionType":"part","heading":"Wing Main Spar Centre Section - Modification","content":"## Wing Main Spar Centre Section - Modification","sortOrder":2},{"sectionNumber":"3/2009","sectionType":"part","heading":"3/2009","content":"## 3/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1583},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The original AD imposed a mandatory modification requirement on aircraft owners. This instrument completely reverses the scope by cancelling that obligation, shifting from mandating action to removing the regulatory requirement."},"complexity_factors":["Document contains fewer than 150 words","Single operative provision (cancellation of previous instrument)","No defined terms, cross-references, or conditional logic","Plain language with no technical legal jargon"],"plain_english_summary":"**What this does:** This document cancels a previous safety rule (Airworthiness Directive AD/PA-36/7) that required owners of Piper PA-36 Pawnee Brave aircraft to modify the centre section of the wing main spar.\n\n**Who it affects:** Owners and operators of Piper PA-36 (Pawnee Brave) series aeroplanes.\n\n**Why it matters:** The original rule required a specific structural modification (in accordance with Piper Service Bulletin No. 472) to be completed within 10 flight hours after June 1975. This cancellation removes that maintenance requirement entirely, meaning owners no longer need to perform this modification to keep their aircraft legally airworthy in Australia. The cancellation took effect on 12 March 2009."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled","history":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled/history","analysis":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-36-7-wing-main-spar-centre-section-modification-cancelled/documents"}}