{"id":"F2008L04080","name":"AD/PA-25/9 - Sealing of Rear Fuel Tank Bay - CANCELLED","slug":"ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75958,"registerId":"commonwealth-F2008L04080-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-25 (Pawnee) Series Aeroplanes","sectionType":"division","heading":"Piper PA-25 (Pawnee) Series Aeroplanes","content":"### Piper PA-25 (Pawnee) Series Aeroplanes\n\n| AD/PA-25/9 | Sealing of Rear Fuel Tank Bay | 12/2008 |\n| ---------- | ----------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                    |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 November 2008.                                                                                                                                                                                                     |\n| Background:  | This unique Australian AD specified sealing of openings between the fuselage fuel tank bay and the hopper bay. The AD was not based on a Piper service document. Compliance was required before September 1971. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n2 October 2008","sortOrder":0},{"sectionNumber":"AD/PA-25/9","sectionType":"part","heading":"AD/PA-25/9","content":"## AD/PA-25/9","sortOrder":1},{"sectionNumber":"Sealing of Rear Fuel Tank Bay","sectionType":"part","heading":"Sealing of Rear Fuel Tank Bay","content":"## Sealing of Rear Fuel Tank Bay","sortOrder":2},{"sectionNumber":"12/2008","sectionType":"part","heading":"12/2008","content":"## 12/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1141},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument serves solely to cancel the previous Airworthiness Directive AD/PA-25/9. It does not expand the scope beyond this simple cancellation and contains no substantive regulatory requirements."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic or exceptions","Length of approximately 100 words"],"plain_english_summary":"This document officially cancels a previous aviation safety rule that applied to **Piper PA-25 Pawnee** agricultural aircraft.\n\n**What it does:**\n- Cancels Airworthiness Directive (AD) AD/PA-25/9 effective 20 November 2008\n- Removes the legal requirement for owners to seal the fuel tank bay on these aircraft\n\n**What the old rule required:**\n- Sealing of openings between the rear fuel tank bay and the hopper bay (the compartment where agricultural chemicals are carried)\n- Compliance was originally required by September 1971\n\n**Why it matters:**\nThis is regulatory housekeeping. The Civil Aviation Safety Authority (CASA) has determined this specific safety modification is no longer necessary, reducing compliance burden on owners of these older agricultural aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled","history":"/api/acts/ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled/history","analysis":"/api/acts/ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled/analysis","conflicts":"/api/acts/ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled/conflicts","importantCases":"/api/acts/ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled/important-cases","documents":"/api/acts/ad-pa-25-9-sealing-of-rear-fuel-tank-bay-cancelled/documents"}}