{"id":"F2008L04127","name":"AD/PA-25/39 Amdt 1 - Fuel Tank - CANCELLED","slug":"ad-pa-25-39-amdt-1-fuel-tank-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76050,"registerId":"commonwealth-F2008L04127-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-25 (Pawnee) Series Aeroplanes","sectionType":"division","heading":"Piper PA-25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-25/39 Amdt 1 | Fuel Tank | 12/2008 |\n| ------------------ | --------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                              |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 November 2008.                                                                                                                                                                                                                                                                                               |\n| Background:  | This unique Australian AD specified installation of a rubber fuel cell liner in any aircraft equipped with a fibreglass fuselage fuel tank. The modification was to be performed in accordance with Piper SB No. 878 or an equivalent modification document. Compliance was required before October 1988. The AD is no longer required. |\n\n![](image.001.png)\n\nCharles Lenarcic  \nDelegate of the Civil Aviation Safety Authority\n\n10 October 2008","sortOrder":0},{"sectionNumber":"AD/PA-25/39 Amdt 1","sectionType":"part","heading":"AD/PA-25/39 Amdt 1","content":"## AD/PA-25/39 Amdt 1","sortOrder":1},{"sectionNumber":"Fuel Tank","sectionType":"part","heading":"Fuel Tank","content":"## Fuel Tank","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":1368},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the regulatory requirements of the previous AD rather than expanding them. The scope of affected aircraft remains limited to the Piper PA-25 Pawnee series as originally specified, but the legal obligation is removed entirely."},"complexity_factors":["Single operative provision (cancellation)","No defined terms","No conditional logic, cross-references, or exceptions","Brief background reference to previous requirement provided for context only"],"plain_english_summary":"**What this does:** This document officially cancels a previous aviation safety rule (Airworthiness Directive) that applied to specific agricultural aircraft.\n\n**Who it affects:** Owners and operators of Piper PA-25 Pawnee series aeroplanes that were originally equipped with fibreglass fuel tanks.\n\n**What changed:** The cancelled rule previously required these aircraft to have rubber fuel cell liners installed (following Piper Service Bulletin No. 878) by October 1988 to prevent fuel leaks. That requirement is now abolished because it is no longer necessary—likely because the affected aircraft have either been modified, retired, or the safety risk has otherwise been resolved.\n\n**Why it matters:** If you own one of these planes, you no longer need to comply with this specific fuel tank modification requirement, though other airworthiness rules still apply."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-39-amdt-1-fuel-tank-cancelled","history":"/api/acts/ad-pa-25-39-amdt-1-fuel-tank-cancelled/history","analysis":"/api/acts/ad-pa-25-39-amdt-1-fuel-tank-cancelled/analysis","conflicts":"/api/acts/ad-pa-25-39-amdt-1-fuel-tank-cancelled/conflicts","importantCases":"/api/acts/ad-pa-25-39-amdt-1-fuel-tank-cancelled/important-cases","documents":"/api/acts/ad-pa-25-39-amdt-1-fuel-tank-cancelled/documents"}}