{"id":"F2008L04085","name":"AD/PA-25/11 Amdt 2 - Hopper Modification - Dump Requirement - CANCELLED","slug":"ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75968,"registerId":"commonwealth-F2008L04085-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-25 (Pawnee) Series Aeroplanes","sectionType":"division","heading":"Piper PA-25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-25/11 Amdt 2 | Hopper Modification - Dump Requirement | 12/2008 |\n| ------------------ | -------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                        |\n| ------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 20 November 2008.                                                                                                                                                                         |\n| Background:  | This unique Australian AD specified modification of the hopper dump facility to comply with Section 101.17 of Air Navigation Orders. 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-25/11 Amdt 2","sectionType":"part","heading":"AD/PA-25/11 Amdt 2","content":"## AD/PA-25/11 Amdt 2","sortOrder":1},{"sectionNumber":"Hopper Modification - Dump Requirement","sectionType":"part","heading":"Hopper Modification - Dump Requirement","content":"## Hopper Modification - Dump Requirement","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":1288},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument is a termination notice with a strictly limited, singular purpose: to revoke the earlier Airworthiness Directive AD/PA-25/11. It does not expand the regulatory scope, create new obligations, or alter the original scheme beyond ending it. The scope remains precisely what is stated on the face of the document."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional language, exceptions, or cross-references to other statutes","Extremely short length (effective content under 150 words)","Straightforward retrospective application (cancellation effective 20 November 2008)"],"plain_english_summary":"**What this is:** A cancellation of an old aviation safety rule.\n\n**The backstory:** This document formally scraps Airworthiness Directive AD/PA-25/11, which was a uniquely Australian requirement for **Piper PA-25 Pawnee** aircraft (crop-dusting planes used in agriculture). The original rule forced operators to modify the \"hopper dump\" system — the mechanism that releases chemicals or seeds — to meet specific safety standards under the old Air Navigation Orders. Owners had to comply by September 1971.\n\n**Why it matters:** Because that deadline passed nearly 40 years ago and the safety issue is long resolved, the Civil Aviation Safety Authority (CASA) has cancelled the directive. For aircraft operators, this means one less obsolete rule cluttering the books; for everyone else, it’s a routine housekeeping measure to remove redundant regulation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled","history":"/api/acts/ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled/history","analysis":"/api/acts/ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled/analysis","conflicts":"/api/acts/ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled/important-cases","documents":"/api/acts/ad-pa-25-11-amdt-2-hopper-modification-dump-requirement-cancelled/documents"}}