{"id":"F2008L01845","name":"AD/PA-23/1 - Flap Spar and Stabiliser Spar - Reinforcement - CANCELLED","slug":"ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74039,"registerId":"commonwealth-F2008L01845-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23 (Apache and Aztec) Series Aeroplanes","content":"### Piper PA-23 (Apache and Aztec) Series Aeroplanes\n\n| AD/PA-23/1 | Flap Spar and Stabiliser Spar - Reinforcement | 7/2008 |\n| ---------- | --------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                           |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                 |\n| Background:  | This Directive, based on Piper Service Letter No. 235, called for once-only modification of 52 aircraft in the mid 1950s. As all affected aircraft would have been modified long ago, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/1","sectionType":"part","heading":"AD/PA-23/1","content":"## AD/PA-23/1","sortOrder":1},{"sectionNumber":"Flap Spar and Stabiliser Spar - Reinforc","sectionType":"part","heading":"Flap Spar and Stabiliser Spar - Reinforcement","content":"## Flap Spar and Stabiliser Spar - Reinforcement","sortOrder":2},{"sectionNumber":"7/2008","sectionType":"part","heading":"7/2008","content":"## 7/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1813},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This instrument eliminates the entire regulatory requirement by cancelling the previous Airworthiness Directive. The original scope mandated specific structural modifications for 52 identified aircraft; this cancellation removes that obligation entirely on the basis that compliance has been achieved long ago."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to other legislation","Extremely short (under 200 words)","No conditional logic, exceptions, or procedural steps"],"plain_english_summary":"This instrument formally cancels a decades‑old Airworthiness Directive that required a one‑time structural reinforcement of the flap and stabiliser spars on 52 specific Piper PA‑23 (Apache/Aztec) aircraft. \n\nRegulators consider the once‑only modification complete on affected aircraft, so the directive is now redundant; it affects owners/operators of those specific planes rather than the broader PA‑23 fleet."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled","history":"/api/acts/ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled/history","analysis":"/api/acts/ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled/important-cases","documents":"/api/acts/ad-pa-23-1-flap-spar-and-stabiliser-spar-reinforcement-cancelled/documents"}}