{"id":"F2009L00129","name":"AD/PA-23/41 - Auxiliary Front Spar - Inspection - CANCELLED","slug":"ad-pa-23-41-auxiliary-front-spar-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":76559,"registerId":"commonwealth-F2009L00129-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23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-23/41 | Auxiliary Front Spar - Inspection | 2/2009 |\n| ----------- | --------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                  |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 12 February 2009.                                                                                                                                                                                                                                   |\n| Background:  | This unique Australian AD specified a once-only inspection for cracking of the web of the auxiliary front spar (P/No. 16010) within 50 hours time in service after January 1971. This AD was not based on a Piper service document or USA AD. The AD is no longer required. |\n\n![](image.001.png)\n\nDavid Punshon  \nDelegate of the Civil Aviation Safety Authority\n\n11 December 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/41","sectionType":"part","heading":"AD/PA-23/41","content":"## AD/PA-23/41","sortOrder":1},{"sectionNumber":"Auxiliary Front Spar - Inspection","sectionType":"part","heading":"Auxiliary Front Spar - Inspection","content":"## Auxiliary Front Spar - Inspection","sortOrder":2},{"sectionNumber":"2/2009","sectionType":"part","heading":"2/2009","content":"## 2/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2986},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The original AD imposed a mandatory inspection obligation. This version completely removes that requirement, transforming the instrument from an active safety mandate into a cancellation notice with no ongoing compliance obligations."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to other legislation","Background text describes historical requirements only, with no conditional logic"],"plain_english_summary":"**What this is:** This document officially cancels a previous aviation safety rule (called an Airworthiness Directive) for specific Piper aircraft models.\n\n**Who is affected:** Owners and operators of **Piper PA-23 Apache and Aztec** series aeroplanes.\n\n**What the old rule required:** The original directive required a one-time inspection for cracks in the *auxiliary front spar* (a structural component in the wing, part number 16010) within 50 hours of flying time after January 1971.\n\n**What happens now:** As of 12 February 2009, this inspection is **no longer required**. The Civil Aviation Safety Authority (CASA) has determined the safety risk is no longer present, so the mandatory inspection is cancelled.\n\n**Why it matters:** Aircraft owners and maintenance providers no longer need to perform, document, or comply with this specific structural inspection, removing a regulatory burden for operators of these older aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-41-auxiliary-front-spar-inspection-cancelled","history":"/api/acts/ad-pa-23-41-auxiliary-front-spar-inspection-cancelled/history","analysis":"/api/acts/ad-pa-23-41-auxiliary-front-spar-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-41-auxiliary-front-spar-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-41-auxiliary-front-spar-inspection-cancelled/important-cases","documents":"/api/acts/ad-pa-23-41-auxiliary-front-spar-inspection-cancelled/documents"}}