{"id":"F2008L01859","name":"AD/PA-23/27 - Wing Flaps - Inspection and Modification - CANCELLED","slug":"ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74063,"registerId":"commonwealth-F2008L01859-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-23 (Apache and Aztec) Series Ae","sectionType":"division","heading":"Piper PA-23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-23/27 | Wing Flaps - Inspection and Modification | 7/2008 |\n| ----------- | ---------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                  |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                                                                        |\n| Background:  | This Directive was based on Piper Service Letter No. 363 calling for inspection of wing flaps at 100 hourly intervals until the flaps are modified or replaced. This Directive was issued in 1962 so all affected aircraft would have been inspected, and, if necessary, modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-23/27","sectionType":"part","heading":"AD/PA-23/27","content":"## AD/PA-23/27","sortOrder":1},{"sectionNumber":"Wing Flaps - Inspection and Modification","sectionType":"part","heading":"Wing Flaps - Inspection and Modification","content":"## Wing Flaps - Inspection and Modification","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":1384},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This instrument eliminates the original airworthiness requirements entirely, removing the mandatory inspection and modification obligations for wing flaps on these aircraft. The scope shifts from active regulation to deregulation for this specific maintenance item."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic or exceptions","Minimal background explanation with no cross-references to other legislation"],"plain_english_summary":"This document cancels an old aviation safety rule for **Piper PA-23 Apache and Aztec aircraft**.\n\n**What it did originally:** The 1962 directive required owners to inspect the wing flaps every 100 flight hours until they were modified or replaced.\n\n**What this does now:** Effective 3 July 2008, this cancellation removes that inspection requirement entirely.\n\n**Why it matters:** The Civil Aviation Safety Authority (CASA) determined that all affected aircraft would have completed the necessary inspections and modifications decades ago, making the rule obsolete. Owners and operators of these vintage aircraft no longer need to track or comply with this specific flap inspection schedule."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled","history":"/api/acts/ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled/history","analysis":"/api/acts/ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-23-27-wing-flaps-inspection-and-modification-cancelled/documents"}}