{"id":"F2008L02467","name":"AD/PA-31/91 Amdt 1 - Outboard Flap Track Attachment - CANCELLED","slug":"ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74413,"registerId":"commonwealth-F2008L02467-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series Aeroplanes","content":"### Piper PA-31 Series Aeroplanes\n\n| AD/PA-31/91 Amdt 1 | Outboard Flap Track Attachment | 8/2008 |\n| ------------------ | ------------------------------ | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                          |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 31 July 2008.                                                                                                                                                                                                               |\n| Background:  | This unique Australian AD required once-only modification of the outboard flap track attachment in accordance with Piper SB No. 647A. The AD required modification before 30 June 1981, so all affected aircraft would have been modified long ago. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n17 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/91 Amdt 1","sectionType":"part","heading":"AD/PA-31/91 Amdt 1","content":"## AD/PA-31/91 Amdt 1","sortOrder":1},{"sectionNumber":"Outboard Flap Track Attachment","sectionType":"part","heading":"Outboard Flap Track Attachment","content":"## Outboard Flap Track Attachment","sortOrder":2},{"sectionNumber":"8/2008","sectionType":"part","heading":"8/2008","content":"## 8/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2184},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This amendment completely cancels the original Airworthiness Directive, eliminating the mandatory modification requirement for Piper PA-31 outboard flap track attachments. The legislation's scope has shifted from imposing an active safety obligation on aircraft owners to having nil regulatory effect."},"complexity_factors":["Single operative sentence cancelling the directive","No defined terms or interpretation section","No cross-references to other legislative instruments","Background provided as historical narrative only, without legal conditions or exceptions"],"plain_english_summary":"This document **cancels an old aircraft safety rule** that used to require owners of Piper PA-31 series aeroplanes (such as the Navajo) to modify a specific wing component called the \"outboard flap track attachment\" (the hardware that guides the wing flaps during flight).\n\nOriginally, this modification was mandatory to prevent potential safety failures, with a compliance deadline set in 1981. Because that deadline passed decades ago, the safety authority assumes all affected aircraft were fixed long ago. This instrument formally removes the rule from the books so owners no longer need to track or comply with this specific requirement.\n\n**Who it affects:** Owners and operators of Piper PA-31 series aircraft.\n**Why it matters:** It clears obsolete regulations from the law, recognizing that the safety issue was resolved years ago."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled","history":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled/history","analysis":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled/important-cases","documents":"/api/acts/ad-pa-31-91-amdt-1-outboard-flap-track-attachment-cancelled/documents"}}