{"id":"F2008L02488","name":"AD/PA-31/19 - Flap Track and Rudder Tip Rib Assemblies - Inspection - CANCELLED","slug":"ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74437,"registerId":"commonwealth-F2008L02488-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/19 | Flap Track and Rudder TipRib Assemblies - Inspection | 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 inspection of flap track and rudder tip rib assemblies in accordance with Piper SL No. 594. The AD required compliance within 100 hours TIS after December 1971 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\n13 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/19","sectionType":"part","heading":"AD/PA-31/19","content":"## AD/PA-31/19","sortOrder":1},{"sectionNumber":"Flap Track and Rudder TipRib Assemblies ","sectionType":"part","heading":"Flap Track and Rudder TipRib Assemblies - Inspection","content":"## Flap Track and Rudder Tip  \nRib Assemblies - Inspection","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":1473},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument has been cancelled entirely, eliminating all previous obligations. This represents termination rather than expansion of scope."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No cross-references to other legislation","No conditional logic, exceptions, or procedural requirements","Background information provided for context only"],"plain_english_summary":"**What this is:** A cancelled aviation safety rule for owners of Piper PA-31 series aircraft (light twin-engine planes).\n\n**What it used to do:** Required a one-time inspection of the flap track and rudder tip rib assemblies to check for wear or damage, following a manufacturer service bulletin (Piper SL No. 594).\n\n**What it does now:** **Nothing.** The directive was officially cancelled on 31 July 2008 because the deadline for compliance was December 1971—meaning any aircraft that needed the fix would have been modified decades ago.\n\n**Why it matters:** This shows how aviation safety authorities clean up the rulebook by removing outdated requirements that no longer serve a safety purpose, reducing paperwork for aircraft owners."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled","history":"/api/acts/ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled/history","analysis":"/api/acts/ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled/important-cases","documents":"/api/acts/ad-pa-31-19-flap-track-and-rudder-tip-rib-assemblies-inspection-cancelled/documents"}}