{"id":"F2008L02489","name":"AD/PA-31/11 - Aft Facing Seats - Modification - CANCELLED","slug":"ad-pa-31-11-aft-facing-seats-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74438,"registerId":"commonwealth-F2008L02489-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/11 | Aft Facing Seats - Modification | 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 PA-31 aircraft with aft-facing seats in accordance with Piper SB No. 308. The AD required compliance in 1970 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-31/11","sectionType":"part","heading":"AD/PA-31/11","content":"## AD/PA-31/11","sortOrder":1},{"sectionNumber":"Aft Facing Seats - Modification","sectionType":"part","heading":"Aft Facing Seats - Modification","content":"## Aft Facing Seats - Modification","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":1722},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument represents a straightforward cancellation of a spent directive. The scope has not expanded beyond the original purpose; rather, the original requirements have been fulfilled (all affected aircraft were modified by 1970) and the instrument is being formally removed from the regulatory framework without adding new obligations or extending coverage."},"complexity_factors":["Single operative provision (cancellation only)","No defined terms or interpretation section","No conditional logic or exceptions","No cross-references to other legislation","Straightforward revocation of previous instrument"],"plain_english_summary":"This document officially **cancels an old aviation safety rule** that required owners of Piper PA-31 aircraft to modify any rear-facing seats.\n\n**What it does:**\n- Withdraws Airworthiness Directive (AD) AD/PA-31/11 completely\n- Removes the legal requirement for these specific seat modifications\n\n**Why it matters:**\n- The original rule required the modifications to be completed by 1970\n- Since that was nearly 40 years ago, every affected aircraft has already been modified\n- The rule is being cleaned up from the books because it's no longer needed\n\n**Who is affected:**\n- Owners and operators of Piper PA-31 series aircraft (though they already complied decades ago)\n- Takes effect on 31 July 2008"}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-11-aft-facing-seats-modification-cancelled","history":"/api/acts/ad-pa-31-11-aft-facing-seats-modification-cancelled/history","analysis":"/api/acts/ad-pa-31-11-aft-facing-seats-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-11-aft-facing-seats-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-11-aft-facing-seats-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-31-11-aft-facing-seats-modification-cancelled/documents"}}