{"id":"F2007L04761","name":"AD/PA-31/18 - Front Seat Restraint Installations - Modification - CANCELLED","slug":"ad-pa-31-18-front-seat-restraint-installations-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":71290,"registerId":"commonwealth-F2007L04761-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/18 | Front Seat Restraint Installations - Modification | 1/2008 |\n| ----------- | ------------------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                   |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 17 January 2008.                                                                                                                                     |\n| Background:  | This AD was issued in 1971 to require the installation of upper torso restraint on aircraft certified prior to 1967. This AD has been replaced by AD/GENERAL/74 Amendment 1. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n26 November 2007","sortOrder":0},{"sectionNumber":"AD/PA-31/18","sectionType":"part","heading":"AD/PA-31/18","content":"## AD/PA-31/18","sortOrder":1},{"sectionNumber":"Front Seat Restraint Installations - Mod","sectionType":"part","heading":"Front Seat Restraint Installations - Modification","content":"## Front Seat Restraint Installations - Modification","sortOrder":2},{"sectionNumber":"1/2008","sectionType":"part","heading":"1/2008","content":"## 1/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2565},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument terminates the original AD's regulatory effect rather than expanding its scope. It represents a consolidation of requirements into a general directive (AD/GENERAL/74), not a mission creep beyond the original aviation safety purpose."},"complexity_factors":["Single operative provision (cancellation)","No defined terms requiring interpretation","No conditional logic, exceptions, or procedural steps","Extremely short substantive content (under 50 words)","Only one cross-reference (to the replacement directive)"],"plain_english_summary":"**What this is**\n\nThis document officially cancels an old aviation safety rule (called an **Airworthiness Directive** or AD) that applied to specific Piper aircraft.\n\n**What the old rule required**\n\nOriginally issued in 1971, the rule required owners to install **upper torso restraints** (shoulder harnesses) on the front seats of Piper PA-31 series aeroplanes certified before 1967. This was to better protect pilots and passengers during accidents.\n\n**What this document does**\n\nIt **cancels** the old rule effective 17 January 2008. You no longer need to follow this specific directive (AD/PA-31/18).\n\n**Why it matters**\n\nThe requirement for shoulder harnesses still exists, but it is now covered by a broader, updated rule (**AD/GENERAL/74 Amendment 1**) that applies to many aircraft types. This cancellation removes the outdated specific rule to avoid duplication.\n\n**Who is affected**\n\nOwners and operators of Piper PA-31 series aircraft, who must now ensure compliance with the replacement general directive instead."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-18-front-seat-restraint-installations-modification-cancelled","history":"/api/acts/ad-pa-31-18-front-seat-restraint-installations-modification-cancelled/history","analysis":"/api/acts/ad-pa-31-18-front-seat-restraint-installations-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-18-front-seat-restraint-installations-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-18-front-seat-restraint-installations-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-31-18-front-seat-restraint-installations-modification-cancelled/documents"}}