{"id":"F2008L01869","name":"AD/PA-28/31 - Seat Frame - Modification - CANCELLED","slug":"ad-pa-28-31-seat-frame-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74083,"registerId":"commonwealth-F2008L01869-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-28 Series Aeroplanes","sectionType":"division","heading":"Piper PA-28 Series Aeroplanes","content":"### Piper PA-28 Series Aeroplanes\n\n| AD/PA-28/31 | Seat Frame - Modification | 7/2008 |\n| ----------- | ------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                     |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n|              | This AD is cancelled on 3 July 2008.                                                                                                                                                                                                                                           |\n| Background:  | This Directive, issued in 1971, specified Piper SB No. 337 which called for once-only modification of vertically adjustable pilot and co-pilot seats. As all affected aircraft would have been inspected, and, if necessary, modified long ago, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n7 May 2008","sortOrder":0},{"sectionNumber":"AD/PA-28/31","sectionType":"part","heading":"AD/PA-28/31","content":"## AD/PA-28/31","sortOrder":1},{"sectionNumber":"Seat Frame - Modification","sectionType":"part","heading":"Seat Frame - Modification","content":"## Seat Frame - 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":2083},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument is limited to the administrative cancellation of an obsolete airworthiness directive. It does not expand regulatory scope or impose new requirements beyond the simple act of revoking the 1971 modification mandate."},"complexity_factors":["Single operative provision (one sentence of substance)","No defined terms or interpretation section","No cross-references to other legislation or conditional logic","Straightforward administrative cancellation with no exceptions"],"plain_english_summary":"This document **cancels an obsolete aviation safety rule** that is no longer needed.\n\nIn 1971, the Civil Aviation Safety Authority required owners of **Piper PA-28 aircraft** to modify the pilot and co-pilot seat frames to fix a safety defect. Nearly 40 years later, CASA has cancelled this directive because every affected aircraft would have completed the modification decades ago.\n\n**What this means:**\n- The seat frame modification requirement no longer applies to these aircraft\n- Owners no longer need to maintain specific compliance records for this rule\n- The cancellation takes effect on 3 July 2008\n\nThis is essentially housekeeping to remove redundant rules from the aviation safety regulations."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-28-31-seat-frame-modification-cancelled","history":"/api/acts/ad-pa-28-31-seat-frame-modification-cancelled/history","analysis":"/api/acts/ad-pa-28-31-seat-frame-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-28-31-seat-frame-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-28-31-seat-frame-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-28-31-seat-frame-modification-cancelled/documents"}}