{"id":"F2008L02484","name":"AD/PA-31/28 - Control Attachment Ball Joints - Inspection - CANCELLED","slug":"ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74429,"registerId":"commonwealth-F2008L02484-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/28 | Control Attachment Ball Joints - 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 control attachment ball joints in accordance with Piper SB No. 407. The AD required compliance within 100 hours TIS after December 1973 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-31/28","sectionType":"part","heading":"AD/PA-31/28","content":"## AD/PA-31/28","sortOrder":1},{"sectionNumber":"Control Attachment Ball Joints - Inspect","sectionType":"part","heading":"Control Attachment Ball Joints - Inspection","content":"## Control Attachment Ball Joints - 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":1768},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs a narrow administrative function: formally terminating an obsolete airworthiness directive. The scope is limited to cancelling a spent requirement and does not expand regulatory obligations, create new duties, or alter the original intent of the directive framework."},"complexity_factors":["Single operative provision (cancellation) with no substantive requirements","No defined terms or interpretation section","No cross-references to other legislation (only mentions manufacturer service bulletin)","No conditional logic, exceptions, or compliance mechanisms","Document consists primarily of background explanation rather than operative text"],"plain_english_summary":"**What this is:** This document officially cancels an old aviation safety rule (Airworthiness Directive AD/PA-31/28) that required owners of Piper PA-31 aircraft to inspect their control attachment ball joints.\n\n**Who it affects:** Owners and operators of Piper PA-31 series aeroplanes (Navajo models), though in practice, no current action is required.\n\n**Why it matters:** The original rule required a one-time inspection of flight control ball joints according to manufacturer guidelines (Piper Service Bulletin 407). The deadline was 100 flight hours after December 1973. By 2008, every affected aircraft had already completed this inspection decades ago, making the rule obsolete.\n\n**Current status:** As of 31 July 2008, this requirement is formally cancelled. Aircraft owners no longer need to track or comply with this directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled","history":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled/history","analysis":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled/important-cases","documents":"/api/acts/ad-pa-31-28-control-attachment-ball-joints-inspection-cancelled/documents"}}