{"id":"F2008L02643","name":"AD/PA-31/58 - Auto Pilot Servo Bridle Clamp Bolt Torque - Modification - CANCELLED","slug":"ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74680,"registerId":"commonwealth-F2008L02643-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/58 | Auto Pilot Servo Bridle ClampBolt Torque - 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 the autopilot servo bridle clamp bolt in accordance with Piper SB No. 558. The AD required compliance within 100 hours TIS after September 1977. All affected aircraft have now been modified. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n12 June 2008","sortOrder":0},{"sectionNumber":"AD/PA-31/58","sectionType":"part","heading":"AD/PA-31/58","content":"## AD/PA-31/58","sortOrder":1},{"sectionNumber":"Auto Pilot Servo Bridle ClampBolt Torque","sectionType":"part","heading":"Auto Pilot Servo Bridle ClampBolt Torque - Modification","content":"## Auto Pilot Servo Bridle Clamp  \nBolt Torque - 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":1447},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument remains true to its original purpose. It was always intended as a temporary mandatory modification directive until all affected aircraft were brought into compliance. The cancellation reflects successful completion of that original scope rather than mission creep."},"complexity_factors":["Single operative provision consisting of one word: 'CANCELLED'","No defined terms or interpretation section","No cross-references to other legislation (only historical reference to a service bulletin)","No conditional logic, exceptions, or transitional provisions"],"plain_english_summary":"This instrument cancels a previous Airworthiness Directive that required a one‑time adjustment of the autopilot servo bridle clamp bolt torque on certain Piper PA‑31 series aircraft per Service Bulletin No. 558. CASA says the work has been completed on all affected aircraft and the directive expired 31 July 2008, so owners no longer must comply — retain records showing the modification was done."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled","history":"/api/acts/ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled/history","analysis":"/api/acts/ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-31-58-auto-pilot-servo-bridle-clamp-bolt-torque-modification-cancelled/documents"}}