{"id":"F2008L02486","name":"AD/PA-31/25 Amdt 1 - Control Shaft Collar - Modification - CANCELLED","slug":"ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":74433,"registerId":"commonwealth-F2008L02486-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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Piper PA-31 Series Aeroplanes","sectionType":"division","heading":"Piper PA-31 Series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-31/25 Amdt 1 | Control Shaft Collar - 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 control shaft collar in accordance with Piper SB No. 487. The AD required compliance within 100 hours TIS after January 1976 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-31/25 Amdt 1","sectionType":"part","heading":"AD/PA-31/25 Amdt 1","content":"## AD/PA-31/25 Amdt 1","sortOrder":1},{"sectionNumber":"Control Shaft Collar - Modification","sectionType":"part","heading":"Control Shaft Collar - Modification","content":"## Control Shaft Collar - 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":2480},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This amendment represents a fundamental change from the original directive's scope. The original AD created a positive legal obligation (mandatory hardware modification). This version eliminates all substantive requirements, converting the instrument from an active safety mandate into a historical cancellation notice with no ongoing compliance burden."},"complexity_factors":["Single operative provision consisting of one word: 'CANCELLED'","No definitions section or interpretation clauses","No conditional logic, exceptions, or cross-references to other legislation (only historical reference to manufacturer bulletin)","Extremely brief (approximately 100 words of substance)"],"plain_english_summary":"**What this does**\n\nThis document officially cancels (revokes) an old aircraft safety rule called **Airworthiness Directive AD/PA-31/25**. \n\n**Who it affects**\n\nOwners and operators of **Piper PA-31 series aeroplanes** (a type of twin-engine aircraft). However, this cancellation actually means they no longer need to do anything—because the work was already completed decades ago.\n\n**What the old rule required**\n\nThe original directive (issued in 1976) required a one-time modification to the **control shaft collar** (a mechanical part in the flight controls). Owners had to perform this work within 100 hours of flying time after January 1976, following instructions from the manufacturer (Piper Service Bulletin No. 487).\n\n**Why it matters**\n\nSince the deadline was 1976, every affected aircraft would have been modified long ago. This amendment tidies up the law book by removing an obsolete requirement that is no longer enforceable as of **31 July 2008**."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled","history":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled/history","analysis":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled/analysis","conflicts":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled/conflicts","importantCases":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled/important-cases","documents":"/api/acts/ad-pa-31-25-amdt-1-control-shaft-collar-modification-cancelled/documents"}}