{"id":"F2009L02325","name":"AD/PT6A/14 - Sungear Coupling Shaft Retaining Rings - CANCELLED","slug":"ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":79079,"registerId":"commonwealth-F2009L02325-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pratt and Whitney Canada Turbine Engines","sectionType":"division","heading":"Pratt and Whitney Canada Turbine Engines - PT6A Series","content":"### Pratt and Whitney Canada Turbine Engines - PT6A Series\n\n| AD/PT6A/14 | Sungear Coupling Shaft Retaining Rings | 7/2009 |\n| ---------- | -------------------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                 |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 2 July 2009.                                                                                                                                                                       |\n| Background:  | This unique Australian AD specified action in accordance with UACL SB No. 249 or SB No. 1173 before installation in an aircraft following reconditioning after October 1972. The AD is no longer required. |\n\n![](image.001.png)\n\nJames Coyne  \nDelegate of the Civil Aviation Safety Authority\n\n18 May 2009","sortOrder":0},{"sectionNumber":"AD/PT6A/14","sectionType":"part","heading":"AD/PT6A/14","content":"## AD/PT6A/14","sortOrder":1},{"sectionNumber":"Sungear Coupling Shaft Retaining Rings","sectionType":"part","heading":"Sungear Coupling Shaft Retaining Rings","content":"## Sungear Coupling Shaft Retaining Rings","sortOrder":2},{"sectionNumber":"7/2009","sectionType":"part","heading":"7/2009","content":"## 7/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":3368},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"The instrument has not expanded beyond its original purpose; it has been entirely terminated. This represents a complete reduction in regulatory scope to zero, not scope creep."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Extremely short length (under 100 words of substantive content)","No cross-references to other legislation (only historical reference to superseded technical bulletins)"],"plain_english_summary":"This document officially scraps an old aviation safety rule. **What it is:** An Airworthiness Directive (AD) is a mandatory safety instruction issued by the Civil Aviation Safety Authority (CASA). This document cancels AD/PT6A/14, which previously required special inspections of *sungear coupling shaft retaining rings* (engine components) on Pratt & Whitney Canada PT6A turbine engines. **What changed:** Before this cancellation, mechanics had to follow specific manufacturer service bulletins (UACL SB No. 249 or SB No. 1173) when reinstalling certain reconditioned engine parts. **Who it affects:** Aircraft operators and maintenance crews working on PT6A engines. **Why it matters:** As of 2 July 2009, those specific checks are no longer legally required before installing these parts, reducing red tape because CASA determined the safety rule was no longer necessary."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled","history":"/api/acts/ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled/history","analysis":"/api/acts/ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled/analysis","conflicts":"/api/acts/ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled/conflicts","importantCases":"/api/acts/ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled/important-cases","documents":"/api/acts/ad-pt6a-14-sungear-coupling-shaft-retaining-rings-cancelled/documents"}}