{"id":"F2009L02323","name":"AD/PT6A/12 - Improved Wire Rope Reversing Cable - CANCELLED","slug":"ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":162231,"registerId":"commonwealth-F2009L02323-current","compilationNumber":null,"startDate":"2026-04-04","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Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Pratt and Whitney Canada Turbine Engines","sectionType":"division","heading":"Pratt and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/12 | Improved Wire Rope Reversing Cable | 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. 173 or SB No. 1126 before installation in an aircraft following re-conditioning after December 1971. 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/12","sectionType":"part","heading":"AD/PT6A/12","content":"## AD/PT6A/12","sortOrder":1},{"sectionNumber":"Improved Wire Rope Reversing Cable","sectionType":"part","heading":"Improved Wire Rope Reversing Cable","content":"## Improved Wire Rope Reversing Cable","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":2144},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument performs a straightforward revocation of the previous AD. It has not expanded beyond its sole purpose of cancellation."},"complexity_factors":["Single operative provision (cancellation of previous instrument)","No defined terms or interpretation section","No conditional logic, exceptions, or cross-references to other legislation","Background information provided for context only, not forming operative legal requirements"],"plain_english_summary":"**What this is:** This document officially cancels a previous aviation safety rule (Airworthiness Directive AD/PT6A/12) affecting Pratt & Whitney Canada PT6A turbine engines—commonly used in regional aircraft like the King Air and Twin Otter, as well as agricultural planes.\n\n**What the old rule required:** The original directive required maintenance personnel to follow specific manufacturer service bulletins (UACL SB No. 173 or SB No. 1126) before installing **reconditioned** wire rope reversing cables. These cables are part of the engine's thrust reverser system, which helps slow aircraft down after landing.\n\n**What this cancellation does:** As of **2 July 2009**, airlines and maintenance organisations no longer need to perform these specific checks before installing reconditioned cables in these engines. The Civil Aviation Safety Authority determined this safety requirement was no longer necessary.\n\n**Who is affected:** Aircraft operators, maintenance providers, and parts suppliers dealing with PT6A series engines."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled","history":"/api/acts/ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled/history","analysis":"/api/acts/ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled/analysis","conflicts":"/api/acts/ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled/conflicts","importantCases":"/api/acts/ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled/important-cases","documents":"/api/acts/ad-pt6a-12-improved-wire-rope-reversing-cable-cancelled/documents"}}