{"id":"F2009L04070","name":"AD/THIELERT/13 - Engine/Propeller - Constant Speed Unit - Propeller Control Valve - CANCELLED","slug":"ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":81614,"registerId":"commonwealth-F2009L04070-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Thielert Piston Engines","sectionType":"division","heading":"Thielert Piston Engines","content":"### Thielert Piston Engines\n\n| AD/THIELERT/13 | Engine/Propeller - Constant Speed Unit - Propeller Control Valve | 21/2009 |\n| -------------- | ---------------------------------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                       |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 3 November 2009.                                                                                                                                                                                                                         |\n| Background:  | A State of Design airworthiness directive issued on or after 1st October 2009 is defined as an airworthiness directive per CASR Part 39.001A. The requirements of this airworthiness directive have been superseded by EASA AD 2009-0224 issued 20 October 2009. |\n\n![](image.001.png)\n\nWill David  \nDelegate of the Civil Aviation Safety Authority\n\n22 October 2009","sortOrder":0},{"sectionNumber":"AD/THIELERT/13","sectionType":"part","heading":"AD/THIELERT/13","content":"## AD/THIELERT/13","sortOrder":1},{"sectionNumber":"Engine/Propeller - Constant Speed Unit -","sectionType":"part","heading":"Engine/Propeller - Constant Speed Unit - Propeller Control Valve","content":"## Engine/Propeller - Constant Speed Unit - Propeller Control Valve","sortOrder":2},{"sectionNumber":"21/2009","sectionType":"part","heading":"21/2009","content":"## 21/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2435},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":true,"description":"The instrument transforms from imposing substantive maintenance requirements on engine components to a purely administrative cancellation. The scope is narrowed to revocation only, with safety obligations transferred to a foreign (European) regulatory instrument."},"complexity_factors":["Very short instrument with a single operative provision (cancellation)","References to external regulatory instruments (EASA AD 2009-0224, CASR Part 39.001A)","Technical aviation terminology (Constant Speed Unit, Propeller Control Valve) requires domain knowledge","No conditional logic or exceptions"],"plain_english_summary":"This Airworthiness Directive cancels the earlier Australian AD/THIELERT/13 for Thielert piston engines, their Constant Speed Units and Propeller Control Valves. CASA revoked the national requirement because EASA issued AD 2009-0224, which now applies in Australia under CASR 39.001A for directives issued after 1 Oct 2009. Effective 3 Nov 2009, operators and maintenance personnel must follow the EASA AD instead of the cancelled Australian one."}},"importantCases":[],"_links":{"self":"/api/acts/ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled","history":"/api/acts/ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled/history","analysis":"/api/acts/ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled/analysis","conflicts":"/api/acts/ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled/conflicts","importantCases":"/api/acts/ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled/important-cases","documents":"/api/acts/ad-thielert-13-engine-propeller-constant-speed-unit-propeller-control-valve-cancelled/documents"}}