{"id":"F2009L01359","name":"AD/M20/12 - Rudder Seals - Installation - CANCELLED","slug":"ad-m20-12-rudder-seals-installation-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":77773,"registerId":"commonwealth-F2009L01359-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Mooney M20 Series Aeroplanes","sectionType":"division","heading":"Mooney M20 Series Aeroplanes","content":"### Mooney M20 Series Aeroplanes\n\n| AD/M20/12 | Rudder Seals - Installation | 5/2009 |\n| --------- | --------------------------- | ------ |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                     |\n| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 7 May 2009.                                                                                                                                                                                                                                                                            |\n| Background:  | This unique Australian AD, raised in1967 against Mooney Service Bulletin (SB)No. M20-148, required a modification to the lower rudder assembly. Compliance was required within 100 hours TIS after 7 September 1967.As all affected aircraft would have been modified long ago, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n16 March 2009","sortOrder":0},{"sectionNumber":"AD/M20/12","sectionType":"part","heading":"AD/M20/12","content":"## AD/M20/12","sortOrder":1},{"sectionNumber":"Rudder Seals - Installation","sectionType":"part","heading":"Rudder Seals - Installation","content":"## Rudder Seals - Installation","sortOrder":2},{"sectionNumber":"5/2009","sectionType":"part","heading":"5/2009","content":"## 5/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1733},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument does not expand or alter the scope of the original legislation; it simply terminates the 1967 Airworthiness Directive entirely on the basis that compliance has been achieved by all affected aircraft."},"complexity_factors":["Single operative provision (cancellation)","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","Minimal cross-referencing (only cites the original 1967 directive)","Extremely short document consisting of a one-line requirement and brief historical context"],"plain_english_summary":"This notice formally cancels an obsolete Airworthiness Directive that, in 1967, required installation of seals on the lower rudder assembly of Mooney M20 series aircraft. The safety modification was completed long ago, so the AD is no longer necessary. It affects Mooney M20 owners/operators in name only—no further action is required."}},"importantCases":[],"_links":{"self":"/api/acts/ad-m20-12-rudder-seals-installation-cancelled","history":"/api/acts/ad-m20-12-rudder-seals-installation-cancelled/history","analysis":"/api/acts/ad-m20-12-rudder-seals-installation-cancelled/analysis","conflicts":"/api/acts/ad-m20-12-rudder-seals-installation-cancelled/conflicts","importantCases":"/api/acts/ad-m20-12-rudder-seals-installation-cancelled/important-cases","documents":"/api/acts/ad-m20-12-rudder-seals-installation-cancelled/documents"}}