{"id":"F2008L03277","name":"AD/DHC-1/13 - Flap Return Spring/Flap Check Cable - CANCELLED","slug":"ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":120027,"registerId":"commonwealth-F2008L03277-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"De Havilland DHC-1 (Chipmunk) Series Aer","sectionType":"division","heading":"De Havilland DHC-1 (Chipmunk) Series Aeroplanes","content":"### De Havilland DHC-1 (Chipmunk) Series Aeroplanes\n\n| AD/DHC-1/13 | Flap Return Spring/Flap Check Cable | 10/2008 |\n| ----------- | ----------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                                                                                               |\n| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 25 September 2008.                                                                                                                                                                                                                                                                                                                                               |\n| Background:  | This unique Australian AD, raised in 1961 against De Havilland Technical News Sheet (TNS) DCH-1 Aust. No. 3 or Aust. No. 6 required a modification after a number of instances of flaps locking in the down position after failure of the flap return spring. Compliance was required forthwith.As all affected aircraft would have been modified by now, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n15 August 2008","sortOrder":0},{"sectionNumber":"AD/DHC-1/13","sectionType":"part","heading":"AD/DHC-1/13","content":"## AD/DHC-1/13","sortOrder":1},{"sectionNumber":"Flap Return Spring/Flap Check Cable","sectionType":"part","heading":"Flap Return Spring/Flap Check Cable","content":"## Flap Return Spring/Flap Check Cable","sortOrder":2},{"sectionNumber":"10/2008","sectionType":"part","heading":"10/2008","content":"## 10/2008","sortOrder":3}],"analysis":{"summary":{"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":false,"description":"This instrument cancels an existing airworthiness directive and imposes no new requirements."},"complexity_factors":["Cancellation of an obsolete airworthiness directive","No active requirements imposed","Purely administrative notice"],"plain_english_summary":"This airworthiness directive (AD) for De Havilland DHC-1 (Chipmunk) aeroplanes was cancelled on 25 September 2008. The original AD, issued in 1961, required immediate modification to the flap return spring and flap check cable after failures caused flaps to lock in the down position. The cancellation confirms that the directive is no longer in force and operators do not need to comply with its requirements. All affected aircraft are expected to have been modified long ago. If you maintain or operate a Chipmunk, you can disregard this AD; no further action is needed. This notice simply removes an obsolete regulatory requirement."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled","history":"/api/acts/ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled/history","analysis":"/api/acts/ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled/analysis","conflicts":"/api/acts/ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled/conflicts","importantCases":"/api/acts/ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled/important-cases","documents":"/api/acts/ad-dhc-1-13-flap-return-spring-flap-check-cable-cancelled/documents"}}