{"id":"F2008L03621","name":"AD/DH 89/2 - Aileron Differential Pulley - Inspection - CANCELLED","slug":"ad-dh-89-2-aileron-differential-pulley-inspection-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":75267,"registerId":"commonwealth-F2008L03621-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"DH 89 (Dragon Rapide) Series Aeroplanes","sectionType":"division","heading":"DH 89 (Dragon Rapide) Series Aeroplanes","content":"### DH 89 (Dragon Rapide) Series Aeroplanes\n\n| AD/DH 89/2 | Aileron Differential Pulley - Inspection | 11/2008 |\n| ---------- | ---------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                          |\n| ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 23 October 2008.                                                                                                                                                                                                            |\n| Background:  | This AD was raised prior to 1968 requiring an inspection to ensure aileron differential pulleys were correctly located. Compliance was required forthwith.As all affected aircraft would have been inspected by now, this AD is no longer required. |\n\n![](image.001.png)\n\nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n11 September 2008","sortOrder":0},{"sectionNumber":"AD/DH 89/2","sectionType":"part","heading":"AD/DH 89/2","content":"## AD/DH 89/2","sortOrder":1},{"sectionNumber":"Aileron Differential Pulley - Inspection","sectionType":"part","heading":"Aileron Differential Pulley - Inspection","content":"## Aileron Differential Pulley - Inspection","sortOrder":2},{"sectionNumber":"11/2008","sectionType":"part","heading":"11/2008","content":"## 11/2008","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":1991},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"This instrument eliminates the scope entirely by cancelling the previous mandatory inspection requirement. The legislation has shifted from imposing an active safety obligation on aircraft owners to having no legal effect."},"complexity_factors":["Single operative provision (cancellation only)","No definitions or interpretation section","No conditional logic, exceptions, or cross-references","Extremely brief (one sentence of substantive content)"],"plain_english_summary":"This document **cancels** an old aviation safety rule (Airworthiness Directive AD/DH 89/2) that applied to DH 89 Dragon Rapide aeroplanes.\n\n**What the original rule required:**\nThe directive (first issued before 1968) mandated that owners inspect the **aileron differential pulleys** — mechanical components that help control the aircraft's rolling motion — to verify they were correctly positioned. Compliance was required immediately when the rule was first introduced.\n\n**Why it is cancelled:**\nBecause the inspection was required forthwith decades ago, the Civil Aviation Safety Authority (CASA) assumes all affected aircraft have already completed it. The authority no longer sees value in maintaining this specific directive.\n\n**Practical effect:**\nOwners and operators of DH 89 Dragon Rapide aircraft are no longer legally required to perform this specific inspection under this directive."}},"importantCases":[],"_links":{"self":"/api/acts/ad-dh-89-2-aileron-differential-pulley-inspection-cancelled","history":"/api/acts/ad-dh-89-2-aileron-differential-pulley-inspection-cancelled/history","analysis":"/api/acts/ad-dh-89-2-aileron-differential-pulley-inspection-cancelled/analysis","conflicts":"/api/acts/ad-dh-89-2-aileron-differential-pulley-inspection-cancelled/conflicts","importantCases":"/api/acts/ad-dh-89-2-aileron-differential-pulley-inspection-cancelled/important-cases","documents":"/api/acts/ad-dh-89-2-aileron-differential-pulley-inspection-cancelled/documents"}}