{"id":"F2009L03653","name":"AD/F27/21 - Aileron Control Wheel - Inspection of Washers - CANCELLED","slug":"ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":141487,"registerId":"commonwealth-F2009L03653-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Fokker F27 Series Aeroplanes","sectionType":"division","heading":"Fokker F27 Series Aeroplanes","content":"### Fokker F27 Series Aeroplanes\n\n| AD/F27/21 | Aileron Control Wheel - Inspection of Washers | 11/2009 |\n| --------- | --------------------------------------------- | ------- |\n\n| Requirement: | CANCELLED.                                                                                                                                                                                                                                                                                                    |\n| ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n|              | This AD is cancelled on 22 October 2009.                                                                                                                                                                                                                                                                      |\n| Background:  | This AD, raised in 1960, and again in 1971 against Fokker Service Bulletin (SB)C-18, required an inspection and replacement of washers below the aileron control wheel retaining nut.As all affected aircraft would have been inspected, and, if necessary, 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\n9 September 2009","sortOrder":0},{"sectionNumber":"AD/F27/21","sectionType":"part","heading":"AD/F27/21","content":"## AD/F27/21","sortOrder":1},{"sectionNumber":"Aileron Control Wheel - Inspection of Wa","sectionType":"part","heading":"Aileron Control Wheel - Inspection of Washers","content":"## Aileron Control Wheel - Inspection of Washers","sortOrder":2},{"sectionNumber":"11/2009","sectionType":"part","heading":"11/2009","content":"## 11/2009","sortOrder":3}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2140},"content_quality":"ok","complexity_score":1,"scope_assessment":{"changed":true,"description":"The original instrument imposed mandatory inspection and hardware replacement obligations on aircraft operators. This cancellation instrument revokes those requirements entirely, reducing the regulatory scope from active safety mandates to nil."},"complexity_factors":["Single operative provision stating 'CANCELLED'","No defined terms or interpretation section","No conditional logic, exceptions, or procedural steps","No cross-references to other legislation (only historical reference to a 1971 Service Bulletin)","Extremely short length (approximately 50 words of substantive regulatory content)"],"plain_english_summary":"**What this is:** This is an Airworthiness Directive (AD) — a mandatory safety rule issued by the Civil Aviation Safety Authority (CASA) for aircraft.\n\n**What it does:** It formally cancels an old safety requirement that applied to Fokker F27 aeroplanes. The original rule (first issued in 1960 and updated in 1971) required owners to inspect and replace specific washers located below the aileron control wheel retaining nut.\n\n**Why it matters:** The inspection rule is now obsolete because all affected aircraft would have been inspected and modified decades ago. This document removes the outdated requirement from the safety regulations, effective 22 October 2009.\n\n**Who it affects:** Owners and operators of Fokker F27 aircraft, though in practice all necessary work was completed long before this cancellation."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled","history":"/api/acts/ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled/history","analysis":"/api/acts/ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled/analysis","conflicts":"/api/acts/ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled/conflicts","importantCases":"/api/acts/ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled/important-cases","documents":"/api/acts/ad-f27-21-aileron-control-wheel-inspection-of-washers-cancelled/documents"}}