{"id":"F2006B09700","name":"AD/F27/133 - Flight Controls - Flap Actuator Noise Filter Capacitors","slug":"ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115862,"registerId":"commonwealth-F2006B09700-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/F27/133 - Flight Controls - Flap Actuator Noise Filter Capacitors","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 22.10.0\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Fokker F27 Series Aeroplanes\n\n \n\n# AD/F27/133 Flight Controls - Flap Actuator Noise Filter Capacitors\n\nApplicability: All Model F27 (except Mk 050).\n\n# 11/92\n\n \n\nRequirement: Action in accordance with Fokker SB F27/27-135 dated 1 June 1992 and Lucas Aerospace Power Equipment Corporation SB D7-9-27-01 dated 15 May 1991.\n\n \n\nNote: RLD AD 92-076 dated 10 July 1992 refers.\n\n \n\nCompliance: Within 500 time in service from 15 October 1992 or before 1 January 1993, whichever occurs first.\n\n \n\nBackground: Fokker advises that one operator recently experienced the detachment of a flap actuator noise filter capacitor, which subsequently caused damage to the lower aileron cable. This Directive requires the capacitors to be inspected and, if necessary, replaced to prevent similar occurrences.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The AD's scope is narrowly defined in the text: it applies to all Fokker F27s except Mk 050 and requires inspection/replacement per two specified service bulletins. The instrument does not broaden or narrow obligations beyond that targeted corrective action, nor does it add new categories of aircraft or tasks beyond those service-bulletin procedures."},"complexity_factors":["Applicability limited to F27 models except Mk 050 (Applicability) — operators must determine whether the AD applies to particular airframes.","External-document dependency: mandates actions 'in accordance with' two manufacturer service bulletins (Requirement) — execution depends on those documents' procedures.","Short, dual-trigger compliance window (within 500 time in service from 15 Oct 1992 or before 1 Jan 1993) (Compliance) — creates scheduling pressure for operators.","Conditional remedy (inspect and 'if necessary' replace) (Requirement/Background) — requires maintenance judgment to determine corrective action.","Safety incident described (detached capacitor damaged lower aileron cable) (Background) — provides the safety rationale but no new technical standards in the AD text itself.","Cross-reference note to another directive (RLD AD 92-076) (Note) — introduces additional regulatory linkage to check."],"plain_english_summary":"This Airworthiness Directive requires operators of Fokker F27 aeroplanes (except Mk 050) to inspect flap actuator noise‑filter capacitors and replace them if needed, following specified Fokker and Lucas service bulletins, within 500 flight hours from 15 October 1992 or by 1 January 1993 (whichever is earlier). It responds to an incident where a detached capacitor damaged a lower aileron cable; compliance and the cost of inspection/replacement fall to aircraft operators and their maintenance providers."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific identified defect. It has not expanded beyond its original purpose of addressing flap actuator capacitor failures."},"complexity_factors":["Single, specific technical requirement referencing external manufacturer service bulletins","Simple applicability clause (all Model F27 except one variant)","Straightforward compliance deadline with binary condition (whichever occurs first)","No defined terms section, no nested exceptions, no cross-references to other legislation beyond the noted service bulletins","Extremely short document (approximately 150 words of substantive content)"],"plain_english_summary":"This AD requires operators of Fokker F27 aircraft (except Mk 050) to inspect or replace flap actuator noise‑filter capacitors per the referenced service bulletins. \n\nPrompt action is mandated because a detached capacitor fell and damaged an aileron cable, creating a serious flight‑control hazard; compliance was required within 500 flight hours after 15 Oct 1992 or before 1 Jan 1993."}},"importantCases":[],"_links":{"self":"/api/acts/ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors","history":"/api/acts/ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors/history","analysis":"/api/acts/ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors/analysis","conflicts":"/api/acts/ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors/conflicts","importantCases":"/api/acts/ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors/important-cases","documents":"/api/acts/ad-f27-133-flight-controls-flap-actuator-noise-filter-capacitors/documents"}}