{"id":"F2006B06382","name":"AD/PW100/3 - Fuel Pump Outlet Filter Cover","slug":"ad-pw100-3-fuel-pump-outlet-filter-cover","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":47665,"registerId":"commonwealth-F2006B06382-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/PW100/3 - Fuel Pump Outlet Filter Cover","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 - 106 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Pratt and Whitney Canada Turbine Engines - PW100 Series\n\n \n\nAD/PW100/3 Fuel Pump Outlet Filter Cover 5/91\n\nDM\n\n \n\nApplicability: All PW100 series engines.\n\n \n\nRequirement: Action in accordance with the technical requirements of Transport Canada Airworthiness Directive CF-90-21.\n\n \n\nNote: Netherlands Airworthiness Directive 90-130 refers.\n\n \n\nCompliance: Prior to 30 April 1991.\n\n \n\nBackground:  This Directive requires modification of the engine driven fuel pump outlet filter cover assembly. This requirement reflects the requirements of Transport Canada AD CF- 90-21, and advice of a recent in-flight fuel leak event involving an Australian registered DHC-8. Investigation of this event indicated the leak source to be a cut fuel pump outlet filter cover O-ring.\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 directive adopts and enforces the technical requirements of Transport Canada AD CF-90-21 for all PW100 engines without expanding those technical requirements. It sets a national compliance deadline but does not add extra actions beyond requiring operators to perform the referenced modification (Requirement: Action in accordance with the technical requirements of Transport Canada Airworthiness Directive CF-90-21; Applicability: All PW100 series engines; Compliance: Prior to 30 April 1991)."},"complexity_factors":["Universal applicability to all PW100 series engines increases the number of affected operators and installations (Applicability: All PW100 series engines).","Delegation of technical detail to a foreign airworthiness directive requires operators to obtain and follow Transport Canada AD CF-90-21 (Requirement: Action in accordance with Transport Canada AD CF-90-21).","Firm compliance deadline creates scheduling and logistical pressures for maintenance planning (Compliance: Prior to 30 April 1991).","Safety justification and diagnostic detail are limited to a short background note; investigating authorities and maintainers must translate that into engineering/maintenance actions (Background: in‑flight fuel leak traced to cut pump outlet filter cover O‑ring).","Cross-references to other jurisdictions (Netherlands AD 90-130 noted) can complicate record-keeping and evidence of compliance (Note: Netherlands Airworthiness Directive 90-130 refers)."],"plain_english_summary":"This airworthiness directive requires modification of the engine‑driven fuel pump outlet filter cover assembly on all Pratt & Whitney Canada `PW100` series engines to address an in‑flight fuel leak traced to a cut O‑ring. Operators and maintenance organisations must carry out the technical actions set out in Transport Canada Airworthiness Directive CF‑90‑21 by 30 April 1991."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, time-bound safety directive addressing a specific mechanical defect identified through incident investigation. It has not expanded beyond its original purpose of mandating a fuel pump modification."},"complexity_factors":["Very short document (under 200 words)","Only one substantive requirement: comply with Transport Canada AD CF-90-21","No defined terms section","No cross-references to other Australian legislation beyond Civil Aviation Regulations 1998 Part 39","Single, unambiguous compliance deadline","No conditional logic or exceptions"],"plain_english_summary":"This CASA Airworthiness Directive requires operators of Pratt & Whitney Canada PW100 engines to modify the fuel pump outlet filter cover assembly (adopting Transport Canada AD CF-90-21) to prevent fuel leaks from a cut O‑ring. Prompt compliance is mandated by 30 April 1991. It affects airlines, charter operators and private owners using PW100-powered aircraft and addresses an in‑flight fuel‑leak/fire and engine‑loss risk."}},"importantCases":[],"_links":{"self":"/api/acts/ad-pw100-3-fuel-pump-outlet-filter-cover","history":"/api/acts/ad-pw100-3-fuel-pump-outlet-filter-cover/history","analysis":"/api/acts/ad-pw100-3-fuel-pump-outlet-filter-cover/analysis","conflicts":"/api/acts/ad-pw100-3-fuel-pump-outlet-filter-cover/conflicts","importantCases":"/api/acts/ad-pw100-3-fuel-pump-outlet-filter-cover/important-cases","documents":"/api/acts/ad-pw100-3-fuel-pump-outlet-filter-cover/documents"}}