{"id":"F2006B02676","name":"AD/B727/154 - Fuel Valve Actuator Replacement","slug":"ad-b727-154-fuel-valve-actuator-replacement","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41992,"registerId":"commonwealth-F2006B02676-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/B727/154 - Fuel Valve Actuator Replacement","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nBoeing 727 Series Aeroplanes\n\nAD/B727/154 Fuel Valve Actuator Replacement 13/98\n\nApplicability: Model 727 aircraft equipped with J. C. Carter Company Fuel Valve Actuators having part number (P/N) 40574-2 (Kearfott Models 3715-7 and -8) or 40574-5 (Kearfott\n\nModel 3715-9).\n\nRequirement: Replace all effected fuel valve actuators with acceptable items in accordance with the directions given in either J.C. Carter Company Service Bulletin 61163-28-09 dated 28 September 1995, or J. C. Carter Company Service Bulletin 61163-28-09 dated\n\n1 May 1996.\n\nNote: FAA AD 98-18-20 Amendment 39-10736 refers.\n\nCompliance: Within 36 months of the effective date of this Directive.\n\nThis Airworthiness Directive becomes effective on 3 December 1998.\n\nBackground: Service experience has revealed a possible fault in the subject actuators which could prevent the pilot from shutting off the fuel to the engine following an engine failure and/or fire. This Directive has been raised to replace the effected components with serviceable items.","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"The Directive enforces the original stated purpose: replacing specified faulty fuel valve actuators on affected 727s within a set timeframe. It does not expand or narrow the applicability beyond the listed part numbers and models, and it implements the remedial action described in the Background and Requirement."},"complexity_factors":["Narrow applicability to specific part numbers and Boeing 727 models (Applicability).","Mandatory replacement procedure tied to manufacturer service bulletins with two dated versions to follow (Requirement).","Fixed compliance window of 36 months creates scheduling and operational planning burdens (Compliance).","Safety-critical hardware change that can require parts procurement and aircraft downtime (Background/Requirement).","Regulatory cross-reference to FAA AD 98-18-20 increases reliance on foreign regulator documentation (Note)."],"plain_english_summary":"This Airworthiness Directive orders operators of Boeing 727 aircraft fitted with J.C. Carter fuel valve actuators P/N 40574-2 or 40574-5 to replace those actuators with approved serviceable items within 36 months, following the cited J.C. Carter service bulletin. It responds to a reported actuator fault that could prevent shutting off engine fuel after a failure or fire.\n\nAircraft operators bear the cost and must follow the specified service bulletin; the Civil Aviation Safety Authority sets and enforces the compliance deadline."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, targeted safety directive addressing a specific mechanical defect in a specific aircraft type. It has not expanded beyond its original purpose of mandating replacement of faulty fuel valve actuators."},"complexity_factors":["Very short document (under 300 words)","Only 2 defined part numbers to identify applicability","Single, unambiguous compliance action (replacement)","Clear deadline (36 months from effective date)","No nested exceptions, conditional logic, or cross-references to other legislation beyond a single reference to FAA AD for background","Straightforward applicability test (specific aircraft model + specific part numbers)"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of certain Boeing 727s to replace specific J.C. Carter fuel valve actuators because they may prevent pilots from shutting off engine fuel in an emergency. Affects aircraft fitted with the listed parts; replacements must follow the manufacturer’s service bulletins and be completed within 36 months of 3 December 1998. Compliance is mandatory—non‑compliant aircraft cannot legally fly."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-154-fuel-valve-actuator-replacement","history":"/api/acts/ad-b727-154-fuel-valve-actuator-replacement/history","analysis":"/api/acts/ad-b727-154-fuel-valve-actuator-replacement/analysis","conflicts":"/api/acts/ad-b727-154-fuel-valve-actuator-replacement/conflicts","importantCases":"/api/acts/ad-b727-154-fuel-valve-actuator-replacement/important-cases","documents":"/api/acts/ad-b727-154-fuel-valve-actuator-replacement/documents"}}