{"id":"F2005L02058","name":"AD/B727/195 - Operating Limitation - Auxiliary Fuel Tank Fuel Pump","slug":"ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":36231,"registerId":"commonwealth-F2005L02058-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Boeing 727 Series Aeroplanes","sectionType":"division","heading":"Boeing 727 Series Aeroplanes","content":"### Boeing 727 Series Aeroplanes\n\n| AD/B727/195 | Operating Limitation - AuxiliaryFuel Tank Fuel Pump | 10/2005 DM |\n| ----------- | --------------------------------------------------- | ---------- |\n\n| Applicability: | Model 727, 727C, 727-100, 727-100C, 727-200 and 727-200F series aeroplanes, equipped with an auxiliary fuel tank which has a fuel pump installed.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |\n| -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |\n| Requirement:   | Revise the Limitations section of the Boeing 727 Aircraft Flight Manual (AFM) to contain the following information. This may be accomplished by inserting a copy of this Directive in the AFM.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             |\n|                | \"Auxiliary Tank Fuel PumpsAuxiliary tank fuel pump switches must be positioned `OFF' unless the auxiliary tank(s) contain fuel. Auxiliary tank(s) fuel pumps must be `OFF' unless personnel are available in the flight deck to monitor low pressure lights.When established in a level attitude at cruise, if the auxiliary tank(s) contain usable fuel and the auxiliary tank(s) pump switches are `OFF,' the auxiliary tank(s) pump switches should be positioned `ON' again.Each auxiliary tank fuel pump switch must be positioned `OFF' without delay, for all conditions including takeoff and climb, when the respective auxiliary tank fuel pump low pressure light illuminates.\" |\n|                | When text identical to that above has been included in the general revisions of the AFM, the general revisions may be inserted into the AFM, and the copy of this Directive may be removed from the AFM.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |\n|                | Note: FAA AD 2005-13-40 Amdt 39-14177 refers.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |\n| Compliance:    | Within 30 days after the effective date of this Directive.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |\n|                | This Airworthiness Directive becomes effective on 4 August 2005.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n| Background:    | This Directive is issued following the completion of a design review of the fuel pump installation by the United States Federal Aviation Administration. The review revealed a potential unsafe condition related to the auxiliary fuel tank(s).                                                                                                                                                                                                                                                                                                                                                                                                                                           |\n\n|     | The Directive is issued to prevent dry operation of the fuel pumps for the auxiliary fuel tank, which could create a potential ignition source inside the auxiliary fuel tank that could result in a fire or explosion of the auxiliary fuel tank. The Directive requires the revision of the AFM to include limitations on operating the fuel pumps for the auxiliary fuel tank. |\n| --- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n\n![](image.001.png)  \nDavid Villiers  \nDelegate of the Civil Aviation Safety Authority\n\n22 July 2005","sortOrder":0},{"sectionNumber":"AD/B727/195","sectionType":"part","heading":"AD/B727/195","content":"## AD/B727/195","sortOrder":1},{"sectionNumber":"Operating Limitation - AuxiliaryFuel Tan","sectionType":"part","heading":"Operating Limitation - AuxiliaryFuel Tank Fuel Pump","content":"## Operating Limitation - Auxiliary  \nFuel Tank Fuel Pump","sortOrder":2},{"sectionNumber":"10/2005 DM","sectionType":"part","heading":"10/2005 DM","content":"## 10/2005 DM","sortOrder":3}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The Directive's scope matches its stated purpose in the Background: preventing dry operation of auxiliary fuel pumps by imposing AFM operating limitations. It requires only an AFM revision and crew action within 30 days and does not expand to physical modifications or additional aircraft types."},"complexity_factors":["Narrow applicability: specific Boeing 727 models with auxiliary fuel tanks and pumps (Applicability).","Single, procedural requirement: revise AFM text or insert Directive copy (Requirement).","Operational monitoring obligation for flightcrew: watch low‑pressure lights and act promptly (Requirement).","Short compliance timeframe: 30 days from effective date (Compliance).","No hardware modification required, reducing technical and logistical complexity (Requirement/Background).","Cross-reference to FAA AD indicates coordinated regulatory origin but does not add procedural steps (Requirement/Note).","Enforcement and interpretation discretion reside with the regulator/operator during implementation (implicit in Requirement/Compliance)."],"plain_english_summary":"This Directive requires operators of Boeing 727 variants equipped with auxiliary fuel tanks and pumps to revise the Aircraft Flight Manual (or insert this Directive) so flightcrew follow specified AUX pump ON/OFF rules and to switch pumps OFF immediately if the auxiliary tank low‑pressure light illuminates. Operators must comply within 30 days of the effective date. The change is procedural (AFM revision and crew monitoring) and does not mandate physical modification."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This directive maintains its original narrow scope: addressing a specific safety issue with auxiliary fuel tank pumps on Boeing 727 aircraft. The scope has not expanded beyond this original technical safety purpose."},"complexity_factors":["Single, specific technical requirement (manual revision)","Only 4 operational conditions to implement","No defined terms section","No cross-references to other legislation (only a reference to the corresponding FAA directive)","Clear, linear structure: applicability → requirement → compliance → background","Minimal conditional logic (simple 'if-then' operational rules)","Short document (approximately 300 words of substantive content)"],"plain_english_summary":"This AD requires operators of Boeing 727 series aircraft with auxiliary fuel tanks to update flight manuals with new limitations on auxiliary fuel-pump use so pumps aren’t run dry or without cockpit monitoring. It targets 727/727C/727-100/727-100C/727-200/727-200F operators to reduce pump overheating and the resulting fire/explosion risk. Changes were due within 30 days of 4 Aug 2005."}},"importantCases":[],"_links":{"self":"/api/acts/ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump","history":"/api/acts/ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump/history","analysis":"/api/acts/ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump/analysis","conflicts":"/api/acts/ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump/conflicts","importantCases":"/api/acts/ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump/important-cases","documents":"/api/acts/ad-b727-195-operating-limitation-auxiliary-fuel-tank-fuel-pump/documents"}}