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AD/B727/195 - Operating Limitation - Auxiliary Fuel Tank Fuel Pump
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AD/B727/195 - Operating Limitation - Auxiliary Fuel Tank Fuel Pump
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| AD/B727/195 | Operating Limitation - AuxiliaryFuel Tank Fuel Pump | 10/2005 DM |
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| 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. |
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| 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. |
"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." | |
| 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. | |
| Note: FAA AD 2005-13-40 Amdt 39-14177 refers. | |
| Compliance: | Within 30 days after the effective date of this Directive. |
| This Airworthiness Directive becomes effective on 4 August 2005. | |
| 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). |
| 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. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
22 July 2005