Pratt & Whitney PW2000 Engine

Pratt & Whitney PW2000 Engine Fault message troubleshooting By Joe Escobar April 2001 Pratt & Whitney’s PW2000 series engines, designed for the Boeing 757, are mid-range thrust gas turbine engines that cover a range of 37,000...


P(S) FCU F/B INT (276-27)
(FCU F/B Intermittent)
This fault is set when the EEC determines that the F/B signal from the FCU LVDT is intermittent.
*** Corrective Action: Check harness feedback circuit per the intermittent fault troubleshooting procedure. Use FCU wiring schematics for circuit information.

P(S) 350-20
(WF F/B Signal Failed)
This fault is set if the channel’s fuel valve feedback signal fails.
*** Corrective Action: Troubleshoot per the fault message troubleshooting procedure. Use FCU wiring schematics for circuit information.
CORRECTIVE ACTION VERIFICATION: Apply alternate power to EEC.

P(S) 351-16
(WF T/M Wraparound)
This fault indicates that this channel’s fuel flow torque motor coil or its wiring harness has a circuit fault.
*** Corrective Action: Troubleshoot per the fault message troubleshooting procedure. Use FCU wiring schematics for circuit information.
CORRECTIVE ACTION VERIFICATION: Apply alternate power to EEC.

P(S) 351-17
(SVA T/M Wraparound)
This fault indicates that this channel’s stator vane torque motor coil or its wiring harness has a circuit fault.
*** Corrective Action: Troubleshoot per the fault message troubleshooting procedure. Use FCU wiring schematics for circuit information.
CORRECTIVE ACTION VERIFICATION: Apply alternate power to EEC.

P(S) 351-21
(AOX T/M Wraparound)
This fault indicates that this channel’s air/oil heat exchanger valve torque motor coil or its wiring harness has a circuit fault.
*** Corrective Action: Troubleshoot per the fault message troubleshooting procedure. Use FCU wiring schematics for circuit information.
CORRECTIVE ACTION VERIFICATION: Apply alternate power to EEC.

P(S) 351-23
(WF Track Check Failed)
This fault indicates the fuel metering valve is not in its commanded position.
*** Corrective Action:
1) Replace FCU.
2) Troubleshoot per the wiring harness troubleshooting procedure. Use FCU wiring schematics for circuit information.
CORRECTIVE ACTION VERIFICATION: Engine run at take-off.

P(S) SVA or FCU/EEC (351-24)
(SVA Track Check Failed)
This fault indicates the stator vane actuator is not in its commanded position.
*** Corrective Action:
1) Replace FCU.
2) If fault persists troubleshoot per the wiring harness inspection/check procedure. Use FCU wiring schematics for circuit formation.
3) If fault persists replace SVA.
4) If fault persists troubleshoot per the wiring harness inspection/check procedure. Use SVA wiring schematics for circuit formation.
CORRECTIVE ACTION VERIFICATION: Engine run at idle or engine run at take-off when possible.

P(S) AOX or FCU/EEC (351-28)
(AOX Track Check Failed)
This fault indicates the air/oil heat exchanger actuator is not in its commanded position.
*** Corrective Action:
1) Replace AOX.
2) If fault persists troubleshoot per the wiring harness inspection/check procedure. Use AOX wiring schematics for circuit formation.
3) If fault persists replace FCU.
4) If fault persists troubleshoot per the wiring harness inspection/check procedure. Use SVA wiring schematics for circuit formation.
CORRECTIVE ACTION VERIFICATION: Engine run at idle or engine run at take-off when possible.

FCU/EEC (353-22)
(WF F/B Crosscheck Failed)
This fault indicates the primary and secondary WF feedback disagree by more than the normal accuracy tolerance. Fault will appear on primary channel only.
*** Corrective Action: Troubleshoot per the fault message troubleshooting procedure. Use FCU wiring schematics for circuit information.
CORRECTIVE ACTION VERIFICATION: Apply alternate power to EEC.

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