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A pilot reported that his aircraft's center tank fuel pumps overrode wing tank fuel pumps so when a wing tank fuel imbalance occurred no procedure was available to turn the center tank pumps off to balance wing tanks.
| Attributes | |
| ACN | 1033240 |
| Time | |
| Date | 201208 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B767-400 and 400 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Fuel Distribution System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 241 Flight Crew Total 25000 Flight Crew Type 6000 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Inflight Event / Encounter Fuel Issue |
Narrative:
During initial cruise with fuel in the center tank; the left tank had 2;000 pounds more than the right tank. Engine fuel flow and the prog page 2 showed both engines using the same amount of fuel. The QRH fuel configuration procedure steps 3 and 4 setup the crossfeed but there is no step to turn off the center tank pumps. The center tank pumps will over pressure and prevent the crossfeed from occurring. This type of fuel imbalance is not an isolated occurrence on this type aircraft.
Original NASA ASRS Text
Title: A pilot reported that his aircraft's center tank fuel pumps overrode wing tank fuel pumps so when a wing tank fuel imbalance occurred no procedure was available to turn the center tank pumps OFF to balance wing tanks.
Narrative: During initial cruise with fuel in the center tank; the left tank had 2;000 LBS more than the right tank. Engine fuel flow and the PROG page 2 showed both engines using the same amount of fuel. The QRH Fuel Configuration procedure steps 3 and 4 setup the crossfeed but there is no step to turn off the center tank pumps. The center tank pumps will over pressure and prevent the crossfeed from occurring. This type of fuel imbalance is not an isolated occurrence on this type aircraft.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.