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F100 PIC elects to return land at lga when a fuel imbal noted was not correctable. The circuit breaker for the xfeed was popped and, after 1 reset, popped again. The fuel imbal continued to increase so he wisely chose to declare an emergency to expedite his return to lga. He was 60 mi from the departure airport.
| Attributes | |
| ACN | 384067 |
| Time | |
| Date | 199710 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lga |
| State Reference | NY |
| Altitude | msl bound lower : 20000 msl bound upper : 20000 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude other other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 384067 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Frequency: 132.17. Altitude: FL200. ATC facility: ZNY. Location: J95 between gayel and stomp approximately 60 mi wnw of lga. Climbing out of lga, noticed fuel imbal between right and left wing tank of approximately 350 pounds. Attempted xfeed. Flow bar would not illuminate indicating no xfeed capability. Checked circuit breakers and found fuel xfeed circuit breaker popped. Reset once, but popped again. Fuel imbal continued to increase. Turned back for lga and declared emergency to expedite our return. Landed uneventfully with an imbal of approximately 1500 pounds. Callback conversation with reporter revealed the following information: reporter said that the allowable imbal was 2200 pounds, differential upon landing was 1500 pounds. He had attempted to use differential power, less power on the left engine, but the fuel on the right side still depleted faster than the fuel on the left side. Reporter suspects a form of fuel migration had occurred with a partially opened fuel xfeed valve. Maintenance appeared to have been satisfied that their changing the xfeed valve and the circuit breaker had solved this fuel feed problem.
Original NASA ASRS Text
Title: F100 PIC ELECTS TO RETURN LAND AT LGA WHEN A FUEL IMBAL NOTED WAS NOT CORRECTABLE. THE CIRCUIT BREAKER FOR THE XFEED WAS POPPED AND, AFTER 1 RESET, POPPED AGAIN. THE FUEL IMBAL CONTINUED TO INCREASE SO HE WISELY CHOSE TO DECLARE AN EMER TO EXPEDITE HIS RETURN TO LGA. HE WAS 60 MI FROM THE DEP ARPT.
Narrative: FREQ: 132.17. ALT: FL200. ATC FACILITY: ZNY. LOCATION: J95 BTWN GAYEL AND STOMP APPROX 60 MI WNW OF LGA. CLBING OUT OF LGA, NOTICED FUEL IMBAL BTWN R AND L WING TANK OF APPROX 350 LBS. ATTEMPTED XFEED. FLOW BAR WOULD NOT ILLUMINATE INDICATING NO XFEED CAPABILITY. CHKED CIRCUIT BREAKERS AND FOUND FUEL XFEED CIRCUIT BREAKER POPPED. RESET ONCE, BUT POPPED AGAIN. FUEL IMBAL CONTINUED TO INCREASE. TURNED BACK FOR LGA AND DECLARED EMER TO EXPEDITE OUR RETURN. LANDED UNEVENTFULLY WITH AN IMBAL OF APPROX 1500 LBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR SAID THAT THE ALLOWABLE IMBAL WAS 2200 LBS, DIFFERENTIAL UPON LNDG WAS 1500 LBS. HE HAD ATTEMPTED TO USE DIFFERENTIAL PWR, LESS PWR ON THE L ENG, BUT THE FUEL ON THE R SIDE STILL DEPLETED FASTER THAN THE FUEL ON THE L SIDE. RPTR SUSPECTS A FORM OF FUEL MIGRATION HAD OCCURRED WITH A PARTIALLY OPENED FUEL XFEED VALVE. MAINT APPEARED TO HAVE BEEN SATISFIED THAT THEIR CHANGING THE XFEED VALVE AND THE CIRCUIT BREAKER HAD SOLVED THIS FUEL FEED PROB.
Data retrieved from NASA's ASRS site as of July 2007 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.