At level off a B757 first officer notes the left fuel quantity indicator is blank; along with the to...

Narrative:

Upon level off; we noticed the left wing fuel quantity indicator had blanked out and had no quantity readout (along with the total quantity readout). The only indication was the right side tank number; approximately 9.3 showing. We did not have any EICAS warnings. We notified dispatch of our situation and approximated our total fuel using 'the box' total fuel number from prog page. We continued to destination uneventfully after deciding we were not leaking fuel and burning at normal rate. Our fuel quantity readout came back about one hour later during arrival. Maintenance had told us our left tank contained 'contamination' or possible water causing the system to blank out.

Original NASA ASRS Text

Title: At level off a B757 First Officer notes the left fuel quantity indicator is blank; along with the total quantity indicator. The crew elects to continue to destination and the gauges begin operating normally during descent.

Narrative: Upon level off; we noticed the left wing fuel quantity indicator had blanked out and had no quantity readout (along with the total quantity readout). The only indication was the right side tank number; approximately 9.3 showing. We did not have any EICAS warnings. We notified Dispatch of our situation and approximated our total fuel using 'the box' total fuel number from prog page. We continued to destination uneventfully after deciding we were not leaking fuel and burning at normal rate. Our fuel quantity readout came back about one hour later during arrival. Maintenance had told us our left tank contained 'contamination' or possible water causing the system to blank out.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1222561
Time
Date	201412
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Fuel Quantity-Pressure Indication
Person 1
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Fuel Issue

At level off a B757 first officer notes the left fuel quantity indicator is blank; along with the total quantity indicator. The crew elects to continue to destination and the gauges begin operating normally during descent.