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Fuel crossfeed valve froze in in-transit position during cruise. Valve became unstuck descending through 4000' at sfo.
| Attributes | |
| ACN | 109432 |
| Time | |
| Date | 198904 |
| Day | Sat |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 4000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other descent other |
| Route In Use | enroute airway : zdv |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 180 flight time total : 15000 flight time type : 10000 |
| ASRS Report | 109432 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | aircraft : equipment problem dissipated |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Fuel xfeed valve failed (in transit) position. The aircraft already had a bad #1 fuel quantity indicator (as it turned out, the xfeed valve froze). Descending through 4000' at sfo, the valve unfroze. Recommend a heat source for all xfeed valves.
Original NASA ASRS Text
Title: FUEL CROSSFEED VALVE FROZE IN IN-TRANSIT POSITION DURING CRUISE. VALVE BECAME UNSTUCK DESCENDING THROUGH 4000' AT SFO.
Narrative: FUEL XFEED VALVE FAILED (IN TRANSIT) POSITION. THE ACFT ALREADY HAD A BAD #1 FUEL QUANTITY INDICATOR (AS IT TURNED OUT, THE XFEED VALVE FROZE). DESCENDING THROUGH 4000' AT SFO, THE VALVE UNFROZE. RECOMMEND A HEAT SOURCE FOR ALL XFEED VALVES.
Data retrieved from NASA's ASRS site as of August 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.