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Flight crew of an large transport air carrier aircraft experienced an unexplained loss of fuel quantity and requested priority handling from ATC.
| Attributes | |
| ACN | 255836 |
| Time | |
| Date | 199311 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : hbu |
| State Reference | CO |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 70 flight time total : 12000 flight time type : 4000 |
| ASRS Report | 255836 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : instrument pilot : private pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 4000 flight time type : 1500 |
| ASRS Report | 255735 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
During a cvg to sfo flight of 4 hours 17 mins, a position report was made at hbu and indicated a loss of 3000 pounds of fuel. I attributed this to flying at a lower altitude to avoid turbulence. At oal I noticed a loss of 4200 pounds even though we had climbed to altitude. I advised ZOA of a fuel problem (either a gauge or a fuel leak). I requested to be cleared direct to sfo while checking out the problem. No emergency was declared though I advised center we would be at emergency fuel if any delays were encountered or a missed approach was executed. I landed on runway 28L with 6200 pounds of fuel on board and shut down engines with 5800 pounds fuel on board. A maintenance check showed #2 fuel tank to be empty (gauge read 1800 pounds) indicating a fuel leak or gauge problem and the loss of 5700 pounds fuel.
Original NASA ASRS Text
Title: FLC OF AN LGT ACR ACFT EXPERIENCED AN UNEXPLAINED LOSS OF FUEL QUANTITY AND REQUESTED PRIORITY HANDLING FROM ATC.
Narrative: DURING A CVG TO SFO FLT OF 4 HRS 17 MINS, A POS RPT WAS MADE AT HBU AND INDICATED A LOSS OF 3000 LBS OF FUEL. I ATTRIBUTED THIS TO FLYING AT A LOWER ALT TO AVOID TURB. AT OAL I NOTICED A LOSS OF 4200 LBS EVEN THOUGH WE HAD CLBED TO ALT. I ADVISED ZOA OF A FUEL PROB (EITHER A GAUGE OR A FUEL LEAK). I REQUESTED TO BE CLRED DIRECT TO SFO WHILE CHKING OUT THE PROB. NO EMER WAS DECLARED THOUGH I ADVISED CTR WE WOULD BE AT EMER FUEL IF ANY DELAYS WERE ENCOUNTERED OR A MISSED APCH WAS EXECUTED. I LANDED ON RWY 28L WITH 6200 LBS OF FUEL ON BOARD AND SHUT DOWN ENGS WITH 5800 LBS FUEL ON BOARD. A MAINT CHK SHOWED #2 FUEL TANK TO BE EMPTY (GAUGE READ 1800 LBS) INDICATING A FUEL LEAK OR GAUGE PROB AND THE LOSS OF 5700 LBS FUEL.
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.