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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier medium large transport had a loss of indicated fuel in the left main. Flight crew elected to divert to alternate to resolve the problem.
| Attributes | |
| ACN | 188093 |
| Time | |
| Date | 199108 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : lkv |
| State Reference | OR |
| Altitude | msl bound lower : 37000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa artcc : zse |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 185 flight time total : 16000 flight time type : 1250 |
| ASRS Report | 188093 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 7000 |
| ASRS Report | 188276 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Flight sea-rno. En route aircraft left main tank fuel gauge lost 3000 pounds. Both tanks had approximately 8500 pounds each with total fob 17000 pounds. Possible fuel gauge/totalizer malfunction or siphoning of left tank (main). Approximately 70 DME north of lakeview VORTAC decision made to land lmt (klamath falls, or) to investigate. After refueling normal flight from lmt to rno. Invaluable ATC assistance throughout aircraft as per conversation by captain and company maintenance had unmodified fuel wiring harness. Previous problems of fuel gauge increase/decrease giving false reading with unmodified harness. No abnormal trim or flight control input during flight. 1 unit left rudder trim average for flight. All company fueling procedures followed. Supplemental information from acn 188276: while completing procedures and xchking gauges with fuel added at sea also believed right gauge reading high. Found had faulty readings in both gauges.
Original NASA ASRS Text
Title: ACR MLG HAD A LOSS OF INDICATED FUEL IN THE L MAIN. FLC ELECTED TO DIVERT TO ALTERNATE TO RESOLVE THE PROBLEM.
Narrative: FLT SEA-RNO. ENRTE ACFT L MAIN TANK FUEL GAUGE LOST 3000 POUNDS. BOTH TANKS HAD APPROX 8500 POUNDS EACH WITH TOTAL FOB 17000 POUNDS. POSSIBLE FUEL GAUGE/TOTALIZER MALFUNCTION OR SIPHONING OF L TANK (MAIN). APPROX 70 DME N OF LAKEVIEW VORTAC DECISION MADE TO LAND LMT (KLAMATH FALLS, OR) TO INVESTIGATE. AFTER REFUELING NORMAL FLT FROM LMT TO RNO. INVALUABLE ATC ASSISTANCE THROUGHOUT ACFT AS PER CONVERSATION BY CAPT AND COMPANY MAINT HAD UNMODIFIED FUEL WIRING HARNESS. PREVIOUS PROBLEMS OF FUEL GAUGE INCREASE/DECREASE GIVING FALSE READING WITH UNMODIFIED HARNESS. NO ABNORMAL TRIM OR FLT CTL INPUT DURING FLT. 1 UNIT L RUDDER TRIM AVERAGE FOR FLT. ALL COMPANY FUELING PROCS FOLLOWED. SUPPLEMENTAL INFO FROM ACN 188276: WHILE COMPLETING PROCS AND XCHKING GAUGES WITH FUEL ADDED AT SEA ALSO BELIEVED R GAUGE READING HIGH. FOUND HAD FAULTY READINGS IN BOTH GAUGES.
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.