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Subsequent to what they felt was a minor fuel service form discrepancy, flight crew of MD11 discover fuel quantity system is unreliable. Aircraft is taken OTS for examination and repair.
| Attributes | |
| ACN | 627456 |
| Time | |
| Date | 200408 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : bjc.tower |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | ground : preflight ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : instrument pilot : multi engine pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 12500 flight time type : 1500 |
| ASRS Report | 627456 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation non adherence : far non adherence : company policies |
| Independent Detector | aircraft equipment other aircraft equipment : fuel gauges other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
Discovered fuel loading slip discrepancy. Resolved with accuracy and reliability of aircraft quantity measuring system. After takeoff, aircraft fuel system became unreliable. Upon landing estimated 19000 pounds more fuel on board than indicated. Aircraft quantity measuring system had previous unreliability issues that were not brought to the attention of operating flight crew. Further investigation, post our experience, produced similar unreliability issues. Aircraft taken OTS for investigation into fuel irregularities. Retrospectively, takeoff weights were under-estimated. Scheduled meeting with flight management to further concerns.
Original NASA ASRS Text
Title: SUBSEQUENT TO WHAT THEY FELT WAS A MINOR FUEL SVC FORM DISCREPANCY, FLT CREW OF MD11 DISCOVER FUEL QUANTITY SYS IS UNRELIABLE. ACFT IS TAKEN OTS FOR EXAMINATION AND REPAIR.
Narrative: DISCOVERED FUEL LOADING SLIP DISCREPANCY. RESOLVED WITH ACCURACY AND RELIABILITY OF ACFT QUANTITY MEASURING SYS. AFTER TKOF, ACFT FUEL SYS BECAME UNRELIABLE. UPON LNDG ESTIMATED 19000 LBS MORE FUEL ON BOARD THAN INDICATED. ACFT QUANTITY MEASURING SYS HAD PREVIOUS UNRELIABILITY ISSUES THAT WERE NOT BROUGHT TO THE ATTN OF OPERATING FLT CREW. FURTHER INVESTIGATION, POST OUR EXPERIENCE, PRODUCED SIMILAR UNRELIABILITY ISSUES. ACFT TAKEN OTS FOR INVESTIGATION INTO FUEL IRREGULARITIES. RETROSPECTIVELY, TKOF WTS WERE UNDER-ESTIMATED. SCHEDULED MEETING WITH FLT MGMNT TO FURTHER CONCERNS.
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.