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A B737-700 crew noted that the fuel quantity value was not automatically entering the FMC and subsequently maintenance MEL'ed the FMC for automated VNAV operation because performance data would be inaccurate.
| Attributes | |
| ACN | 1006466 |
| Time | |
| Date | 201204 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | First Officer |
| Experience | Flight Crew Last 90 Days 390 |
| Person 2 | |
| Function | Captain |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 454 Flight Crew Type 9600 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural MEL |
Narrative:
During preflight operations; after refueling; the captain noticed that the fuel quantity in the FMC was still at the inbound fuel state (the FMC fuel quantity was not automatically updating). Maintenance issued MEL 34-36-02; which essentially rendered our fmcs inoperative; leaving us to operate at a lower automation level than desired. Everything else operated normally. The captain advised after discussion with the assistant chief pilot on call and dispatch; this was the correct MEL. As a result; we departed late.
Original NASA ASRS Text
Title: A B737-700 crew noted that the fuel quantity value was not automatically entering the FMC and subsequently Maintenance MEL'ed the FMC for automated VNAV operation because performance data would be inaccurate.
Narrative: During preflight operations; after refueling; the Captain noticed that the fuel quantity in the FMC was still at the inbound fuel state (the FMC fuel quantity was not automatically updating). Maintenance issued MEL 34-36-02; which essentially rendered our FMCs inoperative; leaving us to operate at a lower automation level than desired. Everything else operated normally. The Captain advised after discussion with the Assistant Chief Pilot on Call and Dispatch; this was the correct MEL. As a result; we departed late.
Data retrieved from NASA's ASRS site as of July 2013 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.