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A B737-300 captain reports after deferral of left tank fuel quantity and fuel summation per the MEL when airborne received 'buffet alert.'
| Attributes | |
| ACN | 650673 |
| Time | |
| Date | 200503 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 1000 |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial |
| Route In Use | departure sid : n/s |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Experience | flight time last 90 days : 200 flight time total : 14000 flight time type : 10000 |
| ASRS Report | 650673 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : 'buffet alert' warning other flight crewa other flight crewb |
| Resolutory Action | none taken : unable none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals performance deficiency : fault isolation performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft had a maintenance deferral for left main fuel gauge inoperative. Fuel summation unit was disabled per MEL. This caused a 'buffet alert' message to come up on the FMC on takeoff as soon as we were airborne. We had this aircraft for 2 legs ZZZ-ZZZ1 flight zzbc and ZZZ1-ZZZ2 flight dee and this FMC message came up on both takeoffs. This is an unsafe condition caused by the maintenance deferral procedure of disabling the fuel summation unit.
Original NASA ASRS Text
Title: A B737-300 CAPT RPTS AFTER DEFERRAL OF L TANK FUEL QUANTITY AND FUEL SUMMATION PER THE MEL WHEN AIRBORNE RECEIVED 'BUFFET ALERT.'
Narrative: ACFT HAD A MAINT DEFERRAL FOR L MAIN FUEL GAUGE INOP. FUEL SUMMATION UNIT WAS DISABLED PER MEL. THIS CAUSED A 'BUFFET ALERT' MESSAGE TO COME UP ON THE FMC ON TKOF AS SOON AS WE WERE AIRBORNE. WE HAD THIS ACFT FOR 2 LEGS ZZZ-ZZZ1 FLT ZZBC AND ZZZ1-ZZZ2 FLT DEE AND THIS FMC MESSAGE CAME UP ON BOTH TKOFS. THIS IS AN UNSAFE CONDITION CAUSED BY THE MAINT DEFERRAL PROC OF DISABLING THE FUEL SUMMATION UNIT.
Data retrieved from NASA's ASRS site as of January 2009 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.