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A B737-300 was dispatched in non compliance with a faulty fuel quantity indicator in #2 position. Indicators swapped for troubleshooting and #1 indicator replaced with new instrument.
| Attributes | |
| ACN | 561985 |
| Time | |
| Date | 200209 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked ground : pushback |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 561985 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : fuel quantity indicator other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : installation performance deficiency : testing performance deficiency : repair |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Environmental Factor |
| Primary Problem | Maintenance Human Performance |
Narrative:
While running a gate call on aircraft, 5 mins prior to departure time, I swapped the #1 and #2 fuel quantity gauges in the cockpit to see if the 'slow to test' and 'inaccurate indication' complaints followed the instrument or stayed in the same location or followed the instrument. I was my assessment the problem was with the instrument and proceeded to remove the faulty instrument and replace it with a new instrument. After replacing the new instruments I tested the instruments. They zeroed quickly and returned to indicate proper levels. It is possible that in the troubleshooting process that good instrument was inadvertently removed from service while attempting to fix the aircraft and make push time.
Original NASA ASRS Text
Title: A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH A FAULTY FUEL QUANTITY INDICATOR IN #2 POS. INDICATORS SWAPPED FOR TROUBLESHOOTING AND #1 INDICATOR REPLACED WITH NEW INST.
Narrative: WHILE RUNNING A GATE CALL ON ACFT, 5 MINS PRIOR TO DEP TIME, I SWAPPED THE #1 AND #2 FUEL QUANTITY GAUGES IN THE COCKPIT TO SEE IF THE 'SLOW TO TEST' AND 'INACCURATE INDICATION' COMPLAINTS FOLLOWED THE INST OR STAYED IN THE SAME LOCATION OR FOLLOWED THE INST. I WAS MY ASSESSMENT THE PROB WAS WITH THE INST AND PROCEEDED TO REMOVE THE FAULTY INST AND REPLACE IT WITH A NEW INST. AFTER REPLACING THE NEW INSTS I TESTED THE INSTS. THEY ZEROED QUICKLY AND RETURNED TO INDICATE PROPER LEVELS. IT IS POSSIBLE THAT IN THE TROUBLESHOOTING PROCESS THAT GOOD INST WAS INADVERTENTLY REMOVED FROM SVC WHILE ATTEMPTING TO FIX THE ACFT AND MAKE PUSH TIME.
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.