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A B737-400 during a ground test of the speed brake system found a fuel quantity trim data shield wedged in the speed brake control rod.
| Attributes | |
| ACN | 623130 |
| Time | |
| Date | 200407 |
| Day | Fri |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 623130 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : speed brake arm light other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : scheduled maintenance performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
During testing of speed brake system, found a fuel quantity trim unit data shield previously removed wedged between lower speed brake control rod and subfloor. Removed data shield, checked all 3 fuel quantity trim units for data shield all installed, performed system tests, cleared MEL.
Original NASA ASRS Text
Title: A B737-400 DURING A GND TEST OF THE SPD BRAKE SYS FOUND A FUEL QUANTITY TRIM DATA SHIELD WEDGED IN THE SPD BRAKE CTL ROD.
Narrative: DURING TESTING OF SPD BRAKE SYS, FOUND A FUEL QUANTITY TRIM UNIT DATA SHIELD PREVIOUSLY REMOVED WEDGED BTWN LOWER SPD BRAKE CTL ROD AND SUBFLOOR. REMOVED DATA SHIELD, CHKED ALL 3 FUEL QUANTITY TRIM UNITS FOR DATA SHIELD ALL INSTALLED, PERFORMED SYS TESTS, CLRED MEL.
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.