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A B777 returned to the gate on taxi out with EICAS warning on right thrust reverser. Found circuit breakers pulled for maintenance and never reset.
| Attributes | |
| ACN | 626277 |
| Time | |
| Date | 200408 |
| Day | Sun |
| 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 | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 26 |
| ASRS Report | 626277 |
| 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 : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other flight crewa other flight crewb |
| Resolutory Action | flight crew : rejected takeoff other |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : logbook entry performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : testing |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Air carrier X flight abc on aug/sun/04, returned to gate with EICAS message 'engine reverser limited right.' problem was circuit breakers were found out for the #2 engine reverser. Prior to departure, #2 engine reverser was deactivated for maintenance reasons on #2 engine. After maintenance work accomplished #2 engine reverser was reactivated, but the associated circuit breakers were not reset. I signed the work card off for the reactivation of #2 engine reverser. Since this was a turn over from another shift I was unaware these circuit breakers were pulled. Proper work control records were made to cover this item. I was unaware of the fact that these breakers were pulled for this particular job card. I just misread the job card stating the reverser was deactivated per maintenance manual procedures that required these circuit breakers be reset after reactivation of reverser.
Original NASA ASRS Text
Title: A B777 RETURNED TO THE GATE ON TAXI OUT WITH EICAS WARNING ON R THRUST REVERSER. FOUND CIRCUIT BREAKERS PULLED FOR MAINT AND NEVER RESET.
Narrative: ACR X FLT ABC ON AUG/SUN/04, RETURNED TO GATE WITH EICAS MESSAGE 'ENG REVERSER LIMITED R.' PROB WAS CIRCUIT BREAKERS WERE FOUND OUT FOR THE #2 ENG REVERSER. PRIOR TO DEP, #2 ENG REVERSER WAS DEACTIVATED FOR MAINT REASONS ON #2 ENG. AFTER MAINT WORK ACCOMPLISHED #2 ENG REVERSER WAS REACTIVATED, BUT THE ASSOCIATED CIRCUIT BREAKERS WERE NOT RESET. I SIGNED THE WORK CARD OFF FOR THE REACTIVATION OF #2 ENG REVERSER. SINCE THIS WAS A TURN OVER FROM ANOTHER SHIFT I WAS UNAWARE THESE CIRCUIT BREAKERS WERE PULLED. PROPER WORK CTL RECORDS WERE MADE TO COVER THIS ITEM. I WAS UNAWARE OF THE FACT THAT THESE BREAKERS WERE PULLED FOR THIS PARTICULAR JOB CARD. I JUST MISREAD THE JOB CARD STATING THE REVERSER WAS DEACTIVATED PER MAINT MANUAL PROCS THAT REQUIRED THESE CIRCUIT BREAKERS BE RESET AFTER REACTIVATION OF REVERSER.
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.