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A B737-700 was dispatched in non compliance with the right thrust reverser deferred as inoperative per the MEL, but special procedures on collaring circuit breakers not accomplished.
| Attributes | |
| ACN | 631755 |
| Time | |
| Date | 200409 |
| Day | Wed |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 631755 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Environmental Factor Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Minimum Equipment List |
Narrative:
I was called out on aircraft X. The aircraft block turned back to the gate due to a thrust reverser overhead light illuminated on the #2 engine and that thrust reverser was already on MEL 78-1. I reviewed the MEL and the associated maintenance manual procedures and found out that the 2 circuit breakers associated with it were not pulled and collared. It was the sync lock and the control circuit breakers. Since the procedures calls out to do it step by step, I reaccomplished the whole maintenance manual 78-00-00 page 901-904 procedures.
Original NASA ASRS Text
Title: A B737-700 WAS DISPATCHED IN NON COMPLIANCE WITH THE R THRUST REVERSER DEFERRED AS INOP PER THE MEL, BUT SPECIAL PROCS ON COLLARING CIRCUIT BREAKERS NOT ACCOMPLISHED.
Narrative: I WAS CALLED OUT ON ACFT X. THE ACFT BLOCK TURNED BACK TO THE GATE DUE TO A THRUST REVERSER OVERHEAD LIGHT ILLUMINATED ON THE #2 ENG AND THAT THRUST REVERSER WAS ALREADY ON MEL 78-1. I REVIEWED THE MEL AND THE ASSOCIATED MAINT MANUAL PROCS AND FOUND OUT THAT THE 2 CIRCUIT BREAKERS ASSOCIATED WITH IT WERE NOT PULLED AND COLLARED. IT WAS THE SYNC LOCK AND THE CTL CIRCUIT BREAKERS. SINCE THE PROCS CALLS OUT TO DO IT STEP BY STEP, I REACCOMPLISHED THE WHOLE MAINT MANUAL 78-00-00 PAGE 901-904 PROCS.
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.