Narrative:

Taxiing for takeoff, I turned on the right air conditioning system (pack) for the first time. The compressor discharge temperature rose above limits and there was no rise in electrical system loads, indicating a failure of the pack cooling motor. A check of the circuit breaker for the motor revealed it was pulled and collared with a red maintenance band. A review of the logbook showed that maintenance had pulled and collared the breaker while correcting a generator problem. The record showed the work was completed and the system returned to service after checking ok. There were no open maintenance actions listed in the log. We returned to the gate and had maintenance review their records pull the collar, reset the breaker, and verify all work was done in accordance with the FARS.

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Original NASA ASRS Text

Title: A B727-200 PRIOR TO TKOF RETURNED TO THE GATE DUE TO R PACK COOLING FAN CIRCUIT BREAKER FOUND TRIPPED. CAUSED BY NO RESET AFTER MAINT.

Narrative: TAXIING FOR TKOF, I TURNED ON THE R AIR CONDITIONING SYS (PACK) FOR THE FIRST TIME. THE COMPRESSOR DISCHARGE TEMP ROSE ABOVE LIMITS AND THERE WAS NO RISE IN ELECTRICAL SYS LOADS, INDICATING A FAILURE OF THE PACK COOLING MOTOR. A CHK OF THE CIRCUIT BREAKER FOR THE MOTOR REVEALED IT WAS PULLED AND COLLARED WITH A RED MAINT BAND. A REVIEW OF THE LOGBOOK SHOWED THAT MAINT HAD PULLED AND COLLARED THE BREAKER WHILE CORRECTING A GENERATOR PROB. THE RECORD SHOWED THE WORK WAS COMPLETED AND THE SYS RETURNED TO SVC AFTER CHKING OK. THERE WERE NO OPEN MAINT ACTIONS LISTED IN THE LOG. WE RETURNED TO THE GATE AND HAD MAINT REVIEW THEIR RECORDS PULL THE COLLAR, RESET THE BREAKER, AND VERIFY ALL WORK WAS DONE IN ACCORDANCE WITH THE FARS.

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.