A mechanic was instructed to reset all the circuit breakers that were opened during the gear jacking...

Narrative:

Aircraft was in the hangar for a gear retract/extend problem. I was instructed to help with the down jacking after the gear swing. I was instructed to reset the cbs that were opened during jacking. The number of cbs was not documented nor a description or location. I closed all the cbs I saw in the flight deck. I missed ATC-1 circuit breaker located behind the captain's chair; which is hidden behind a coiled map light cord. The aircraft flew 1 flight leg to ZZZ where it was discovered. The flight crew missed this on their preflight as well. No damage to aircraft occurred. Our general procedures manual was changed to correct this problem. We now document how many and where the cbs were opened in the logbook. Callback conversation with reporter revealed the following information: reporter stated the circuit breaker ATC-1; that was missed and not closed; is their aircraft transponder.

Original NASA ASRS Text

Title: A Mechanic was instructed to reset all the circuit breakers that were opened during the gear jacking procedure on their B737-800. He and the flight crew missed the ATC-1 circuit breaker that was found still opened; at the next station.

Narrative: Aircraft was in the hangar for a gear retract/extend problem. I was instructed to help with the down jacking after the gear swing. I was instructed to reset the CBs that were opened during jacking. The number of CBs was not documented nor a description or location. I closed all the CBs I saw in the flight deck. I missed ATC-1 CB located behind the Captain's chair; which is hidden behind a coiled map light cord. The aircraft flew 1 flight leg to ZZZ where it was discovered. The flight crew missed this on their preflight as well. No damage to aircraft occurred. Our General Procedures Manual was changed to correct this problem. We now document how many and where the CBs were opened in the logbook. Callback conversation with Reporter revealed the following information: Reporter stated the circuit breaker ATC-1; that was missed and not closed; is their aircraft Transponder.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	823059
Time
Date	200901
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-800
Flight Phase	Parked
Component
Aircraft Component	Circuit Breaker / Fuse / Thermocouple
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Experience	Maintenance Technician 14
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

A mechanic was instructed to reset all the circuit breakers that were opened during the gear jacking procedure on their B737-800. He and the flight crew missed the ATC-1 circuit breaker that was found still opened; at the next station.