Commercial Fixed Wing
Maintenance Airframe; Maintenance Powerplant
Troubleshooting
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Aircraft; MEL; Manuals
My crew chief assigned me to another carrier's aircraft.I went on my way to the gate along with my co-worker to relieve a mechanic from the line. The mechanic was talking to Maintenance Control (MC) when we showed up. I went to check what was going on and found out that there was a write up about refuel panel power INOP. We were on stand-by just in case he needed help. The mechanic was speaking to MC the whole time we were troubleshooting. The mechanic was instructing me and my partner what MC wanted us to do. He told us to bag and tie the cannon plug from center tank as he was on the phone with MC. The mechanic and my co-worker stayed on that airplane meanwhile I perform the Pre Departure Check (PDC) on the arriving flight.
As the airplane rolled into the gate I walked out and proceeded to do Extended Range Twin Operations (ETOPS) Pre Departure Check (PDC) procedure. As I made my way to the flight deck the fueler reported no power going to the refueling panel. I rebooted aircraft power and still no power to refueling panel. I noticed in the flight deck that 2 breakers were out ('FUEL PANEL IND' and 'FUEL PANEL CONT'). I Notified Maintenance Control (MC) and was advised to reset said circuit breakers at which point the FUEL PANEL IND popped again but now there was power at the refuel panel. Was told by MC that we could defer the indication at the panel but had to troubleshoot which indication was not working to use the correct MEL procedure. I was in the flight deck on the phone with MC; another mechanic was at the nose of the aircraft watching me and signaling to another mechanic which indicators to disconnect. After trouble shooting found out that the Center Refueling Indication was INOP at which point MC was sending us the documents for the MEL Procedure. We completed the MEL procedure with the assistance of MC. The log book was signed by myself and reviewed by MC prior to releasing the logbook to the pilots.
Two air carrier mechanics reported that while attempting to refuel the aircraft they discovered there was no power to the fueling panel.