Narrative:

Aircraft arrived in ZZZ1 for discrepancy: aircraft left; oven in first class not heating properly. After talking to the 'a' station flight attendant who stated that the aircraft l-hand forward galley oven was not heating up properly; I contacted maintenance control and consulted about the proper MEL and authority/authorized. The controller stated for me to use MEL 25-10A and I agreed. I checked the MEL book for B737-400 and saw the oven could be MEL'ed. So I accomplished the MEL maintenance procedure which was to pull and collar the appropriate oven circuit breaker. I then accomplished the maintenance log corrective action documentation for the MEL on log page. The aircraft departed ZZZ1 and arrived in ZZZ2 where it was found that I had pulled and collared the circuit breaker for the r-hand oven instead of the l-hand. When I had accomplished this I believed that I was using the correct circuit breaker at the time. Also there was a second error on my part with this discrepancy which was brought to my attention by mr X; maintenance and engineering; that I had entered the wrong MEL reference on the log page. Instead of MEL 25-10A I had entered 25-10B. I believe that I made this mistake accidentally.

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Original NASA ASRS Text

Title: AFTER DEFERRING A LEFT-HAND FORWARD GALLEY OVEN AND RELEASING A B737-400 ACFT; THE DOWNLINE STATION INFORMS MECHANIC HE ACTUALLY DEFERRED THE RIGHT-HAND FORWARD OVEN; PULLED AND COLLARED THE RIGHT CIRCUIT BREAKER AND ENTERED WRONG MEL IN LOGBOOK.

Narrative: ACFT ARRIVED IN ZZZ1 FOR DISCREPANCY: ACFT LEFT; OVEN IN FIRST CLASS NOT HEATING PROPERLY. AFTER TALKING TO THE 'A' STATION FLT ATTENDANT WHO STATED THAT THE ACFT L-HAND FORWARD GALLEY OVEN WAS NOT HEATING UP PROPERLY; I CONTACTED MAINT CTL AND CONSULTED ABOUT THE PROPER MEL AND AUTH. THE CTLR STATED FOR ME TO USE MEL 25-10A AND I AGREED. I CHKED THE MEL BOOK FOR B737-400 AND SAW THE OVEN COULD BE MEL'ED. SO I ACCOMPLISHED THE MEL MAINT PROC WHICH WAS TO PULL AND COLLAR THE APPROPRIATE OVEN CIRCUIT BREAKER. I THEN ACCOMPLISHED THE MAINT LOG CORRECTIVE ACTION DOCUMENTATION FOR THE MEL ON LOG PAGE. THE ACFT DEPARTED ZZZ1 AND ARRIVED IN ZZZ2 WHERE IT WAS FOUND THAT I HAD PULLED AND COLLARED THE CIRCUIT BREAKER FOR THE R-HAND OVEN INSTEAD OF THE L-HAND. WHEN I HAD ACCOMPLISHED THIS I BELIEVED THAT I WAS USING THE CORRECT CIRCUIT BREAKER AT THE TIME. ALSO THERE WAS A SECOND ERROR ON MY PART WITH THIS DISCREPANCY WHICH WAS BROUGHT TO MY ATTN BY MR X; MAINT AND ENGINEERING; THAT I HAD ENTERED THE WRONG MEL REF ON THE LOG PAGE. INSTEAD OF MEL 25-10A I HAD ENTERED 25-10B. I BELIEVE THAT I MADE THIS MISTAKE ACCIDENTALLY.

Data retrieved from NASA's ASRS site as of May 2009 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.