A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH THE APU DEFERRED AS INOP BUT THE SPECIAL PROC FOR THE CIRCUIT BREAKER LOCK WAS NOT ACCOMPLISHED.

Narrative

WHILE ACCOMPLISHING MULTIPLE MAINT TASKS ON ACR ACFT XYZ; THE FLC RPTED A L 'WING TO BODY' OVERHEAT CONDITION. THROUGH DEDUCTIVE TROUBLESHOOTING I CONCLUDED THAT THE APU BLEED AIR (PRIOR TO THE LOAD CTL VALVE) WAS THE CAUSE OF THIS OVERHEAT; THUS RENDERING THE APU INOP. I ASKED THE LEAD MECH ON SHIFT TO CONTACT THE 'MAINT OPS CTR' FOR MEL AUTH FOR BOTH THE APU AND THE AUTOLAND PORTION OF THE AUTOPLT WHILE I FINISHED TROUBLESHOOTING A PREVIOUS DISCREPANCY REGARDING THE R AIR DATA SYS AND THEN RETRIEVED AN EXTERNAL AIRCART USED TO START THE ENGS WHEN THE APU IS INOP. WHEN I RETURNED TO THE JETWAY THE LEAD MECH PROVIDED ME WITH ALL THE NECESSARY INFO TO RELEASE THE ACFT FOR FLT UNDER MEL PROVISIONS XX-Y AND ZZ-X. I COMPLETED ALL THE NECESSARY LOGBOOK ENTRIES; CLOSED THE MAIN CABIN DOOR; STARTED THE ENGS AND DISPATCHED THE ACFT FOR FLT. SEVERAL DAYS LATER WHILE RESEARCHING THE COMPUTER ENTRIES (ELECTRONIC LOGBOOK) TO SEE WHAT CORRECTIVE ACTION WAS TAKEN TO REPAIR THE 'WING TO BODY' DISCREPANCY I DISCOVERED THAT I HAD NEGLECTED TO DOCUMENT OR ACCOMPLISH THE SPECIAL PROCS REQUIRED TO DISPATCH AN ACFT UNDER MEL XX-Y WHICH IS TO OPEN AND COLLAR THE BREAKER ON THE APU ACCESSORY UNIT ON THE E3-3 SHELF.