A B737-700 WAS DISPATCHED IN NON COMPLIANCE WITH 1 INCORRECT NOSE TIRE INSTALLED.

Narrative

ON NOV/TUE/03; I WAS WORKING ON ACFT. I WAS DOING A CHK AND DECIDED THAT THE NOSE TIRES NEEDED TO BE REPLACED; SO I WENT TO RETRIEVE A SET OF LINES SO THAT I COULD BEGIN TO REPLACE THE TIRES PER THE MAINT MANUAL. I NEEDED TO TRY TO FINISH QUICKLY BECAUSE SOMEBODY ELSE NEEDED THE NOSE JACK. WHEN I WAS DOWN; I BEGAN TO FILL OUT MY TAGS AND MY PAPERWORK. I FINISHED MY CHK AND PROCEEDED TO SHUT THE ACFT DOWN FOR THE NIGHT. AS FAR AS I KNEW; I HAD COMPLETED MY JOB CORRECTLY. ON NOV/SAT/03; AT XA30; I RECEIVED A COPY OF ACFT HISTORY WHICH SHOWED THE TIRE CHANGE MADE BY ME ON NOV/TUE/03. I ALSO RECEIVED A COPY OF THE LOG PAGE DATED NOV/SAT/03; WHICH STATED THAT ON THAT DAY ON A THROUGH FLT; THE FO NOTICED UNFAMILIAR TREAD ON THE NOSE TIRES. THE MECH PROCEEDED TO CHANGE THE NOSE TIRES ON THE ACFT. AS A RESULT; WHAT WAS FOUND OUT WAS THAT ONE OF THE NOSE TIRES WAS A 300/500 TIRE AND THE OTHER TIRE WAS 700 NOSE TIRE. I CANNOT BELIEVE THIS HAPPENED AND HOW I WAS NOT ABLE TO CATCH THIS BEFORE THE ACFT LEFT MY STATION. I AM ONLY GRATEFUL THAT THERE WERE NO SERIOUS CONSEQUENCES AND THAT THE PROB WAS CORRECTED. I BELIEVE THAT; IN MY HURRY TO HELP OTHER FELLOW MECHS THAT NIGHT; I NEGLECTED TO PAY CLOSE ATTN TO MY PARTS TAGS; PAPERWORK AND PART NUMBERS. THE LESSON I HAVE LEARNED IS THAT THIS COULD HAVE BEEN AVOIDED HAD I PAID MORE ATTN AND DOUBLE-CHKED MY PAPERWORK; PART NUMBERS AND EQUIP.