A B737-500 CTR FUEL TANK JET PUMP WAS REPLACED. LEAD TECHNICIAN ENTERED PART NUMBER IN THE MAINT COMPUTER. LATER DISCOVERED INCORRECT PART INSTALLED.

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ON THE EVENING OF DEC/SAT/06; I WAS ASSIGNED TO BE THE LEAD ON ACFT XXX WHICH WAS OTS FOR A TANK DIVE. AT XA30 MY START TIME I RECEIVED A TURN OVER THAT (SUPPLIER) WAS ON THE ACFT WITH PARTS ON HAND. THE PART HAD BEEN IDENTED; ORDERED AND DELIVERED ON A PREVIOUS SHIFT. THEY WERE PURGING THE TANKS BEFORE ENTERING. I ALSO WAS ASSIGNED TO LEAD ACFT XXX GEAR EXTEND/RETRACT OPS CHK. THE TANK DIVER FINISHED INSTALLING THE PART AROUND XE30. LEAK CHKS WERE COMPLETED AT XB30. I REVIEWED THE CONTRACT MAINT PAPERWORK AND THE ATTACHED FORM. THEY WERE ALL COMPLETE. I THEN PROCEEDED TO SIGN OFF THE INSTALLED PART NUMBER. THINKING THAT GMM XX-XX-XX WOULD RELIEVE ME OF ANY WRONGDOING OF THE WORK BEING PERFORMED BY (SUPPLIER). I THEN ENTERED THE INSTALLED PART NUMBER IN THE MAINT COMPUTER AFTER WHICH I RECEIVED A FORCED PARTS SCREEN. I ENTERED THE REQUIRED INFO ON THAT AND THE PAGE WAS ACCEPTED. I NEVER PHYSICALLY CHKED THE IPC BECAUSE I WAS UNDER THE IMPRESSION THAT ACCORDING TO BULLETIN; IF THERE WAS AN ISSUE WITH THE INTERCHANGEABILITY OF THE PARTS MAINT COMPUTER WOULD REQUIRE ME TO PROVIDE AN IPC REF.