AN MD-80 TECHNICIAN RPTS WORKING ON A FUEL QUANTITY MALFUNCTION; AND INSTALLED AN INCORRECT PART SENT TO THE STATION SPECIFICALLY FOR THIS AIRPLANE.

Narrative

THAT NIGHT I WAS WORKING ON 2 ACFT. WHILE WORKING ON ACFT X WITH A FUEL INDICATING PROB; I CHANGED THE FUEL QUANTITY INDICATOR IN THE COCKPIT -- THAT DID NOT FIX THE PROB. NEXT I REPLACED THE FUEL QUANTITY MODULE LOCATED BEHIND THE AFT WALL OF THE CTR CARGO PIT. THE MODULE THAT HAD BEEN SENT WAS JUST FOR THIS ACFT. PRIOR TO INSTALLATION; I XREFED THE PART NUMBERS AND THE DASH NUMBER WAS DIFFERENT. I THEN CHKED THE FORM FOR ELIGIBILITY AND IT SAID VARIOUS. THEN I CHKED THE VENDORS AUTH RELEASE CERTIFICATE FOR ELIGIBILITY AND IT SAID NOT APPLICABLE. I WAS SURE THAT THIS MODULE WAS FOR THIS ACFT BECAUSE IT HAD BEEN SENT HERE JUST FOR THIS ACFT. THE MODULE HAD NO PLACARDS SHOWING ELIGIBILITY AND LOOKED EXACTLY LIKE THE PART BEING REMOVED. I INSTALLED THE MODULE AND DID THE OPS TEST AND ALL CHKED NORMAL. AFTER RECEIVING A PHONE CALL FROM TECHNICAL SVCS SEVERAL HRS AFTER INSTALLATION AND PRIOR TO DEP; THEY SAID THAT I HAD INSTALLED THE WRONG MODULE. I INSTALLED THE CORRECT MODULE THAT WAS IN STOCK. EVERYTHING CHKED NORMAL AND THE ACFT LEFT WITHOUT ANY PROBS.