What was found
SHORT FINAL TOO LOW GEAR AND PULL UP MSGS. GEAR AND FLAPS WERE P ROPERLY COFIGURED FOR LANDING. CHECKED PIN B9 ON D1153B (GEAR POSITION DISCRETE) WHILE CYCLING PART INFO ENTRY. INSTALLED GPWS COMPUTER AND COULD NOT LOAD SOFTWARE PART IS BAD GEAR HANDLE. NO DEFECTS NOTED. SUSPECT GPWS COMPUTER. FROM STOCK. INSTALLED OLD BOX, NIS GPWS COMPUTER. REMOVED AND REPLACED GROUND PROX WARNING COMPUTER (GPWC) IAW AMM 34-49-01/401. LOADED OPC, RDC AND CURRENT TDB SOFTWARE. NO CURRENT FAULTS, OK TO COMTINUE. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1950152 SN OFF 2373 IPC REFERENCE # 34-49-01-01