What was found
FOUND CMCF EXISTING FAULT MSG SHOWN:33-11201 CLASS 01-DOOR1 LH PRIME WELS CONTROL UNIT HAS AN INTERNAL FAULT AND 33-11401 CLASS 01-DOOR1 LH PRIME WELS CONTROL UNIT BATTERY POWER IS FAILED REF HAEC NON-ROUTINE LP:9460948 - ORIGINATED BY EMP V903179,EA 4400-01112 REV A OP001. PERFORMED BY EMP V903179,PERFORMED T/S FOUND THE CLASS 01 WBU FAILED AND REPLACED THE WBU THEN PERFORMED INSTALLATION TEST THE RESULT FOUND NORMAL REF AMM 33-51-07-02B-520A/720A-A REV 152.