What was found
AFTER PARKING, GROUND POWER DROPPED AND STARTED APU. AFTER APU START, WE RECEIVED A RUBBERY, SWEET AND ELECTRICAL SMELL IN COCKPIT. C/W AMDS 0550-2002. R&R GAPCU REF A321 AMM 24-41-34. ALL OPS CK'S NORMAL. NO FAULTS NOTED. C/W AMDS W/C 0550-9001-A320FAM. NOTIFIED MCC. OK FOR SVC. PART CHANGE INITIATED ON CLOSED LOG ON 13DEC2022 @09:22 UTC CONTROL UNIT, G OFF 33-2441-9-0001 08724 ON 33-2441-9-0001 09700. (LP# 9614289)