What was found
AFTER ITEM NR 1 RTG WITH MTX ON BOARD APU RUNNING. STRONG SMELL OF ELEC BURNING, SMELL IN COCKPIT, CABIN ON JET BRIDGE. R & R NR 1 COMMUNICATION UNIT IAW AMM 23-00-01, OPERATIONS CHECKED GOOD SEE ABOVE ITEM NR 1 OF THIS LOG PAGE FOR CORRECT ACTION.