What was found
PDIS 907 21-01 2476713 17FEB22 CHA CLOSE BURNING SMELL NOTED ON FLT DECK SHORTLY FOLLOWED BY AUTOPILOT FAIL ON EICAS
FACT 18FEB22 14:12 CHA CHECKED CMC MESSAGES NO RELAVENT MSGS REGUARDING A/C. PERFORMED PRE FLIGHT OPS CHECK OF A/P, NO DISCREPANCES FOUND WITH A/P OPS CHECK THIS TIME