As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MDIS 627 21-01 1898121 27OCT19 PHL CLOSE STRONG BURNING ODOR IN FLT COMPARTMENT DURING FLIGHT , NO ABNORMAL INDICATIONS OR EICAS MSGS FACT 27OCT19 16:50 PHL RAN #1 PACK WITH APU BLEED AND ENG 1 BLEED AIR. NO B URNING SMELL IN COCKPIT AND NO RELATED CMC MESSAGES. A/C GOOF FOR SERVICE