As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 688 DCA-BOS, A/C DIVERTED TO IAD DUE TO STRONG SMELL OF FUMES IN CABIN ON TAKEOFF. PERFORMED FIM TASK 21-20-00-810-801-A FOR SMOKE SMELL IN THE CABIN / COCKPIT. PACK 2 FAILED DURING OPS CHECK GENERATING REPORTED SMOKE / SMELL. PACK 2 FAIL CAUTION MESSAGE W/ PACK 2 OFF ADVISORY MESSAGE DISPLAYED ON EICAS. CMC FAULT CODE 21516700AM2 CONFIRMS ACM NR 2 FAILURE. REMOVED AND REPLACED NR 2 PACK ACM. OPS CHECK GOOD.