As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6392 - IAD-BOS - DURING TAXI, AIRCRAFT RETURNED TO GATE DUE TO DUCT OVERTEMP WARNING LIGHT ILLUMINATED. MAINTENANCE INSPECTED AND OPENED DMI 46505, MEL 21-1 ON RT PACK. MAINTENANCE CLOSED DMI 46505 ON 3-14-98 BY REMOVING AND REPLACING RT ACM. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)