As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6377 - IAD-CRW - DURING CRUISE, UNSCHEDULED LANDING AT IAD DUE TO OUTER CABIN WINDOW (6BC) CRACKED. AIRCRAFT WAS DEPRESSURIZED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND REMOVED AND REPLACED OUTER CABIN WINDOW, OPS CHECK OK. AIRCRAFT WAS APPROVED AND RELEASED FOR RETURN TO SERVICE. (M)