As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/CRW - FLT 6378 - DURING CRUISE, AT 1845 HRS ON 2-27-96, RETURNED TO IAD DUE TO CABIN DEPRESSURIZING. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE RESECURED THE LOOSE ACM DUCTING ON THE RT ACM. AIRCRAFT RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)