As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB-OUT FROM KBDL, THE CREW HEARD LOUD NOISE OF AIR FROM CAPT'S SIDE. THE CREW RETURNED TO KBDL WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND EMERGENCY ACCESS PANEL TO CAPT CLEARVIEW WINDOW HAD COME OUT AND FELL DOWN INTO FUSELAGE. MAINTENANCE REINSTALLED PANEL IAW DACO DC8 MAINTENANCE MANUAL 6-11-1.