As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6207 - IAD-MHT - DURING CLIMB-OUT, RETURNED TO IAD DUE TO THE CAPTAIN COULD NOT CLOSE RIGHT OIL COOLER DOOR, AND ENGINE COULD NOT MAINTAIN MINIMUM TEMPERATURE WITH INCREASED ALTITUDE. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE RIGHT OIL COOLER ACTUATOR. (M)