As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/PIT - FLT 6332 - DURING CRUISE AT 1830 HOURS ON 12-27-95, RETURNED TO IAD DUE TO THE RT ENGINE ALMOST FLAMING OUT WHEN CROSSFEED WAS SELECTED OFF. AIRCRAFT LANDED AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE RT BOOST PUMP NON-RETURN VALVE. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)