What was found
AIRCRAFT EN ROUTE FROM BIH TO VCV WHEN BOTH ENGINES QUIT AT 16,000FT. AFTER DESCENDING 2,000FT PILOT WAS ABLE TO GET BOTH ENGINES RUNNING AGAIN AND THEN RETURNED TO BIH. MAINTENANCE CHECKED FUEL, FUEL WAS OK. RAN AIRCRAFT, NO PROBLEMS NOTED. FLIGHT DEPT THINKS PILOT HAD MIXTURES TOO RICH FOR THAT ALTITUDE.