What was found
AFTER ENGINE START, THE LEFT ENGINE EGT CONTINUED TO RISE TO 810 DEGREES, THEN ENGINE FLAMED OUT. N1, N2, & N3 DECREASED TO 0. FUEL LEVER WAS PLACED TO CUTOFF, GROUND CREW ADVISED FLAMES COMING FROM EXHAUST AND WENT OUT BY ITSELF. FOUND A BAD BVCU, R & R BVCU IAW AMM 75-32-01. ALSO SUSPECT FFG, REMOVED AND REPLACED THE NR 1 FFG IAW AMM 73-21-01, LEAK CHECKED GOOD. PERFORMED TESTS 1, 3, 2, 9, 10, 11, & 13 IAW MM 71-00-00, ALL CHECKED GOOD. PERFORMED BORESCOPE INSPECTION ON THE NR 2 ENGINE IAW FIM 71-05-00-815-823-R00, HOT SECTION (HPT,IPT,LPT AND COMBUSTION CHAMBER) IAW AMM 72-00-00. NO DAMAGE FOUND.