What was found
RIGHT ENGINE FLAMED OUT AFTER STALL. ACCOMPLISHED ENGINE TROUBLESHOOTING PER AMM71-00-02 WITH NO FAULTS FOUND. REPLACED MAIN ENGINE CONTROL (MEC) AND FUEL PUMP AS PRECAUTION. SHOP FINDINGS ON FUEL PUMP AND MEC FUEL PUMP BENCH TEST FOUND NO FAULTS. MEC BENCH TEST FOUND TACHOMETER SHIFTED. THIS CONDITION CAUSES VSV AND TURBINE CLEARANCE TO BE OUT OF LIMITS. THIS CAN HAVE AN EFFECT ON COMPRESSOR PERFORMANCE AND CAN CONTRIBUTE/CAUSED ENGINE SURGE, N2 ROLL BACK AND ENGINE FLAME OUT.