What was found
FLIGHT 5156 HAD MULTIPLE RH ENGINE FLAME OUTS WHILE ENROUTE. THE CREW WAS ABLE TO RELIGHT AND STABILIZE THE RH ENGINE/ REMOVED AND REPLACED THE RH ENGINE 6TH STAGE CHECK VALVE IAW CRJ900 AMM 36-11-03-000/400-801. PERFORMED BORESCOPE INSPECTION OF RH ENGINE COMBUSTION LINER AND STAGE 1 NOZZLE ASSEMBLY IAW CRJ 900 AMM 72-44-00-290-801 AND STAGE 1 HPT ROTOR BLADES IAW CRJ 900 AMM 72-51-01-290-804 AND GE LMM 72-00-00 INSPECTION 003 SUBTASK 72-00-00-221-004. NO DAMAGE NOTED. PERFORMED THE RH ENGINE POWER ASSURANCE CHECK IAW CRJ 900 AMM 71-00-00-720-804. ALL READINGS WITHIN LIMITS. RESULTS ATTACHED. OP CHECKS GOOD.