What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO AUS DUE TO THE FLIGHT CREW REPORTING THAT POSITION 1 ENGINE HAD VIBRATIONS AND STALLED AFTER LEVELING AT CRUISE -THE FLIGHT CREW REPORTED THAT THE ENGINE WAS STUCK AROUND 50% N1 AND WAS OSCILLATING IN POWER THE FLIGHT CREW WAS ABLE TO KEEP ENGINE AT IDLE POWER AND FOR LANDING AT AUS- THE AIRCRAFT LANDED SAFELY AND TAXIED TO THE GATE UNDER ITS OWN POWER - MAINTENANCE FOUND DAMAGE TO THE HPC STAGE 4 AND STAGE 5 BLADES - (OPEN)