What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED COMMING INTO ORD. IN LEVEL CRUISE AT FL 370 ENGINE 1 AND ENGINE 2 STALL. OAT -64C, CLEAN AIR. FLIGHT CREW FOLLOWED QRH AND ECAM PROCEDURE, DESCENDED TO FL 270 AND ENGINE PARAMETERS RETURNED TO NORMAL. THE AIRCRAFT LANDED SAFELY AT ORD AND TAXIED TO THE GATE UNDER ITS OWN POWER. NOTE: SEE AALA202401180715 FOR #2 ENGINE. **SUPPLEMENTAL REPORT FOR AALA202401184376: ENGINEERING AND GE REVIEWED THE FDR DATA AND CONCLUDED THAT BOTH ENGINES HAD EXPERIENCED A BETA STALL. N1 DROPPED APPOXIMATLEY 30% ON BOTH ENGINES SIMULTANEOUSLY WHICH WAS LIKELY THE CAUSE OF THE STALL. SINCE BOTH ENGINES ARE HIGH TIME AND LOW PERFORMING IT WAS RECOMMENDED TO REPLACED BOTH ENGINES. MAINTENANCE REPLACED THE #1 ENGINE PER TASK CARD 26L40071001A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED. ** (CLOSED)