What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED THAT DURING DESCENT AT FL 340 TO FL300 IN OPEN DECENT GOT ECAM ENGINE 2 VANE STALL WHICH WENT AWAY APPROXIMATELY 30 SECONDS, THEN GOT ENGINE 2 STALL ECAM WHICH WENT AWAY APPROXIMATELY 5-10 SECONDS, WENT TO MANAGED DESCENT AND NORMAL PARAMETERS FROM THERE ON. MAINTENANCE FOUND THE #2 ENGINE VARIABLE BLEED VALVE SENSOR OUT OF RIG AND ADJUSTED IT PER AMM 75-31-70. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED,