What was found
ENG NR 1 STALL ON POWER REDUCTION DESCENDING OUT OF FL 380, 1 SECONDS THUD HEARD AND STALL ECAM FOR 5 SECONDS. THEN ALL INDICATIONS NORMAL. [SUP 05-18-07] INITIALLY ATTRIBUTED TO POSSIBLE 7TH OR 10TH STAGE BLEED VALVE SOLENOID FAILURE. DID FIND THAT 7TH STAGE VALVE SOLENOID WAS NOT CLOSING CORRECTLY AND WAS REPLACED. HOWEVER AFTER SIMILAR EVENT OCCURRED ON FLIGHT 472 APRIL 8TH, FURTHER INVESTIGATION CORRECTLY DETERMINED THAT THE ROOT CAUSE OF THE CONDITION WAS A FAULTY VARIABLE STATOR VANE ACTUATOR.