What was found
FLT 400 BOS-PHX - EMERGENCY LANDING - ON DESCENT INTO PHX GOT ENGINE 1 STALL ECAM THEN SELF CLEARED - PARAMETERS LOOKED NORMAL. AT 12000 FEET GOT THIRD STALL MESSAGE FOLLOWED BY ENGINE 1 FAIL ECAM. THIS TIME EGT WAS ABOUT 549 DEGREES WITH LEVERS AT IDLE. SHUTDOWN PER ECAM. FOUND ENGINE VSV ACTUATOR BOLT TO CRANK ROD DISCONNECTED. INSTALLED NEW BOLT, WASHER & NUT REF 75-32-42-200-010-A. COMPLIED WITH POWER ASSURANCE RUN PER CARD F5M71312. NO DEFECTS NOTED AT ENGINE RUN.