What was found
ON APPROACH, NR 2 ENG EGT 890 DEGREES, FUEL FLOW 1300 LBS & OIL PRESS & TEMP NORM. DISCONN AUTOTHROT & MOVED POWER LEVER, EGT REMAINED ABOVE 800 DEGREES FOR 4 MIN, SHUTDOWN ENG & DECLARED EMERGENCY. MX FOUND ENG 4TH STAGE VARIABLE STATOR VAIN ACT LINKAGE BRACKET BROKEN WITH BOLT MISSING. R & R NR 2 ENG IAW T/C. INVEST REPORT OF ENG, FOUND UPPER BOLT ATTACH 4TH STAGE VSV BRACKET IN UNISON RING & MATING DOWEL MISSING, OTHER BOLT STILL IN PLACE. VSV ACT LOADS APPLIED TO BRACKET CAUSED IT TO BEND & CRACK. BOLT MAY HAVE WORKED LOOSE DUE TO DAMAGED HELICOIL. TORQUE CHECK PERFORMED ON HELICOILS, HELICOIL THAT HAD MISSING BOLT HAD TORQUE OF LESS THAN 1 FT LB PER INCH, WHILE OTHER HAD TORQUE OF 2 FT LBS PER INCH.