What was found
FLT 6312 - IAD-JFK - DURING CRUISE, AIRCRAFT MADE AN UNSCHEDULED LANDING AT IAD DUE TO LEFT ENGINE EGT WENT TO ZERO AND THEN FLUCTUATED BETWEEN ZERO AND 200 DEGREES. MAINTENANCE INSPECTED AND FOUNDED BROKEN WIRE AND SHIELDING AT ZONE 2 CONNECTOR. MAINTENACNE REPAIRED BROKEN WIRE AND SHIELDING, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)