What was found
NR 1 ENGINE EGT AT LIMIT ON START, RUNS 40-100 DEGREES ABOVE NR 2 DEPENDING ON FLT CONDITION. SECURED ENGINE AT 400 DEGREE BOROSCOPE FOUND NR 1 ENGINE T-1 DAMAGE BEYOND LIMITS. REMOVED AND REPLACED NR 1 ENGINE TEARDOWN FOUND FORWARD OCC CASE RETAINING BOLT SHEARED HEAD AS CAUSE OF T-1 BLADE FRACTURE. BOLT IS P/N 772568QQ. LEAK AND OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (M)