What was found
ABORTED TAKEOFF AND RETURNED TO RAMP DUE TO ENGINE NR 1 EXCEEDING MAX EGT LIMITS WHEN APPLYING TAKEOFF THRUST. EGT REACHED 976 DEGREES FOR APPROXIMATELY 5 SECONDS. PERFORMED OVERTEMP INSPECTION REQUIRED BY 71-00-00 AREA C. BORESCOPE PER 72-00-00, NO DEFECTS NOTED, 80 HOUR LIMIT ENGINE CHANGED 12/17/96. SUSPECT 8TH STAGE CHECK VALVE OR HIGH STAGE VALVE FAILURE CAUSING EXCESSIVE BLEED AIR DURING TAKEOFF.