As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF ON FLIGHT #3686, AFTER V1 AND #2 ENGINE EGT FLUCTUATED FROM -5 DEGREES CEL. TO APPROXIMATELY 643 DEGREES CEL. THEN TO ALL DASHES THEN BACK TO NORMAL. ALL OTHER ENGINES WERE GOOD EGT WAS STABLE FOR A WHILE THEN EGT INDICATED DASHES. MAINTENANCE REPLACED #2 ECU PN 2-303-493-06, SN/ON 9ALG716, SN/OFF 9ALG786. ALL IAW AVRO MM CHAPTER 24, ALL CHECKS GOOD AT THIS TIME.