As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD/AVP - FLT 7826 - DURING CLIMB AT 0850 HRS ON 4-24-99, AIRCRAFT RETURNED TO ORD DUE TO NR 2 ENGINE N2 INDICATING DROPPED OFF-LINE. MAINTENANCE CLEANED CANNON PLUGS TO RT ENGINE N2 SPEED SENSING ALTERNATOR AND CONTROL. AMPLIFIER OPS CHECK GOOD. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)