As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN DEN, AIRCRAFT RETURNED TO BLOCK DUE TO NR 1 ELEVATOR AILERON COMPUTER PITCH FAULT DURING FLIGHT CONTROL CHECK. MAINTENANCE REMOVED AND REPLACED THE LEFT OUTBOARD ELEVATOR SERVO (BLUE SYSTEM, POSITION 34CE3) AND MADE ADJUSTMENTS PER AMM 27-34-51-000-001, 27-34-51-400-001 AND 27-34-00-820-002. MAINTENANCE PERFORMED SATISFACTORY OPERATIONAL AND LEAK TEST.