As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 4138 - CREW ELECTED TO RETURN TO GATE WHEN CAPTAIN WAS UNABLE TO ADVANCE RT POWER LEVEL BEYOND THE F.I. GATE. MAINTENANCE LUBRICATED PRIMARY LOW PITCH LOCK-OUT DEVICE IAW STD MAINTENANCE PRACTICES. GROUND CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.