B737 Next Generation Undifferentiated
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Engineer; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 190; Flight Crew Total 20000; Flight Crew Type 15000
Situational Awareness
Aircraft Equipment Problem Less Severe
Aircraft Equipment Problem Dissipated; Flight Crew Overcame Equipment Problem; Flight Crew Regained Aircraft Control
Aircraft
After landing and clearing [the] runway; we momentarily stopped awaiting ATC instructions for taxi to the gate. When ready to proceed; throttles were advanced but both engines were unresponsive. Both engines were stuck at 20.2% N1; idle. Throttles were moved several times both together and individually with no engine response. Both reverser and both engine control lights on the aft overhead engine panel were illuminated. Both EECS were manually selected to ALTN and when throttles were again moved; the engines responded. Total time from stopping the aircraft to regaining engine control was probably less than 60 seconds. The manual selection on ALTN and the regaining of throttle response may have been purely coincidental as it was discovered later by maintenance that that there were 6 thrust reverser 'stow' faults. It appears that the cause was a bad Engine Accessory Unit (EAU).
B737 Captain reported that after landing both engines were unresponsive to throttle input.