As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE SPAR VALVE PRECAUTIONARY REPLACEMENT REQUESTED. HISTORY OF NUMBER 2 ENGINE COMPLETE SHUTDOWN AFTER RUNNING AT IDLE FOR OVER 1 MINUTE AFTER START. GROUNDED - YES. REMOVED AND REPLACED #2 ENGINE SPAR VALVE ACTUATOR PER B737-800 AMM 28-22-11. OPS CHECK GOOD PER SAME AMM.