As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENGINE FAILED TO START. N1 ROSE TO ABOUT 12% AND THEN DECREASED. THE ALERT BOX AROUND EGT GAUGE FLASHED AND WE ABORTED THE START. GROUNDED - YES. PERFORMED B737-800 FIM 80-05 TASK 806 - FOLLOWS FIM FAULT ISOLATED DOWN TO " REPLACE HMU". FUEL PUMP & HMU REPLACED ON W/O 1901043 REF LP 60285718. ALT DEACTIVATIN PROC REVERSED. (5 MIG 51A'S REMOVED).