What was found
ELEC LIGHT ON TOUCH DOWNALSO HEADING/MAP RANDOMLY ROTATED 20 DEGREES L+R WITH BRAKES SET WITH AURAL AND VISUAL WARNING FOR SPEEDBRAKE. GROUNDED - YES. REGARDING THE HEADING/MAP SLEWING LEFT/RIGHT WITH SPEEDBRAKE WARNINGS. THIS IS A KNOWN ISSUE DUE TO FMC SOFTWARE U13 THAT OCCURS AFTER LANDING WITH THE A/C BEING STATIONARY FOR SOME TIME. NO FAULTS MESSEGES NOTED ON THE OMF AT THIS TIME, REF FLEET TEAM DIGEST 737MAX-FTD-34-17003.BITE TESTED ELECTRIC PANEL, FOUND "AUX BAT CHGR INOP I" MESSEGE. PERFORMED IFIM 24-31-00-810-807,, BATTERY DISCHARGE CHECK WAS WITHIN LIMITS. BITE CHECK OF ELECTRIC PANEL SHOWS NO FAULTS. NO HISTORY 30 DAYS.