As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON SHUTTING DOWN LEFT ENGINE L AC BUS MESSAGE DISPLAYED REMAINED ILLUMINATED UNTIL EXT POWER SELECTED.(<P>PERFORMED FIM TASK 24-32 FT803 BLOCKS 1 AND 2 FOLLOWED BY ENGINE RUN IAW AMM 71-00-00. OPS NORMAL AT THIS TIME. NO FURTHER DEFECTS NOTED. NUSSIANCE FAULT DUE TO IMPROPER ENGINE SHUTDOWN WITHOUT EXT POWER ON OR APU POWER ON.</P>)