Narrow bus OEM SOPs:
SMdk.png
Next item on the workflow sheet? You've guessed it: AFTER START CHECK ... COMPLETE.
That being said, I've worked for an airline where this had become "evidence based" SOP on B737 but later lost in woodwork when A320 took over. Someone spotted the above paragraph years later and beat us all over the head with the incident report
s of bygone era. Live and learn.