As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKING OFF FOR FIRST FLIGHT OF THE DAY, AIRCRAFT HAD NO AIRSPEED ON INDICATOR. MAINTENANCE FOUND PLUG MISSING ON CAP ASSEMBLY FOR THE PITOT DRAIN SYSTEM. INSTALLED NEW PLUG IN CAP ALL WORK DONE IAW MM, COMPLIED WITH PITOT SYSTEM CHECK NO DEFECTS NOTED.