As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE TAKEOFF ROLL BEFORE 80 KNOTS BOTH RED MASTER WARNING LIGHTS CAME ON WITH NO OTHER ASSOCIATED LIGHTS. PERFORMED FUNCTIONAL TEST OF MASTER WARNING SYSYTEM IAW HAWKER 800XP MM. 31-50-00. FUNCTIONAL CHECKS NORMAL NO DEFECTS NOTED.