As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI OUT TO RUNWAY, OIL PRESSURE WARNING LIGHT ILLUMINATED FOLLOWED BY OIL AURAL WARNING ON LEFT ENGINE. SHUT DOWN LEFT ENGINE IMMEDIATELY. OIL PRESSURE FELL BELOW 40 PSI D FOR LESS THAN 5 SECONDS. REASON FOR LOW OIL PRESSURE ON LEFT ENGINE WAS OIL CAP INADVERTENTLY LEFT OFF AFTER OIL SERVICE.