As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED QUICK DRAIN VALVE (OIL) ON NEW AIRCRAFT/ ENGINE. AIRCRAFT FLEW APPROX 1 HR , INITIAL FLIGHT TEST. VERY MINUTE OIL LEAK WAS NOTED FROM OIL QUICK DRAIN VALVE. REMOVED VALVE TO FIND VALVE SNAP RING IN OIL DRAINED FROM ENGINE, ALSO FOUND O-RING SPLIT. NOTE: NO DAMAGE TO ENGINE OCCURRED. (K)