What was found
DURING INITIAL CLIMB APPROXIMATELY 3 MINUTES AFTER TAKEOFF THE CREW REPORTED A LT YAW MOVEMENT AND RECOGNIZED LT ENGINE MAP INDICATION DROPPING FOLLOWED BY A RAPIDLY DECREASING LT ENGINE OIL PRESSURE INDICATION. THE CREW ALSO REPORTED WHITE SMOKE STREAMING FROM LT NACELLE. THE ENGINE WAS INTENTIONALLY SHUT DOWN/SECURED AND THE AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. THE OUTBOARD PORTION (APPROXIMATELY 40%) OF THE LT ENGINE OIL FILTER ADAPTER FLANGE WAS FOUND TO BE BROKEN FREE OF OIL FILTER ADAPTER ASSEMBLY. THE DAMAGED ADAPTER ASSEMBLY WAS DETERMINED TO BE THE CAUSE OF THE OIL LEAK. THE ENGINE HAS BEEN REMOVED FOR REPAIR AND EVALUATION.