As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: OIL FILTER BYPASS LIGHT FOR LEFT ENGINE CAME ON IN FLIGHT FOLLOWED PROCEDURE FOR ENGINE SHUT DOWN; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT CVG. REPLACED OIL STRAINER CLOG LIGHT INDICATOR. PER 79-21-10.