As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED OIL STRAIN LIGHT INDICATION IN THE RIGHT ENGINE. EMERGENCY DECLARED, RETURNED TO DFW WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED OIL STRAINER DIFFERENTIAL PRESS SWITCH. SYSTEM GROUND CHECK NORMAL OPERATION.