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: AFTER TAKEOFF THROUGH APPROXIMATELY 3000FT, GOT NUMBER 1 ENGINE OIL FILTER BYPASS. HAD TO REDUCED THRUST TO IDLE BEFORE LIGHT EXTINGUISHED. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DFW. ACCOMPLISHED FIM TASK 79-05-00-810-817-F00. CHIP DETECTORS CHECKED CLEAR AND FILTER CHECKED CLEAR. REMOVED AND REPLACED DIFFERENTIAL PRESSURE SWITCH. PER AMM 79-21-07. LEAK AND OPERATIONAL CHECK GOOD.