What was found
AIRCRAFT WAS GROUNDED: REF MIC 7559698 - OIL FILTER BYPASS LIGHT AT FL380 FOLLOWED QRH DID AN ENGINE SHUT DOWN AROUND FL320 OIL TEMP WAS RISING RAPIDLY MAX TEMPERATURE NOTED ON OIL TEMP WAS 130. SET WAS 32 MIN 29 SEC. OIL PRESS JUST PRIORTO S/D WAS 39 PSI, AND OIL QTY WAS 13.5 QT. OIL TEMP WAS 266 DEG F. (LT ENG WAS 215 DEG F.) DECESION MADE TO SHUTDOWN ENGINE AND RETURN TO DFW. EMERGENCY DECLARED AND AIRCRAFT LANDED WITHOUT INCIDENT. REPLACED NR 2 ENGINE IAW WC 08L40072003. ALL OPS AND LEAK CHECKS GOOD. OK FOR SERVICE.