What was found
DURING CRUISE FROM IND-DFW, AT APPROXIMATELY 31,000 FEET THE CREW RECEIVED A RIGHT THRUST REVERSER UNLOCK CAUTION MESSAGE. QRH PROCEDURES WERE COMPLIED WITH, AN EMERGENCY DECLARED AND THE AIRCRAFT DIVERTED INTO LIT, LANDING SAFELY. MX DEFERRED THE RIGHT THRUST REVERSER ON 12/3/2003 UNDER MEL NR 78-30-01, AND CLEARED THE DEFERRAL ON 12/5/2003 BY REMOVING AND REPLACING THE POWER DRIVE UNIT ON THE RIGHT THRUST REVERSER. OPS CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)