What was found
DURING DESCENT INTO DFW FROM LBB, AT APPROXIMATELY 27,000 FEET A LEFT ENGINE REVERSER UNLOCK MESSAGE WAS RECEIVED. THE QRH WAS COMPLIED WITH AND AN EMERGENYC WAS DECLARED. NO UNUSUAL DESCENTS OR APPROACH SPEEDS WERE NECESSARY. THE AIRCRAFT LANDED SAFELY IN DFW. AFTER ENGIEN INSPECTION BY FIRE SERVICE PERSONNEL, THE AIRCRAFT TAXIED SAFELY TO THE GATE. MAINTENANCE REMOVED AND REPLACED A RELAY INSIDE JUNCTION BOX THREE AND THE POWER DRIVE UNIT. OPS CHECKS GOOD. AIRCRAFT OK FOR SERVICE. (M)