What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS 1:44 INTO FLIGHT @ FL 380 RECIEVED RA AT 380 INDICATED ON ND AT AIRCRAFT NOSE, CLIMBED 500/ BOTH CA AND FO ND BLANKED. UPPER DU DISPLAYED N1 AND EGT, NO FF OR QTY ON LOWER DU ONLY N2 DISPLAYED OTHERWISE DUS WERE BLANK NR 1 TSPONDER -SWITCHED TO NR 2 - TA ONLY DESCENDED TO 280 - WAS VMC NO TARGETS SEEN - CONTINUED - ATC REPORTED NO AIRCRAFT IN OUR AREA. MAINTENANCE PERFORMED DCS REVIEW, FAULTED CODE 31-60041 DEU-1 SOFTWARE RESET. ACCOMPLISHED FIM 31-62-00-810-809. REMOVED AND REPLACED NR 1 DEU AND ALL REQUIRED TEST CHECKS GOOD. SEE SDR'S AALA201905099026 & AALA201905099027.