What was found
IN FLIGHT LOST MOSTNAV AND ATTITUDE INFOON CA PFD AND ND ANDENG 1 EPR/EGT/N1/N2/FF TECH SUPPORT UPDATE: DMC 1 FAULTS NOTED IN AVIATAR, ADDING DMC-1 (1WT1) TO PARTS FOR REPLACEMENT REF AMM. 31-63-34. REF 31-63-81-810-867-A REMOVED AND REPLACED #1 DMC 1WT1 REF MM 31-63-34 PERFORMED EIS TEST AND LAND TEST REF MM 22-97-00 NO FAULTS TEST PASSED, ACFT FULL CAPABILITY.PARTS USED: 31-3161-9-0005,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1711207 SN OFF 2570 COMPUTER, DISPL OFF 31-3161-9-0005 2570 ON 31-3161-9-0005 2048 AS PRECAUTION PREFORMED #1 ENG IDLE RUN REF AMM 71-00-00. NO FAULTS NOTED AT THIS TIME. OK FOR SERVICE.