What was found
DISPLAY SOURCE 1 FAILURE LIGHT ILLUMINATED ON BOTH PFDS SPD LIM LIGHT ILLUMINATED CAPT PFD HYDRAULIC A PRESSURE DATA FIELD MISSING ENG LIGHT ILLUMINATED ON RECALL BUT EXTINGUISHED WHEN MASTER CAUTION LIGHT IS PRESSED. EEC BOTH REVERTED TO ALTN MODE. GROUNDED - YES. DIVERSION TIME 57 MINUTES. FOUND #1 DEU WOULD NOT TEST. REPLACED #1 DEU PER B737-800 AMM 31-62-21/401. INSTALLED OPC PER AMM TASK 31-62-21-470-802. HAD CDS FAULT. #2 DEU NOT TESTING. RE-RACKED #2 DEU. FAULT CLEARED. ACCOMPLISHED LLM TEST LRU TESTS PER B737-800 FIM 22-11 TASK 802. NO FAULTS NOTED. CDS TEST GOOD FOR #1, #2 CDS PER AMM TASK 31-62-00-710-801. ALL GROUND VERIFICATION TESTS FOR CDS PASS. NO HISTORY LAST 90 DAYS.