What was found
AIRCRAFT WAS GROUNDED: BOTH LEFT AND RIGHT ENGINES WENT TO LOW OIL QUANTITY AND NO PRESSURE AT CRUISE. AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO TUL WHERE IT LANDED SAFELY WITHOUT FURTHER INCIDENT. **ORIGINAL REPORT WAS AALA202208196265** THE DAT FROM THE DFDR WAS DOWNLOADED AND CONFIRMED THAT THE OIL QUANTITY AND OIL PRESSURE WAS WITHIN LIMITS ON BOTH ENGINES. MAINTENANCE ACCOMPLISHED HIGH POWER ENGINE RUNS WITH NO LEAKS NOTED AND ALL INDICATIONS WERE NORMAL. SINCE THE EVENT OCCURRED ON BOTH ENGINES IT WAS SUSPECTED THAT THE ISSUE MAY BE RELATED TO THE SYSTEM DATA ACQUISITION CONCENTRATOR (SDAC). A REVIEW OF AIRMAN REVEALED THAT THE #1 SDAC HAD FAULTS ON THE LAST FLIGHT LEG. MAINTENANCE REPLACED THE #1 SDAC PER AMM 31-55-34. MAINTENANCE ALSO ACCOMPLISHED TSM 73-29-00-810-825-A AND FOUND THE #1 ENGINE ELECTRONIC CONTROL UNIT (ECU) HAD A FAULT MESSAGE AND WAS REPLACED PER AMM 73-21-60. (AALA202208234437) A SATISFACTORY OPERATIONAL CHECK AND FUNCTIONAL CHECK FLIGHT WAS ACCOMPLISHED WITH NO DEFECT BEING NOTED.