What was found
AFTER ENGINES START FOR FLIGHT TA382 FROM BOG TO SAL, THE AIRCRAFT HAD A FAILURE MESSAGE ABOUT FLIGHT CONTROLS AND RETURNED TO THE GATE FOR MAINTENANCE. THE PILOT REPORTED THE FOLLOWING TWO ITEMS: 1) "SPOILER FAULT AFTER ENGINE START"; 2) "FLIGHT CONTROL NO DISPATCH AFTER ENGINE START". PERFORMED FAULT ANALYSIS IN ACCORDANCE WITH FIM 27-03-00-810-84E-A, REPLACED THE MFS PCU #4 LH IN ACCORDANCE WITH AMM 27-65-01-000/400-801-A, PERFORMED ELECTRICAL RIGGING AS PER AMM TASK 27-65-01-820-801-A AND RETURN TO SERVICE TEST AS PER AMM 27-00-00-070-801-A. PERFORMED SPOILER OPERATIONAL TEST AS PER AMM 27-60-00-710-801-A WITH NORMAL RESULT. THEN THE AIRCRAFT WAS RETURNED TO SERVICE.