What was found
SPOILERS EICAS MESSAGE AND DISCRETE LIGHT ON WHILE DOING FLIGHT CONTROL CHECK. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANNCE TROUBLESHOT. FOUND "HYD PRESS SW FAULT BALL DISPLAYED ON STAB TRIM AILERON LOCK ASY. IN MODULE AND 1 MODULE FAULT BALL ON SPOILER CONTROL MODULE RESET, MESSAGE CLEARED. OPS CHECK SPOILER NO FAULTS DIPSLAYED REF B767 AMM 31-41-00 27-41-00. AIRCRAFT RETURNED TO SERVICE