As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING CONTROL WHEEL SURFACE CHECKS, LEFT O/B AILERON SHOWED NO MOVEMENT ON LOWER EICAS SCREEN. SWAPPED RT & LT STAB TRIM/AILERON LOCKOUT MODULES FOR TROUBLESHOOTING. CHECKS GOOD PER FIM 27-09-00, NO HELP. SWAPPED BACK, BOTH CHECK GOOD. TRANSFERRED LT OUTBOARD AILERON POSITION INDICATION PER MEL 27-08-09 CAT. C, CONTROL NUMBER 1021 DROP DEAD DATE 08-11-10. PREFLIGHT CONTROL CHECK PERFORMED PER MEL 27-08-1 (REQUIRED INSPECTION EACH FLIGHT).