As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAINS SIDE PILOTS 'ROLL' LIGHT ILLUMINATED WITH ASSOCIATED ADVISORY MESSAGE ON ED2 ON ARRIVING IN GATE. MESSAGE CLEARED WITH SECU BITE TEST. PERFORMED SYSTEM TEST AND FOUND INTERNAL SECU (SPOILER ELECT CONTROL UNIT) FAILURE. REPLACED NR 1 SECU IAW AMM. OPS CHECK GOOD. (M)