What was found
DURING CRUISE FLIGHT AT FL390, A RAT UNLOCKED EICAS MESSAGE AND RAT UNLOCKED LIGHT IN RAT SWITCH ILLUMINATED. FIVE MINUTES LATER BOTH WARNINGS WERE NO LONGER DISPLAYED. NO RAT UNLOCKED MESSAGE AT BLOCK IN. DEPLOYED RAT IAW AMM 29-21-00-2 AND RECEIVED A RAT UNLOCKED MESSAGE.USING FRM FAULT CODE 29-21-14-00 AND AMM 29-21-17, INSPECTED STOWED LIMIT SWITCH. NO DEFECTS NOTED WITH SWITCH S10258. FOUND ASSOCIATED CONNECTOR UNSECURE. REMOVED, CLEANED, AND SECURED THE CONNECTOR IAW SWPM 20-60-00. STOWED THE RAT IAW AMM 29-21-00-2 AND RAT UNLOCKED INDICATION RETURNED TO NORMAL.