As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6343 - IAD-SYR - DURING CRUISE, RETURNED TO IAD DUE TO THE LEFT AIR OFF LIGHT ILLUMINATING. AIRCRAFT RETURNED TO IAD WITH NO FURTHER INCIDENTS. MAINTENANCE REPLACED THE LEFT AIR OFF SWITCH. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)