As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6373 - SYN-IAD - DURING CLIMB, MADE AN UNSCHEDULED LANDING BACK TO SYN, DUE TO OIL COOLER CAPTION ILLUMINATED. MAINTENANCE RESECURED CANNON PLUG ON OIL COOLER, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)