As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6278 - CMH-IAD - DURING CRUISE HAD A COMPLETE LOSS OF HYDRAULIC PRESSURE ON LEFT ENGINE FIRST, THEN RT PRESSURE FAILED. AIRCRAFT RETURNED TO CMH WITH NO FURTHER INCIDENT. MAINTENANCE REPLACED BOTH HYDRAULIC PUMPS. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (W)