As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/BOS - FLT 6506 - DURING CRUISE AT 1100 HRS ON 9-4-96, LANDED AT BOS WITH ONE DISCREPANCY WHICH WAS THE NR 2 AHRS FAILED IN-FLIGHT. MAINTENANCE REMOVED AND REPLACED NR 2 AHRS UNIT. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)