As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD/BOS - FLT 6418 - DURING CRUISE AT 1345 HRS ON 9-9-96, LANDED AT BOS WITH ONE DISCREPANCY WHICH WAS LT ENGINE OUTBOARD NACA DUCT MISSING IN-FLIGHT. MAINTENANCE REPLACED DUCT, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)