What was found
(CAN) AT 90 KNOTS INDICATED AND AT 11,200 GROSS WEIGHT HELICOPTER DEVELOPED AN AIRFRAME LATERAL VIBRATION. BELL HELICOPTERS RECOMMENDED REMOVAL/REPLACEMENT OF MOUNT ASSEMBLY P/N 204-031-928-009, 5TH MOUNT ASSEMBLY P/N 204-031-927-005, BOLT ASSEMBLY P/N 204-031-244-005, LINK ASSEMBLY P/N 212-030-104-005 AND FRICTION DAMPER P/N 204-031-920-003. PARTS CHANGED, COULD NOT DUPLICATE PROBLEM.