What was found
F/A REPORTED VIBRATION IN BOTH FRONT AND REAR OF CABIN. FELT SLIGHT VIBRATION IN YOKE. SEEMED TO LESSEN AS AN INCREASED ON APP WITH GEAR AND FLAPS DEPLOYED-SEEMED SMOOTHER. PERFORMED GROUND RUNS OF ENGINES, NO PROPS VIBRATIONS EXPERIENCED. PERFORMED INSPECTION OF ENTIRE EXTERNAL AIRFRAME INCLUDING FLIGHT CONTROLS, FLAPS, FAIRINGS AND GEAR DOORS. NO ABNORMALITIES FOUND. REQUEST FCF (FCF FAILED). AWAITING FOR AML PAGE FOR FURTHER DETAILS.