What was found
(CAN) THE AIRCRAFT WAS FERRYING BACK TO BASE. IN CRUISE THE FLT MECHANIC WHILE STANDING AT THE BACK BETWEEN THE GALLEY AND THE WASHROOM FELT A LOW FREQ VIBRATION ON THE FLOOR. THE VIBRATION WAS NOTICEABLE TO THE FLIGHT ATTENDANT ALSO. THE INFORMATION WAS RELAYED TO THE CREW. THE CREW SLOWED THE AIRCRAFT DOWN & BEGAN TO LOOK FOR AN ALTERNATE AIRPORT. THE AIRCRAFT LANDED UNEVENTFULLY. THE INSPECTION REVEALED THAT THE RIGHT OUTBOARD DEICE BOOT ON THE HORIZONTAL UPPER PART A PIECE ABOUT 1.5 FEET HAD COME UNGLUED. THE BOOT WAS REGLUED AND THE DEICING SYSTEM WAS TESTED. THE AIRCRAFT WAS RELEASED TO SERVICE AND IT FLEW BACK TO BASE.