What was found
AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO PIT DUE TO THE FLIGHT CREW REPORTING THAT ON DEPARTURE CLIMBING THROUGH APPROX 5000 MSL RECEIVED ENGINE 1 HIGH VIBRATION - THE FLIGHT CREW REPORTED THAT THE VIB VALUES RANGED INTERMITTENTLY FROM 1.0-9.7. WITH HIGHER VIB VALUES AT IDLE THRUST AND CLIMB THRUST - THE FLIGHT CREW REPORTED THAT NO AIRFRAME VIBRATIONS FELT IN FLIGHT DECK. THE AIRCRAFT LANDED SAFELY AT PIT AND TAXIED TO THE GATE UNDER ITS OWN POWER - MAINTENANCE FOUND ACCELEROMETER CHANNEL A TO BE FAULTING AND SWITCHED IT TO CHANNEL B. (OPEN)