As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT OF KATL EN ROUTE TO KCLE, THE LT ENGINE N1 VIBES WENT 2.0 MILS WHICH IS IN THE AMBER RANGE. THE FLIGHT CREW COMPLETED THE QRH AND CONFERRED WITH MAINTENANCE CONTROL BY ACARS. DUE TO A LACK OF MAINTENANCE FACILITIES IN KCLE THE CREW WAS ADVISED TO RETURN TO KATL. AN OTHERWISE NORMAL APPROACH AND LANDING WAS MADE AT KATL. MAINTENANCE INSPECTED THE ENGINE AND LUBRICATED THE FAN BLADES. A SUBSEQUENT ENGINE RUN SHOWED NORMAL VIBRATION AND THE AIRCRAFT WAS RELEASED FOR SERVICE.