What was found
AT FL300 IN SMOOTH AIR EN ROUTE FROM CLT TO MOB, CREW REPORTED NOSE OF AIRCRAFT NOSED OVER APPROXIMATELY TWO (2) TO THREE (3) DEGREES. THIS WAS REPEATED NOSE UP AND NOSE DOWN, WITH A JERKING MOTION, FOR A COUPLE OF MINUTES. SHORTLY AFTER, CREW RECEIVED A FLAPS DEGRADED STATUS MESSAGE. CREW DIVERTED TO MGM. FLAPS OPERATED NORMALLY WHEN SELECTED FOR LANDING AND AIRCRAFT LANDED IN MGM WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT FLAP SYSTEM, REMOVED AND REPLACED LEFT FPTU (FLAP POSITION TRANSMITTER UNIT) AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS. AIRCRAFT RELEASED FOR SERVICE.