What was found
PHL - FLT 1063 - EN ROUTE FROM RIC TO BOS, THE STABILIZER ELECTRIC TRIM HAD FAILED. FLIGHT DIVERTED TO PHL AND LANDED WITHOUT FURTEHR INCDIENT. NO EMEGENCY WAS DECLARED. MAINTENANCE PERFORMED FUNCTIONAL CHECK ON STABILIZER TRIM SYSTEM AND FOUND ALL FUNCTIONS NORMAL. REMOVED AND REPLACED THE STABILIZER TRIM ACTUATOR ASSY AS PRECAUTIONARY AND PERFORMED OPERATIONAL CHECK PER MM 27-41-71. ALSO, REMOVED AND REPLACED STABILIZER TRIM SAFETY RELAY R66 AND STABILIZER CONTROL RELAY R64 (P/N 9123-8071) AS PRECAUTIONARY. SYSTEM CHECKS NORMAL. VISUALLY INSPECTED STABILIZER JACKSCREW AND GIMBAL AND MOUNTING OF CUTOFF SWITCHES. NO DEFECTS NOTED. (M)