What was found
AIRCRAFT WAS GROUNDED: AFTER TAKE OFF THE AIR FRAME SEEMED TO STRUGGLE TO TRIM. AT LANDING THE AIRCRAFT WAS VERY SLOW TO RESPOND DURING THE FLARE. RESULTING IN A FIRM LANDING. MAINTENANCE ACCOMPLISHED VISUAL INSPECTION OF THE ELEVATOR ASSEMBLY FOR GENERAL CONDITION, PERFORMED STABILIZER TRIM SPEED OPERATIONAL CHECK PER FIM 27-41-00 AND STABILIZER TRIM MOTOR TEST PER AMM 27-41-71. RESET SYSTEM ALL OPERATIONAL CHECKS NORMAL AND WITHIN LIMITS. NO FAULTS NOTED.