What was found
DURING CLIMB AT FLIGHT LEVEL 320 STRONG HARMONICS VIBRATION WAS FELT ON THE ENTIRE ACFT. IAW AMM 27-34-00-200-001A & 27-24-00-200-002A, ELEVATOR & RUDDER, THE TOO MUCH PLAY CHECK OF THE BEARING & HINGES WERE PERFORMED. REQUIRE REPLACE ELEVATOR SERVO CONTROL GREEN SYS LT ELEVATOR. IAW AMM 27-34-51-000-001A THE GREEN ELEVATOR SERVO CONTROL 34CE1 WAS REMOVED, IAW AMM 27-34-51-400-001A WAS INSTALLED & IAW AMM 27-34-00-820-002A ADJUSTMENT OF THE ELEVATOR & HYD ACTUATION. AFTER REMOVAL & INSTALLATION OF ONE SERVO CONTROL, PERFORMED TEST SATISFACTORY, PN 31075-440, SN OFF 4941 & SN ON 14459.