What was found
AFTER BEING AT ALTITUDE FOR APPROXIMATELY 45 MINS THE ELECTRIC AND MANUAL PITCH TRIM FROZE UP, IT BROKE FREE WHILE DESCENDING THROUGH THE LOW 20'S. SUP: R &R LT AND RT ELEVATOR TRIM TAB ACTUATORS WITH O/H UNITS IAW THE MM CH 27-32-04 RIG, TRAVEL AND OPS CHECKS ARE GOOD. REMOVED PART ACTUATOR ASSY LT (PN: 6660161-20, SN: 7044737LH) TOTAL HRS 222.6, CYCLES 170.