As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEVATOR TRIM TAB JAMMED AND COULD NOT BE MOVED ELECTRICALLY OR MANUALLY. FLIGHT WAS AT 41000' AND THE PITCH TRIM ANNUNCIATOR ILLUMINATED DESCENDING THROUGH 34000'. THE TRIM TAB REMAINED LOCKED IN POSITION UNTIL 19000' WERE ABLE TO MANUALLY BREAK IT LOOSE. REMOVED LT ACTUATOR, PN 6660161-13, RT ACT PN 6660161-14. INSTALLED NEW ACTUATORS IAW MM 27-32-03. COMPLETED TRIM TAB RIGGING IAW MM 27-31-00 SYS, OPS CHECKED GOOD.