As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 589, WHEN THRUST LEVERS ADVANCED FOR TAKEOFF, TAKEOFF WARNING HORN ACTIVATED. FLAPS 15 SPEED BRAKES STOWED TRIM SET AT 6.6. FOUND UPPER STAB. TRIM SWITCH (S532) RETURN MECHANISM BROKEN. R&R SWITCH IAW MM 31-26-24 & WDM 27-43-01. TESTED TAKE-OFF WARNING IAW MM 31-26-0. OPS CHECKS GOOD. AIRCRAFT WAS GROUNDED.