As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT ABOVE 10K FT, THE BARBER POLE REMAINED APPROX 267 KNOTS EVEN THROUGH 20K FT CLIMBING. NO ANNUCIATIONS, NO STATUS MESSAGES AND NO OTHER ABNORMAL INDICATIONS. A/C RETURNED TO FIELD AND RETURNED TO GATE MTX GROUNDED AC . AC IS CURRENTLY AOG AND BEING WORKED IN SJO WAITING FOR PARTS AND TOOLING . WILL AMEND WHEN BACK IN SERVICE.