As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT ANTI-STALL CIRCUIT BREAKER POPPED WHEN RIGHT ENGINE START SELECTOR WAS PUT IN GND . ACFT RETURNED TO THE GATE (BTB). AND MTX GROUNDED AC . MTX DEFERRED RH T/R PER MEL 78-31-1. MX PROCEDURES 78-31-1 C/W. PLACARDS INSTALLED .MBCB 10-20-25. AIRCRAFT DOWNGRADED TO CAT 3 A .MTX RETURNED AC TO SERVICE.