As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED BRAKES ALTN L(R) RELEASED MESSAGE DISPLAYED ON GEAR EXTENSION. FLIGHT CREW WENT AROUND AND RAN SUPPLEMENTAL PROCEDURES. MAINTENANCE ACCOMPLISHED TROUBLESHOOTING PROCEDURES PER TSM 32-43-00-810-825-A FAILURE OF THE ALTERNATE BRAKE SERVO VALVE AND FOUND FAULTY MANIFOLD ALTERNATE BRAKE RIGHT 2852GM, REPLACED MANIFOLD AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 32-43-32 WITH NO FURTHER DEFECTS NOTED,