As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKE-OFF FROM SAT, CREW NOTICED POWER BRAKE FAIL AND POWER BRAKE PRESS LOW ANNUNCIATORS. CREW PERFORMED AFM PROCEDURE CHECKS FOR THIS INDICATION WITH NO EFFECT. CREW DECLARED AN EMERGENCY AND RETURNED TO SAT FOR INSPECTION AND REPAIR OF FAULT.MAINTENANCE FACILITY FOUND FAULT TO BE WITH NOSE LANDING GEAR ACTUATOR, AFTER REPLACEMENT ANTISKID SYSTEM WORKED SATISFACTORY WITH GEAR SWING.