As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI BRAKE CHECK, FOUND COPILOT BRAKE PEDALS WERE VERY SPONGY AND THE PEDAL TRAVEL IS 3 TIMES MORE THAN THE CAPTAINS SIDE. THE RIGHT COPILOT PEDAL IS WORSE AND TRAVELS FARTHER. REMOVED AND REPLACED PILOT AND COPILOT BRAKE MASTER CYLINDERS WITH NEW DUE TO FAIL THE PRESSURE TEST. OPS CHECKED GOOD LEAK CHECKED GOOD, WORK DONE IAW 560 M.M. CHAPTER 32-42-02.