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 THAT THE RIGHT BRAKE PEDAL HAS 1-2 INCHES OF TRAVEL BEFORE ENGAGING. MAINTENANCE FOUND THE FLUID LEVEL OF THE LOW PRESSURE BRAKE RESERVOIR BELOW LIMITS DUE TO THE RIGHT BRAKE MASTER CYLINDER 2626GM LEAKING WHICH WAS REPLACED PER AMM 32-43-12. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.