As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING ROLL BELOW 60 KNOTS, PILOTS RT BRAKE PEDAL WENT TO THE FLOOR. RIGHT PILOT GOT THE AIRPLANE SLOWED TO TAXI SPEED, THEN HIS RT PEDAL WAS INTERMITTENTLY SPONGY. AFTER CLEARING THE RUNWAY, TRIED THE BRAKES AGAIN & THE PILOT RIGHT WENT ALMOST TO THE FLOOR AGAIN. WE HAD THE AIRPLANE TOWED IN. NO EMERGENCY BRAKE USED. POST FLIGHT HAD NO FLUID LEAKS OR FLAT SPOTS ON BOTH MAINS.