As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JAM NUT HOLDING YOKE TO PEDAL BACKED OFF LETTING SHAFT ROTATE AND COME APART. WHEN ROD END (YOKE) CAME OFF OF BRAKE ACTUATOR, BRAKING ACTION WAS LOST ON LEFT BRAKE. PILOT WAS ABLE TO PARK AIRCRAFT USING STEERING AND LOWER POWER FOR TAXI. RETURN SPRING, YOKE, AND JAM NUT WERE RE-INSTALLED AND AIRCRAFT RETURNED TO SERVICE.