As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKES REQUIRE EXCESSIVE PRESSURE TO ACTIVATE, WHEN THEY DO ACTIVATE THEY GRAB THEN FADE TO A HARD PEDAL WITH LITTLE BRAKING ACTION. DUPLICATED DISCREPANCY DURING TAXI CHECK & FOUND AIR TO BE IN BRAKE SYS. PROCEDED TO PERFORM BRAKE BLEEDING ACTIONS IAW MM 32-40-20 PERFORMED TAXI CHECK. OPS CHECK OF BRAKES OK.