As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER BRAKE SYSTEM FAILURE ON TAXI. POWER BRAKE LOW PRESS AND ANTISKID INOP LIGHTS ON. NO BRAKE PRESSURE. TROUBLESHOT SYSTEM AND FOUND RT MAIN GEAR BRAKE LINE (FLEXHOSE) P/N AE2463509G0150, LEAKING WHEN GEAR IS OFF GROUND. REMOVED LINE AND INSTALLED A NEW ONE P/N AE2463509G0150, NO S/N. BLED BRAKES AND SERVICED RESERVOIR WITH NO FURTHER LEAKS NOTED. WORK DONE WITH REFERENCE CE560 ULTRA MM 32-42-00 AND 20-10-06.