As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TAXING AT SLOW SPEED BRAKE CHATTER ENCOUNTERED BOTH AUDIBLE AND FELT THRU BRAKE PEDALS. UNABLE TO DETERMINE RT OR LT SIDE. [SUP 05-03-07] BLED BRAKE SYSTEM IAW CESSNA 560 MAINT. MAN. CHAP. 32-42, AIR FOUND IN SYS, NO OTHER DEFECTS NOTED.