As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER BRAKE CB POPPED UPON ENGINE START, ANTI SKID INOP ANNUNCIATOR ILLUMINATED, RESET. DID SAME THING AGAIN ON TAXI. RETURNED TO RAMP. NOTICE BRAKES WERE VERY WEAK. ABOUT 30 SECONDS AFTER, LO BRAKE PRESS ANNUNCIATOR CAME ON. ONLY EMERGENCY BRAKES AVAIALABLE. HYDRAULIC PUDDLE FOUND UNDER NOSE GEAR. MX C/A: BLED BRAKES AND AT CUSTOMERS REQUEST PWR BRAKE CIRCUIT BREAKER WAS REMOVED AND REPLACED WITH NEW PN: S2899L15.0 IAW CESSNA CITATION MM 24-50-02