As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKE PRESSURE LIGHT: DURING TAXI OUT OF THE CHOCKS BOTH THE LOW BREAK PRESSURE ANNUNCIATOR AND ANTISKID INOP ANNUNCIATOR ILLUMINATED. WE IMMEDIATELY STOPPED THE AIRCRAFT AND HAD IT TOWED BACK TO PARKING. // SIGNOFF // REMOVED BRAKE SYSTEM HYDRAULIC PUMP P/N 9912166-3,...S/N 6435 AND INSTALLED CUSTOMER SUPPLIED NEW UNIT P/N 9912166-3 S/N 5BT11 , SERVICED RESERVOIR AS REQUIRED AND OPS CHEKCED GOOD WITH REFERENCE TO CE 560 XL AMM 32-44-20.