As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BRAKES ARE SPONGY ON LANDING, DURING A STATIC TAKEOFF THE BRAKES WOULD NOT HOLD THE AIRCRAFT ABOVE 75% N1 FROM EITHER PILOT SEAT. BLED ALL BRAKES. TAXIED ACFT TO RUN-UP AREA AND RAN BOTH ENG'S TO 85 PERCENT N1 AT SAME TIME. BRAKES HELD AND NOT SPONGY. OPS AND LEAK CHECK GOOD. DONE IN REF TO CE750 MM CH 32-42-01.