What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
N737GR was taxiing via taxiway "a" for runway 20. The plane made several left and right turns with nose wheel steering and brakes during taxi. The student pilot stated that, while maneuvering in the runup area, he experienced a right brake failure. He passed flight controls to CFI. The CFI stated he also had right brake failure. The plane continued off the taxiway. The CFI pulled mixture to idle-cutoff and stopped the engine. The plane rolled into the grass area while striking a taxiway light with left main tire. Plane was towed to the ramp without incident.
As the FAA filed it
N737GR WAS TAXIING VIA TAXIWAY "A" FOR RUNWAY 20. THE PLANE MADE SEVERAL LEFT AND RIGHT TURNS WITH NOSE WHEEL STEERING AND BRAKES DURING TAXI. THE STUDENT PILOT STATED THAT, WHILE MANEUVERING IN THE RUNUP AREA, HE EXPERIENCED A RIGHT BRAKE FAILURE. HE PASSED FLIGHT CONTROLS TO CFI. THE CFI STATED HE ALSO HAD RIGHT BRAKE FAILURE. THE PLANE CONTINUED OFF THE TAXIWAY. THE CFI PULLED MIXTURE TO IDLE-CUTOFF AND STOPPED THE ENGINE. THE PLANE ROLLED INTO THE GRASS AREA WHILE STRIKING A TAXIWAY LIGHT WITH LEFT MAIN TIRE. PLANE WAS TOWED TO THE RAMP WITHOUT INCIDENT.