What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
The pilot was flying with a CFI for proficiency training. He was attempting a takeoff but reported that the aircraft was not accelerating as expected during takeoff roll and aborted the takeoff. The pilot reported that he passed his decision point on the runway before reaching takeoff speed. The CFI stated that he heard a rumbling sound from the left rear and the PIC told him the aircraft would not rotate. When the brakes were applied to slow the aircraft it veered to the left, departed the runway surface, and stopped in grass off the runway. The pilot shutdown the aircraft and inspected the plane with no damage noted. The plane was towed to a hangar and parked. A mechanic inspected the brakes and found worn brake liners on the left brake. The mechanic replaced left and right brake rotors, pads, wheel clips, and bled the system. He tested the brakes and no further issues were found.
As the FAA filed it
THE PILOT WAS FLYING WITH A CFI FOR PROFICIENCY TRAINING. HE WAS ATTEMPTING A TAKEOFF BUT REPORTED THAT THE AIRCRAFT WAS NOT ACCELERATING AS EXPECTED DURING TAKEOFF ROLL AND ABORTED THE TAKEOFF. THE PILOT REPORTED THAT HE PASSED HIS DECISION POINT ON THE RUNWAY BEFORE REACHING TAKEOFF SPEED. THE CFI STATED THAT HE HEARD A RUMBLING SOUND FROM THE LEFT REAR AND THE PIC TOLD HIM THE AIRCRAFT WOULD NOT ROTATE. WHEN THE BRAKES WERE APPLIED TO SLOW THE AIRCRAFT IT VEERED TO THE LEFT, DEPARTED THE RUNWAY SURFACE, AND STOPPED IN GRASS OFF THE RUNWAY. THE PILOT SHUTDOWN THE AIRCRAFT AND INSPECTED THE PLANE WITH NO DAMAGE NOTED. THE PLANE WAS TOWED TO A HANGAR AND PARKED. A MECHANIC INSPECTED THE BRAKES AND FOUND WORN BRAKE LINERS ON THE LEFT BRAKE. THE MECHANIC REPLACED LEFT AND RIGHT BRAKE ROTORS, PADS, WHEEL CLIPS, AND BLED THE SYSTEM. HE TESTED THE BRAKES AND NO FURTHER ISSUES WERE FOUND.