As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE TGB CENTER HOUSING WAS FOUND CRACKED WHILE INSTALLED ON THE AIRCRAFT. IT WAS REMOVED PREMATURELY ON SEPTEMBER 3, 2000. THE SHOP DETECTED THE CRACK VISUALLY. THE CRACK BEGAN AT THE SECOND ROSAN STUD CLOCKWISE FROM THE ROSAN SEAT PAD LOCATED 34 DEGREES FROM CENTERLINE OF INPUT BORE. THE CRACK EXTENDED RADIALLY THROUGH 3/8-16 NC TAPPED BORE ABOUT 3/4 OF AN INCH THROUGH THE WEB. PROBABLE CAUSE IS UNKNOWN AT THIS TIME.