As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DISASSEMBLY, FOUND RIGHT FORWARD IDLER TAB WASHER BROKEN. BROKEN DAMPER RINGS ALSO. NOTE: THE RT AFT, LT AND RT FWD BEARINGS ALL HAVE MISMATCHED SERIAL NUMBERS ON THE INNER AND OUTER RACES. HSS SO NR 230418 SO. CUST: MESABA A/L. (X)