As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DISASSEMBLY OF GEARBOX, THE DRIVE GEAR RETENTION NUT WAS REMOVED WITH NO TORQUE REQUIRED. INSTALLATION TORQUE IS 1550 - 1600 FEET/POUNDS. (NUT P/N 775770-4, FIG 7 ITEM 25). HSS SO NR 86355SE. CUST: AIR OSTRAVA/GE. CMM 72-11-02. (X)