As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE WAS REMOVED FOR TIME CHANGE TURBINE AND COMPRESSOR. UPON INSPECTION OF CHIP PLUGS, FOUND METAL CHIPS. DISASSEMBLED AND FOUND TORQUE METER GEAR AND PINION GEAR GALLING CAUSING SOME METAL CONTAMINATION DAMAGE TO THE PARTS. IMPROPER MESHING BETWEEN TORQUE METER GEAR AND PINION GEAR WAS CAUSE FOR GALLING. SECONDARY DAMAGE: PINION GEAR PN 6893672, SN NN76158. TT: 1,994.7 HOURS.