As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DISASSEMBLY OF GEARBOX FOR N2 OVERSPEND INSPECTION, T/M GEAR HAS IMPROPER AND UNFINISHED MACHINING ON AFT SIDE OF LARGE GEAR TEETH. SECONDARY DAMAGE, PINION GEAR P/N 6893672 S/N NN76746 TT INK. SCRAP GALLING GEAR TEETH. ASSURE GEAR HARDNESS AND PROPER MACHINING AT FACTORY. (M)