What was found
WHILE ACCOMPLISHING TORQUE CHECK OF CENTER ATTACH BOLT OF NR 2 FLAP O/B TRACK ATTACH FITTING, THE CENTER BOLT WAS FOUND TO HAVE DAMAGED THREADS. IN ACCORDANCE WITH SB 737-57A1130, THE PREVENTATIVE MOD WILL BE INSTALLED. ADDITIONALLY, THE FLAP TRACK BUSHING WAS FOUND TO HAVE MINOR FRETTING ON THE INNER BORE. IN ACCORDANCE WITH FIGURE 4 OF SB 737-57A1130, THE BUSHING HOLE CAN BE ENLARGED TO 0.5015 MAX DIAMETER.