What was found
FOUND DURING F-1 LETTER CHECK, 1.25 INCH CRACK NR 4 L/E SLAT I/B TRACK ROLLER BOX I/B STIFFENER. REPLACED STIFFENER PER M/M 57-20-21.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FOUND DURING F-1 LETTER CHECK, 1.25 INCH CRACK NR 4 L/E SLAT I/B TRACK ROLLER BOX I/B STIFFENER. REPLACED STIFFENER PER M/M 57-20-21.