What was found
DURING OP 16 MAINT CHECK, FOUND AT STA 737 BETWEEN WING CENTER SECTION AND FLOOR LINE CASTING WAS CRACKED, ALSO 3 INCHES I/B OF CASTING, ON RT SIDE. INSTALLED NEW FRAME PER SERVICE BULLETIN 53-131.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING OP 16 MAINT CHECK, FOUND AT STA 737 BETWEEN WING CENTER SECTION AND FLOOR LINE CASTING WAS CRACKED, ALSO 3 INCHES I/B OF CASTING, ON RT SIDE. INSTALLED NEW FRAME PER SERVICE BULLETIN 53-131.