What was found
DURING SCHEDULED C4 CHECK, FOUND CRACKED I/B AFT UPPER WING PANEL STUB RIB. REPAIRED PER BOEING SRM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING SCHEDULED C4 CHECK, FOUND CRACKED I/B AFT UPPER WING PANEL STUB RIB. REPAIRED PER BOEING SRM.