What was found
UPPER CHORD ON LEFT WING RIB AT WS 1516.6 WAS CRACKED. CRACK DISCOVERED DURING HEAVY MAINTENANCE VISIT. CRACK REPAIRED PER 747-200 STRUCTURAL MANUAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UPPER CHORD ON LEFT WING RIB AT WS 1516.6 WAS CRACKED. CRACK DISCOVERED DURING HEAVY MAINTENANCE VISIT. CRACK REPAIRED PER 747-200 STRUCTURAL MANUAL.