What was found
DURING HEAVY CHECK MAINTENANCE FOUND RH WING OB MAIN SPAR 1 FOUND CRACKED. CRACKED RH WING OB SPAR 1 REMOVED AND REPLACED IAW EMB SB 170-57-0073-R1.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY CHECK MAINTENANCE FOUND RH WING OB MAIN SPAR 1 FOUND CRACKED. CRACKED RH WING OB SPAR 1 REMOVED AND REPLACED IAW EMB SB 170-57-0073-R1.