As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND SUPPORT CRACKED FOR THE LEFT PACK RAM AIR VALVE. MAINTENANCE REMOVED AND REPLACED THE SUPPORT FOR THE LEFT PACK RAM AIR VALVE IAW EMB 175 SRM 51-41-01. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.