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 THE FIRE EXTINGUISHER LINE FORWARD OF SPAR 3 FOR RIGHT ENGINE HAS CORROSION. MAINTENANCE REMOVED AND REPLACED FIRE EXTINGUISHER LINE FORWARD OF SPAR 3 FOR RIGHT ENGINE IAW EMB 175 AMM 20-10-13. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.