As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN FOR HEAVY CHECK, LEVEL 2 CORROSION WAS FOUND ON THE RIGHT INBOARD SEAT RAIL BETWEEN STATION X116.0 TO X236.0, MAINTENANCE REMOVED AND REPLACED THE RIGHT INBOARD SEAT RAIL BETWEEN STATION X116.0 TO X236.0, IAW BOMBARDIER Q400 SRM 51-40-10, 51-41-00 & 51-42-05. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.