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 SIDE CABIN SEAT RAIL BETWEEN STATIONS 229.0 AND 571.0. MAINTENANCE REMOVED AND REPLACED THE RIGHT SIDE CABIN SEAT RAIL IAW BOMBARDIER Q400 SRM 51-42-05, 51-40-10, 51-42-45 & 51-40-15. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.