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 MAINTENANCE REPORTED LEVEL 2 CORROSION ON THE RIGHT O/B SEAT TRACK BETWEEN STATIONS 235.0 & 564.5. MAINTENACE REMOVED & REPLACED THE RIGHT O/B SEAT TRACK IAW BOMBARDIER Q400 SRM 51-42-05, 51-42-45, 51-40-15 & 51-40-07. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.