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 I/B SEAT TRACK BETWEEN STATIONS 564.5 AND 604.5. MAINTENANCE REMOVED AND REPLACED RIGHT I/B SEAT TRACK IAW BOMBARDIER Q400 SRM 51-42-05 & 51-40-15. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.