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 LEFT I/B SEAT TRACK BETWEEN STATIONS 236.0 AND 564.0. MAINTENANCE REMOVED & REPLACED THE LEFT SEAT TRACK BETWEEN STATIONS 236.0 AND 564.0 IAW BOMBARDIER Q400 SRM 51-40-00, 51-42-05 AND 51-40-15. AIRCRAFT IS STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.