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 THE RIGHT INBOARD SEAT TRACK AT FS 564.5 TO 604.5 HAS LEVEL 2 CORROSION. MAINTENANCE REMOVED AND REPLACED RT INBOARD SEAT TRACK AT FS 564.5 TO 604.5 IAW BOMBARDIER Q400 SRM 51-42-05 AND 51-40-15. A/C REMAINS IN HEAVY CHECK.