As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK, MAINTENANCE REPORTED THE LEFT OUTBOARD SEAT TRACK AT FS 564.5 TO 664.5 HAS LEVEL 2 CORROSION. MAINTENANCE REMOVED AND REPLACED LEFT OUTBOARD SEAT RAIL FROM FS 564.5 TO 664.5 IAW BOMBARDIER Q400 SRM 51-40-15, 51-42-05 AND 51-40-07. AIRCRAFT IS CURRENTLY OUT FOR HEAVY CHECK.