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 SEAT RAIL BETWEEN STATIONS 584.5 AND 664.5. MAINTENANCE REMOVED AND REPLACED THE RIGHT SEAT RAIL IAW BOMBARDIER Q400 SRM 51-42-05, 51-40-07 AND 51-40-15. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.