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 LEFT O/B SEAT RAIL WEBBING HAS 3 ELONGATED HOLES, 2 AT STATION 354.0 AND 1 AT STATION 285.0. MAINTENANCE PERFORMED MAJOR REPAIR TO WEBBING AT STATIONS 354.0 AND 285.0 IAW BOMBARDIER EO. DHC-8-400-53-L01797. PART NUMBERS 85361565 & 85361567 WERE USED. AIRCRAFT IS CURRENTLY STILL OUT OF SERVICE FOR HEAVY CHECK COMPLETION.