As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L/H WING SLAT TRACK 1-2 I/B AFT SIDE ROLLER TURNS ROUGHLY AND O/B AFT SIDE ROLLER HAS A FLAT SPOT. (C-CHECK RO 10/22/2021) REMOVED AND REPLACED L/H WING SLAT TRACK 1-2 I/B AFT SIDE ROLLER WITH NEW UNIT REF CRJ-900 AMM 27-81-44-400-801-A01. SEE ATTACHED CONTINUATION CARD FOR DETAILS OF WORK PERFORMED. OPS TEST GOOD AT THIS TIME.