As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAPS FAIL ON FINAL APPROACH. FLAPS STUCK AT 16 DEGREES, SLATS EXTENDED TO 20 DEGREES. QRH DID NOT RESOLVE THE ISSUE. (FLIGHT 4072 - FILED CLOSED) TROUBLESHOT FLAP FAIL EVENT PER CRJ 900 AMM 27-52-09. MSG DID NOT POST DURING TROUBLESHOOTING. NO HISTORY. OPS CHECK GOOD. B1-006551.