As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAPS FAIL CAUTION MESSAGE, FLAPS FAIL AT 20 DEGS. PERFORMED TROUBLESHOOTING PER BOMBARDIER FIM REV 39 IAW AD 2009-06-12 PARAGRAPH (H)(6)(I). PER AMOC DATED MARCH 27 2009 AND PA AD27-052F. REMOVED AND REPLACED LT BPSU IAW CRJ AMM 27-51-10. RIGGED LT BPSU IAW CRJ AMM 27-51-10-830, FLAPS OP CHECK GOOD IAW CRJ AMM 27-54-00.