As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE RED MESSAGE WITH GEAR SELECT DOWN GOING INTO BHM. THE GEAR EMERGENCY HANDLE WAS USED, BUT NO EMERGNCY WAS DECLARED. AIRCRAFT LANDED SAFELY IN BHM. THEY HAD TO BE TOWED INTO THE GATE. R+R MLG SELECTOR VALVE IAW CRJ 900 AMM 32-32-10-000/400-801-A01. OPS CHECK/LEAK CHECK GOOD. PERFORMED OPERATIONAL TEST OF NOSE WHEEL STEERING SYSTEM IAW CRJ900 AMM 32-51-00-710-801-A01. STOWED MLG ALT EXT HANDLE IAW CRJ 900 AMM 32-34-00-710-802-A01.