As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROX SYSTEM MSG AFTER GEAR RETRACTION. COMPLETED QRH AND RETURNED TO ORF. INTERROGATED CRJ 900 FIM 32-32-10-810-804 FOR B-1 CODE 007192 AND CHANGED THE LANDING GEAR SELECTOR VALVE IAW CRJ 900 AMM 32-32-10-000/400-801-A01. AFTER GEAR SWING NO FAULTS WERE NOTED. OPS CHECK GOOD.