As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE UPON RETRACTION. RED X ON NOSE GEAR INDICATION / ADJUSTED PROX SENSOR P22 IAW CRJ 900 FIM 32-61-05-810-853 (B1 007437) & PERFORMED OPS CHECK OF THE LANDING GEAR EXT/ RET SYSTEM IAW CRJ 900 AMM 32ˆ’30ˆ’00ˆ’710ˆ’801. OPS CHECK GOOD, FAULT DID NOT REOCCUR.