As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NLG DID NOT DEPLOY WHEN LEVER SELECTED DOWN, HAD TO MANUALLY EXTEND PER QRH. REMOVED & REPLACED PSEU I.A.W. CRJ900 AMM 32-61-01-000/400-801. PERFORMED MULTIPLE OPS CHECKS OF LANDING GEAR EXTENSION/RETRACTION I.A.W. CRJ900 AMM 32-30-00-865-801. OPS CHECKS GOOD.