As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROX SYS CHANNEL CAUTION MESSAGE INFLIGHT CREW RAN QRH, INCLUDING MANUAL GEAR EXTENSION AND LANDING WITHOUT NOSEWHEEL STEERING. REMOVED AND REPLACED PSEU REF AMM. OPS CHECK GOOD PERFORMED GEAR EXTENSION AND RETRACTION WITH NO DEFECTS NOTED AT THIS TIME. (K)