As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR DISAGREE MESSAGE IN FLIGHT WHEN GEAR UP SELECTED. CREW DECLARED EMERGENCY AND DIVERTED TO CAK. INTERROGATED MDC AND FOUND MULTIPLE FAULTS FLAGGING NLG PROXIMITY SENSOR PX22. FOUND PX22 TO BE READING "DEGRADED FAR" IN MDC WITH GEAR UP WHEN IT WAS SUPPOSED TO BE "VALID NEAR". ADJUSTED PX22, IAW CRJ 900 AMM 32-61-05-820-804-A01-PSA. OPS CHECK GOOD AT THIS TIME. GEAR WAS SWUNG MULTIPLE TIMES AFTER ADJUSTMENT AND FAULT DID NOT REOCCUR.