As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE WHEEL STEERING INOPERATIVE MESSAGE ON T/O ROLL, CONTINUED AND RAN QRH. DID NOT RESET. EMERGENCY DECLARED AS A PRECAUTION. VERIFIED DISCREPANCY. MDC FLAGGING RT RVDT. INPECTED RT NOSEGEAR STEERING ACTUATOR POSITION FEED BACK SENSOR. FOUND UNKNOWN LIQUID OR WATER INSIDE. CLEANED CONNECTOR W/ CONTACT CLEANER REATTACHED PLUG AND FUNCTION TESTED NOSEWHEEL STEERING SYS IAW AMM 32-51-00. ALL CHECKS OK AT THIS TIME. SDR CLOSED.