As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH STEERING FAIL MESSAGE ON EICAS EVERY TIME GEAR EXTENDED. NOSEWHEEL STEERING DID INDEED FAIL. ONLY POSSIBLE DIRECTIONAL CONTROL ON GROUND WITH DIFFERENTIAL THRUST & DIFFERENTIAL BRAKING.DECLARED EMERGENCY.-C/A-RAR NOSEWHEEL STEERING MANIFOLD IAW ERJ 175 AMM 32-52-01. PERFORMED TAXI CHECK IAW GHC. OPC AND LEAK CHECK GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME.