What was found
IN FLIGHT SECENDING OUT OF FL250 STEERING INOP CAUTION MSG FOLLOWED QRH PROCEDURE. AFTER LANDING WITH STEERING INOP DID RESET PRCEDURE IN AOM V1, MSG CLEARED. TAXIED 20 FEET STEERING INOP MSG AGAIN. REMOVED AND REPLACED STEERING MANIFOLD IAW AMM 32-51-50. PERFORMED OPERATIONAL CHECK OF NOSEWHEEL STEERING IAW AMM 32-51-00. OPS CHECK GOOD. ALSO PERFORMED BITE TEST OF STEERING SYSTEM IAW AMM 32-50-00. BITE TEST GOOD. NO FURTHER DEFECTS NOTED AT THIS TIME.