As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ECAM - HYD Y SYS LO PR - APPEARED 20-30 MINUTES AFTER ITEM 1 ECAM ABOVE ACTUAL Y HDY SYSTEM PRESSURE INDICATED NORMAL AT 3000 PSI ALL RESERVOIR, VALVE, A/ENG PUMP PRESSURES WHERE NORMAL AND GREEN. THE TOP TRIANGLE AND YELLOW LETTERS ON TOP ON SYSTEMS PAGE DISPLAYED IN AMBER. NOSE WHEEL STEERING WAS INOPERATIVE AFTER LANDING.-ACCOMPLISHED T/S IAW TSM 29-13-00-810-805-A AND PRESSURIZED YELLOW HYD SYSTEM IAW AMM 29-24-00-863-001. NO FAULTS FOUND AT THIS TIME A/C OK FOR SERVICE MOC 119918.