As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DURING APPROACH INTO DFW DUE TO A GREEN HYDRAULIC SYSTEM RESERVOIR LOW AIR PRESSURE ECAM MESSAGE. THE AIRCRAFT LANDED SAFELY AT DFW WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED TSM 29-11-00-810-816-A AND REPLACED PRESSURE SWITCH 1151GN PER AMM 29-32-12. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.