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 DUE TO: FLIGHT CONTROL SYSTEM- A LOW PRESSUREMLIGHT ILLUMINATED; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT DFW. REMOVED AND REPLACED SYSTEM-A FLIGHT CONTROL HYDRAULIC MODULE. OPERTIONAL AND LEAK CHECK GOOD.PER MM 27-09-21.