As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MULTIPLE SYSTEM FAILURES IN FLIGHT, LOSS OF CABIN PRESSURE. PASSENGER OXYGEN MASKS DEPLOYED. GROUND SENSING SQUAT SWITCH M990 FAILED. REPLACED M990 AND PERFORMED OPERATIONAL CHECK OF ALL FAILED SYSTEMS. COULD NOT DUPLICATE IN GROUND OR FLIGHT MODE.