A319 flight crew reported a stabilizer trim malfunction.

Attributes
ACN	1651026
Time
Date	201906
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Horizontal Stabilizer Trim
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Experience	Flight Crew Total 20000
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Total 12500
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

In cruise flight aircraft pitched up and autopilot disconnected. Level off engaged autopilot. Aircraft pitched up again saw trim move rapidly up. Tried autopilot 2 same malfunction. Manual flight still got sudden pitch up .8 units and elevator override. Declared an emergency notified company and advised flight attendants and passenger (passengers) of divert to abq. Pitching stopped when elac (elevator aileron computer) 1 & 2 pitch faulted. Made a precautionary overweight landing abq braking anti-skid failed during roll out. Emergency personnel saw no fluids leaking; deemed safe to proceed to gate. Stab trim malfunction.

Original NASA ASRS Text

Title: A319 flight crew reported a stabilizer trim malfunction.

Narrative: In cruise flight aircraft pitched up and autopilot disconnected. Level off engaged autopilot. Aircraft pitched up again saw trim move rapidly up. Tried autopilot 2 same malfunction. Manual flight still got sudden pitch up .8 units and elevator override. Declared an emergency notified company and advised flight attendants and PAX (Passengers) of divert to ABQ. Pitching stopped when ELAC (Elevator Aileron Computer) 1 & 2 pitch faulted. Made a precautionary overweight landing ABQ braking anti-skid failed during roll out. Emergency personnel saw no fluids leaking; deemed safe to proceed to gate. Stab trim malfunction.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.