B737-800 flight crew reported a flight attendant was injured during a wake turbulence encounter on a...

Attributes
ACN	1577255
Time
Date	201809
Local Time Of Day	1801-2400
Place
Locale Reference	PHX.Airport
State Reference	AZ
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

Narrative:

On approach to runway 26; outside the final approach fix; with autopilot engaged at around 3000ft. The aircraft exhibited an uncommanded roll to the right followed by an immediate roll left which we attributed to wake turbulence from the preceding A321. Both rolls were excessive but I am uncertain of the bank angle that was reached. After the roll left the captain as pilot flying disengaged the autopilot and continued the approach and landed without further incident. It was soon after landing that we were informed that the #2 flight attendant was out of her seat in the rear galley and was injured during the event. Wake turbulence is difficult to predict especially without sufficient warning. We discussed the fact that a quicker disconnect of the autopilot to arrest the roll sooner may have helped. Also we were surprised at the fact that a flight attendant would be standing at that point in the flight.

Original NASA ASRS Text

Title: B737-800 flight crew reported a Flight Attendant was injured during a wake turbulence encounter on approach to PHX in trail of an A321.

Narrative: On approach to Runway 26; outside the final approach fix; with autopilot engaged at around 3000ft. The aircraft exhibited an uncommanded roll to the right followed by an immediate roll left which we attributed to wake turbulence from the preceding A321. Both rolls were excessive but I am uncertain of the bank angle that was reached. After the roll left the Captain as Pilot Flying disengaged the autopilot and continued the approach and landed without further incident. It was soon after landing that we were informed that the #2 Flight Attendant was out of her seat in the rear galley and was injured during the event. Wake turbulence is difficult to predict especially without sufficient warning. We discussed the fact that a quicker disconnect of the autopilot to arrest the roll sooner may have helped. Also we were surprised at the fact that a Flight Attendant would be standing at that point in the flight.

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.

B737-800 flight crew reported a flight attendant was injured during a wake turbulence encounter on approach to phx in trail of an A321.