A319 first officer reported encountering severe turbulence and mountain wave at FL360 that resulted ...

Attributes
ACN	1748380
Time
Date	202006
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 34 Flight Crew Type 3531
Events
Anomaly	Deviation - Altitude Excursion From Assigned Altitude Deviation - Speed All Types Inflight Event / Encounter Weather / Turbulence Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

During a smooth ride at cruise altitude of FL360; we experienced an increase of performance of +10 kts due to mountain wave. Upon reaching up for the MCP to reduce selected speed; the turbulence and severe wave hit; causing a nearly instant and simultaneous loss of 500 feet; 30 degree rolls in either direction; and loss of 30 knots. This seemingly lasted 10-20 seconds and was accompanied by jostling bumps that made us light in our seats and shook the cabin. I disconnected the autopilot and attempted to regain control of the aircraft as the captain coordinated a lower altitude with ATC as well as monitored my performance and communicated with flight attendants. The turbulence turned to smooth air at about FL350 in the descent.

Original NASA ASRS Text

Title: A319 First Officer reported encountering severe turbulence and mountain wave at FL360 that resulted in loss of control; including loss of 500 feet in altitude and rolls of 30 degrees in both directions.

Narrative: During a smooth ride at cruise altitude of FL360; we experienced an increase of performance of +10 kts due to mountain wave. Upon reaching up for the MCP to reduce selected speed; the turbulence and severe wave hit; causing a nearly instant and simultaneous loss of 500 feet; 30 degree rolls in either direction; and loss of 30 knots. This seemingly lasted 10-20 seconds and was accompanied by jostling bumps that made us light in our seats and shook the cabin. I disconnected the autopilot and attempted to regain control of the aircraft as the Captain coordinated a lower altitude with ATC as well as monitored my performance and communicated with flight attendants. The turbulence turned to smooth air at about FL350 in the descent.

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.

A319 first officer reported encountering severe turbulence and mountain wave at FL360 that resulted in loss of control; including loss of 500 feet in altitude and rolls of 30 degrees in both directions.