Date: 202105
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Weather elements / visibility: Turbulence; Windshear; 15
Light: Daylight
Aircraft: SR22
Operator: Personal
Operating under: Part 91
Flight plan: None
Mission: Training
Flight phase: Landing
Airspace: Class D ZZZ
ATC / advisory: Tower ZZZ
Aircraft component: Main Gear
Component problem: Failed
Reporter organization: Personal
Reporter function: Pilot Not Flying; Instructor
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor; Flight Crew Air Transport Pilot (ATP)
Human factors: Human-Machine Interface
Second reporter function: Pilot Flying
Anomaly: Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Ground Strike - Aircraft; Ground Excursion Runway; Inflight Event / Encounter Loss Of Aircraft Control
Detector: Person Flight Crew
When detected: Other Landing
Result: Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; General Flight Cancelled / Delayed; General Maintenance Action
Contributing factors: Human Factors; Weather
Primary problem: Human Factors

Narrative: After an Instrument Proficiency Check and Biennial Flight Review with the aircraft owner the last landing of the day was proceeding normally with the owner/operator pilot-flying. There was a crosswind on final approach but nothing abnormal. As the aircraft was entering the flare and about 5 feet above the runway (with power at idle; on centerline; at 75 knots) the aircraft nose suddenly slewed about 45 degrees left immediately taking the aircraft off the runway and over the grass. The pilot initiated a go-around with full power. The aircraft touched down on the grass and rolled straight for several hundred feet before the right wing settled to the ground and the aircraft rotated 90 degrees right and stopped.As instructor I did call for a go-around as directional control seemed lost; but that call was simultaneous with the pilot initiating a go-around. I cannot explain the initial sudden yawing moment. I speculate that the plane was hit with a gust during the flare and there was inadequate energy; even with full power; to keep the plane from contacting the grass. The attempt to prevent the plane from settling onto the grass caused a nose high attitude; along with full flaps; probably created excessive drag preventing acceleration.The METAR at the time showed wind 30009KT The 3 METARS before the incident showed wind 24011G17KT to 28009G14KT. The landing METAR was well within the Demonstrated Cross Wind for a Cirrus SR-22; but perhaps unexpected gusts were starting as we landed.There were no injuries but the airport was closed for several hours.


Second narrative: Just prior to touch down on Runway 20 a wind gust pushed the airplane extremely hard to the left; I initiated a go around but was unable to climb and regain control. I pulled power back and landed in a grass area. The airplane slid and the right landing gear dug in to the ground and separated from the airplane. The airplane came to a stop in the grass. There were no injuries. I was flying with a CFI at the time and had just completed a Biennial Flight Review and an Instrument Proficiency Check and everything had gone fine; the day was done and were landing at my home airport. I feel the cause was a combination of a strong wind gust and wind shear.


Synopsis: SR-22 pilot and instructor reported a runway excursion during landing.