What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
On March 24, 2018, N848SR, on a personal flight, departed Scottsdale Airpark (sdl) and flew to casa grande airport (cgz) where a touch and go was performed without incident. The occupants included a low time pilot in the left seat, a higher time certificated pilot in the right seat, and a passenger in the back seat. After departing cgz the aircraft returned to sdl for a full stop landing. Upon touchdown on runway 21 at sdl at 0920 the airplane began to porpoise, veered to the left and departed the runway crossing taxiways B12, b, and coming to a stop on taxiway c. the airplane traveled over river rock between the taxiways placed there by the airport authority to slow the momentum of aircraft experiencing a runway excursion. All three occupants were interviewed and each persons description of the event was similar. Each said the flare for landing and initial touchdown was normal, but when the nose wheel touched down it began to shimmy and then the airplane began to "balloon". The airplane bounced a second time and on the third bounce the right seat passenger advanced the throttle to max and called for a go-around. While still airborne on the third bounce, the aircraft veered to the left and departed the runway. Before departing the runway, the pilot pulled the power back. The passenger in the right seat said he advanced the power and called for a go-around because he believed the pilot had "froze" because of the look on his face and his inaction to what was happening. The airplane sustained minor, but extensive damage from the rocks. Damage included chips to the bottom surface of both wings, impact damage to both flaps, which were extended, impact damage to the inboard and outboard leading edge strips of both wings and the leading edge strips of both horizontal stabilizers, chips on the bottom and sides of the fuselage including one puncture hole, and a minor ding on the left side elevator. The nose landing gear strut was cracked and all three landing gear wheel covers were damaged. On April 3, 2018, the nose gear of the aircraft was jacked up to test the resistance force required to turn the nose wheel assembly. With a calibrated spring scale, the force required to move the wheel fork and wheel assembly was 26 pounds. The Cirrus airplane maintenance manual calls for 20 to 25 pounds of force. The lower the force required to move the wheel assembly, the more tendency for nose wheel shimmy.
As the FAA filed it
ON MARCH 24, 2018, N848SR, ON A PERSONAL FLIGHT, DEPARTED SCOTTSDALE AIRPARK (SDL) AND FLEW TO CASA GRANDE AIRPORT (CGZ) WHERE A TOUCH AND GO WAS PERFORMED WITHOUT INCIDENT. THE OCCUPANTS INCLUDED A LOW TIME PILOT IN THE LEFT SEAT, A HIGHER TIME CERTIFICATED PILOT IN THE RIGHT SEAT, AND A PASSENGER IN THE BACK SEAT. AFTER DEPARTING CGZ THE AIRCRAFT RETURNED TO SDL FOR A FULL STOP LANDING. UPON TOUCHDOWN ON RUNWAY 21 AT SDL AT 0920 THE AIRPLANE BEGAN TO PORPOISE, VEERED TO THE LEFT AND DEPARTED THE RUNWAY CROSSING TAXIWAYS B12, B, AND COMING TO A STOP ON TAXIWAY C. THE AIRPLANE TRAVELED OVER RIVER ROCK BETWEEN THE TAXIWAYS PLACED THERE BY THE AIRPORT AUTHORITY TO SLOW THE MOMENTUM OF AIRCRAFT EXPERIENCING A RUNWAY EXCURSION. ALL THREE OCCUPANTS WERE INTERVIEWED AND EACH PERSONS DESCRIPTION OF THE EVENT WAS SIMILAR. EACH SAID THE FLARE FOR LANDING AND INITIAL TOUCHDOWN WAS NORMAL, BUT WHEN THE NOSE WHEEL TOUCHED DOWN IT BEGAN TO SHIMMY AND THEN THE AIRPLANE BEGAN TO "BALLOON". THE AIRPLANE BOUNCED A SECOND TIME AND ON THE THIRD BOUNCE THE RIGHT SEAT PASSENGER ADVANCED THE THROTTLE TO MAX AND CALLED FOR A GO-AROUND. WHILE STILL AIRBORNE ON THE THIRD BOUNCE, THE AIRCRAFT VEERED TO THE LEFT AND DEPARTED THE RUNWAY. BEFORE DEPARTING THE RUNWAY, THE PILOT PULLED THE POWER BACK. THE PASSENGER IN THE RIGHT SEAT SAID HE ADVANCED THE POWER AND CALLED FOR A GO-AROUND BECAUSE HE BELIEVED THE PILOT HAD "FROZE" BECAUSE OF THE LOOK ON HIS FACE AND HIS INACTION TO WHAT WAS HAPPENING. THE AIRPLANE SUSTAINED MINOR, BUT EXTENSIVE DAMAGE FROM THE ROCKS. DAMAGE INCLUDED CHIPS TO THE BOTTOM SURFACE OF BOTH WINGS, IMPACT DAMAGE TO BOTH FLAPS, WHICH WERE EXTENDED, IMPACT DAMAGE TO THE INBOARD AND OUTBOARD LEADING EDGE STRIPS OF BOTH WINGS AND THE LEADING EDGE STRIPS OF BOTH HORIZONTAL STABILIZERS, CHIPS ON THE BOTTOM AND SIDES OF THE FUSELAGE INCLUDING ONE PUNCTURE HOLE, AND A MINOR DING ON THE LEFT SIDE ELEVATOR. THE NOSE LANDING GEAR STRUT WAS CRACKED AND ALL THREE LANDING GEAR WHEEL COVERS WERE DAMAGED. ON APRIL 3, 2018, THE NOSE GEAR OF THE AIRCRAFT WAS JACKED UP TO TEST THE RESISTANCE FORCE REQUIRED TO TURN THE NOSE WHEEL ASSEMBLY. WITH A CALIBRATED SPRING SCALE, THE FORCE REQUIRED TO MOVE THE WHEEL FORK AND WHEEL ASSEMBLY WAS 26 POUNDS. THE CIRRUS AIRPLANE MAINTENANCE MANUAL CALLS FOR 20 TO 25 POUNDS OF FORCE. THE LOWER THE FORCE REQUIRED TO MOVE THE WHEEL ASSEMBLY, THE MORE TENDENCY FOR NOSE WHEEL SHIMMY.