# Accident 20190523005059A: Helicopteres Guimbal CABRI G2, Cahokia, IL, May 23, 2019

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 23, 2019, 14:43 local time
- Place: Cahokia, IL
- Airport: St. Louis Downtown
- Damage: Substantial damage
- Phase of flight: Landing: Rollout
- Operating rules: General operating rules (Part 91)
- Operator: 3MYS
- Location: 38.5703° N, 90.1550° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=38.5703&lon=-90.1550&mi=10
- Aircraft: N369PA, a cancelled registration (https://openairdocs.org/deregistered/N369PA-2020-07-15) (OpenAirDocs)
- Registry model: Helicopteres Guimbal CABRI G2 (registry code 9000001, https://openairdocs.org/model/helicopteres-guimbal-cabri-g2) (OpenAirDocs)
- Registry engine: Lycoming O-360-J2A (registry code 42314, https://openairdocs.org/engine/lycoming-o-360-j2a) (OpenAirDocs)
- Reported make and model: HELICOPTERES GUIMBAL CABRI G2
- Reported engine: LYCOMING O-360-J2A
- People aboard: 2
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Commercial pilot, flight instructor, private pilot
- Pilot flight hours: 653 total, 425 in this make and model, 135 in the last 90 days
- NTSB investigation: [NTSB GAA19CA279](https://openairdocs.org/ntsb/GAA19CA279) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20190523005059A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THE STUDENT AND INSTRUCTOR WERE ATTEMPTING TO PERFORM A SIMULATED STUCK PEDAL EMERGENCY PROCEDURE AT ST. LOUIS DOWNTOWN AIRPORT. AFTER TOUCHDOWN, WHILE STILL SLIDING DOWN THE RUNWAY, THE HELICOPTER BEGAN TO DRIFT TOWARD THE LEFT EDGE OF THE RUNWAY. TO AVOID SLIDING INTO THE SOFT GROUND AT THE RUNWAY?S EDGE THE PILOTS ABORTED THE MANEUVER BY RETURNING THE THROTTLE TO THE GOVERNED RANGE AND APPLYING UP COLLECTIVE TO LIFT THE HELICOPTER TO A HOVER. (NOTE: DURING THIS MANEUVER MANUAL CONTROL OF THE THROTTLE IS USED FOR DIRECTIONAL CONTROL OF THE HELICOPTER WHILE SLIDING ON THE SKIDS. RETURNING THE THROTTLE TO THE GOVERNED RANGE REQUIRES THE ADDITION OF RPM BY ROLLING THE THROTTLE TO A MORE OPEN / POWER INCREASED POSITION). LEAVING THE RUNWAY SURFACE THE HELICOPTER BEGAN SPINNING TO THE LEFT. THE INSTRUCTOR APPLIED FULL RIGHT ANTI-TORQUE PEDAL BUT WAS UNABLE TO STOP THE LEFT-SPIN BEFORE THE SKIDS MADE CONTACT WITH THE GROUND, RESULTING IN A DYNAMIC ROLLOVER TYPE ACCIDENT. ALL THREE MAIN ROTOR BLADES WERE DESTROYED BY POWERED CONTACT WITH THE GROUND. ADDITIONALLY, THE TAIL BOOM WAS COMPLETELY SEVERED JUST FORWARD OF THE FENESTRON AND THE LEFT HORIZONTAL FIN WAS DAMAGED. FURTHER, THE SKIDS WERE MISALIGNED BY CONTACT WITH THE GROUND AND THERE WAS POSSIBLE DAMAGE TO THE SKID MOUNTING POINTS ON THE AIRFRAME WITH SOME AIRFRAME DAMAGE POSSIBLE AS WELL. SUDDEN-STOPPAGE DAMAGE IS LIKELY TO ALL DYNAMIC COMPONENTS.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB GAA19CA279](https://openairdocs.org/ntsb/GAA19CA279), May 23, 2019: Guimbal Cabri (N369PA), St. Louis, IL, substantial damage. Probable cause: The flight instructor's improper emergency procedure instruction to the student pilot, which resulted in the student improperly using the throttle to correct the loss of yaw control, which resulted…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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