# Accident 20020105000899A: Robsin R22BETA, East Troy, WI, January 5, 2002

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: January 5, 2002, 09:00 local time
- Place: East Troy, WI
- Airport: East Troy Municipal Airport
- Damage: No damage
- Operating rules: General operating rules (Part 91)
- Location: 42.7791° N, 88.3909° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=42.7791&lon=-88.3909&mi=10
- Aircraft: N215WW (not matched to a registry record)
- Reported make and model: ROBSIN R22BETA
- NTSB investigation: [NTSB CHI02LA061](https://openairdocs.org/ntsb/CHI02LA061) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20020105000899A

## Narrative

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

(.19) ON JANUARY 5, 2002, AT 0900 CENTRAL STANDARD TIME, A ROBINSON R22 HELICOPTER, N215WW, OPERATED BY WW HELICOPTERS, SUSTAINED SUBSTANTIAL DAMAGE WHEN THE LEFT, REAR CROSS TUBE COLLAPSED DURING LANDING. THE 14 CFR PART 91 INSTRUCTIONAL FLIGHT DEPARTED EAST TROY MUNICIPAL AIRPORT (57C), EAST TROY, WISCONSIN, AT 0800 ON A LOCAL TRAINING FLIGHT. THE CERTIFICATED FLIGHT INSTRUCTOR (CFI) AND PRIVATE PILOT RECEIVING INSTRUCTION WERE PRACTICING "ENGINE FAILURE IN A HOVER" MANEUVERS. WHEN THE HELICOPTER'S SKID TOUCHED DOWN ON THE FOURTH PRACTICE MANEUVER, THE HELICOPTER'S LEFT, REAR CROSS TUBE COLLAPSED. THE AIRCRAFT ROLLED COUNTERCLOCKWISE AND THE MAIN ROTOR BLADES IMPACTED THE ASPHALT PAVEMENT. THE PILOTS WERE UNINJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED AND NO FLIGHT PLAN WAS FILED. (-23) DURING INSTRUCTIONAL OPERATION THE FLIGHT INSTRUCTOR AND STUDENT WERE PRACTICING HOVERING AUTO ROTATIONS 3 TO 4 FEET ABOVE THE TAXIWAY THAT PARALLELS RWY 08/26. WHILE DESCENDING TO THE SURFACE DURING THE FOURTH EXERCISE OF THE DAY THE LEFT LANDING GEAR STRUCTURE COLLAPSED UPON TOUCHDOWN CAUSING THE AIRCRAFT TO ROLL COUNTERCLOCKWISE. AS A RESULT OF THIS MAIN ROTOR BLA                        DES STRUCK THE ASPHALT PAVEMENT WITH FURTHER DAMAGE OCCURING TO THE ROTOR HEAD AND TAIL BOOM STRUCTURE. INVESTIGATION INDICATES THE REAR CROSS TUBE FRACTURED AT THE ANGLE FITTING THAT TIES THE CROSS TUBE TO THE SKID STRUCTURE. WITH SUBSEQUENT FAILURE OF THE FORWARD FITTING AT THE SAME LOCATION.

## 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 CHI02LA061](https://openairdocs.org/ntsb/CHI02LA061), Jan 5, 2002: Robinson R22 (N215WW), East Troy, WI, substantial damage. Probable cause: The pilot receiving instruction failed to maintain the proper descent rate.

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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