# NTSB SEA06CA160: Robinson R-22B, N228SH, Boise, ID, August 11, 2006

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Data collection · Final report
- Date: August 11, 2006, 08:55 local (14:55 UTC)
- Place: Boise, ID
- Coordinates: 43.564445, -116.231109
- Nearby events: https://openairdocs.org/map.md?lat=43.5644&lon=-116.2311&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report November 29, 2006
- Report: Approved by Office Director
- NTSB case key (mKey): 64328
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA06CA160
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/64328/pdf
- Page: https://openairdocs.org/ntsb/SEA06CA160

## Probable cause

The instructor pilot's inadvertent excessive descent rate, and his delay of remedial action during the demonstration of a 180 degree autorotation.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with terrain/water, go-around (vfr)
  - descent - excessive, pilot in command(cfi) (cause)
  - remedial action - delayed, pilot in command(cfi) (cause)
  - airport facilities,runway/landing area condition - runway

## Analysis

While demonstrating a 180 degree autorotation to landing, the instructor pilot inadvertently allowed the helicopter to attain an excessive rate of descent. Although he added power and initiated a go-around, he had waited too long to begin the go-around, and he was unable to keep the helicopter from impacting the end of the runway and bouncing back into the air. After hover-taxiing to parking, the instructor inspected the helicopter, whereupon it was determined it had sustained substantial damage.

## Factual narrative

While demonstrating a 180 degree autorotation to landing, the instructor pilot inadvertently allowed the helicopter to attain an excessive rate of descent. Although he added power and initiated a go-around, he had waited too long to begin the go-around, and he was unable to keep the helicopter from impacting the end of the runway and bouncing back into the air. After hover-taxiing to parking, the instructor inspected the helicopter, whereupon it was determined it had sustained substantial damage.

## Aircraft

- Registration: [N228SH](https://openairdocs.org/aircraft/N228SH), registered now, S/N 4014, built 2006 (OpenAirDocs)
- Reported make and model: Robinson R-22B
- Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs)
- Registry engine: [Lycoming O-360-J2A](https://openairdocs.org/engine/lycoming-o-360-j2a) (registry code 42314, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 4014
- Engines: Lycoming O-360-J2A reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Silver State Helicopter LLC, doing business as Helicopter Flight School
- Registered owner: Silver State Helicopter LLC
- Airworthiness certificate: Standard, Normal
- Departed: KBOI, Boise Air Termi, ID
- Destination: KBOI, Boise, ID
- Flight plan: Company VFR
- Airport: KBOI, Boise Air Terminal, runway 28

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Flight instructor; age 35; commercial, flight instructor; instrument ratings: helicopter; medical: class 2; flight hours: 440 total, 330 in this make and model, 200 in the last 90 days, 80 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 20060811015969A](https://openairdocs.org/incident/20060811015969A), Aug 11, 2006: Robsin R22BETA, Boise, ID, Substantial damage. (-23) The instructor pilot was demonstrating an autorotation maneuver from the 180 degree position. During the maneuver, the rotor RPM became too low. The…

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.

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