Robinson R22B N47NH

Summary

On 10 September 1993 at about 19:40 local time, a Robinson R22B registered N47NH, operated by Helicopter Adventures, Inc., was involved in an accident near Floriston, California, United States. 2 people were on board and 2 had minor injuries. The aircraft was substantially damaged. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

10 September 1993 at 19:40

Classification

Accident

Location

Floriston, California, United States

Coordinates

39.3900, -120.0202

Aircraft

Robinson R22B

Registration

N47NH

Category

Helicopter

Engines

1

Operator

Helicopter Adventures, Inc.

Operating rule

Part 91: General Aviation

Purpose of flight

Instructional

Phase of flight

Not recorded

Route

Reno → Unknown

Aircraft damage

Substantial

Weather

VMC

Light

Day

NTSB number

LAX93LA348

2 people had minor injuries.

the flight instructor's failure to maintain main rotor RPM after initiating a go-around from a pinnacle approach. A factor in the accident was the high density altitude condition.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The CFI was instructing his student in performing pinnacle approaches and landings to high density altitude mountainous locations. The student was initially flying. When the R22 had descended to 50 feet above the 6,100 ft MSL pinnacle, the CFI elected to made a go-around after observing that the terrain was not appropriate for the landing. The CFI took control of the helicopter, began turning right, and observed that the main rotor RPM decreased. The CFI attempted to recover RPM by reducing collective and rolling on full throttle. The R22 continued descending until colliding with a tree and terrain.

Quoted verbatim from the NTSB record.