LAX08CA126

NTSB accident investigation · Robinson R22 Beta II · Prescott, AZ · May 2, 2008

Accident · Serious injuriesData collectionFinal report
Date
May 1, 2008, 18:30 local (May 2, 2008, 01:30 UTC)
Place
Prescott, AZ
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N331MDRobinson R22 Beta II
Defining event
Maneuvering-hover: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report June 30, 2008
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20080501835959A
Case key
67939

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The instructor's inadequate supervision and delayed remedial action that resulted in ground contact and a rollover.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedRobinson Helicopter R22: 3 casesAll aircraft: 1,310 cases
Action: delayed actionPersonnel issues › Action/decision · PilotRobinson Helicopter R22: 7 casesAll aircraft: 894 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

This was the certificated flight instructor's (CFI) first instructional flight with this new primary student. They did a preflight inspection of the helicopter together, and departed for the practice area. Once the student had a general understanding of the controls, they did an approach to a point on the ground that terminated in a hover. The CFI was letting the student manipulate the controls more and more during the hover. The CFI positioned the helicopter for a slight right quartering headwind to compensate for translating tendencies. During hover, the helicopter exhibited a pendulum oscillation that is common for new students learning to hover. During one of the right lateral oscillations, the helicopter unexpectedly lost altitude. The right skid contacted the ground, and the helicopter rolled onto its right side. Within seconds, it caught on fire. Both pilots exited immediately. The CFI stated that the airplane and engine had no mechanical failures or malfunctions during the flight.

Factual narrative

On May 1, 2008, about 1830 mountain standard time (MDT), a Robinson R22 Beta II, N331MD, collided with terrain near Prescott, Arizona. Guidance Helicopters, Inc., was operating the helicopter under the provisions of 14 Code of Federal Regulations (CFR) Part 91. The certified flight instructor (CFI) sustained serious injuries and the student pilot sustained minor injuries; the helicopter sustained substantial damage by a post crash fire. The local instructional flight departed Prescott about 1800. Visual meteorological conditions prevailed, and no flight plan had been filed.

The CFI submitted a written report. This was his first instructional flight with this student. They did a preflight inspection of the helicopter together, started up, and departed northwest for the practice area. Once the student had a general understanding of the controls, they did an approach to a tire that terminated in a hover. The CFI was letting the student manipulate the controls more and more during the hover. The CFI set up the helicopter for a slight right quartering headwind to compensate for translating tendencies.

The CFI stated that during hover, the helicopter exhibited pendulum action that is common for new students learning to hover. During one of the right lateral oscillations, the helicopter unexpectedly lost altitude. The right skid contacted the ground, and the helicopter rolled over onto its right side. Within seconds, it caught on fire. Both pilots exited immediately.

The CFI stated that the airplane and engine had no mechanical failures or malfunctions during the flight.

The CFI stated that he might have prevented the accident by maintaining a greater skid height while giving instruction, and stopping the lateral and aft movement sooner. He also could have stayed on the controls longer giving the student more time to become familiar with them. He thought that lowering the collective immediately might have prevented the rollover.

Aircraft

Registration
N331MD
Reported as
Robinson R22 Beta II
Category
Helicopter
Serial number
2886
Airframe hours
6,129
Engine
Lycoming O-360-J2A, 145 horsepower, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Instructional · Part 91
Registered owner
Guidance Helicopters, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 1, 2008
Departed
PRC · Prescott, AZ

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Flight instructor
Age
32
Certificates
Flight instructor, Commercial
Instrument ratings
Helicopter
Medical
Class 2
Last flight review
April 1, 2007
Seat
Left
Flight hours
992 total · 659 in this make and model · 183 in the last 90 days · 51 in the last 30 days
Role
Student pilot
Age
21
Certificate
Student
Medical
Class 1
Seat
Right
Flight hours
41 total · 0 in this make and model · 2 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
350° at 12 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point -6 °F
Altimeter
29.92 inHg
Observed at
PRC, 10 nm away

Docket · 1

The files NTSB released with the investigation on May 29, 2008, on NTSB’s docket system: statements, records, photos and specialists’ reports. 840 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.