SEA06CA072

NTSB accident investigation · Robinson R22 Beta · Tooele, UT · April 8, 2006

Accident · Minor injuriesData collectionFinal report
Date
April 8, 2006, 11:05 local (17:05 UTC)
Place
Tooele, UT
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N921URobinson R22 Beta
Weather
Visual (VMC) · Day
Status
Completed · report August 29, 2006
Report
Approved by Office Director
FAA report
20060408003729A
Case key
63456

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 pilot's failure to maintain control of the helicopter during the takeoff initial climb, which resulted in an in-flight collision with the ground. A contributing factor was the gusty wind condition.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightTakeoff - initial climb
Aircraft control - not maintainedPilot in command(cfi)Cause
Weather condition - gustsFactor
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - ground

Analysis

According to the flight instructor, he and his student had landed at the airport to refuel before continuing their lesson. The wind speed was "17 gusting 24" knots. He restarted the helicopter and hovered to position it for takeoff. He began a climb to the southwest with an indicated airspeed of 45 knots. The instructor said that "upon reaching an altitude of 50-70 feet agl, the aircraft ceased climbing" and "began to be pushed aft and down." He attempted to regain control but was unsuccessful. The helicopter struck the ground in a level attitude, the front of the left skid caught in the soft uneven ground, and the helicopter rolled left. The main rotor blade struck the tail cone, and the helicopter came to rest on its left side. The pilot indicated there was no mechanical malfunction or failure of the helicopter prior to the accident.

Factual narrative

On April 8, 2006, approximately 1105 mountain daylight time, a Robinson R22 Beta, N921U, collided with the ground in an uncontrolled descent following a loss of control during the takeoff initial climb at Bolinder Field - Tooele Valley Airport, Tooele, Utah. The helicopter, which was registered to Tumbleweed Leasing Company, Inc., of Salt Lake City, Utah, and operated by Upper Limit Aviation of Salt Lake City, sustained substantial damage. The flight instructor and the student pilot were not injured. Visual meteorological conditions prevailed for the instructional flight conducted under 14 CFR Part 91. No flight plan was filed. The helicopter was departing with an intended destination of Salt Lake City when the accident occurred.

According to the flight instructor, he and his student had landed at the airport to refuel before continuing their lesson. The wind speed was "17 gusting 24" knots. He restarted the helicopter and hovered to position the ship for takeoff. He began a climb to the southwest with an indicated airspeed of 45 knots. "Upon reaching an altitude of 50-70 feet agl, the aircraft ceased climbing" and "began to be pushed aft and down." He attempted to regain control but was unsuccessful. The helicopter struck the ground in a level attitude, the front of the left skid caught in the soft uneven ground, and the helicopter rolled left. The main rotor blade struck the tail cone, and the helicopter came to rest on its left side. The pilot indicated there was no mechanical malfunction or failure of the helicopter prior to the accident.

The following wind conditions were recorded at Salt Lake City International Airport, located approximately 20 nautical miles northeast of Tooele: At 0956, wind from 150 degrees at 13 knots. At 1056, wind from 150 degrees at 22 knots with gusts to 26 knots, remark peak wind from 150 degrees at 26 knots at 1055. At 1156, wind from 170 degrees at 15 knots with gusts to 22 knots, remark peak wind from 160 degrees at 26 knots at 1118.

Aircraft

Registration
N921U
Reported as
Robinson R22 Beta
Category
Helicopter
Serial number
3566
Engine
Lycoming O-360, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Upper Limit Aviation
Registered owner
Tumbleweed Leasing Company Inc.
Airworthiness certificate
Standard, Normal
Departed
TVY · Tooele, UT
Destination
SLC · Salt Lake City, UT
Airport
TVY · Bolinder Field - Tooele Valley

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
Pilot
Age
40
Certificates
Commercial, Flight instructor
Medical
Class 2, With waivers/limitations
Flight hours
2,100 total · 1,893 in this make and model · 150 in the last 90 days · 50 in the last 30 days
Role
Student pilot
Age
46
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2
Flight hours
304 total · 47 in this make and model · 18 in the last 90 days · 3 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.