DFW08LA122

NTSB accident investigation · Robinson R44 · Bartlett, TX · April 28, 2008

Accident · FatalLimited investigationFinal report
Date
April 28, 2008, 10:30 local (15:30 UTC)
Place
Bartlett, TX
Injuries
1 fatal, 1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N477SHRobinson R44
Defining event
Takeoff: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed · report December 28, 2008
Report
Approved by Office Director
Parties
FAA FSDO, Robinson Helicopter Company
FAA report
20080428838599A
Case key
67903

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 tail rotor clearance from terrain (embankment) during takeoff.

Findings · 4

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.

Personnel issuesPersonnel issues › Task performance · PilotRobinson Helicopter R44 II: 3 casesAll aircraft: 137 casesProbable cause
Not determinedNot determined › Not determined · Unknown/Not determinedRobinson Helicopter R44 II: 24 casesAll aircraft: 2,247 casesProbable cause
Environmental issuesEnvironmental issues › Physical environment · Not specifiedRobinson Helicopter R44 II: 1 caseAll aircraft: 24 cases

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

The private (airplane) rated pilot, who did not hold a rotorcraft rating, attempted to depart in a single-engine helicopter with one passenger on-board. The pilot reported that as he started his takeoff, "the helicopter came off the ground approximately 2 feet, but I felt it was in a malfunction mode, rotated 30 degrees to the left, and set it back down on both skids. While in the malfunction mode, I felt a jar to my left pedal and/or side." The pilot also stated that he thought the main rotor blade had hit the tail cone and disintegrated. A post-crash fire erupted. The passenger initially was slow in exiting the aircraft, and was pulled from the fire by the pilot once he had exited the aircraft. An inspection of the helicopter and the accident site indicated that during the takeoff sequence the helicopter's tail skid/rotor hit an embankment, located just behind the helicopter's landing area. The on-scene examination also revealed that helicopter's main rotor blades displayed "coning" effect; the tail rotor drive shaft appeared to be intact prior to the fire, and the tail rotor blades displayed damage that was consistent with ground strikes. Records on the helicopter revealed that the pilot/owner had purchased the helicopter 7 days prior to the accident date. Additionally, the helicopter had been disassembled for shipment, while being offered for sale. The condition of the helicopter at the time of sale was listed as, "not airworthy", and was sold, "as is"; however, the condition at the time of the flight was not known.

Factual narrative

On April 28, 2008, approximately 1030 central daylight time (CDT), a single-engine Robinson R44 helicopter, N477SH, was destroyed by a post-crash fire after impacting the ground following an attempted takeoff from a private field, near Bartlett, Texas. The pilot received minor injuries and the single passenger sustained fatal injuries. The helicopter was owned and operated by the pilot. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The flight was originating at the time of the accident.

In a written statement to the NTSB the pilot stated that, "... the helicopter came off the ground approximately 2 feet, but I felt it was in a malfunction mode, rotated 30 degrees to the left, and set it back down on both skids. While in the malfunction mode, I felt a jar to my left pedal and/or side." The pilot added, that he thought the main rotor blade had hit the tail cone and disintegrated. Seeing a fire in or above the engine area, the pilot told his passenger to exit the helicopter; however, the passenger seemed to have trouble opening the left door. The pilot stated that by the time he exited the helicopter on the right side and walked around the front of the helicopter, the passenger had gotten out of the helicopter and shut the door. The pilot added that the passenger started forward, turned, and walked past the helicopter's rear door and into the fire. The pilot was able to pull the passenger away from the fire. The helicopter's airframe was largely consumed by the post crash fire. The passenger succumbed to his injuries, approximately two weeks later.

The Federal Aviation Administration (FAA) Inspector, who responded to the accident site, indicated that during the take-off sequence the helicopter’s tail skid/rotor hit an embankment, located just behind the helicopter landing area. Additionally, photographs taken of the site show that the helicopter's main rotor blades displayed a, "coning" effect; the tail rotor drive shaft appeared to be intact prior to the fire, and the tail rotor blades had evidence of a ground strike on them.

The helicopter pilot/owner had purchased the helicopter 7 days prior to the accident date. Additionally, the helicopter was previously owned by a flight school and the helicopter had been disassembled for shipment, while being offered for sale. The accident pilot reportedly bought the aircraft and had a local mechanic re-assemble the helicopter. The condition of the helicopter at the time of sale was listed as "not airworthy", and was sold, "as is." The maintenance records for the helicopter were not made available for this investigation.

An examination of records on file with the Federal Aviation Administration (FAA) Airmen's record branch in Oklahoma City, Oklahoma, revealed that the pilot held a single-engine (land) private airplane certificate; a rotorcraft certificate was not noted. The record lists his last FAA third class flight medical on February 21, 2006.

Despite several attempts to contact the pilot were made, the pilot failed to submit a completed copy of NTSB Form 6120.1, Pilot/Operator Accident Report.

At 1046, the automated weather observing system at the Georgetown Municipal Airport, (GTU), located approximately 14 miles west of the accident site, reported wind from 290 degrees at 7 knots, 10 miles visibility, a clear sky, temperature 63-degrees Fahrenheit, dew point 36-degrees Fahrenheit, and an altimeter setting of 30.28 inches of Mercury.

Aircraft

Registration
N477SH
Reported as
Robinson R44
Category
Helicopter
Serial number
10904
Airframe hours
2,155.8
Engine
Lycoming IO-540, reciprocating
Damage
Substantial damage
Fire
On-Ground
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
Bartlett, TX
Destination
AR
Flight plan
Unknown

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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
65
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3
Seat
Right

Weather

Conditions
Visual (VMC) · Day
Wind
290° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 36 °F
Altimeter
30.28 inHg
Observed at
KGTU

FAA reports on this event · 1

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