DFW07CA086

NTSB accident investigation · Brantly Helicopter B2 · Vernon, TX · March 19, 2007

Accident · No injuriesData collectionFinal report
Date
March 19, 2007, 10:30 local (15:30 UTC)
Place
Vernon, TX
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N5931XBrantly Helicopter B2
Weather
Visual (VMC) · Day
Status
Completed · report May 29, 2007
Report
Approved by Office Director
Parties
Fort Worth, Texas., Lycoming
FAA report
20070319004139A
Case key
65443

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 loss of engine power for undetermined reasons. A contributing factor was the lack of suitable terrain for the forced landing.

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 engine powerCruise
Reason for occurrence undeterminedCause
In flight collision with terrain/waterEmergency descent/landing
Terrain condition - none suitableFactor
Object - tree(s)

Analysis

The 3,696-hour pilot, who reported having accumulated a total of 96 hours in the same make and model as the accident helicopter, reported that while returning to the airport, following a short local flight, the engine lost power without warning. The pilot reported that the helicopter was at an altitude of approximately 75-feet above the ground when the loss of engine power occurred. The pilot added that he initiated an autorotation and due to his altitude, he did not have many forced landing options other than to continue straight ahead. The helicopter came to rest in the upright position in a field among mesquite trees. All three main rotor blades were destroyed and the fuselage sustained minor damage. Both the pilot and his passenger egressed the helicopter through the side doors without injuries. The helicopter was reported to have 15 gallons of fuel on board prior to its departure on the 15-minute flight. The reason for the reported loss of engine power could not be determined. A Federal Aviation Administration (FAA) Inspector, who responded to the accident site, reported that the aircraft had been stored in a hangar with the airworthiness certificate removed for approximately 30 years prior to its re-issuance on February 15, 2007. The 1969 model helicopter was reported to have accumulated a total of 570 hours since new. Weather was reported as clear skies, wind from 200 degrees at 16 knots, and an altimeter setting of 29.90 inches of Mercury.

Factual narrative

The 3,696-hour pilot, who reported having accumulated a total of 96 hours in the same make and model, reported that while returning to the airport, following a short local flight, the engine lost power without warning. The pilot reported that the helicopter was at an altitude of approximately 75-feet above the ground when the loss of engine power occurred. The pilot added that he initiated an autorotation and due to his altitude, did not have many forced landing options other than continue straight ahead. The helicopter came to rest in the upright position in a field among mesquite trees. All three main rotor blades were destroyed and the fuselage sustained minor damage. Both the pilot and his passenger egressed the helicopter through the side doors without injuries. The helicopter was reported to have 15 gallons of fuel on board prior to its departure on the 15 minute flight. The reason for the reported loss of engine power could not be determined. A Federal Aviation Administration (FAA) Inspector, who responded to the accident site, reported that the aircraft had been stored in a hangar with the airworthiness certificate removed for approximately 30 years prior to its re-issuance on February 15, 2007. The 1969 model helicopter was reported to have accumulated a total of 570 hours since new. Weather was reported as clear skies, wind from 200 degrees at 16 knots, and an altimeter setting of 29.90 inches of Mercury.

Aircraft

Registration
N5931X
Reported as
Brantly Helicopter B2
Category
Helicopter
Serial number
69
Airframe hours
570
Engine
Lycoming VO-360-A1B, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · March 1, 2007
Departed
F05 · Vernon, TX
Airport
F05 · Wilbarger County Airport

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
29
Injuries
None
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
August 1, 2006
Seat
Right
Flight hours
3,696 total · 96 in this make and model · 2,080 as pilot in command · 280 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
200° at 16 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
66 °F, dew point 61 °F
Altimeter
29.89 inHg
Observed at
F05

FAA reports on this event · 1

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