SEA02LA024

NTSB accident investigation · Hughes 369E · Grand Coulee, WA · January 8, 2002

Accident · No injuriesLimited investigationFinal report
Date
January 8, 2002, 14:30 local (22:30 UTC)
Place
Grand Coulee, WA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N369ETHughes 369E
Weather
Visual (VMC) · Day
Status
Completed · report June 3, 2002
Report
Approved by Office Director
Parties
FAA- Spokane FSDO
FAA report
20020108000419A
Case key
54033

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 NTSB’s determination of the probable cause, and any contributing factors.

The net gunner's improper decision to fire the net gun at an angle that allowed the net to become entangled in the main rotor system. A factor was foreign object damage to the main rotor blades.

Analysis

The pilot reported that the crew was attempting to capture and collar a live deer with a net gun at the time of the accident. The pilot reported that the helicopter was not in position to fire at the deer when the gunner fired the net gun. The net became tangled in the main rotor blades, and the blades sustained substantial damage. The pilot reported no prior mechanical malfunction or failure of the helicopter at the time of the accident.

Factual narrative

On January 8, 2002, about 1430 Pacific standard time, a Hughes helicopter 369E, N369ET, sustained substantial damage following a main rotor blade strike while conducting a wildlife management flight near Grand Coulee, Washington. The aircraft departed an area near Gifford, WA, for a local flight at approximately 1330. The helicopter is owned and was operated by Silverhawk Aviation, LLC, as a visual flight rules (VFR) flight under the provisions of Title 14, CFR Part 91, when the accident occurred. The commercial pilot and one crewmember aboard the helicopter were not injured. Visual meteorological conditions prevailed at the accident scene, and no flight plan was filed.

According to the pilot, he and a crewmember were attempting to capture and collar deer utilizing a net gun. The pilot reported in a written statement, "I came up behind the deer, and was working on getting level so the gunner could take the shot. I was not above the deer yet when the gunner took the shot early and shot the net into the main rotor system." According to the pilot, two of the weights from the net damaged the main rotor blades. The pilot reported that he then felt a vibration, and landed in the first available location, approximately 200 yards from the accident location.

The pilot further reported that normally the netting shot is not taken until the animal is below the helicopter's skid.

The pilot reported on the National Transportation Safety Board Pilot/Operator Aircraft Accident Report NTSB Form 6120.1/2 no mechanical malfunction or failure of the helicopter.

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.

In flight collision with objectManeuvering
Improper decisionOther crewmemberCause
Rotor system,main rotor blade - foreign object damageFactor

Aircraft

Registration
N369ET
Reported as
Hughes 369E
Category
Helicopter
Serial number
199E
Airframe hours
6,535.2
Engine
Rolls-Royce 250-C20B, 420 horsepower, turbo shaft
Damage
Substantial damage
Flight
Other work use · Part 91
Registered owner
Silverhawk Aviation, LLC
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · October 4, 2001 · 76.6 hours before
Departed
Gifford, WA
Destination
WA

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
34
Injuries
None
Certificate
Commercial
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
October 1, 2001
Seat
Left
Flight hours
2,780 total · 2,284 in this make and model · 2,449 as pilot in command · 45 in the last 90 days · 34 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
39 °F

Docket · 1

The files NTSB released with the investigation on May 10, 2002, on NTSB’s docket system: statements, records, photos and specialists’ reports. 274 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.