CHI03LA204

NTSB accident investigation · Continental Copters MK6B · Ft. Yates, ND · July 9, 2003

Accident · No injuriesLimited investigationFinal report
Date
July 9, 2003, 07:45 local (13:45 UTC)
Place
Ft. Yates, ND
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N9080TContinental Copters MK6B
Weather
Visual (VMC) · Dawn
Status
Completed · report March 2, 2004
Report
Approved by Office Director
Parties
FAA-Fargo FSDO
FAA report
20030709020039A
Case key
57443

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 inadvertent settling with power and unsuccessful remedial action by the pilot. A factor to the accident was the potato crop.

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 terrain/waterManeuvering - aerial application
Settling with power - inadvertentPilot in commandCause
Remedial action - not successfulPilot in commandCause
Terrain condition - cropFactor

Analysis

The helicopter impacted terrain while maneuvering for aerial application. The pilot reported he was making a "wide swing" to the left while descending. He stated the helicopter entered what he believed to be a "settling with power situation by [his] rotor wash." The pilot said he attempted to recover by dropping the collective and pushing forward on the stick. He reported he was too close to the ground to complete the recovery, so he flared to reduce his airspeed and the helicopter impacted the terrain. The spray boom caught the potato crop and the skids were caught in the wet ground. The helicopter nosed forward and rolled to the right, coming to a rest on its right side.

Factual narrative

On July 9, 2003, at 0745 mountain daylight time, a Continental Copters MK6B, N9080T, sustained substantial damage when it impacted terrain while maneuvering during an aerial application flight near Ft. Yates, North Dakota. The pilot was not injured. The 14 CFR Part 137 flight had departed approximately two minutes prior to the accident after refueling and loading chemical into the helicopter's hopper. Visual meteorological conditions prevailed at the time of the accident. No flight plan was filed.

The pilot reported he had taken off from the support truck after refilling with aerial application fluid. He stated he had flown south to return to the field, and then made a "wide swing" to the southwest. The pilot noted he continued his turn to the east, and then the north while descending to get back "on the swath." He reported the helicopter began to settle in what he described as a "settling with power situation by [his] rotorwash." The pilot stated he dropped the collective and pushed the nose forward in an attempt to recover from the settling situation. He noted, "I was already [too] close to [the] ground so I flared to reduce airspeed." The pilot reported the spray booms became caught in the potato crop and the skids caught in the wet ground. The helicopter nosed forward and rolled to the right, coming to a rest on its right side.

The pilot reported no mechanical malfunctions or defects during the accident flight.

Aircraft

Registration
N9080T
Reported as
Continental Copters MK6B
Category
Helicopter
Serial number
CCI-76-4
Airframe hours
8,629
Engine
Lycoming VO-435-A1F, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 24, 2003 · 58 hours before
Departed
Ft. Yates, ND

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
38
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
May 4, 2002
Seat
Center
Flight hours
3,200 total · 2,100 in this make and model · 3,100 as pilot in command · 90 in the last 90 days · 60 in the last 30 days · 15 in the last 24 hours

Weather

Conditions
Visual (VMC) · Dawn
Wind
340° at 7 knots
Visibility
10 statute miles
Lowest ceiling
3,900 ft broken
Temperature
68 °F, dew point 63 °F
Altimeter
29.87 inHg
Observed at
MBG, 32 nm away

FAA reports on this event · 1

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

Other investigations on N9080T · 2

Matched to the same aircraft by N-number and date.