FTW99LA079

NTSB accident investigation · Miller/Bell TR-1 · Hiwasse, AR · February 8, 1999

Accident · No injuriesLimited investigationFinal report
Date
February 8, 1999, 17:20 local (23:20 UTC)
Place
Hiwasse, AR
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N9194XMiller/Bell TR-1
Weather
Visual (VMC) · Day
Status
Completed · report April 25, 2001
Report
Approved by Office Director
Case key
45765

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 inadequate compensation for prevailing wind conditions. Factors were the crosswind, the lack of suitable terrain, and the separation of the adell clamp for the oil cooler inlet line.

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.

Airframe/component/system failure/malfunctionCruise
Miscellaneous,bolt/nut/fastener/clamp/spring - separationFactor
Lubricating system,oil line - leak
Forced landingEmergency descent/landing
Precautionary landing - attemptedPilot in command
Loss of control - in flightLanding - flare/touchdown
Weather condition - crosswindFactor
Compensation for wind conditions - inadequatePilot in commandCause
In flight collision with objectLanding - flare/touchdown
Terrain condition - none suitableFactor
Object - building(nonresidential)

Analysis

The aircraft collided with a hog-house during a precautionary landing after the engine oil pressure dropped to zero. The pilot set up for a landing in an east-west oriented field; however, the wind was from the south at 12 knots gusting to 20 knots. During the landing flare, the wind pushed the airplane into the side of a poultry house, resulting in the aircraft spinning around and coming to rest in the field. The pilot inspected the engine compartment and found that the adell clamp on the oil-cooler inlet line had 'separated' allowing the engine oil to drain out.

Factual narrative

On February 8, 1999, approximately 1720 central standard time, a Miller/Bell TR-1 amateur-built experimental airplane, N9194X, was substantially damaged when it impacted a building during a precautionary landing near Hiwasse, Arkansas. The private pilot and his passenger, who were the builders and owners of the airplane, were not injured. Visual meteorological conditions prevailed and a flight plan was not filed for the 14 Code of Federal Regulations (CFR) Part 91 local flight, which originated from Smith Field, Siloam Springs, Arkansas, approximately 1635.

According to the enclosed Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2), and telephone interviews conducted by the investigator-in-charge, the pilot stated that approximately 45 minutes into the flight he heard the engine noise change. The pilot then checked the oil pressure, which indicated zero. After reducing engine power, the pilot elected to make a precautionary landing on a road adjacent to a field and a hog-house. The pilot stated that the winds were from the south; however, the road ran along an east-west heading. According to the pilot, during the landing flare, the wind pushed the aircraft into the side of the hog-house. The aircraft's right wing scraped the side of hog-house causing the airplane to spin around and impact a three foot extension of the building.

At 1139, the Northwest Arkansas Regional Airport weather observation facility, which is approximately 15 miles northeast of the accident site, was reporting the wind from 180 degrees at 12 knots gusting to 20 knots.

The FAA inspector reported that the left wing spar was damaged and the nose gear collapsed. According to the pilot, upon inspection of the aircraft following the accident, he noticed that the adell clamp for the oil cooler inlet line had "separated," which allowed the oil to spill overboard.

The airplane had accumulated a total of 41 hours since its original airworthiness inspection dated April 17,1998.

Aircraft

Registration
N9194X
Reported as
Miller/Bell TR-1
Category
Airplane, amateur-built
Serial number
088
Airframe hours
41
Engine
Lycoming O-235-C2C, 108 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Bobby R. Miller
Registered owner
Orville And Wilbur Airplane Co
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · April 17, 1998 · 41 hours before
Departed
SLG · Siloam Springs, AR

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
66
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
560 total · 41 in this make and model · 530 as pilot in command · 1 in the last 90 days · 1 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 12 knots, gusting 20
Visibility
15 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 46 °F
Altimeter
29.00 inHg
Observed at
XNA, 15 nm away