DFW05CA207

NTSB accident investigation · Grumman G-164 · Knobel, AR · August 9, 2005

Accident · No injuriesData collectionFinal report
Date
August 9, 2005, 17:55 local (22:55 UTC)
Place
Knobel, AR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N9041QGrumman G-164
Weather
Visual (VMC) · Not reported
Status
Completed · report October 27, 2005
Report
Approved by Office Director
Parties
FSDO Little Rock,
FAA report
20050809017009A
Case key
62189

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 due to the failure of the #1 cylinder head. 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 power(partial) - mech failure/malfManeuvering - aerial application
Engine assembly,cylinder - separationCause
Forced landingDescent - emergency
On ground/water encounter with terrain/waterEmergency landing
Terrain condition - none suitableFactor

Analysis

The 1,013-hour commercial pilot, was making the last aerial application pass before returning for another load, when he heard a "pop, and the engine started missing." The pilot lined up for a forced landing on a grass strip, that was about a quarter of a mile from his location. However; the airplane impacted the ground approximately 200 yards short of the airstrip. The airplane bounced once and impacted the muddy field, and nosed over. An examination of the radial engine revealed that the number one cylinder head had cracked and separated from the barrel.

Factual narrative

On August 9, 2005, approximately 1755 central daylight time, a single-engine Grumman G-164 agricultural airplane, N9041Q, was substantially damaged during a forced landing following a loss of power while maneuvering near Corning, Arkansas. The commercial pilot, the sole occupant of the airplane, was not injured. The airplane was registered to a private individual and operated by Corning Farm Supply, Inc., of Corning Arkansas, under 14 Code of Federal Regulations Part 137 as an aerial application flight. Visual meteorological conditions prevailed and a flight plan had not been filed for the local flight.

According to a written statement submitted by the 1,013-hour pilot, he was making the last pass before returning for another load, when he heard a "pop, and the engine started missing." He lined up for a forced landing on a grass strip, that was about a quarter of a mile from his location. However, the airplane impacted a muddy field approximately 200 yards short of the landing threshold of the airstrip. He further stated that, "the airplane bounced once and struck the muddy field again and flipped over", coming to rest in the inverted position. The pilot reported that the number one cylinder head on the radial engine had cracked and separated from the barrel.

An examination of the airplane by a Federal Aviation Administration (FAA) inspector, who traveled to the scene of the accident, revealed structural damage to the fuselage when the empennage separated from the airplane.

At 1755, the automated weather observing system at Walnut Ridge Regional Airport (ARG), approximately 20 miles southwest of the accident site, reported wind at 100 degrees at 04 knots, 09 statute miles visibility, a clear sky, 90 Fahrenheit, dew point 72 degrees Fahrenheit, and an altimeter setting of 29.96 inches of Mercury.

Aircraft

Registration
N9041Q
Reported as
Grumman G-164
Category
Airplane
Serial number
1697
Airframe hours
5,818
Engine
Pratt & Whitney R-1340-AN1, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Corning Farm Supply, Inc, doing business as Corning Farm Supply, Inc
Registered owner
Cindy Woolard
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · January 1, 2005
Departed
4M9 · Corning, AR
Destination
4M9 · Corning, 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
34
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
September 1, 2003
Seat
Single
Flight hours
1,013 total · 340 in this make and model · 895 as pilot in command · 35 in the last 90 days · 31 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Not reported
Wind
100° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 72 °F
Altimeter
29.95 inHg
Observed at
ARG, 20 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 N9041Q · 1

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