DEN08LA106

NTSB accident investigation · Grumman-Schweizer G-164B · O'Kean, AR · June 18, 2008

Accident · Serious injuriesLimited investigationFinal report
Date
June 18, 2008, 13:30 local (18:30 UTC)
Place
O'Kean, AR
Injuries
1 serious
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N6601QGrumman-Schweizer G-164B
Defining event
Maneuvering-low-alt flying: Aerodynamic stall/spin
Weather
Visual (VMC) · Day
Status
Completed · report December 24, 2008
Report
Approved by Office Director
Parties
FAA Flight Standards District Office
Case key
68268

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

An inadvertent accelerated stall. Contributing factors in this accident were the low airspeed, steep angle of bank, and heavy weight.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedGrumman Acft ENG Cor-Schweizer G-164B: 5 casesAll aircraft: 1,681 casesProbable cause
Aircraft capability: maximum weightAircraft › Aircraft oper/perf/capability · Capability exceededGrumman Acft ENG Cor-Schweizer G-164B: 4 casesAll aircraft: 152 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot stated that the airplane was loaded with a full load of fertilizer and fuel. He started a turn after making his last aerial application pass. He stated that as he rolled out of the turn, "the [control] stick was pulled straight to the dash and [he] could not pull it back." The airplane "tipped" on its nose and "headed straight for the ground. Before [he] hit the ground, [the pilot] could not pull the [control] stick away from the dash." Witnesses said the airplane was in a steep right turn when it "nosed straight in."

Factual narrative

On June 18, 2008, approximately 1330 central daylight time, a Grumman-Schweizer G-164B, N6601Q. registered to and operated by Kin-Co Ag Aviation, Inc., and piloted by a commercial pilot, was destroyed when it impacted terrain during an uncontrolled descent near O'Kean, Arkansas. Visual meteorological conditions prevailed at the time of the accident. The aerial application flight was being conducted under the provisions of Title 14 Code of Federal Regulations (CFR) Part 137 without a flight plan. The pilot, the sole occupant on board, was seriously injured. The local flight originated from a private airstrip in Beech Grove, Arkansas, approximately 1328. The pilot said he was carrying a full load of fertilizer and fuel. He started a turn after making his last aerial application pass. As he rolled out of the turn, "the [control] stick was pulled straight to the dash and I could not pull it back." The airplane "tipped" on its nose and "headed straight for the ground. Before I hit the ground, I could not pull the [control] stick away from the dash. The next thing I remember [was] walking away from the burning aircraft." Witnesses said the airplane was in a steep right turn after making an aerial application pass when it "nosed straight in." FAA inspectors who went to the accident site originally thought they had found evidence of a propeller blade failure. A portion of the propeller shank was found some distance from where the airplane struck the ground. Hartzell Propellers was asked to examine the propeller assembly. Hartzell reported, "Impact damage to the butt end of the fractured blades is a clear indication that both blades were intact at the time of impact. There were no discrepancies noted that would preclude normal operation. All damage was consistent with impact damage."

Aircraft

Registration
N6601Q
Reported as
Grumman-Schweizer G-164B
Category
Airplane
Serial number
128B
Engine
Garrett TPE-331-1, turbo prop
Damage
Destroyed
Fire
On-Ground
Flight
Aerial application · Part 137
Registered owner
Kin-Co Ag Aviation, Inc.
Airworthiness certificate
Special, Restricted (Special)
Departed
NONE · Beech Grove, 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
24
Injuries
Serious
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
May 1, 2007
Seat
Single
Flight hours
694 total · 206 in this make and model · 619 as pilot in command · 161 in the last 90 days · 68 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F
Altimeter
29.97 inHg

Docket · 4

The files NTSB released with the investigation on December 1, 2008, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.2 MB in all.

Other investigations on N6601Q · 1

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