DFW05CA177

NTSB accident investigation · Grumman-Schweizer G-164C · Gillett, AR · July 1, 2005

Accident · No injuriesData collectionFinal report
Date
July 1, 2005, 16:30 local (21:30 UTC)
Place
Gillett, AR
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6626KGrumman-Schweizer G-164C
Weather
Visual (VMC) · Day
Status
Completed · report October 27, 2005
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20050701015349A
Case key
61902

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

The loss of engine power resulting from a disconnected discharge pressure line at the fuel control unit. 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 powerManeuvering - aerial application
Fuel system,line fitting - disconnectedCause
Forced landingDescent - emergency
In flight collision with objectEmergency landing
Object - tree(s)
In flight collision with terrain/waterEmergency landing
Terrain condition - none suitableFactor

Analysis

The 18,738-hour pilot reported that while applying an aerial application of fertilizer to a field, the engine lost power. The pilot initiated a forced landing to a nearby field. During the forced landing, the airplane impacted trees and came to rest upright. A post-impact fire comsumed most of the airframe. Examination of the sooted engine revealed that the discharge pressure line (P3) at the fuel control unit was disconnected. The threads at the "B" nut were also covered with soot.

Factual narrative

On July 1, 2005, at 1630 central daylight time, a tail-wheel equipped Grumman-Schweizer G-164C single-engine turbine powered agricultural airplane, N6626K, was destroyed during a forced landing following a loss of engine power while performing an aerial application near Gillett, Arkansas. The commercial pilot, sole occupant of the airplane, was not injured. The airplane was registered to and operated by Trites Flying Service, Inc., of Gillett, Arkansas. Visual metrological conditions prevailed and a flight plan was not filed for the 14 Code of Federal Regulations Part 137 aerial application flight. The local flight originated from the operator's private airstrip near Gillett, Arkansas, at 1615.

The 18,738-hour pilot reported in the Pilot/Operator Aircraft Accident Report (NTSB Form 6120.1/2) that during an aerial application of fertilizer to a field, the engine "lost partial power." The pilot initiated a forced landing to a nearby field. During the forced landing, the airplane impacted trees and came to rest upright. Subsequently, a postcrash fire consumed most of the airplane.

Examination of the Allied Signal TPE331-6-252M engine was conducted on July 29, 2005, at the facilities of Air Salvage of Dallas, near Lancaster, Texas, by the NTSB investigator-in-charge (IIC). The examination revealed that the engine was covered with soot, and the "B" nut (tubing nut that is used to hold flared tubing to a threaded fitting) from the discharge pressure line (P3) at the fuel control unit was disconnected. The threads of the "B" nut were also covered with soot.

Aircraft

Registration
N6626K
Reported as
Grumman-Schweizer G-164C
Category
Airplane
Serial number
8C
Engine
Allied Signal TPE331-6-252M, 715 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Registered owner
Trites Flying Service Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 1, 2005 · 464 hours before
Departed
Gillett, 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
50
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Seat
Center
Flight hours
18,738 total · 8,594 in this make and model

Weather

Conditions
Visual (VMC) · Day

FAA reports on this event · 1

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