CEN16LA180

NTSB accident investigation · Grumman Acft ENG Cor-Schweizer G 164B · Lyons Point, LA · May 11, 2016

Accident · Minor injuriesLimited investigationFinal report
Date
May 11, 2016, 14:00 local (19:00 UTC)
Place
Lyons Point, LA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8362KGrumman Acft ENG Cor-Schweizer G 164B
Defining event
Maneuvering-low-alt flying: Fuel contamination
Weather
Visual (VMC) · Day
Status
Completed · report October 6, 2016
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20160511005669A
Case key
93155

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

A total loss of engine power due to debris contamination of the fuel system. Contributing to the accident was the pilot's inadequate preflight inspection.

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.

Fluids: fuelAircraft › Fluids/misc hardware · Fluid conditionGrumman Acft ENG Cor-Schweizer G-164B: 3 casesAll aircraft: 1,695 casesProbable cause
Fuel systemAircraft › Aircraft systems · Related operating infoGrumman Acft ENG Cor-Schweizer G-164B: 1 caseAll aircraft: 181 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Inadequate inspectionGrumman Acft ENG Cor-Schweizer G-164B: 3 casesAll aircraft: 1,695 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 departed for the seventh of fifteen planned aerial application flights that day; the engine subsequently lost total power. The pilot conducted a forced landing to a rice field. A fuel sample drained from the airplane following the accident was cloudy and contained floating debris. Postaccident examination of the fuel system revealed a significant amount of debris, including grass, leaves, insects, and dirt, in the fuel control filter and airframe filter bowl. Further examination of the fuel filter assembly revealed that the inlet and outlet holes of the filter housing, as well as the filter inlet hose, contained debris of sufficient quantity to result in a disruption of fuel flow to the engine. Whether the pilot conducted a preflight inspection could not be determined; however, a fuel sample taken prior to the flight would likely have displayed contamination.

Factual narrative

On May 11, 2016, about 1400 central daylight time, a Grumman G-164B AgCat airplane, N8362K, made a forced landing in a field near Lyons Point, Louisiana. The commercial rated pilot was not injured and the airplane sustained substantial damage. The airplane was registered to and operated by Vincent Flying Service, Inc., Kaplan, Louisiana, under the provisions of 14 Code of Federal Regulations Part 137 as an aerial application flight. Visual meteorological conditions prevailed at the time of the accident and no flight plan was filed. The local flight had just departed from a private air strip. The pilot reported that he was conducting his seventh aerial application job of the day and this particular job involved fifteen total application loads. On the accident flight he had just departed the private strip which was the seventh load and the airplane had been loaded with about 60 gallons of fuel and the hopper contained about 2,000 lbs of applicant. When the airplane was above the height of a telephone pole (50 to 75 ft) and with no prior indications, the engine experienced a total loss of power and the pilot made a forced landing to a rice field. During the landing roll, the left main landing gear broke and the airplane continued onto a farm road. After the airplane came to rest, smoke was observed from the engine compartment and fuel was leaking from the fuel tanks. The responding Federal Aviation Administration (FAA) inspector reported that there was fuel on the ground near the breached fuel tank and there was corrosion around the fuel tank inlet cap. About 9 gallons of fuel were recovered from the fuel tanks; 7 gallons in the left tank and 2 gallons in the right tank. An examination of the fuel control filter revealed that the fuel was cloudy and contained floating debris. The paper filter was discolored and contained debris. The airframe fuel filter bowl contained a significant amount of debris including leaves, grass, insects, and dirt. The right fuel tank and associated fuel screens were clear of any debris. A review if the airplane maintenance records revealed that an annual inspection was completed on November 1, 2015, and a 100-hour inspection was completed on February 15, 2016.

Aircraft

Registration
N8362K
Reported as
Grumman Acft ENG Cor-Schweizer G 164B (B)
Category
Airplane
Serial number
662B
Built
1981
Airframe hours
11,936.1
Engine
Pratt & Whitney PT6A-34, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Vincent Flying Service Inc
Registered owner
Vincent Flying Service Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · February 15, 2016 · 6,565 hours before
Departed
Lyons Point, LA
Destination
Lyons Point, LA
Airport
--- · Merrit Landing Strip

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
31
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
February 13, 2015
Seat
Single
Restraint
4-point
Flight hours
4,560 total · 4,560 as pilot in command · 200 in the last 90 days · 100 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 12 knots
Visibility
10 statute miles
Lowest ceiling
5,000 ft broken
Temperature
82 °F, dew point 73 °F
Altimeter
30.06 inHg
Observed at
KIYA, 17 nm away

Docket · 3

The files NTSB released with the investigation on July 14, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.4 MB in all.

FAA reports on this event · 1

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