GAA17CA305

NTSB accident investigation · Grumman Acft ENG Cor-Schweizer G-164 · Maxwell, CA · May 26, 2017

Accident · Serious injuriesData collectionFinal report
Date
May 26, 2017, 13:15 local (20:15 UTC)
Place
Maxwell, CA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N6674KGrumman Acft ENG Cor-Schweizer G-164
Defining event
Maneuvering-low-alt flying: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report August 3, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA/ FSDO
FAA report
20170526007849A
Case key
95245

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 pilot's failure to visually check the fuel quantity during the preflight inspection and ensure that sufficient fuel was onboard for the flight, which resulted in a total loss of engine power due to fuel exhaustion.

Findings · 5

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 levelGrumman Acft ENG Cor-Schweizer G-164C: 2 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Inadequate inspectionGrumman Acft ENG Cor-Schweizer G-164C: 2 casesAll aircraft: 1,695 casesProbable cause
TerrainEnvironmental issues › Physical environment · Contributed to outcomeGrumman Acft ENG Cor-Schweizer G-164C: 1 caseAll aircraft: 267 cases

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 reported that, a few minutes after takeoff for an agricultural application flight, while maneuvering to a field he intended to spray, the engine lost power and that he then attempted to land on a dirt road. He added that the airplane bounced on touchdown and "went off the road and struck a ditch." He further added that when the engine lost power, the fuel gauge indicated about half full. Postaccident, the pilot reported that the fuel gauge was "stuck in the middle," that he did not visually check the fuel quantity before flight, and that he had exhausted the fuel supply. The fuselage and both wings sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The Federal Aviation Administration Pilot's Handbook of Aeronautical Knowledge stated, in part: Fuel Gauges The fuel quantity gauges indicate the amount of fuel measured by a sensing unit in each fuel tank and is displayed in gallons or pounds. Aircraft certification rules require accuracy in fuel gauges only when they read "empty." Any reading other than "empty" should be verified. Do not depend solely on the accuracy of the fuel quantity gauges. Always visually check the fuel level in each tank during the preflight inspection, and then compare it with the corresponding fuel quantity indication.

Factual narrative

The pilot reported that a few minutes after takeoff during an aerial application flight, while maneuvering to a field he intended to spray, the engine lost power and he attempted to land on a dirt road. He added that the airplane bounced on touchdown and "went off the road and struck a ditch." He further added that when the engine lost power, the fuel gauge indicated about half full. Postaccident, the pilot reported that the fuel gauge was "stuck in the middle", he did not visually check the fuel quantity prior to flight, and had exhausted the fuel supply. The fuselage and both wings sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The Federal Aviation Administration Pilot's Handbook of Aeronautical Knowledge stated in part: Fuel Gauges The fuel quantity gauges indicate the amount of fuel measured by a sensing unit in each fuel tank and is displayed in gallons or pounds. Aircraft certification rules require accuracy in fuel gauges only when they read "empty." Any reading other than "empty" should be verified. Do not depend solely on the accuracy of the fuel quantity gauges. Always visually check the fuel level in each tank during the preflight inspection, and then compare it with the corresponding fuel quantity indication.

Aircraft

Registration
N6674K
Reported as
Grumman Acft ENG Cor-Schweizer G-164 (C)
Category
Airplane
Serial number
16C
Built
1978
Airframe hours
10,113.9
Engine
Honeywell TPE-331-6-5AM, 1,000 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Richter Aviation Inc
Registered owner
Richter Aviation Inc
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 7, 2017
Departed
Develan, CA
Destination
Develan, CA
Equipment
None

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
55
Injuries
Serious
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Waiver time limited special
Last flight review
April 29, 2016
Seat
Single
Restraint
4-point
Flight hours
7,170.7 total · 3,485 in this make and model · 7,116.5 as pilot in command · 205 in the last 90 days · 205 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F
Observed at
NONE

Docket · 5

The files NTSB released with the investigation on July 13, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 8.3 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.

Other investigations on N6674K · 3

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