ERA16LA151

NTSB accident investigation · Granger Michael D Sonex · Jesup, GA · April 8, 2016

Accident · Serious injuriesLimited investigationFinal report
Date
April 8, 2016, 11:05 local (15:05 UTC)
Place
Jesup, GA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Emergency descent
Aircraft
N97GRGranger Michael D Sonex
Defining event
Emergency descent: Fuel exhaustion
Weather
Visual (VMC) · Day
Status
Completed · report April 13, 2020
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA
FAA report
20160408004509A
Case key
92974

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 pilot's improper fuel management, which resulted in fuel exhaustion and a total loss of engine power.

Findings · 3

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 managementGranger Michael D SONEX: 1 caseAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelGranger Michael D SONEX: 1 caseAll 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 private pilot had recently purchased the accident airplane and was planning a cross-country flight to an airport several hours away. Before departing, the pilot flew around the airport traffic pattern with the airplane's previous owner and received a briefing from the previous owner about its operation, fuel consumption, and endurance. Specifically, the previous owner advised him that he typically used 2 hours as a maximum flight leg time; the airplane had a 16-gallon fuel capacity and consumed about 6 gallons of fuel per hour, so a 2-hour flight leg would leave about 4 gallons of fuel remaining for about a 30-minute reserve. The previous owner advised the pilot that they had already used some fuel and that he likely would not have enough fuel to reach his intended destination airport, which was about 2 flight hours away, with an adequate fuel reserve. The pilot stated that he would look for a fuel stop before his intended destination and departed. The airplane subsequently impacted terrain while maneuvering in the vicinity of a runway at an airport just off the direct course between the departure airport and the intended destination airport. The airplane had been airborne for about 2 hours 26 minutes. Examination of the airplane at the accident site revealed that the fuel system was intact and absent of fuel. Further examination of the airplane's engine revealed no evidence of any preimpact mechanical malfunctions or failures that would have precluded normal operation. Given this information, it is likely that the pilot had exhausted the airplane's fuel supply, which resulted in a total loss of engine power and subsequent forced landing while attempting to reach the runway at the intermediate airport.

Factual narrative

On April 8, 2016, about 1105 eastern daylight time, an experimental amateur-built Sonex, N97GR, was substantially damaged during a forced landing while on approach to Wayne County Airport (JES), Jesup, Georgia. The private pilot was seriously injured. The personal flight was conducted under the provisions of 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed and no flight plan was filed for the cross-country flight that departed Vero Beach Municipal Airport (VRB) Vero Beach, Florida, at 0820.A family member stated that the pilot did not remember any of the events leading up to the accident nor did he remember any of the events after. The pilot had just purchased the airplane, and according to the airplane's previous owner, prior to the accident he examined the airplane with the pilot, and explained everything he knew about its operation, performance, and maintenance. On the day of the accident, the pilot and the previous owner conducted a preflight inspection and the pilot asked the owner to fly around the airport traffic pattern with him a few times. The previous owner stated that they conducted 3 stop-and-go landings at VRB. After the third landing, the pilot said that he was satisfied and ready to depart. The previous owner asked the pilot where he planned to stop for fuel, and he replied he planned to stop at Vidalia Regional Airport (VDI), Vidalia, Georgia, which was about 2 hours away. The previous owner advised him that he typically used 2 hours as a maximum flight leg time and that the airplane had a 16 gallon fuel capacity and consumed around 6 gallons of fuel per hour, and that generally 2 hour flight legs leave about 4 gallons of fuel remaining for at least a 30 minute reserve. The previous owner also pointed out that one should never rely completely on fuel gauges, no matter how accurate. He told the pilot that they had used some fuel during the flight that morning, and that he likely would not have enough to make VDI with an adequate reserve. The pilot said he realized that and would look for a fuel stop prior to VDI. Later that day, the JES airport manager received a report that an airplane had crashed adjacent runway 29. He confirmed the registration number and contacted the authorities. Vandalia Regional Airport was located about 290 nautical miles northwest of VRB. Wayne County Airport was located about 10 nautical miles northeast of a direct course line between VRB and VDI, and about 250 nautical miles from VRB. Postaccident examination of the airplane by a Federal Aviation Administration inspector revealed that the fuselage of the airplane was crushed. The cockpit section of the airplane was separated from the fuselage. The fuel system was not breached, and no fuel was discovered in the wing tanks or the header fuel tank. An examination of the engine revealed that there was impact damage on the bottom of the case. The engine mount was bent forward and was crushed against the flywheel. Thecarburetor was separated from the intake manifold, and the air filter was crushed. The oil system was intact, and the oil dipstick an oil quantity up to the fill mark. Due to impact damage the engine could not be test run. The spark plugs were removed, and the electrodes were gray in color. The crankshaft was rotated by hand and compression was observed on all cylinders. The valve covers were removed and when the crankshaft was rotated, valve train continuity was observed on all rocker arms. The distributors were not damaged, and the rotor turned when the distributor was rotated. Due to the magneto ring damage the distributors could not produce spark. The airplane was equipped with a MGL Avionics Stratomaster Ultra-X recorder monitoring system. Download and examination of the data from the unit revealed that it did not capture data relevant to the accident flight. The airplane was also equipped with an Appareo Stratus device , which began recording at VRB about 0816. The data showed that the airplane departed VRB about 0839 and proceeded uneventfully until the groundspeed reached near zero around 1104 while maneuvering over runway 6/24 at JES. Over the final 10 seconds of the flight, the recorded groundspeed decreased from about 75 knots to below 30 knots, and the GPS altitude decreased from about 250 to 0 feet.

Aircraft

Registration
N97GR
Reported as
Granger Michael D Sonex (NO SERIES)
Category
Airplane, amateur-built
Serial number
0611
Built
2006
Airframe hours
346
Engine
Jabiru 3300A, 107 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · March 25, 2016 · 6 hours before
Departed
VRB · Vero Beach Muni, FL
Destination
VDI · Vidalia, GA
Airport
JES · Wayne County Airport
Equipment
Electronic multifunction display, Data recorder

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
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Restraint
3-point
Flight hours
16 total · 3 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 11 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
73 °F, dew point 52 °F
Altimeter
29.92 inHg
Observed at
JES

Docket · 9

The files NTSB released with the investigation on November 29, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.9 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.