CEN19LA101

NTSB accident investigation · Cessna 150 · Granite Shoals, TX · March 6, 2019

Accident · Minor injuriesClass 3 · LimitedFinal report
Date
March 6, 2019, 13:00 local (19:00 UTC)
Place
Granite Shoals, TX
Injuries
1 minor, 2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6917FCessna 150
Defining event
Initial climb: Fuel starvation
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20190306000949A
Case key
99122

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 decision to takeoff with a limited amount of fuel onboard, which unported during a turn, resulting in fuel starvation and a subsequent loss of engine power.

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.

Planning/preparation: fuel planningPersonnel issues › Task performance · PilotCessna 150F: 12 casesAll aircraft: 719 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelCessna 150F: 13 casesAll aircraft: 1,695 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Not serviced/maintainedCessna 150F: 13 casesAll aircraft: 1,695 cases
Fuel system: fuel distributionAircraft › Aircraft systems · Capability exceededCessna 150F: 2 casesAll aircraft: 141 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 reported that he last fueled the airplane about 5 months before the accident. Before the flight, the pilot conducted a preflight inspection and sumped both wing fuel tanks. The left fuel tank had some sediment present, but as he continued sumping the fuel became clear. The fuel in the right fuel tank ran clear. After engine start, the left tank fuel gauge indicated near empty, and the right fuel tank gauge indicated about 1/4 full. Subsequently, the pilot took off for a personal cross-country flight. After starting a right turn, and about 600 ft above ground level, the engine sputtered and lost power. The pilot then attempted to turn back to the airport but realized that the airplane was too low, so he executed a forced landing to a field with small trees, during which the left wing struck a tree, which resulted in substantial damage to the wing. The pilot reported that, after the accident, he found more sediment in the left tank. He stated that he believed that the low fuel state and the sediment in the left tank may have starved the engine of fuel during the turn and that having more fuel onboard would have “probably been helpful.” However, it is more likely that, due to the low fuel state, when the pilot conducted the right turn, the fuel became unported, resulting in the loss of engine power due to fuel starvation.

Factual narrative

On March 6, 2019, about 1300 central standard time, a Cessna 150F, N6917F, was substantially damaged when it impacted terrain during a forced landing near Granite Shoals/Bob Sylvester Airpark (2G5), Granite Shoals, Texas. The pilot and 1 child passenger were not injured and another child passenger sustained minor injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot reported that the flight's purpose was to reposition the aircraft to San Marcos, Texas, to conduct an annual inspection. The pilot recalled that he last refueled the airplane in October of 2018 with about 8 gallons, about 5 months prior to the accident flight. Prior to the flight, the pilot conducted a preflight inspection and sumped both wing fuel tanks. The left fuel tank was virtually empty and had some sediment present, but then became clear. The right fuel tank sump was clear. After engine start, the left fuel tank gauge indicated near empty, and right fuel tank gauge indicated about 1/4 full. The pilot stated that he started a right turn after takeoff, and about 600 ft above the ground, the engine sputtered and lost power. The pilot then attempted to turn back to the airport but realized that he was too low. He executed a forced landing to a field vegetated with small trees. During the forced landing, the left wing struck a small mesquite tree and spun the airplane around 180-degrees, resulting in substantial damage to the left wing. The pilot and two children passengers (6 and 4 years old) exited the airplane. The airplane was not equipped with child safety seating. After the accident, the pilot reported that he discovered more sediment remaining in the left tank. The pilot reported on the NTSB Form 6120 that he believes that the low fuel state and sediment in left tank may have starved the engine during first turn when gravity pulled from left tank, and that more fuel on board would have probably been helpful.

Aircraft

Registration
N6917F
Reported as
Cessna 150 (F)
Category
Airplane
Serial number
15063517
Built
1966
Airframe hours
4,561
Engine
Continental O-200 SERIES, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 20, 2016 · 30 hours before
Departed
2G5 · Granite Shoals, TX
Destination
HYI · San Marcus, TX
Airport
2G5 · Granite Shoals Airport
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
42
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Seat
Left
Restraint
Lap only
Flight hours
200 total · 100 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 9 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 39 °F
Altimeter
29.70 inHg
Observed at
AUS, 55 nm away

Docket · 3

The files NTSB released with the investigation on April 21, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.6 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.