FTW99LA180

NTSB accident investigation · Bellanca BL17-30A · Brownfield, TX · July 6, 1999

Accident · Minor injuriesLimited investigationFinal report
Date
July 5, 1999, 19:00 local (Jul 6, 1999, 00:00 UTC)
Place
Brownfield, TX
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N9520EBellanca BL17-30A
Weather
Visual (VMC) · Day
Status
Completed · report December 4, 2000
Report
Approved by Office Director
FAA report
19990705008279A
Case key
46703

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 inadvertent stall while attempting to clear powerlines. Factors were the loss of engine power due to fuel starvation and the pilot's improper use of the fuel tank selector.

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 power(total) - nonmechanicalApproach - vfr pattern - final approach
Fluid,fuel - starvationFactor
Fuel tank selector position - improperPilot in commandFactor
Checklist - not followedPilot in command
Forced landingEmergency descent/landing
Loss of control - in flightEmergency descent/landing
Object - wire,transmission
Maneuver to avoid obstructions - performedPilot in command
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The airplane stalled as the pilot pulled up to clear powerlines following a loss of engine power on final approach. The left wing of the airplane dropped abruptly, and the airplane nosed down impacting the ground in a left wing low attitude, approximately 100 yards short of the landing threshold. The pilot estimated that he had approximately 40 gallons of fuel prior to departing on the 35-nautical mile flight. The pilot reported to a local law enforcement officer that the engine lost power on final approach and 'he was not quick enough to switch the fuel selector to the other tank.' Examination of the fuel system by an FAA inspector revealed that the airplane was equipped with an extended range fuel system which encompassed a total of 7 fuel cells, with 3 cells in each wing and a fuselage tank aft of the baggage compartment. Most of the fuel cells were compromised during impact and evidence of spilled fuel was found on the ground.

Factual narrative

On July 5, 1999, at 1900 central daylight time, a Bellanca BL17-30A airplane, N9520E, was substantially damaged when it collided with terrain while on final approach to the Terry County Airport, near Brownfield, Texas. The non-instrument rated private pilot, sole occupant of the airplane, sustained minor injuries. The airplane was registered to and operated by the pilot. Visual meteorological conditions prevailed for the Title 14 CFR Part 91 personal flight. The 35-nautical mile flight originated from the Lubbock International Airport, near Lubbock, Texas, approximately 1845.

The pilot reported to a local law enforcement officer, who responded to the accident site, that the engine lost power on final approach, and "he was not quick enough to switch the fuel selector to the other tank." The officer reported that the wing tanks were compromised during impact with the ground, and he found evidence that some fuel spilled on the ground.

A pilot, who witnessed the accident at the Terry County Airport, stated that he observed the airplane stall as it cleared the powerlines at the approach end of runway 20. The witness reported that "the left wing of the airplane dropped abruptly and the airplane nosed down impacting the ground in a left wing low attitude, approximately 100 yards short of the landing threshold."

Examination of the airplane by the airport manager revealed that both wings were "destroyed by the impact with the ground." Additionally, the 3-bladed propeller separated from the engine. There was no fire.

Examination of the fuel system by an FAA inspector revealed that the airplane was equipped with an extended range fuel system which encompassed a total of 7 fuel cells. There were 3 cells in each wing and a fuselage tank aft of the baggage compartment.

In the recommendation block of the enclosed NTSB Form 6120.1/2, the pilot stated that the accident could have been prevented by "better fuel management" and "better attention to all gauges (fuel pressure, manifold pressure) to possibly be aware sooner of a possible problem." The pilot further stated that he estimated that he had approximately 40 gallons of fuel aboard the airplane prior to his departure from Lubbock.

Aircraft

Registration
N9520E
Reported as
Bellanca BL17-30A
Category
Airplane
Serial number
76-30805
Airframe hours
2,534
Engine
Continental IO-520-D, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Paul M. Willis
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 14, 1998 · 54 hours before
Departed
LBB · Lubbock, TX
Destination
Q26
Airport
Q26 · Terry County Airport, runway 20, 5,218 × 75 ft, asphalt

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
29
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
278 total · 192 in this make and model · 22 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 17 knots, gusting 23
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 61 °F
Altimeter
30.00 inHg
Observed at
LBB, 35 nm away

FAA reports on this event · 1

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