CEN22LA003

NTSB accident investigation · Boeing PT-17 · Winnie, TX · October 2, 2021

Accident · Minor injuriesClass 4 · LimitedFinal report
Date
October 2, 2021, 11:05 local (16:05 UTC)
Place
Winnie, TX
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N4106YBoeing PT-17
Defining event
Initial climb: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA FSDO
FAA report
20211002016619A
Case key
104041

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 from a road with obstacles in his flight path and his failure to maintain control of the airplane when encountering changing winds from approaching thunderstorms which resulted in the airplane impacting signal light cables.

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.

Action: unnecessary actionPersonnel issues › Action/decision · PilotBoeing PT-17: 1 caseAll aircraft: 52 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotBoeing PT-17: 2 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedBoeing PT-17: 2 casesAll aircraft: 809 casesProbable cause
Wind: downdraftEnvironmental issues › Conditions/weather/phenomena · Effect on equipmentBoeing PT-17: 1 caseAll aircraft: 178 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 while taking off from a road, the airplane encountered a sudden wind shift which after becoming airborne caused the airplane to settle. As the airplane approached power lines above a road signal light and cables, the pilot decided to fly under the power lines. During the descent, the airplane impacted the signal light cables. The airplane yawed to the left, struck the ground, and nosed over into a ditch on the side of the road coming to rest inverted. The airplane sustained substantial damage to the wings and fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. In his NTSB Form 6120.1, the pilot reported that he put pressure on himself to fly the airplane to shelter due to approaching thunderstorms and would not recommend second guessing any approaching weather conditions. He stated that the abrupt wind changes from possible downdrafts were factors in the airplane’s inability to clear the obstacles in its flight path.

Aircraft

Registration
N4106Y
Reported as
Boeing PT-17
Category
Airplane
Serial number
75-7018
Built
1942
Airframe hours
4,035
Engine
Cont Motor W670 SERIES, 220 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · August 5, 2021

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
Minor
Certificate
Private
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
November 1, 2020
Seat
Rear
Restraint
3-point
Flight hours
2,800 total · 317 in this make and model · 10 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 5 knots
Visibility
10 statute miles
Lowest ceiling
7,000 ft broken
Temperature
82 °F, dew point 75 °F
Altimeter
30.06 inHg
Observed at
KBMT, 17 nm away
METAR
KBMT 021555Z AUTO 11005KT 10SM BKN070 OVC085 28/24 A3006 RMK AO2 LTG DSNT SW T02810242

Docket · 2

The files NTSB released with the investigation on November 16, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.8 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.