WPR25LA168

NTSB accident investigation · Aeronca 7BCM · Port Townsend, WA · June 2, 2025

Accident · No injuriesClass 4 · LimitedFinal report
Date
June 2, 2025, 11:30 local (18:30 UTC)
Place
Port Townsend, WA · airport environment
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N85311Aeronca 7BCM
Defining event
Landing: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report October 2, 2025
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
200263

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 flight instructor’s delayed remedial action and inadequate compensation for shifting wind conditions which resulted in a veer off the runway and collision with a sign.

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.

Action: delayed actionPersonnel issues › Action/decision · Instructor/check pilotAeronca 7BCM: 1 caseAll aircraft: 894 casesProbable cause
Wind: sudden wind shiftEnvironmental issues › Conditions/weather/phenomena · Ability to respond/compensateAeronca 7BCM: 2 casesAll aircraft: 114 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · Instructor/check pilotAeronca 7BCM: 11 casesAll aircraft: 9,295 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 flight instructor stated that they had completed two landings and had configured the airplane for a third full-stop landing. With the student pilot manipulating the controls, the airplane touched down on the centerline in a three-point landing attitude. Shortly after touchdown, the airplane began veering to the left and the flight instructor assumed control of the airplane. Despite her attempts, the airplane continued off the runway surface and the left landing gear collided with a sign. As a result of the collision, the left wing strut was damaged. The flight instructor noted that the wind was reported as light and variable. During the accident landing, the wind had shifted to a 180° tailwind of approximately 10 knots, initiating the left veer off the runway.

Aircraft

Registration
N85311
Reported as
Aeronca 7BCM
Category
Airplane
Serial number
7AC4050
Built
1946
Airframe hours
351
Engine
Cont Motor C85-12, 85 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 30, 2025
Departed
0S9 · Port Townsend, WA
Destination
Same as departure
Airport
0S9 · Jefferson County Intl, runway 09/27, 3,000 × 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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
56
Injuries
None
Certificates
Airline transport, Commercial, Flight instructor
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
October 22, 2025
Seat
Rear
Restraint
4-point
Flight hours
12,000 total · 100 in this make and model · 8,000 as pilot in command · 10 in the last 90 days · 5 in the last 30 days · 1 in the last 24 hours
Role
Student pilot
Age
39
Injuries
None
Certificate
Student
Seat
Front
Restraint
4-point
Flight hours
15 total · 15 in this make and model · 10 in the last 90 days · 5 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 45 °F
Altimeter
30.27 inHg
Observed at
KTIW
METAR
KTIW 021853Z VRB04KT 10SM CLR 17/07 A3027 RMK AO2 SLP250 T01670067

Docket · 2

The files NTSB released with the investigation on October 2, 2025, on NTSB’s docket system: statements, records, photos and specialists’ reports. 24.6 MB in all.