SEA83FA018

NTSB accident investigation · Stinson 108-3 · Lynnwood, WA · November 13, 1982

Accident · FatalField investigationFinal report
Date
November 13, 1982, 15:40 local (23:40 UTC)
Place
Lynnwood, WA
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N6943MStinson 108-3
Weather
Visual (VMC) · Day
Status
Completed · report November 13, 1983
Report
Approved by Office Director
FAA report
19821113058409A
Case key
71523

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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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) - mech failure/malfManeuvering
Ignition system,magneto - fatigueCause
Ignition system,magneto - failure,totalCause
Forced landingLanding - flare/touchdown
In flight collision with objectLanding - flare/touchdown
Object - tree(s)Factor

Analysis

The eng failed approaching the arpt at low altitude. The acft struck trees during a descending turn toward a power company right-of-way. Investigation revealed that the impulse drive springs on both magnetos had failed in fatigue. The springs are not assigned a service life limit. Rejection criteria during magneto overhaul pertains to distortion of coil symmetry & obvious signs of wear. No record could be found of replacement of the magneto impulse springs. It is possible that they were original equipment dating to 1948.

Aircraft

Registration
N6943M
Reported as
Stinson 108-3
Category
Airplane
Serial number
4943
Airframe hours
325
Engine
Franklin 6A4-165-B3, 165 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Ward L. Miller
Registered owner
Ward L. Miller
Departed
S13 · Lynnwood, WA
Destination
S13 · Lynnwood, WA
Airport
S13 · Martha Lake

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
43
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Unknown, Valid Medical--no waivers/lim.
Flight hours
219 total · 93 in this make and model · 156 as pilot in command · 1 in the last 90 days · 1 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
30 statute miles
Temperature
39 °F

FAA reports on this event · 1

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