SEA90FA133

NTSB accident investigation · Cessna 172M · Snoqualmie, WA · November 8, 1989

Accident · FatalField investigationFinal report
Date
November 8, 1989, 08:00 local (16:00 UTC)
Place
Snoqualmie, WA
Injuries
1 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N73422Cessna 172M
Weather
Instrument (IMC) · Day
Status
Completed · report June 26, 1992
Report
Approved by Office Director
FAA report
19891108066089A
Case key
41118

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

Intentional flight into known adverse weather conditions and poor weather evaluation by the pilot.

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.

In flight encounter with weatherClimb - to cruise
Weather condition - icing conditionsFactor
Flight into known adverse weather - intentionalPilot in commandCause
Weather evaluation - poorPilot in commandCause
In flight collision with objectManeuvering

Analysis

Shortly after takeoff on an IFR flight, the plt reported that the airplane was unable to climb to the assigned altitude due to the accumulation of ice. The plt was cleared to return to the originating arpt. En route, the airplane descended below the mda in mountainous terrain and radio and radar contact was lost. With the aid of another airplane to relay messages, the plt was given vectors in the direction to lower terrain. The plt reported that he was in IMC when communication was lost. The airplane was found 8 months later. During the investigation there were no noted mechanical failures or malfunctions.

Aircraft

Registration
N73422
Reported as
Cessna 172M
Category
Airplane
Serial number
17267446
Airframe hours
2,339
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Evergreen Flying Club, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 21, 1989 · 161 hours before
Departed
RNT · Renton, WA
Destination
MWH · Moses Lake, WA
Flight plan
IFR

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
52
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
4,856 total · 141 in this make and model · 3,815 as pilot in command · 5 in the last 90 days · 2 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Day
Wind
200° at 15 knots
Visibility
15 statute miles
Lowest ceiling
5,500 ft broken
Temperature
52 °F, dew point 45 °F
Altimeter
30.00 inHg
Observed at
SEA, 29 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.