DEN86FA092

NTSB accident investigation · Cessna 177 · Anaconda, MT · March 6, 1986

Accident · FatalField investigationFinal report
Date
March 6, 1986, 10:45 local (17:45 UTC)
Place
Anaconda, MT
Injuries
3 fatal, 1 serious
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N3476TCessna 177
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860306005669A
Case key
16810

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

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) - nonmechanicalCruise - normal
Fluid,fuel - contaminationCause
Aircraft service - improperPilot in commandCause
Fluid,water - frozenCause
Fluid,fuel - improperCause
Forced landingDescent - emergency
In flight collision with objectDescent - emergency
Object - tree(s)Factor
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - mountainous/hillyFactor
Terrain condition - none suitableFactor

Analysis

The sole surviving pax said the eng lost power during cruise flight over mountainous terrain. The plt attempted a forced landing but hit a tree and the acft crashed. Aprx 5 gals of automotive fuel were drained from wing tank. Fuel sample taken from plt's storage tank revealed some water contamination. Acft had been operating at 9000 ft MSL in below freezing temp for aprx 1 hr, 5 mins. Eng disassembly revealed no evidence of failure. Carburetor bowl was clean, dry, and absent of fuel.

Aircraft

Registration
N3476T
Reported as
Cessna 177
Category
Airplane
Serial number
177-00776
Airframe hours
1,811
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Registered owner
Everet W. Mckenzie
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 20, 1985 · 1 hours before
Departed
THM · Thompson Falls, MT
Destination
JAC · Jackson Hole, WY
Flight plan
VFR

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
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
261 total · 75 in this make and model · 209 as pilot in command · 10 in the last 90 days · 3 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
40 statute miles
Lowest ceiling
None
Temperature
46 °F, dew point 27 °F
Altimeter
30.00 inHg
Observed at
MSO, 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.