ATL91FA084

NTSB accident investigation · Cessna 172N · Dunlap, TN · April 20, 1991

Accident · FatalField investigationFinal report
Date
April 20, 1991, 09:30 local (14:30 UTC)
Place
Dunlap, TN
Injuries
2 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N5738JCessna 172N
Weather
Instrument (IMC) · Day
Status
Completed · report March 24, 1993
Report
Approved by Office Director
FAA report
19910420011649A
Case key
8320

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

The pilot-in-command's inadequate preflight planning/preparation, his attempted VFR flight into IFR conditions, and his subsequent failure to maintain a proper altitude. Factors in the accident were: the mountainous terrain, the foggy, low ceiling conditions along the route of flight.

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 weatherCruise - normal
Terrain condition - mountainous/hillyFactor
Weather condition - low ceilingFactor
Weather condition - fogFactor
Preflight planning/preparation - inadequatePilot in commandFactor
Vfr flight into imc - attemptedPilot in commandCause
Proper altitude - not maintainedPilot in commandCause
In flight collision with terrain/waterCruise - normal

Analysis

The instrument-rated pilot and pilot-rated passenger were on a personal flight to a vfr-only airport. Their flight required them to cross over a mountain ridge en route. Low ceilings, with light drizzle and fog, were reported near their destination airport. Witnesses on top of the mountain ridge heard the drone of an engine getting closer until a crash was heard. A witness who was first on the scene reported that forward visibility on the ridge was about 75 yards. Investigation revealed that the airplane impacted the side of the ridge on a direct heading to the destination airport. The damage indicated a level flight path, with wings level. The pilot did not file a flight plan, did not activate one en route, and had no voice communications with ATC. No evidence of mechanical failure or malfunction was found.

Aircraft

Registration
N5738J
Reported as
Cessna 172N
Category
Airplane
Serial number
17273830
Airframe hours
1,283
Engine
Lycoming O-320-H2AD, 160 horsepower, reciprocating
Damage
Destroyed
Flight
Personal · Part 91
Operator
Imperial Fabricating Company
Registered owner
Imperial Fabricating Company
Last inspection
100 hour · July 3, 1990 · 50 hours before
Departed
1M5 · Portland, TN
Destination
IAO · Chattanooga, TN

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
45
Certificate
Commercial
Airplane ratings
Single-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
8,736 total · 8,543 as pilot in command

Weather

Conditions
Instrument (IMC) · Day
Wind
350° at 8 knots
Visibility
1 statute miles
Lowest ceiling
700 ft overcast
Temperature
57 °F, dew point 55 °F
Altimeter
29.00 inHg
Observed at
CHA, 21 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.