MIA94LA108

NTSB accident investigation · Cessna 170 · Olive Branch, MS · March 29, 1994

Accident · No injuriesLimited investigationFinal report
Date
March 29, 1994, 15:45 local (21:45 UTC)
Place
Olive Branch, MS
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N2509VCessna 170
Weather
Visual (VMC) · Day
Status
Completed · report December 7, 1994
Report
Approved by Office Director
FAA report
19940329008349A
Case key
37518

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

Failure of the pilot-in-command to apply carburetor heat before reducing engine power to descend resulting in the partial loss of engine power due to carburetor ice. Contributing to the accident was the unsuitable terrain encountered during the forced landing and the carburetor icing weather conditions.

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(partial) - nonmechanicalDescent - normal
Weather condition - carburetor icing conditionsFactor
Fuel system,carburetor - ice
Carburetor heat - not usedPilot in commandCause
Forced landingDescent - emergency
On ground/water collision with objectLanding - roll
Object - tree(s)
Unsuitable terrain or takeoff/landing/taxi area - encounteredPilot in commandFactor
On ground/water collision with objectLanding - roll
Object - fence

Analysis

Before descending the pilot reduced the throttle but did not apply carburetor heat. After the descent the pilot applied throttle input but the engine did not respond. After touchdown in a field the airplane collided with trees and a fence. The FAA examined the airplane and reported that the right wing fuel tank and engine strainer contained a small quantity of water. The left wing fuel tank was impact damaged. According to an icing probability chart conditions were favorable for visible icing at rated power with a float type carburetor installed.

Factual narrative

On March 29, 1994, about 1545 central standard time, a Cessna 170, registered to C.P.T., Inc, was substantially damaged during a forced landing in a field about 5 miles east of the Olive Branch Airport, Olive Branch, Mississippi, while on a 14 CFR Part 91 personal flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The private-rated pilot and one passenger were not injured. The flight originated from the Olive Branch Airport about 1400.

The pilot stated that the flight was about 5 miles from the airport returning to land and before descending, he reduced the power only. After descending, he applied throttle to increase engine power but the engine did not respond. He attempted a forced landing in a field, and during the landing roll the airplane collided with trees and a fence.

Examination of the airplane by an FAA airworthiness inspector the following day revealed that the left wing fuel tank was damaged. The right wing fuel tank and gascolator which were not damaged were checked for fuel contamination; about 1/2 ounce of water was present in both. The fuel selector was in the "both" position and had not been moved from that position after engine start before departure.

According to an icing probability chart, conditions were favorable for visible icing at rated power with a float type carburetor installed.

Aircraft

Registration
N2509V
Reported as
Cessna 170
Category
Airplane
Serial number
18012
Airframe hours
3,183
Engine
Continental C-145-2, 145 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
C.P.T., Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 7, 1993 · 8 hours before

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
62
Certificate
Private
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,100 total · 60 in this make and model · 3,000 as pilot in command · 25 in the last 90 days · 10 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
230° at 8 knots
Visibility
12 statute miles
Lowest ceiling
None
Temperature
59 °F, dew point 30 °F
Altimeter
30.00 inHg
Observed at
MEM, 15 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.