FTW91LA024

NTSB accident investigation · Cessna 152 · Gilmer, TX · December 10, 1990

Accident · Minor injuriesLimited investigationFinal report
Date
December 10, 1990, 08:20 local (14:20 UTC)
Place
Gilmer, TX
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N68776Cessna 152
Weather
Visual (VMC) · Day
Status
Completed · report February 12, 1993
Report
Approved by Office Director
FAA report
19901210053419A
Case key
23298

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

A power loss due to the pilot's improper use of carburetor heat.

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
Fuel system,carburetor - iceCause
Carburetor heat - improper use ofPilot in commandCause
Forced landingDescent - emergency
In flight collision with objectDescent - emergency
Object - tree(s)
In flight collision with terrain/waterDescent - uncontrolled

Analysis

The commercial pilot and his passenger were maneuvering at 700 feet MSL while on a pipeline patrol aerial observation flight, when the engine started running rough. The pilot applied full carburetor heat as he started to turn to an open field. The engine stopped running and the pilot established an emergency descent to an open pasture. The airplane was not able to clear the 20 to 30 feet trees adjacent to the open pasture and the unsuccessful forced landing terminated with the airplane sustaining substantial damage after impacting the trees. The pilot told the FAA inspector that he normally flew with the carburetor heat partially open. The pilot's improper use of carburetor heat induced the formation of carburetor ice which caused the loss of engine power.

Aircraft

Registration
N68776
Reported as
Cessna 152
Category
Airplane
Serial number
15282370
Engine
Lycoming O-235-L2C, 110 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial observation · Part 91
Operator
Barr Air Patrol, Inc.
Departed
07F · Longview, TX

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
59
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Flight hours
11,800 total

Weather

Conditions
Visual (VMC) · Day
Wind
110° at 4 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
34 °F, dew point 30 °F
Observed at
GGG, 23 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.