MKC89LA128

NTSB accident investigation · Waco UPF-7 · Creve Coeur, MO · June 6, 1989

Accident · No injuriesLimited investigationFinal report
Date
June 6, 1989, 17:30 local (22:30 UTC)
Place
Creve Coeur, MO
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N29309Waco UPF-7
Weather
Visual (VMC) · Day
Status
Completed · report April 19, 1990
Report
Approved by Office Director
Case key
34805

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

Improper use of the carburetor heat by the pilot and carburetor ice. Contributing factors were: carburetor icing conditions, high obstructions and terrain conditions (corn crop).

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) - nonmechanicalTakeoff - initial climb
Weather condition - carburetor icing conditionsFactor
Fuel system,carburetor - iceCause
Carburetor heat - improper use ofPilot in commandCause
Forced landingManeuvering - turn to landing area (emergency)
Terrain condition - high obstruction(s)Factor
In flight collision with terrain/waterLanding
Terrain condition - cropFactor

Analysis

The pilot reported that shortly after takeoff, after attaining an altitude of about 100 ft, the engine began losing power. He initiated a shallow right turn to avoid trees and to stay over the airport. However, the engine lost all power and an emergency landing was made in an adjacent corn field where the aircraft was substantially damaged. No preimpact mechanical malfunction or failure was found during the investigation. The temperature & dew point were 81 and 50 degrees, respectively. According to icing probability charts, conditions were conducive to carburetor icing.

Aircraft

Registration
N29309
Reported as
Waco UPF-7
Category
Airplane
Serial number
5336
Airframe hours
2,556
Engine
Continental W-670-6N, 220 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Rwm Enterprises,Inc.
Registered owner
Rwm Enterprises Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 11, 1988 · 46 hours before
Departed
1H0
Airport
1HO · Creve Coeur, runway 25, 3,020 × 175 ft, grass/turf

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
44
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Rear
Flight hours
1,431 total · 52 in this make and model · 1,246 as pilot in command · 34 in the last 90 days · 8 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
190° at 7 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
81 °F, dew point 50 °F
Altimeter
29.00 inHg
Observed at
SUS, 8 nm away