CEN09CA148

NTSB accident investigation · Cessna 172 · Union Mills, IN · February 1, 2009

Accident · No injuriesData collectionFinal report
Date
February 1, 2009, 12:30 local (17:30 UTC)
Place
Union Mills, IN
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N53576Cessna 172
Defining event
Approach-VFR go-around: Collision with terr/obj (non-CFIT)
Weather
Visual (VMC) · Day
Status
Completed · report April 28, 2011
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20090201001429A
Case key
73304

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 certificated flight instructor's failure to follow correct engine clearing procedures. A factor was the unsuitable landing area.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Planning/preparationPersonnel issues › Task performance · Instructor/check pilotCessna 172S: 1 caseAll aircraft: 113 casesProbable cause
Action: delayed actionPersonnel issues › Action/decision · PilotCessna 172S: 30 casesAll aircraft: 894 casesProbable cause
Performance/control parameters: powerplant parametersAircraft › Aircraft oper/perf/capability · Not specifiedCessna 172S: 1 caseAll aircraft: 81 casesProbable cause
Runway/land/takeoff/taxi surface: snow/slush/ice covered surfaceEnvironmental issues › Physical environment · Effect on equipmentCessna 172S: 6 casesAll aircraft: 219 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The certificated flight instructor (CFI) and student pilot departed on an introductory instructional flight towards a training area where they performed basic flight maneuvers. They then flew to an airport where the CFI demonstrated a simulated forced landing which was to be followed by a go-around to a runway that was reportedly covered with about 12-14 inches of snow. During the demonstration, the CFI reduced engine power to idle from an altitude of 2,000 feet mean sea level and executed a descent to an altitude of about 5 - 6 feet above ground level at 60 knots indicated airspeed. The CFI did not increase engine throttle during this descent to clear the engine. The CFI applied full throttle during the go-around, but the engine hesitated and the airplane continued to descend. The main landing gear wheels followed by the airplane's nose contacted the snow. The left wing contacted the ground followed by the right wing.. Both wings buckled, resulting in substantial damage to the airplane. The Federal Aviation Administration Flight Training Handbook states in the section under 'Descents (Maximum Distance Glides)' that during power-off descents, the engine should be cleared periodically to prevent excessive cooling and fouling.

Factual narrative

A flight instructor and student pilot departed on an introductory instructional flight towards a training area where they performed basic flight maneuvers. They then flew to Flying U Ranch Airport, Union Mills, Indiana, where the flight instructor demonstrated a simulated forced landing which was to be followed by a go-around to runway 18 (2,745 feet by 100 feet, grass). The runway was reportedly covered with about 12-14 inches of snow. During the demonstration, the flight instructor reduced engine power to idle from an altitude of 2,000 feet mean sea level and executed a descent to an altitude of about 5 - 6 feet above ground level at 60 knots indicated airspeed. The flight instructor did not increase engine throttle during this descent to "clear the engine." The flight instructor applied full throttle during the go-around, but the engine hesitated and the airplane continued to descend. The main landing gear wheels followed by the airplane nose contacted the snow. The left wing followed by the right wing then contacted the ground. Both wings buckled from the ground contact resulting in substantial damage to the airplane. The flight instructor accumulated a total flight time of 2,163 hours as an instructor.

Aircraft

Registration
N53576
Reported as
Cessna 172 (S)
Category
Airplane
Serial number
172S9398
Airframe hours
3,136
Engine
Lycoming IO360, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
J.S. Aviation Inc., doing business as Eagle Aircraft
Registered owner
Aerogramm LLC
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
100 hour · October 24, 2008
Departed
VPZ · Valparaso, IN
Destination
VPZ · Valparaso, IN
Flight plan
Unknown
Airport
4C1 · Flying U Ranch, runway 18, 2,745 × 100 ft, snow

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
67
Injuries
None
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
October 10, 2008
Seat
Right
Flight hours
3,204 total · 1,568 in this make and model · 2,991 as pilot in command · 59 in the last 90 days · 10 in the last 30 days
Role
Student pilot
Age
52
Injuries
None
Medical
Unknown
Seat
Left

Weather

Conditions
Visual (VMC) · Day
Wind
220° at 9 knots
Visibility
10 statute miles
Lowest ceiling
10,000 ft broken
Temperature
36 °F, dew point 25 °F
Altimeter
29.92 inHg
Observed at
VPZ

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.