CHI96LA136

NTSB accident investigation · Cessna 172N · Middleton, WI · April 21, 1996

Accident · No injuriesLimited investigationFinal report
Date
April 21, 1996, 13:45 local (18:45 UTC)
Place
Middleton, WI
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N739BNCessna 172N
Weather
Visual (VMC) · Day
Status
Completed · report July 3, 1996
Report
Approved by Office Director
FAA report
19960421007969A
Case key
10231

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 to maintain directional control of the airplane during the landing, which resulted in an inadvertent ground swerve. Factors relating to the accident were: the gusty crosswind condition, the pilot's excessive lowering of flaps, and the encounter with soft terrain.

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 control - on ground/waterLanding
Weather condition - crosswindFactor
Weather condition - gustsFactor
Lowering of flaps - excessivePilot in commandFactor
Directional control - not maintainedPilot in commandCause
Ground loop/swerve - inadvertentPilot in command
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - softFactor
Nose overLanding

Analysis

On final approach to runway 12, the pilot selected 30 degrees of flaps and maintained 65 knots indicated airspeed. The pilot used right aileron and opposite rudder on final. He said the airplane required constant adjustments to the flight controls to hold the extended centerline. He stated that his touchdown was a bit hard and left of centerline. The airplane exited the left side of the runway and nosed over after encountering soft mud. The pilot said that on the landing roll, he did not maintain directional control as aggressively as he did on final approach, and that he should have used less than 30 degrees of flaps. A weather station reported winds from 170 degrees at 13 knots with gusts to 18 knots.

Factual narrative

On April 21, 1996, at 1345 central daylight time, a Cessna 172N, N739BN, registered to the Capitol City Flyers, Inc., of Marshall, Wisconsin, and operated by a private pilot, ran off runway 12 (2971' x 38' dry/asphalt) after experiencing a crosswind on touchdown at Morey Airport, Middleton, Wisconsin. The airplane sustained substantial damage when it nosed over. The pilot and two passengers reported no injuries. The personal 14 CFR Part 91 flight was operating in visual meteorological conditions. No flight plan was on file. The flight departed Madison, Wisconsin, at 1335 cdt.

According to the pilot's written statement, he entered the traffic pattern at Morey Airport for the purpose of picking up his fourth passenger. On final approach to runway 12, the pilot selected 30 degrees of flaps with an indicated airspeed of 65 knots. The pilot used right aileron and opposite rudder to hold the extended centerline. He said the airplane required constant adjusting of the flight controls to maintain extended centerline. The pilot stated, "Touchdown was a bit hard and slightly left of the center. On the roll out the left main tire came off the runway. I attempted to gently steer back to the runway. I was concerned about over correcting the aircraft into a ground roll." The airplane exited the runway to the left and sank in the soft mud shoulder on the side of the runway. The airplane nosed over and came to rest on its back.

The pilot listed his lessons learned; "1. For a crosswind landing, flaps should have been set at less than 30 degrees. 2. Although I aim all landings for the centerline mark, I did not adequately consider my reduced safety margin at Rwy 12 Morey(38' wide). 3. Maintain the directional control as aggressively on the roll out as on final approach".

The Madison Automatic Weather Observation Station (AWOS) located 8 miles to the east of the Airport, reported winds from 170 degrees at 13 knots with gusts to 18 knots, 11 minutes after the accident.

The Cessna 172N Pilot Operating Handbook states for a crosswind landing the following, "...When landing in a strong crosswind, use the minimum flap setting required for the field length... . After touchdown, hold a straight course with the steerable nose wheel and occasional braking if necessary. The maximum allowable crosswind velocity is dependent upon pilot capability as well as aircraft limitations. With average pilot technique, direct crosswind of 15 knots can be handled with safety".

Aircraft

Registration
N739BN
Reported as
Cessna 172N
Category
Airplane
Serial number
17270414
Airframe hours
2,198
Engine
Lycoming O-360-A4M, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Capitol City Flyers, Inc.
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · July 13, 1995 · 51 hours before
Departed
MSN · Madison, WI
Destination
C29
Airport
C29 · Morey Airport, runway 12, 2,971 × 38 ft, asphalt

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
40
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
89 total · 6 in this make and model · 45 as pilot in command · 8 in the last 90 days · 3 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
170° at 13 knots, gusting 18
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 39 °F
Altimeter
30.00 inHg
Observed at
MSN, 8 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.