ATL02LA166

NTSB accident investigation · Cessna 172S · Immokalee, FL · September 6, 2002

Accident · No injuriesLimited investigationFinal report
Date
September 6, 2002, 13:45 local (17:45 UTC)
Place
Immokalee, FL
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N827SPCessna 172S
Weather
Visual (VMC) · Day
Status
Completed · report November 25, 2003
Report
Approved by Office Director
Parties
Cessna, Lycoming, FAA Miami FSDO
FAA report
20020906023989A
Case key
55678

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 student pilot's improper flare at touchdown resulted in a hard landing while performing an off-airport precautionary landing after the inadvertent activation of the autopilot.

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.

Hard landingLanding - flare/touchdown
Autopilot - inadvertent activationPilot in command
Precautionary landing - performedPilot in command
Flare - improperPilot in commandCause

Analysis

According to the student pilot, she departed from runway 09, and at 300 feet above ground level she began "fighting with the yoke" of the airplane. The student pilot stated that she adjusted the trim, but the "nose was up and the airplane was coming down". She squawked 7700 on the transponder, and prepared for a precautionary landing by closing the throttle. The student pilot selected a field in front of her, approximately two miles northeast of the departure end of runway 09. The airplane landed hard, with the nose wheel impacting the ground first, and slid across a wet pasture coming to rest in a pond. The pilot stated that the autopilot circuit breaker had been pulled prior to flight and that she had observed the autopilot run through the preflight checks when electrical power was applied to the aircraft prior to departure. According to the student pilot, she had been instructed during her flight training to pull the circuit breaker prior to each solo flight and not to operate the autopilot at this stage of her training. Examination of the airplane revealed all of the circuit breakers were in the "IN" position. The nose landing gear collapsed aft and to the left, and the engine firewall was damage. The elevator trim was found in a nose up position. A series of tests were conducted to verify operation of the autopilot computer, autopilot circuit breaker, autopilot disconnect switch on the yoke, and the trim switch. The autopilot and its components operated normally during these tests.

Factual narrative

On September 6, 2002, at 1345 eastern daylight time, a Cessna 172S, N827SP, registered to Skystead, Inc., and operated by a student pilot, collided with the ground shortly after takeoff from the Immokalee Airport in Immokalee, Florida The instructional flight was operated under the provisions of Title 14 CFR Part 91, and visual flight rules. Visual meteorological conditions prevailed and no flight plan was filed for the local training flight. The student pilot was not injured, and the airplane was substantially damaged. The training flight originated from Naples Municipal Airport in Naples, Florida, at 1200.

According to the student pilot, she departed from runway 09, and at 300 feet above ground level she began "fighting with the yoke" of the airplane. The pilot stated that she adjusted the trim, but the "nose was up and the airplane was coming down". The engine was running and the airspeed was at 65 knots. The pilot decided to "quit fighting" because she knew the airplane was "going down". She squawked 7700 on the transponder, and prepared for a precautionary landing by closing the throttle. The student pilot selected a field in front of her, approximately two miles northeast of the departure end of runway 09. The airplane landed hard, with the nose wheel impacting the ground first, and slid across a wet pasture coming to rest in a pond.

The pilot stated that the autopilot circuit breaker had been pulled prior to flight and the autopilot was disengaged. She also stated that she had observed the autopilot run through the preflight checks when electrical power was applied to the aircraft prior to departure. According to the student pilot, she had been instructed during her flight training to pull the circuit breaker prior to each solo flight and not to operate the autopilot at this stage of her training. The autopilot circuit breaker is located on the left side of the instrument panel, to the left of the control yoke and several inches above the landing light ON/OFF switch.

Examination of the airplane revealed all of the circuit breakers were in the "IN" position. The nose landing gear collapsed aft and to the left, and the engine firewall was damage. The upper and left engine cowling were pulled away from the fuselage, and the left engine cowling was damaged. The elevator trim was found in a nose up position instead of the checklist specified takeoff position which is clearly marked on the elevator trim wheel. The propeller blades were bent moderately aft and the blade tips were slightly discolored. Although the engine was exposed to water, it was successfully started and idle was smooth at 650 rpm. The engine was successfully run up to approximately 2125 rpm.

The autopilot computer installed on the airplane was a Bendix/King KC 140 Flight Control Computer, P/N 065-00176-7702. A series of tests were conducted to verify operation of the autopilot computer, autopilot circuit breaker, autopilot disconnect switch on the yoke, and the trim switch. The autopilot and its components operated normally during these tests.

In a separate written statement, the student pilot stated that she "should have realized that it wasn't possible for the autopilot to be disengaged and still work". The operator has revised training to include more instruction on the use of the autopilot and procedures to handle inadvertent autopilot engagement.

Aircraft

Registration
N827SP
Reported as
Cessna 172S
Category
Airplane
Serial number
17258740
Airframe hours
1,181
Engine
Lycoming IO 360 L2A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Skystead Inc.
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
100 hour · September 4, 2002 · 7.7 hours before
Departed
APF · Naples, FL
Destination
IMM · Immokalee, FL
Airport
IMM · Immokalee, runway 090, 5,000 × 150 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
Student pilot
Age
38
Injuries
None
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
94 total · 93 in this make and model · 5 as pilot in command · 9 in the last 90 days · 7 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 10 knots, gusting 17
Visibility
10 statute miles
Lowest ceiling
None
Temperature
84 °F, dew point 75 °F
Altimeter
29.94 inHg
Observed at
RSW, 20 nm away

Docket · 6

The files NTSB released with the investigation on October 9, 2003, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.5 MB in all.

FAA reports on this event · 1

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