GAA19CA001

NTSB accident investigation · Cessna 340 · Keokuk, IA · October 1, 2018

Accident · No injuriesData collectionFinal report
Date
October 1, 2018, 03:30 local (08:30 UTC)
Place
Keokuk, IA
Injuries
3 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N89AMCessna 340
Defining event
Landing: Collision during takeoff/land
Weather
Instrument (IMC) · Night/dark
Status
Completed · report June 5, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20181001016609A
Case key
98396

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The pilot's failure to correctly identify the runway environment during an instrument approach at night in instrument meteorological conditions because he mistook building lights for runway lights, which resulted in landing short of the runway.

Findings · 8

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.

Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 340: 1 caseAll aircraft: 809 casesProbable cause
Perception/orientation/illusion: perceptionPersonnel issues › Psychological · PilotCessna 340: 1 caseAll aircraft: 61 casesProbable cause
Approach aid coverage/avail: glideslopeEnvironmental issues › Operating environment · Compliance w/ procedureCessna 340: 1 caseAll aircraft: 1 caseProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 340: 5 casesAll aircraft: 9,295 casesProbable cause
Ceiling/visibility/precip: drizzle/mistEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 340: 1 caseAll aircraft: 18 cases
Ceiling/visibility/precip: low visibilityEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 340: 3 casesAll aircraft: 175 cases
Light condition: darkEnvironmental issues › Conditions/weather/phenomena · Effect on operationCessna 340: 1 caseAll aircraft: 448 cases
Object/animal/substanceEnvironmental issues › Physical environment · Contributed to outcomeCessna 340: 1 caseAll aircraft: 224 cases

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 pilot reported that, while conducting an instrument approach at night in instrument meteorological conditions, about 50 ft above the decision altitude of 921 ft, he mistook building lights for runway lights. He inadvertently touched down the airplane in a soybean field about 3/4 mile short of the runway. He then increased engine power to full, and the airplane climbed "a couple hundred feet." Once he established visual contact with the runway lights, he landed the airplane on the runway without further incident. The pilot added that the lateral guidance from the localizer was "dead center" but that he could not recall the position of the vertical guidance needle. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The airport’s automated weather observation station reported that, about 5 minutes after the accident, the wind was from 030° at 3 knots, visibility was 1/2 statute mile with mist, overcast at 200 ft above ground level (agl), temperature 57°F, and dew point 57°F. The pilot reported that the airport ceiling was overcast at 300 ft agl with fog and rain and that visibility was 1 mile.

Factual narrative

The pilot reported that while conducting the RNAV GPS RNY 08 instrument approach, at night in instrument meteorological conditions, about 50 feet above the decision altitude of 921 feet, he mistook building lights for runway lights. He inadvertently touched down in a soybean field, about ¾ mile short of the runway. He then increased engine power to full, climbed "a couple hundred feet", established visual contact with the runway lights, and landed without further incident. The pilot added that the lateral guidance from the localizer was "dead center" but he could not recall the position of the vertical guidance needle. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station located on the airport reported that, about 5 minutes after the accident, the wind was from 030° at 3 knots, visibility at 1/2 statute miles with mist, overcast at 200 ft above ground level (AGL), temperature 57°F, dew point 57°F. The pilot reported that the airport ceiling was overcast at 300 ft AGL, with fog and rain, and visibility was one mile.

Aircraft

Registration
N89AM
Reported as
Cessna 340 (Undesignat)
Category
Airplane
Serial number
340-0545
Built
1975
Engines
Continental TIO-550, 310 horsepower, reciprocatingContinental TIO-550, 310 horsepower, reciprocating
Damage
Substantial damage
Flight
Executive/Corporate · Part 91
Operator
Windy Point Aviation Llc
Registered owner
Windy Point Aviation Llc
Airworthiness certificate
Standard, Normal
Departed
ORD · Chicago, IL
Destination
MPZ · Mount Pleasant, IA
Flight plan
IFR
Airport
EOK · Keokuk Muni, runway 08, 5,500 × 100 ft, concrete
Equipment
Electronic multifunction display, Electronic primary flight display, Onboard weather, Stall warning system, ADS-B, Auto-pilot, Electronic flight bag or handheld device

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
31
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
October 8, 2017
Seat
Left
Restraint
3-point
Flight hours
2,700 total · 215 in this make and model · 3,624 as pilot in command · 45 in the last 90 days · 15 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Instrument (IMC) · Night/dark
Wind
30° at 3 knots
Lowest ceiling
200 ft overcast
Temperature
57 °F, dew point 57 °F
Altimeter
30.14 inHg
Observed at
KEOK

Docket · 3

The files NTSB released with the investigation on March 11, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 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.