CEN14CA123

NTSB accident investigation · Cessna 172N · Boulder, CO · January 25, 2014

Accident · Minor injuriesData collectionFinal report
Date
January 25, 2014, 16:00 local (23:00 UTC)
Place
Boulder, CO
Injuries
3 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N738LQCessna 172N
Defining event
Approach-VFR pattern final: Turbulence encounter
Weather
Visual (VMC) · Day
Status
Completed · report February 13, 2014
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20140125001999A
Case key
88722

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 pilot's failure to maintain airplane control during final approach with known turbulence present.

Findings · 2

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 172N: 150 casesAll aircraft: 9,295 casesProbable cause
Turbulence: terrain induced turbulenceEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeCessna 172N: 3 casesAll aircraft: 70 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 flew a round robin cross-country flight to practice touch and go landings at nearby airports. At one airport, he aborted the landing due to "moderate to severe turbulence on final." During the approach to the destination airport, he aborted his first approach due to strong winds and turbulence and decided to go around. During his second approach, the airplane lost about 200 feet of altitude following a downdraft. The pilot applied full throttle to gain airspeed. A wind gust lifted the airplane's right wing and the pilot applied full right aileron. The airplane's left wing, the left main landing gear, and the nose landing gear impacted terrain where the airplane skidded for 100 to 150 feet and sustained substantial wing damage. Subsequent to the accident, the pilot became aware of the airport/facility directory remarks for turbulence associated with the selected runway. Additionally, he reported that the airplane did not have any mechanical malfunctions during the accident flight.

Factual narrative

The pilot flew a round robin cross-country flight to practice touch and go landings at nearby airports. At one airport, he aborted the landing due to "moderate to severe turbulence on final." During the approach to the destination airport, he aborted his first approach due to strong winds and turbulence and decided to go around. During his second approach, the airplane lost about 200 feet of altitude following a downdraft. The pilot applied full throttle to gain airspeed. A wind gust lifted the airplane's right wing and the pilot applied full right aileron. The airplane's left wing, the left main landing gear, and the nose landing gear impacted terrain where the airplane skidded for 100 to 150 feet and sustained substantial wing damage. Subsequent to the accident, the pilot became aware of the airport/facility directory remarks for turbulence associated with the selected runway. Additionally, he reported that the airplane did not have any mechanical malfunctions during the accident flight.

Aircraft

Registration
N738LQ
Reported as
Cessna 172N (N)
Category
Airplane
Serial number
17270065
Built
1977
Airframe hours
9,704
Engine
Lycoming O-320-H2AD, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Journeys Aviation Inc.
Registered owner
Davison Joseph E Jr
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 3, 2014
Departed
LMO · Longmont, CO
Destination
BDU · Boulder, CO
Airport
BDU · Boulder Muni, runway 26, 4,100 × 75 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
34
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
August 2, 2012
Seat
Left
Restraint
3-point
Flight hours
84 total · 22 in this make and model · 80 as pilot in command · 7 in the last 90 days · 0 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 14 knots, gusting 22
Visibility
10 statute miles
Lowest ceiling
None
Temperature
59 °F, dew point 18 °F
Observed at
BDU

Docket · 2

The files NTSB released with the investigation on February 5, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.9 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.