WPR12LA160

NTSB accident investigation · Cessna 150H · Kent, WA · April 7, 2012

Accident · Serious injuriesLimited investigationFinal report
Date
April 7, 2012, 14:30 local (21:30 UTC)
Place
Kent, WA
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N6616SCessna 150H
Defining event
Approach-VFR pattern downwind: Unknown or undetermined
Weather
Visual (VMC) · Day
Status
Completed · report June 9, 2015
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Textron Aviation, Federal Aviation Administration, Continental Motors
FAA report
20120407004729A
Case key
83322

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 while maneuvering in the traffic pattern, which resulted in a collision with trees.

Findings · 3

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 150H: 19 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 150H: 2 casesAll aircraft: 1,310 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Contributed to outcomeCessna 150H: 4 casesAll aircraft: 933 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 stated that he was on a personal cross-country flight to visit friends and that he had intended to land at a private uncontrolled airstrip; however, he did not recall the events leading up to the accident. A witness in the area reported hearing an unusual sound that drew his attention to the airplane. He observed the airplane flying about 20 ft above the ground in a 90-degree, right-wing-low attitude when it collided with trees. The airplane came to rest inverted about midfield of the airstrip on a street adjacent to the airstrip in a residential neighborhood. A postaccident airframe and engine examination revealed no mechanical malfunctions or failures that would have precluded normal operation. It is likely that, while the pilot was maneuvering the airplane on the downwind leg of the traffic pattern for the destination airstrip, he failed to maintain control and subsequently collided with trees.

Factual narrative

On April 7, 2012, about 1430 Pacific daylight time, a Cessna 150H, N6616S impacted trees, and came to rest inverted near Crest Airpark, Kent, Washington. The private pilot, the sole occupant, was seriously injured. The airplane sustained substantial damage. The airplane was registered to an individual, and operated by the pilot under the provision of 14 Code of Federal Regulations (CFR) Part 91 as a personal flight. Visual meteorological conditions prevailed for the flight, and no flight plan was filed. The flight originated from Sanderson Field Airport, Shelton, Washington.The pilot reported that the flight was a personal cross-country flight to Kent to visit friends. He stated that he did not recall the events leading up to the accident. A local area witness heard an unusual noise, which drew his attention to the airplane. He observed the airplane flying about 20 feet above the ground, in a 90-degree, right-wing low attitude, when it collided with a tree. The airplane subsequently came to rest inverted alongside a street in a residential neighborhood. The witness responded to the accident site, and reported that there was no fuel leaking from the airplane, and there was no fire. During the postaccident wreckage examination, the engine was prepared for an engine run, which included the use of a header tank in order to start the engine. The engine started and was run to 1,800 rpm for a few minutes before it was shutdown. At the conclusion of the examination, no mechanical malfunctions or failures were revealed with the airframe or engine that would have precluded normal operation. ADDITIONAL INFORMATION The uncontrolled airstrip was adjacent to the street, and the airplane came to rest mid-field of the airport. The nearest weather reporting facility was located at Seattle-Tacoma Airport, Seattle, Washington, approximately 11 nautical miles northwest of the accident site. At 1453, the wind was from 340 degrees at 13 knots.

Aircraft

Registration
N6616S
Reported as
Cessna 150H
Category
Airplane
Serial number
15067416
Built
1967
Engine
Cont Motor O-200 SERIES, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Utility
Last inspection
Annual · January 11, 2012
Departed
SHN · Shelton, WA
Destination
S36 · Kent, WA
Flight plan
VFR
Airport
S36 · Crest Airpark, runway 33, 3,288 × 40 ft, asphalt
Equipment
Stall warning system

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
55
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Flight hours
115 total · 95 in this make and model · 60 as pilot in command · 5 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
340° at 13 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 34 °F
Altimeter
30.18 inHg
Observed at
SEA, 11 nm away

Docket · 8

The files NTSB released with the investigation on May 6, 2015, on NTSB’s docket system: statements, records, photos and specialists’ reports. 14.7 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.