WPR19LA213

NTSB accident investigation · Cessna 150 · Roundup, MT · July 30, 2019

Accident · Serious injuriesClass 3 · LimitedFinal report
Date
July 29, 2019, 20:40 local (Jul 30, 2019, 02:40 UTC)
Place
Roundup, MT
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
C-GEYPCessna 150
Defining event
Maneuvering-low-alt flying: Collision with terr/obj (non-CFIT)
Weather
Visual (VMC) · Dusk
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
100025

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 an adequate altitude above the trees while maneuvering to land.

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.

Attention/monitoring: monitoring environmentPersonnel issues › Psychological · PilotAll aircraft: 809 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedAll aircraft: 1,310 casesProbable cause
Object/animal/substance: tree(s)Environmental issues › Physical environment · Effect on operationAll 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.

Collision with terr/obj (non-CFIT)Maneuvering-low-alt flyingAll aircraft: 10,189 casesDefining event

Analysis

During a cross-county flight, the pilot arrived at his planned destination near sunset and was maneuvering to land. While maneuvering, the airplane struck a stand of trees and subsequently impacted terrain. The pilot reported that the airplane’s engine was “running fine” and that there were no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. Postaccident examination of the airframe and engine also revealed no preimpact mechanical anomalies or malfunctions that would have precluded normal operation.

Factual narrative

On July 29, 2019, about 2040 mountain daylight time, a Cessna 150M airplane, Canadian Registered C-GEYP, was substantially damaged when it was involved in an accident near Roundup Airport (RPX), Roundup, Montana. The private pilot was seriously injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot remembered flying cross-country that day starting from Oshkosh, Wisconsin. His previous stop before the accident was at Harding County Airport, (9D2), Buffalo, South Dakota, where he filled up with fuel. His final stop of the day was scheduled to be RPX, which was about 215.7 miles east-southeast of 9D2. The pilot recalled arriving in the local area of RPX about 2030. He mentioned that the airplane’s engine was “running fine” when he felt an impact, which was the last thing he remembered about the accident. He had no recollection of how he egressed from the airplane but remembered being found outside the airplane the next morning. The pilot further reported that there were no preimpact mechanical malfunctions or failures with the airplane. The accident site was located about 0.5 mile to the northwest of the approach end for runway 07. A review of the accident site pictures revealed that a tall tree was broken about 10 ft from the top, and the top portion of the tree was laying on the ground with a fresh break. A postaccident examination of the airplane revealed that it sustained substantial impact damage to the fuselage and wings. Flight control continuity was established. The engine was examined and was unable to be rotated due to the crankshaft being bent, which was consistent with impact damage. No other anomalies were noted during the examination of the engine or engine accessories that would have precluded normal operation. Sunset in Roundup, Montana, on the day of the accident was 2049.

Aircraft

Registration
C-GEYP
Reported as
Cessna 150 (M)
Category
Airplane
Serial number
15078027
Built
1976
Airframe hours
3,600
Engine
Continental O-200, 100 hp, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · November 1, 2018
Departed
9D2 · Harding, SD
Destination
Same as departure
Airport
RPX · Roundup, runway 07/25, 5,099 × 75 ft, asphalt
Equipment
Handheld GPS, Stall warning system

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
68
Injuries
Serious
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Flight hours
600 total · 475 in this make and model · 550 as pilot in command

Weather

Conditions
Visual (VMC) · Dusk
Wind
130° at 7 knots
Visibility
10 statute miles
Temperature
82 °F, dew point 52 °F
Altimeter
29.96 inHg
Observed at
KBIL, 40 nm away
METAR
METAR KBIL 300253Z 13007KT 10SM FEW110 SCT180 28/11 A2996 RMK AO2 SLP108 CB DSNT SW NW SHRA DSNT SW-NW T02830111 55003

Docket · 5

The files NTSB released with the investigation on May 18, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.3 MB in all.