GAA20CA072

NTSB accident investigation · Cessna U206 · Mexico, MO · November 10, 2019

Accident · No injuriesData collectionFinal report
Date
November 10, 2019, 16:00 local (22:00 UTC)
Place
Mexico, MO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N29173Cessna U206
Defining event
Standing-engine(s) start-up: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report May 21, 2020
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20191110017009A
Case key
100559

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 properly set the parking brake before exiting an operating airplane, which resulted in a runaway airplane and subsequent impact with trees.

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.

Landing gear system: brakeAircraft › Aircraft systems · Incorrect use/operationCessna U206C: 1 caseAll aircraft: 297 casesProbable cause

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, after starting the airplane with a ground power unit (GPU), he exited the airplane. He disconnected the GPU and removed the wheel chocks. The airplane started to roll down an incline. He jumped into the airplane through the aft cargo door and attempted to climb into the pilot's seat to no avail. He pulled the fuel to cut off, and the airplane impacted the trees. The pilot further reported that he had set the parking brake before starting the airplane but either failed to set it completely or bumped it when he exited the pilot's seat to disconnect the GPU. The airplane sustained substantial damage to both wings and the right-wing lift strut. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

The pilot of the turbo prop airplane reported that, after starting the airplane with a ground power unit (GPU) he exited the airplane. He disconnected the GPU and removed the wheel chocks. The airplane started to roll down an incline. He jumped into the airplane through the aft cargo door and attempted climb into the pilot's seat, to no avail. He pulled the fuel to cut off and the airplane impacted the trees. The pilot further reported that he had set the parking brake before starting the airplane, but either failed to set it completely or bumped it when he exited the pilot's seat to disconnect the GPU. The airplane sustained substantial damage to the both wings and right wing lift strut. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N29173
Reported as
Cessna U206 (C)
Category
Airplane
Serial number
U206-1140
Built
1968
Airframe hours
14,851.4
Engine
Pratt and Whitney PT6A-20, turbo prop
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 7, 2019
Departed
6MU4 · Mexico, MO
Destination
10MO · Williamsburg, MO
Airport
6MU4 · Flying Shamrock
Equipment
Stall warning system, ADS-B

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
53
Injuries
None
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
October 1, 2019
Seat
None
Restraint
None
Flight hours
8,524 total · 315.6 in this make and model · 6,500 as pilot in command · 15.1 in the last 90 days · 5 in the last 30 days · 0.2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 5 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 37 °F
Altimeter
29.97 inHg
Observed at
KMYJ, 8 nm away

Docket · 3

The files NTSB released with the investigation on January 3, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.4 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.

Other investigations on N29173 · 1

Matched to the same aircraft by N-number and date.