GAA16CA369

NTSB accident investigation · Stinson 108 · Red Lodge, MT · July 8, 2016

Accident · No injuriesData collectionFinal report
Date
July 8, 2016, 15:10 local (21:10 UTC)
Place
Red Lodge, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N955CStinson 108
Defining event
Takeoff: Wildlife encounter (non-bird)
Weather
Visual (VMC) · Day
Status
Completed · report August 31, 2016
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20160708013809A
Case key
93585

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

A deer running across the runway and impacting the left side of the airplane, resulting in a loss of directional control, a runway excursion, and a ground loop.

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.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedStinson 108-3: 11 casesAll aircraft: 3,958 casesProbable cause
Object/animal/substance: animal(s)/bird(s)Environmental issues › Physical environment · Effect on operationStinson 108-3: 1 caseAll aircraft: 358 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 of the tailwheel equipped airplane reported that during takeoff he noticed movement from the left as a deer ran onto the runway. He further reported that he applied right rudder to avoid hitting the deer, but the deer impacted the airplane between the left pilot's door and the horizontal stabilizer causing the airplane to veer to the left. The pilot stated that he attempted to recover by applying maximum right brake and right rudder, however it was ineffective and the airplane exited the runway to the left, ground looped, and nosed over. The airplane sustained substantial damage to both wings, empennage and fuselage. The pilot reported that there were no pre impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

Factual narrative

The pilot of the tailwheel equipped airplane reported that during takeoff he noticed movement from the left as a deer ran onto the runway. He further reported that he applied right rudder to avoid hitting the deer, but the deer impacted the airplane between the left pilot's door and the horizontal stabilizer causing the airplane to veer to the left. The pilot stated that he attempted to recover by applying maximum right brake and right rudder, however it was ineffective and the airplane exited the runway to the left, ground looped, and nosed over. The airplane sustained substantial damage to both wings, empennage and fuselage. The pilot reported that there were no pre impact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation.

Aircraft

Registration
N955C
Reported as
Stinson 108 (3)
Category
Airplane
Serial number
108-3955
Built
1947
Airframe hours
2,923
Engine
Franklin 6A-350-C1R, 205 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 14, 2016
Departed
RED · Red Lodge, MT
Destination
BIL · Billings, MT
Airport
RED · Red Lodge, runway 16, 4,000 × 75 ft, asphalt
Equipment
Electronic flight bag or handheld device, Handheld GPS

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
69
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 3, With waivers/limitations
Last flight review
July 3, 2014
Seat
Left
Restraint
4-point
Flight hours
3,450 total · 1,200 in this make and model · 3,450 as pilot in command · 10 in the last 90 days · 8 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 14 knots, gusting 19
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 28 °F
Altimeter
29.94 inHg
Observed at
KPOY, 28 nm away

Docket · 2

The files NTSB released with the investigation on August 3, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.3 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.