- Date
- April 27, 2018, 12:50 local (19:50 UTC)
- Place
- Eliza Island, WA
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N6933MStinson 108
- Defining event
- Takeoff: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report September 10, 2018
- Report
- Approved by Office Director
- NTSB office
- General Aviation Accidents
- Parties
- FAA
- FAA report
- 20180427004189A
- Case key
- 97126
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
The pilot’s exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall.
Findings · 4
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.
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 the takeoff roll, he had difficulty staying on the runway. He added, in a telephone interview with the National Transportation Safety Board investigator in charge, that, while airborne, the airplane aerodynamically stalled into brush off the end of the runway. The airplane nosed over and came to rest inverted. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station located about 9 miles to the north-northwest reported that that, about the time of the accident, the wind was from 170° at 8 knots, gusting to 18 knots. The airplane departed the southeast runway.
Factual narrative
The pilot of the tailwheel-equipped airplane reported that, during the takeoff roll, he had difficulty staying on the runway. He added, in a telephone interview with the National Transportation Safety Board Investigator-In-Charge, that, while airborne, the airplane aerodynamically stalled into brush off the end of the runway. The airplane nosed over and came to rest inverted. The airplane sustained substantial damage to the left wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The automated weather observation station located about 9 miles to the north-northwest reported that that, about the time of the accident, the wind was from 170° at 8 knots, gusting to 18 knots. The airplane departed the southeast runway.
Aircraft
- Registration
- N6933M
- Reported as
- Stinson 108 (3)
- Category
- Airplane
- Serial number
- 108-4933
- Built
- 1949
- Airframe hours
- 2,538
- Engine
- Franklin 6A-335-B, 180 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · April 1, 2018
- Departed
- WA93 · Eliza Island, WA
- Destination
- BVS · Mount Vernon, WA
- Airport
- WA93 · Eliza Island, runway SE, 1,500 × 100 ft, grass/turf
- Equipment
- None
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
- 74
- Injuries
- Minor
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 3, Without waivers/limitations
- Last flight review
- July 1, 2001
- Seat
- Left
- Flight hours
- 2,200 total · 1,100 in this make and model · 2,200 as pilot in command · 5 in the last 30 days · 3 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 170° at 8 knots, gusting 18
- Visibility
- 10 statute miles
- Lowest ceiling
- 700 ft overcast
- Temperature
- 54 °F, dew point 48 °F
- Altimeter
- 29.86 inHg
- Observed at
- KBLI, 9 nm away
Docket · 3
The files NTSB released with the investigation on July 12, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 807 KB 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.