- Date
- August 22, 2014, 11:30 local (17:30 UTC)
- Place
- Rigby, ID
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N171CTRans S 6S
- Defining event
- Takeoff: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 13, 2014
- Report
- Approved by Office Director
- NTSB office
- Western Pacific Region
- Parties
- FAA
- FAA report
- 20140822015979A
- Case key
- 89933
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 student pilot's loss of directional control during takeoff in gusting wind conditions. Contributing to the accident was the flight instructor's failure to intervene and apply corrective flight control inputs.
Findings · 5
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 light sport flight instructor was providing flight instruction to the owner of the experimental, amateur-built, tailwheel-equipped light sport airplane. The airplane was equipped with side-by-side seating; the owner sat in the left seat and was the flying pilot, and the instructor sat in the right seat. They departed the home, non-towered airport and flew uneventfully to an airport with an operating air traffic control tower, where they practiced landings and takeoffs. They then returned to the home airport for additional landings and takeoffs. All portions of the flight through that point were uneventful. After returning to, and making at least one landing back at the home airport, the pilot was attempting a takeoff from runway 19. Either at or shortly after liftoff, the airplane was struck by an "unexpected wind gust," which resulted in a loss of directional control. The student pilot was unable to regain control, and the flight instructor did not physically intervene, before the airplane struck a hangar located about 270 feet from the runway centerline. The right wing sustained substantial damage when it struck the hangar. The airplane then passed between that hangar and an adjacent one. The flight instructor did not offer any explanation as to why he did not intervene. The measured wind at an airport located about 10 miles southwest of the accident airport was reported as 320 degrees at 8 knots about 37 minutes prior to the accident, and as 090 degrees at 3 knots about 23 minutes after the accident. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Factual narrative
The light sport flight instructor was providing flight instruction to the owner of the experimental, amateur-built, tailwheel-equipped light sport airplane. The airplane was equipped with side-by-side seating; the owner sat in the left seat and was the flying pilot, and the instructor sat in the right seat. They departed the home, non-towered airport and flew uneventfully to an airport with an operating air traffic control tower, where they practiced landings and takeoffs. They then returned to the home airport for additional landings and takeoffs. All portions of the flight through that point were uneventful. After returning to, and making at least one landing back at the home airport, the pilot was attempting a takeoff from runway 19. Either at or shortly after liftoff, the airplane was struck by an "unexpected wind gust," which resulted in a loss of directional control. The student pilot was unable to regain control, and the flight instructor did not physically intervene, before the airplane struck a hangar located about 270 feet from the runway centerline. The right wing sustained substantial damage when it struck the hangar. The airplane then passed between that hangar and an adjacent one. The flight instructor did not offer any explanation as to why he did not intervene. The measured wind at an airport located about 10 miles southwest of the accident airport was reported as 320 degrees at 8 knots about 37 minutes prior to the accident, and as 090 degrees at 3 knots about 23 minutes after the accident. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
Aircraft
- Registration
- N171CT
- Reported as
- Rans S 6S (SUPERSIX)
- Category
- Airplane
- Serial number
- 11021467
- Built
- 2005
- Airframe hours
- 468
- Engine
- Rotax 912S, 100 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Airworthiness certificate
- Special, Experimental light sport (Special)
- Last inspection
- Annual · May 10, 2014
- Departed
- KIDA · Idaho Falls, ID
- Destination
- U56 · Rigby, ID
- Airport
- U56 · Rigby, runway 19, 3,500 × 50 ft, asphalt
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 · 2
As NTSB recorded them. NTSB leaves out names.
- Role
- Flight instructor
- Age
- 58
- Injuries
- None
- Certificates
- Flight instructor, Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, With waivers/limitations
- Last flight review
- May 1, 2013
- Seat
- Right
- Restraint
- 3-point
- Flight hours
- 1,587 total · 87 in this make and model · 1,400 as pilot in command · 57 in the last 90 days · 22 in the last 30 days
- Role
- Student pilot
- Age
- 66
- Injuries
- None
- Certificate
- Student
- Medical
- Sport pilot
- Seat
- Left
- Restraint
- 3-point
- Flight hours
- 21 total · 21 in this make and model · 5 as pilot in command · 13 in the last 90 days · 6 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 320° at 8 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- 10,000 ft overcast
- Temperature
- 57 °F, dew point 54 °F
- Altimeter
- 30.07 inHg
- Turbulence
- Unknown
- Observed at
- KIDA, 10 nm away
Docket · 6
The files NTSB released with the investigation on October 28, 2014, on NTSB’s docket system: statements, records, photos and specialists’ reports. 10.2 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.