- Date
- November 3, 2010, 17:00 local (22:00 UTC)
- Place
- Sac City, IA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N475TWWelch Thomas RV9
- Defining event
- Landing-flare/touchdown: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report April 12, 2011
- Report
- Approved by Office Director
- NTSB office
- Central Region
- Parties
- FAA-DSM-FSDO
- FAA report
- 20101103052879A
- Case key
- 77773
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 loss of directional control while landing with a gusting wind.
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.
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
According to the pilot, the weather information he obtained en route indicated that the wind at his destination airport was from 300 degrees at 25 knots. The airplane encountered turbulence and wind gusts while on final approach and, despite the pilot’s control inputs, the airplane impacted terrain off the right side of the runway. The wind reported 25 miles from the accident site, about 15 minutes after the accident, was from 310 degrees at 23 knots gusting to 33 knots. The wings, firewall, and fuselage sustained substantial damage.
Factual narrative
The pilot obtained the weather information from Flight Watch during the flight. The pilot reported the local winds at his destination airport were from 300 degrees at 25 knots, so he elected to land on runway 32. The airplane encountered turbulence on final approach and at an altitude of 20 feet above the runway, the airplane unexpectedly began to gain altitude. The pilot pushed the control stick forward, but the airplane continued to gain altitude. The pilot reported that at 50 feet above the runway, he encountered turbulence and the nose of the airplane dropped abruptly. He added power and pulled back on the control stick, but the airplane impacted the terrain about 10 feet off the right side of the runway, coming to rest about 40 - 50 feet from the point of impact. The winds reported 25 miles from the accident site, about 15 minutes after the time of the accident, were from 310 degrees at 23 knots gusting to 33 knots. The wings, firewall, and fuselage sustained substantial damage.
Aircraft
- Registration
- N475TW
- Reported as
- Welch Thomas RV9
- Category
- Airplane, amateur-built
- Serial number
- 90475
- Airframe hours
- 446
- Engine
- Nsi EJ25, 180 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Operator
- Micheal L. Harmon, Jr.
- Registered owner
- Micheal L. Harmon, Jr.
- Airworthiness certificate
- Special, Experimental (Special)
- Last inspection
- Condition · April 7, 2010 · 85 hours before
- Departed
- 1H2 · Effingham, IL
- Destination
- SKI · Sac City, IA
- Airport
- SKI · Sac City Municipal, runway 32, 2,350 × 60 ft, concrete
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
- 35
- Injuries
- None
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Without waivers/limitations
- Last flight review
- June 5, 2010
- Seat
- Left
- Flight hours
- 305 total · 90 in this make and model · 240 as pilot in command · 70 in the last 90 days · 28 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 310° at 23 knots, gusting 33
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 59 °F, dew point 9 °F
- Altimeter
- 30.09 inHg
- Observed at
- CIN, 25 nm away
Docket · 1
The files NTSB released with the investigation on December 10, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.1 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 N475TW · 1
Matched to the same aircraft by N-number and date.