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NTSB Report

March 31, 2006 · Aviat A-1B · N471AM

Driggs, ID

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
March 31, 2006
Injury Outcomes
No injuries (1 uninjured)
Location
Driggs, ID
Aircraft
Aviat A-1B
Tail Number
N471AM
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA06CA070

According to the pilot, he was performing touch-and-go landings on runway 03. During the landing roll, he experienced a tailwind, and the airplane departed the right side of the runway. The airplane's wheels sank into snow about 12 inches deep, and the airplane nosed over. The right wing strut was bent, and the top of the vertical stabilizer and the rudder were crushed. The following wind conditions were recorded by the Automated Surface Observing Station at the airport: At 0956, wind from 360 degrees at 3 knots. At 1056, wind from 190 degrees at 11 knots. At 1112, wind from 200 degrees at 14 knots, remark wind shift at 1052. The pilot reported that after the accident, he was told that "the wind had shifted to about a 10 knot tailwind from that reported by the FBO and [he] was unprepared for this condition."

NTSB Probable Cause

The pilot's failure to maintain directional control during the landing roll, which resulted in a loss of control and subsequent nose over. Contributing factors were the tailwind and the soft snow-covered terrain.

Full Narrative

On March 31, 2006, about 1045 mountain standard time, an Aviat A-1B airplane, N471AM, nosed over following a loss of control during the landing roll on runway 03 at the Driggs-Reed Memorial Airport, Driggs, Idaho. The private pilot, the sole occupant, was not injured. The airplane, which was registered to and operated by the pilot, sustained substantial damage. Visual meteorological conditions prevailed and no flight plan was filed for the local personal flight. The 14 CFR Part 91 flight departed from Driggs about 1020. According to the pilot, he was performing touch-and-go landings on runway 03. During the landing roll, he experienced a tailwind, and the airplane departed the right side of the runway. The airplane's wheels sank into snow about 12 inches deep, and the airplane nosed over. The right wing strut was bent, and the top of the vertical stabilizer and the rudder were crushed. The following wind conditions were recorded by the Automated Surface Observing Station at the airport: At 0956, wind from 360 degrees at 3 knots. At 1056, wind from 190 degrees at 11 knots. At 1112, wind from 200 degrees at 14 knots, remark wind shift at 1052. The pilot reported that after the accident, he was told that "the wind had shifted to about a 10 knot tailwind from that reported by the FBO and [he] was unprepared for this condition."

Flight

Event TypeAccident
Event Time10:45 MST
Nearest AirportDriggs-Reed Memorial (0nm)
Runway3
Flight Plan FiledNone
Aircraft FireNo

Aircraft

AircraftAviat A-1B
Tail NumberN471AM
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360 · Reciprocating

People & Injuries

Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 73 · Third Class

Conditions

ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0

Appendix: Source Data