SEA06CA070

NTSB accident investigation · Aviat A-1B · Driggs, ID · March 31, 2006

Accident · No injuriesData collectionFinal report
Date
March 31, 2006, 10:45 local (17:45 UTC)
Place
Driggs, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N471AMAviat A-1B
Weather
Visual (VMC) · Day
Status
Completed · report August 29, 2006
Report
Approved by Office Director
FAA report
20060331003589A
Case key
63428

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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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.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - on ground/waterLanding - roll
Directional control - not maintainedPilot in commandCause
Weather condition - tailwindFactor
Nose overLanding - roll
Terrain condition - snow coveredFactor
Terrain condition - softFactor

Analysis

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."

Factual 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."

Aircraft

Registration
N471AM
Reported as
Aviat A-1B
Category
Airplane
Serial number
2271
Engine
Lycoming O-360, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Departed
DIJ · Driggs, ID
Destination
DIJ
Airport
DIJ · Driggs-Reed Memorial, runway 3

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
73
Certificate
Private
Airplane ratings
Multi-engine land, Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 3
Flight hours
6,117 total · 11 in this make and model · 5 in the last 90 days · 5 in the last 30 days

Weather

Conditions
Visual (VMC) · Day

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.