# NTSB SEA06CA070: Aviat A-1B, N471AM, Driggs, ID, March 31, 2006 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 31, 2006, 10:45 local (17:45 UTC) - Place: Driggs, ID - Coordinates: 43.741943, -111.097778 - Nearby events: https://openairdocs.org/map.md?lat=43.7419&lon=-111.0978&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report August 29, 2006 - Report: Approved by Office Director - NTSB case key (mKey): 63428 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA06CA070 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/63428/pdf - Page: https://openairdocs.org/ntsb/SEA06CA070 ## 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 In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - directional control - not maintained, pilot in command (cause) - weather condition - tailwind (contributing factor) - Nose over, landing - roll - terrain condition - snow covered (contributing factor) - terrain condition - soft (contributing factor) ## 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](https://openairdocs.org/aircraft/N471AM), registered now, S/N 2271, built 2004 (OpenAirDocs) - Reported make and model: Aviat A-1B - Registry model: [Aviat A-1B](https://openairdocs.org/model/aviat-a-1b) (registry code 2210406) (OpenAirDocs) - Registry engine: [Lycoming O-360 series](https://openairdocs.org/engine/lycoming-o-360-series) (registry code 41575, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 2271 - Engines: 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 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 73; 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 (OpenAirDocs). - [Accident 20060331003589A](https://openairdocs.org/incident/20060331003589A), Mar 31, 2006: Aviat A1B, Driggs, ID, Substantial damage. (-23) The pilot was conducting a local proficiency flight and intended to do some touch and go operations. During the first practice landing to rwy 03 he… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.