# NTSB DEN05CA135: Aviat A-1B, N477DK, Sheridan, WY, September 7, 2005 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: September 7, 2005, 10:50 local (16:50 UTC) - Place: Sheridan, WY - Coordinates: 44.769165, -106.980278 - Nearby events: https://openairdocs.org/map.md?lat=44.7692&lon=-106.9803&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report December 20, 2005 - Report: Approved by Office Director - Parties: CPR FSDO - NTSB case key (mKey): 62418 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN05CA135 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62418/pdf - Page: https://openairdocs.org/ntsb/DEN05CA135 ## Probable cause pilot's failure to maintain aircraft control during the aborted landing. A contributing factor was the pilot's failure to maintain airspeed which resulted in an inadvertent stall. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, landing - aborted - aircraft control - not maintained, pilot in command (cause) - airspeed - not maintained, pilot in command (contributing factor) - stall - inadvertent, pilot in command (contributing factor) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis During a touch and go, the pilot intentionally landed long down the runway in order to facilitate a shorter taxi after landing. The pilot lost directional control of the airplane and attempted "to fly out of it." The pilot increased the throttle and "pulled the airplane up out of ground effect." The airplane stalled approximately 30 feet agl, descended, and impacted terrain in a nose low attitude. At the time of the accident, the pilot estimated the wind from 330 degrees at 5 knots. The pilot noted no mechanical anomalies with the airplane during the accident flight. ## Factual narrative On September 7, 2005, approximately 1050 mountain daylight time, an Aviat A-1B single-engine airplane, N477DK, sustained substantial damage when it impacted terrain following a loss of control during an attempted go-around at the Sheridan County Airport (SHR), Sheridan, Wyoming. The private pilot, sole occupant and operator of the airplane, sustained minor injuries. Visual meteorological conditions prevailed, and a flight plan was not filed for the Title 14 Code of Federal Regulations Part 91 personal flight. The local flight originated at SHR approximately 0930. According to the pilot, he departed SHR and performed slow flight maneuvers near SHR prior to executing four touch and go landings on runway 32. During the fourth touch and go landing, the pilot intentionally landed long down the runway in order to facilitate a shorter taxi after landing. The pilot lost directional control of the airplane and attempted "to fly out of it." The pilot increased the throttle and "pulled the airplane up out of ground effect." The airplane stalled approximately 30 feet agl, descended, and impacted terrain in a nose low attitude. At the time of the accident, the pilot estimated the wind to be from 330 degrees at 5 knots. The pilot reported that both wings, the empennage, and nose of the airplane sustained substantial damage. The pilot noted no mechanical anomalies with the airplane during the accident flight. At the time of the accident, the pilot had accumulated approximately 15 hours in the accident airplane. ## Aircraft - Registration: [N477DK](https://openairdocs.org/aircraft/N477DK), registered now, S/N 2160 (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&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 2160 - Airframe hours: 188 - Engines: Lycoming 0-360-AIP 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: PNA Holdings LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 1, 2005, 77 hours before - Departed: SHR, Sheridan, WY - Destination: SHR, Sheridan, WY - Airport: SHR, Sheridan County airport, runway 32, 8,300 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, with waivers/limitations; seat: left; flight hours: 1,813 total, 16 in this make and model, 1,709 as pilot in command, 52 in the last 90 days, 24 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 5 knots, gusting 5 - Visibility: 20 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 43 °F - Altimeter: 30.06 inHg ## 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 20050907019999A](https://openairdocs.org/incident/20050907019999A), Sep 7, 2005: Aviat A1B, Sheridan, WY, Substantial damage. (-23) Pilot failed to configure flaps properly for the "go" portion of his fourth touch and go. 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.