# NTSB ANC05CA083: Cessna 170B, N2830C, Anchorage, AK, June 12, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: June 12, 2005, 10:30 local (18:30 UTC) - Place: Anchorage, AK - Coordinates: 61.213611, -149.844451 - Nearby events: https://openairdocs.org/map.md?lat=61.2136&lon=-149.8445&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report October 27, 2005 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 61682 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC05CA083 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61682/pdf - Page: https://openairdocs.org/ntsb/ANC05CA083 ## Probable cause The pilot's inadequate compensation for the wind conditions during the landing roll, which resulted in a loss of control and an inadvertent ground-loop. A factor associated with the accident was a crosswind. ## 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 - compensation for wind conditions - inadequate, pilot in command (cause) - weather condition - crosswind (contributing factor) - ground loop/swerve - inadvertent, pilot in command - Main gear collapsed, landing - roll - terrain condition - runway ## Analysis The private pilot reported that the automatic terminal information service at the landing airport indicated the surface wind was from 040 degrees at 6 knots. During the landing roll on runway 6, the pilot stated the left wing lifted, and he lost directional control. The airplane ground-looped to the left, and the right main landing gear collapsed. The airplane sustained structural damage to the landing gear, fuselage, and left wing. The official weather observation taken at the time of the accident indicated that the wind was from 030 degrees at 9 knots. The pilot stated that there were no preaccident mechanical problems with the airplane. ## Factual narrative On June 12, 2005, about 1030 Alaska daylight time, a Cessna 170B, N2830C, sustained substantial damage when it ground-looped following a loss of control during landing at Merrill Field, Anchorage, Alaska. The airplane was being operated by the pilot as a visual flight rules (VFR) personal local flight under Title 14, CFR Part 91, when the accident occurred. The private pilot and passenger were not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on June 6, the pilot said he landed on runway 06. He said the Automatic Terminal Information Service (ATIS) was reporting the wind from 040 degrees at 6 knots, but he thought it was more of a direct crosswind, and gusting. The official weather observation for Merrill Field at 1030 reported the wind was from 030 degrees at 9 knots. The pilot said that during the landing roll, the left wing lifted, and he lost directional control. The airplane ground-looped to the left, and the right main landing gear collapsed. The airplane sustained damage to the propeller, main landing gear, fuselage, and left wing. ## Aircraft - Registration: [N2830C](https://openairdocs.org/deregistered/N2830C-2012-02-24), registration cancelled 2012-02-24, S/N 26373, built 1954 (OpenAirDocs) - Reported make and model: Cessna 170B - Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs) - Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 26373 - Engines: Continental O-300-A reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Craig J. Keppers - Airworthiness certificate: Standard, Normal; Standard, Utility - Departed: MRI, Anchorage, AK - Flight plan: VFR - Airport: MRI, Merrill Field, runway 06 ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; injuries: none; private; airplane ratings: single-engine land; medical: class 3; last flight review August 1, 2003; flight hours: 190 total, 114 in this make and model, 23 in the last 90 days, 8 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 9 knots - Visibility: 10 statute miles - Lowest ceiling: 7,000 ft broken - Observed at: MRI ## 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 20050612015009A](https://openairdocs.org/incident/20050612015009A), Jun 12, 2005: Cessna 170B, Anchorage, AK, Substantial damage. (-23) The pilot was returning to Merrill field after about a 3 hour flight and upon landing on runway 06 with about a 9 knot wind, he lost directional control… 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.