# NTSB NYC01LA083: Cessna 172S, N574SP, Keene, NH, March 7, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 7, 2001, 13:10 local (18:10 UTC) - Place: Keene, NH - Coordinates: 42.949108, -72.289024 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=42.9491&lon=-72.2890&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 30, 2001 - Report: Approved by Office Director - Parties: FAA/FSDO - NTSB case key (mKey): 53375 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC01LA083 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53375/pdf - Page: https://openairdocs.org/ntsb/NYC01LA083 ## Probable cause The pilot's failure to maintain directional control during the landing roll. A factor included the patchy snow on the runway. ## 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) - airport facilities,runway/landing area condition - foreign substance covered (contributing factor) ## Analysis The pilot flew a normal approach, and landed the airplane, with the throttle closed, on a runway with patches of slushy snow and ice, and some blowing dry snow. The airplane touched down on centerline, about 60 knots, and the pilot kept his feet off the brakes during rollout. About 500 feet into the rollout, the airplane began to yaw, then slowly veer and skid to the left. The pilot attempted to straighten the airplane by increasing right rudder pressure. He also considered aborting the landing, but given the airplane's slow speed, and its proximity to a 4-foot snow bank, he decided an abort would be unsuccessful. The airplane continued to veer to the left, and hit the snow bank at approximately a 30-degree angle, about 30 miles per hour. Winds, about the time of the accident, were from approximately 15 degrees left of the runway, at 5 knots. The pilot had 92 hours of flight time, with previous experience landing on contaminated runways. ## Factual narrative On March 7, 2001, about 1310 Eastern Standard Time, a Cessna 172S, N574SP, was substantially damaged when it impacted a snow bank during a landing rollout at Dillant-Hopkins Airport (EEN), Keene, New Hampshire. The certificated private pilot was not injured. Visual meteorological conditions prevailed for the flight, which was operating on a visual flight rules flight plan between Lebanon Municipal Airport (LEB), Lebanon, New Hampshire, and Keene. The personal flight was conducted under 14 CFR Part 91. According to the pilot, he checked the weather several times before the flight, and received a NOTAM that Dillant-Hopkins runway conditions were reported as "clear, with patches of packed snow and ice." The pilot decided, "since I had continued instruction throughout the winter months, and had experience in takeoffs and landings on other than dry runways, I felt I was within my personal minimums to safely complete the flight." The airplane departed about 1250, and except for occasional light turbulence, the flight was uneventful. The pilot began monitoring Keene UNICOM and AWOS about 22 miles from the airport, and about 9 miles from the airport, received an advisory over the UNICOM frequency, which confirmed that winds were variable, between 320 and 020 degrees, at 6 knots, and that Runway 02 was open, "with patches of packed snow and ice." The pilot entered the pattern, and flew a normal approach. He landed, with the throttle closed, on centerline, about 500 feet from the approach end of Runway 02. "Touchdown was on the main gear, nose high, at 60 KIAS." Because of the runway's length, and the reports of patches of snow and ice, the pilot kept his feet off the brakes, "and expected a long rollout." About 500 feet into the rollout, "the right main tire lost traction, and the aircraft began to yaw, then slowly veer and skid to the left." He attempted to straighten the airplane out, by increasing right rudder pressure, and considered aborting the landing. However, given the airplane's slow speed, and its proximity to a 4-foot snow bank, he decided that an abort would be unsuccessful. The airplane continued to veer to the left, and hit the snow bank at an approximately 30-degree angle, at a speed the pilot estimated to be about 30 miles per hour. The engine stalled upon impact with the snow bank, an engine mount was bent, and the right wing was "severely bent." Winds, recorded at the airport 5 minutes after the accident, were from 350 degrees true, at 5 knots. Magnetic variation was 15 degrees west. The pilot noted, that in the area where he had lost control of the airplane, the runway had appeared, from the air, to have been covered with packed snow. However, after the accident, the pilot saw that there had actually been three patches of slushy wet snow, and some loose snow had blown onto the runway as well, and not completely melted or compacted. The pilot had 92 hours of flight time. ## Aircraft - Registration: [N574SP](https://openairdocs.org/deregistered/N574SP-2011-02-25), registration cancelled 2011-02-25, S/N 172S8500, built 2000 (OpenAirDocs) - Reported make and model: Cessna 172S - Registry model: [Cessna 172S](https://openairdocs.org/model/cessna-172s) (registry code 2072439) (OpenAirDocs) - Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 172S8500 - Airframe hours: 296 - Engines: Lycoming IO-360 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Signal Aviation Services, Inc. - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, March 2, 2001, 4 hours before - Departed: LEB, Lebanon, NH - Destination: EEN, Keene, NH - Flight plan: VFR - Airport: EEN, Dillant-Hopkins, runway 02, 6,201 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 48; injuries: none; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; last flight review January 13, 2001; seat: left; flight hours: 92 total, 92 in this make and model, 31 as pilot in command, 21 in the last 90 days, 7 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 350° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 36 °F, dew point 19 °F - Altimeter: 29.75 inHg - Observed at: EEN ## 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 20010307003339A](https://openairdocs.org/incident/20010307003339A), Mar 7, 2001: Cessna 172S, Keene, NH, Substantial damage. (-23) During landing roll on runway 02 at Keene airport, the pilot encountered a patch of slush on the runway apparently caused by melting snow from the… 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.