# NTSB WPR11CA099: Diamond DA20C1, N376DC, Spanish Fork, UT, January 14, 2011 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: January 13, 2011, 19:51 local (Jan 14, 2011, 02:51 UTC) - Place: Spanish Fork, UT - Coordinates: 40.141666, -111.661392 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.1417&lon=-111.6614&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report May 26, 2011 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: FAA FSDO - NTSB case key (mKey): 78160 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR11CA099 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/78160/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=78160 - Page: https://openairdocs.org/ntsb/WPR11CA099 ## Probable cause The pilot’s failure to maintain directional control during landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis The pilot stated that the approach and landing were uneventful through touchdown. He landed on the center of the runway, but the airplane started to drift to the left. He added right rudder with some brake pressure, which slowed the drift to the left, but did not completely stop it. He continued these inputs, but the left main tire caught a snow bank. After traveling a few hundred feet, the airplane spun 90 degrees into the snowbank. The operator reported that there were left tire skid marks as the airplane exited the runway, and opined that either the pilot or passenger had their foot on the left brake pedal. The operator issued a new caution to all of its instructors and pilots regarding the use of brakes on touchdown and rollout and reminded them to brief all front seat passengers to keep their feet off the rudder and brake pedals. ## Factual narrative The pilot stated that the approach and landing were uneventful through downwind, base, final approach, and touchdown. He landed on the center of the runway, but the airplane started to drift/pull to the left. He pressed right rudder with some brake pressure, which slowed the drift to the left, but did not totally stop it. He continued these inputs, but the left main tire caught a snow bank. After traveling a few hundred feet, the airplane spun 90 degrees into the snowbank. The operator reported that there were left tire skid marks as the airplane exited the runway, and opined that either the pilot or passenger had their foot on the left brake pedal. The operator issued a new caution to all of its instructors and pilots regarding the use of brakes on touchdown and roll out, and reminded them to brief all front seat passengers to keep their feet off the rudder and brake pedals. ## Aircraft - Registration: N376DC (not matched to a registry record) - Reported make and model: DIAMOND DA20C1 - Category: Airplane - Serial number: CO376 - Airframe hours: 2237 - Engines: Teledyne Continental motors IO-240-B 125 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: American Flight Center - Registered owner: Allairus LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, November 20, 2010 - Departed: CNY, Moab, UT - Destination: U77, Spanish Fork, UT - Airport: U77, Spanish Fork, runway 12, 5,700 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 43; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review October 22, 2010; seat: left; flight hours: 92 total, 892 in this make and model, 25 as pilot in command, 23 in the last 90 days, 9 in the last 30 days ## Weather - Conditions: Visual (VMC), Night - Wind: variable at 5 knots - Visibility: 10 statute miles - Lowest ceiling: 3,600 ft broken - Temperature: 30 °F, dew point 25 °F - Observed at: KPVU ## Docket (1 files) The files NTSB released with the investigation on February 17, 2011, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=78160. 430 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 430 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40343037&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF 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.