# NTSB WPR23LA315: Cessna 172M, N20268, Marysville, CA, August 10, 2023 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: August 10, 2023, 14:05 local (21:05 UTC) - Place: Marysville, CA · On airport - Coordinates: 39.0977, -121.5698 - Nearby events: https://openairdocs.org/map.md?lat=39.0977&lon=-121.5698&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Runway excursion](https://openairdocs.org/ntsb-events/300) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 192871 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR23LA315 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/192871/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=192871 - Page: https://openairdocs.org/ntsb/WPR23LA315 ## Probable cause The flight instructor’s failure to monitor the airplane’s speed during a high-speed taxi, resulting in a runway excursion. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Attention/monitoring: monitoring equip/instruments](https://openairdocs.org/ntsb-findings/02021525): Personnel issues › Psychological · Instructor/check pilot (probable cause); cases with it: [Cessna 172M, 1 case](https://openairdocs.org/ntsb-findings/02021525/cases.md?model=2072418), [All aircraft, 142 cases](https://openairdocs.org/ntsb-findings/02021525/cases.md) - [Info processing/decision: decision making/judgment](https://openairdocs.org/ntsb-findings/02041520): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Cessna 172M, 36 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md?model=2072418), [All aircraft, 3,098 cases](https://openairdocs.org/ntsb-findings/02041520/cases.md) - [Info processing/decision: understanding/comprehension](https://openairdocs.org/ntsb-findings/02041515): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Cessna 172M, 3 cases](https://openairdocs.org/ntsb-findings/02041515/cases.md?model=2072418), [All aircraft, 70 cases](https://openairdocs.org/ntsb-findings/02041515/cases.md) - [Aircraft](https://openairdocs.org/ntsb-findings/01060000): Aircraft › Aircraft oper/perf/capability · Incorrect use/operation (probable cause); cases with it: [Cessna 172M, 3 cases](https://openairdocs.org/ntsb-findings/01060000/cases.md?model=2072418), [All aircraft, 63 cases](https://openairdocs.org/ntsb-findings/01060000/cases.md) - [Performance/control parameters: airspeed](https://openairdocs.org/ntsb-findings/01062010): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 172M, 24 cases](https://openairdocs.org/ntsb-findings/01062010/cases.md?model=2072418), [All aircraft, 1,681 cases](https://openairdocs.org/ntsb-findings/01062010/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Taxi: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Cessna 172M, 19 cases](https://openairdocs.org/ntsb-events/060/sequence.md?model=2072418), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [Takeoff: Runway excursion](https://openairdocs.org/ntsb-events/300) (defining event); cases with it: [Cessna 172M, 51 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=2072418), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis The flight instructor reported that during an instructional flight, he was conducting a high-speed taxi exercise on the runway with a student pilot, to work on rudder control. He instructed the student to remain at or below 50 mph and that they would begin slowing the airplane about 1,000 ft from the departure end of the runway. About halfway down the length of the runway, the instructor noticed that the airspeed seemed high, and he informed the student that they needed to decrease the airplane’s speed; however, the airplane continued to accelerate. When the instructor told the student to begin their deceleration, the airplane did not decelerate as expected. As the airplane overran the runway, the instructor took the flight controls and elected to take off. The airplane was flown to the originating airport, where substantial damage to the horizontal stabilizer and elevator was discovered during postflight inspection, which resulted from impact with a runway end light during the runway excursion. The instructor reported that there were no preaccident mechanical malfunctions or failures that would have precluded normal operation. ## Aircraft - Registration: [N20268](https://openairdocs.org/aircraft/N20268), registered now, S/N 17261144, built 1972 (OpenAirDocs) - Reported make and model: CESSNA 172M - Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (registry code 2072418) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17261144 - Year built: 1972 - Airframe hours: 5782 - Engines: Lycoming O-320-E2D 160 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 19, 2023 - Departed: KAUN, Auburn, CA - Destination: Same as departure - Airport: MYV, Yuba County, runway 32, 6,007 × 150 ft, asphalt - Equipment: ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 60; injuries: none; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, waiver time limited special; last flight review September 2, 2022; seat: right; restraint: 3-point; flight hours: 849 total, 108 in this make and model, 765 as pilot in command, 122 in the last 90 days, 51 in the last 30 days, 2 in the last 24 hours - Student pilot; age 17; injuries: none; student; medical: class 3, without waivers/limitations; seat: left; restraint: 3-point; flight hours: 19 total, 19 in this make and model, 19 in the last 90 days, 10 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 84 °F, dew point 59 °F - Altimeter: 29.93 inHg - Observed at: MYV - METAR: METAR KMYV 112053Z AUTO VRB05KT 10SM CLR 29/15 A2993 RMK AO2 SLPNO T02940150 58015 ## 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 20230810014069A](https://openairdocs.org/incident/20230810014069A), Aug 10, 2023: Cessna 172M, Marysville, CA, Substantial damage. The pilot reported, in a written statement that he was attempting to give his student training on proper rudder application during takeoff. He decided it would… ## Docket (3 files) The files NTSB released with the investigation on November 30, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=192871. 2.7 MB in all. - Pilot cfi/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16127089&FileExtension=pdf&FileName=WPR23LA315_6120_flat_Redacted-Rel.pdf - Photos (item 2, PDF, 1 page, 319 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16127314&FileExtension=pdf&FileName=damage%20photo_508-Rel.pdf - Cfi's statement/full narrative from 6120.1 (item 3, PDF, 5 pages, 225 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16179206&FileExtension=pdf&FileName=CFI%20-%20N20268%20-%20Narrative%20History%20of%20Flight_Redacted-Rel.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.