# NTSB WPR23LA300: Cessna 170B, N2771C, Tracy, CA, May 17, 2023

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: May 17, 2023, 15:59 local (22:59 UTC)
- Place: Tracy, CA
- Coordinates: 37.688895, -121.44157
- Nearby events: https://openairdocs.org/map.md?lat=37.6889&lon=-121.4416&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: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- Investigation class: Class 4 - Basic report with no Prelim publish
- NTSB office: Western Pacific Region
- Parties: FAA Oakland FSDO
- NTSB case key (mKey): 192782
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR23LA300
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/192782/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=192782
- Page: https://openairdocs.org/ntsb/WPR23LA300

## Probable cause

The pilot’s failure to maintain directional control during the landing roll after encountering a wind gust.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cessna 170B, 91 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2072306), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Wind: sudden wind shift](https://openairdocs.org/ntsb-findings/03034010): Environmental issues › Conditions/weather/phenomena · Effect on operation (probable cause); cases with it: [Cessna 170B, 2 cases](https://openairdocs.org/ntsb-findings/03034010/cases.md?model=2072306), [All aircraft, 114 cases](https://openairdocs.org/ntsb-findings/03034010/cases.md)
- [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Contributed to outcome (probable cause); cases with it: [Cessna 170B, 13 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=2072306), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md)
- [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 170B, 74 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2072306), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/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: Other weather encounter](https://openairdocs.org/ntsb-events/400); cases with it: [Cessna 170B, 12 cases](https://openairdocs.org/ntsb-events/400/sequence.md?model=2072306), [All aircraft, 1,127 cases](https://openairdocs.org/ntsb-events/400/sequence.md)
- [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 170B, 84 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2072306), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md)

## Analysis

The pilot reported that during the landing roll a wind gust caused the left wing to raise. The pilot was unable to maintain directional control and came to rest adjacent to the runway. The airplane sustained substantial structural damage to its wing. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

## Aircraft

- Registration: [N2771C](https://openairdocs.org/aircraft/N2771C), registered now, S/N 26315, 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: 26315
- Year built: 1954
- Engines: CONT MOTOR C145 SERIES 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Kenmore Crew Leasing Inc Trustee
- Registered owner: Kenmore Crew Leasing Inc Trustee
- Airworthiness certificate: Standard, Normal
- Departed: KTRM, Palm Springs, CA
- Destination: KTCY, Tracy, CA
- Airport: TCY, Tracy Muni, runway 30, 4,001 × 75 ft, asphalt
- Equipment: ADS-B

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; injuries: none; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review June 16, 2023; seat: left; flight hours: 1,089 total, 8 in this make and model, 1,003 as pilot in command, 148 in the last 90 days, 70 in the last 30 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 11 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 91 °F, dew point 39 °F
- Altimeter: 29.84 inHg
- Observed at: KTCY
- METAR: METAR KTCY 172255Z AUTO 30011KT 10SM CLR 33/04 A2984 RMK A01=

## 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 20230517020809A](https://openairdocs.org/incident/20230517020809A), May 17, 2023: Cessna 170B, Tracy, CA, Substantial damage. On may 17, 2023 departure from ktrm. Weather reported, forecast enroute, and arrival to ktcy was VFR. Coming into the airport pilot listened to the AWOS, winds…

## Other investigations on N2771C (1)

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.

- [NTSB ANC73FAD04](https://openairdocs.org/ntsb/ANC73FAD04), Nov 12, 1972: Cessna 170B (N2771C), Wrangell, AK, substantial damage

## Docket (2 files)

The files NTSB released with the investigation on December 21, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=192782. 2.3 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16420563&FileExtension=pdf&FileName=N2271C%206120_Redacted-Rel.pdf
- Photos (item 2, PDF, 2 pages, 264 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16420439&FileExtension=pdf&FileName=Accident%20Photographs%20N2271C-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.

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