# NTSB CEN22LA136: Cessna 172P, N99104, Pinckneyville, IL, March 4, 2022

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 4 · Limited · Final report
- Date: March 3, 2022, 18:45 local (Mar 4, 2022, 00:45 UTC)
- Place: Pinckneyville, IL · On runway at PJY
- Coordinates: 37.975803, -89.360492 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.9758&lon=-89.3605&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Defining event: [Landing-landing roll: Wildlife encounter (non-bird)](https://openairdocs.org/ntsb-events/310)
- 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: Central Region
- Parties: Federal Aviation Administration
- NTSB case key (mKey): 104734
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN22LA136
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104734/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=104734
- Page: https://openairdocs.org/ntsb/CEN22LA136

## Probable cause

The airplane’s collision with a deer on the runway during landing.

## Findings

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

- [Object/animal/substance: animal(s)/bird(s)](https://openairdocs.org/ntsb-findings/03022045): Environmental issues › Physical environment · Effect on equipment (probable cause); cases with it: [Cessna 172P, 6 cases](https://openairdocs.org/ntsb-findings/03022045/cases.md?model=2072436), [All aircraft, 358 cases](https://openairdocs.org/ntsb-findings/03022045/cases.md)
- [Object/animal/substance: animal(s)/bird(s)](https://openairdocs.org/ntsb-findings/03022045): Environmental issues › Physical environment · Contributed to outcome (probable cause); cases with it: [Cessna 172P, 6 cases](https://openairdocs.org/ntsb-findings/03022045/cases.md?model=2072436), [All aircraft, 358 cases](https://openairdocs.org/ntsb-findings/03022045/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: Wildlife encounter (non-bird)](https://openairdocs.org/ntsb-events/310) (defining event); cases with it: [Cessna 172P, 1 case](https://openairdocs.org/ntsb-events/310/sequence.md?model=2072436), [All aircraft, 107 cases](https://openairdocs.org/ntsb-events/310/sequence.md)

## Analysis

The flight instructor and student pilot were completing stop-and-go landings at night at an uncontrolled airport. During the second landing, a deer collided with the left rear fuselage and the empennage, then the airplane yawed left. The flight instructor took control of the airplane and taxied off the runway without further incident. The airplane sustained substantial damage to the left horizontal stabilizer.

## Aircraft

- Registration: [N99104](https://openairdocs.org/aircraft/N99104), registered now, S/N 17276403, built 1985 (OpenAirDocs)
- Reported make and model: CESSNA 172P
- Registry model: [Cessna 172P](https://openairdocs.org/model/cessna-172p) (registry code 2072436) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 17276403
- Year built: 1985
- Airframe hours: 15208.5
- Engines: Lycoming O-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Southern Illinois University
- Registered owner: Southern Illinois University
- Airworthiness certificate: Standard, Normal; Standard, Utility
- Last inspection: 100 hour, November 22, 2021
- Destination: Same as departure
- Airport: PJY, Pinckneyville-Du Quoin, runway 36, 3,999 × 60 ft, asphalt
- Equipment: Stall warning system, Electronic flight bag or handheld device, ADS-B

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Flight instructor; age 23; injuries: none; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review December 17, 2020; seat: right; restraint: 3-point; flight hours: 725 total, 74 in this make and model, 560 as pilot in command, 66 in the last 90 days, 39 in the last 30 days, 0.9 in the last 24 hours
- Student pilot; age 20; injuries: none; student; medical: class 2, with waivers/limitations; seat: left; restraint: 3-point; flight hours: 31 total, 22 in this make and model, 2.2 as pilot in command, 3.5 in the last 90 days, 3 in the last 30 days, 0 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night
- Wind: 40° at 9 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 46 °F, dew point 34 °F
- Altimeter: 30.29 inHg
- Observed at: KMDH, 13 nm away
- METAR: KMDH 040052Z 04009KT 10SM CLR 08/01 A3029 RMK AO2 SLP258 T00830011

## 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 20220303000249A](https://openairdocs.org/incident/20220303000249A), Mar 3, 2022: Cessna 172P, Pickneyville, IL, Substantial damage. At approximately 1845 CST on March 3, 2022, N99104 (callsign CBN9104), a Cessna CE-172, was conducting a flight training lesson. The aircraft struck a deer…

## Docket (2 files)

The files NTSB released with the investigation on April 6, 2022, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=104734. 2.4 MB in all.

- Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13395482&FileExtension=pdf&FileName=6120%20-%20pilot_Redacted-Rel.pdf
- Photos (item 2, PDF, 1 page, 620 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=13427467&FileExtension=pdf&FileName=Photos-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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