# NTSB ERA12CA347: Cessna 172R, N456MB, Crossville, TN, May 20, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 20, 2012, 12:30 local (17:30 UTC) - Place: Crossville, TN - Coordinates: 35.950553, -85.084167 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.9506&lon=-85.0842&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: 1 uninjured - Status: Completed, report November 26, 2012 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 83708 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA12CA347 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/83708/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=83708 - Page: https://openairdocs.org/ntsb/ERA12CA347 ## Probable cause The pilot's attempt to avoid a deer on the runway, which resulted in a runway excursion. ## 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 operation (probable cause) ## Analysis According to the pilot, during the landing roll he noticed a deer on the runway. In an attempt to avoid hitting the deer, he applied the brakes and the airplane skidded off the runway and collided with a ditch. The postaccident examination of the airplane revealed that it sustained substantial damage to the firewall. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Factual narrative According to the pilot, during the landing roll he noticed a deer on the runway. In an attempt to avoid hitting the deer he applied the brakes and the airplane skidded off of the runway. The airplane continued off of the runway and collided into a ditch. The post accident examination of the airplane revealed that it sustained substantial damage to the firewall. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## 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) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470) ## Aircraft - Registration: [N456MB](https://openairdocs.org/aircraft/N456MB), registered now, S/N 17280033, built 1997 (OpenAirDocs) - Reported make and model: CESSNA 172R - Registry model: [Cessna 172R](https://openairdocs.org/model/cessna-172r) (registry code 2072401) (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: 17280033 - Engines: LYCOMING IO360 SER A&C 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Citadel Aviation LLC - Registered owner: Citadel Aviation LLC - Airworthiness certificate: Standard, Normal - Departed: TRI, Blountville, TN - Destination: CSV, Crossville, TN - Airport: CSV, Crossville Memorial Airport, runway 08, 5,418 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 64; injuries: none; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; seat: left; flight hours: 300 total, 172 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 10° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 75 °F, dew point 55 °F - Altimeter: 30.17 inHg - Observed at: CSV ## 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 20120520008239A](https://openairdocs.org/incident/20120520008239A), May 20, 2012: Cessna 172R, Crossville, TN, Substantial damage. Pilot stated that, on initial landing, he saw a deer and took evasive action. Aircraft departed hard surface runway and struck dirt ditch line. ## Docket (5 files) The files NTSB released with the investigation on August 30, 2012, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=83708. 2.3 MB in all. - FAA statement (item 1, .PDF, 128 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40368988&FileExtension=.PDF&FileName=FAA%20statement-Redacted.PDF - Record of Conversation-Hoffer (item 2, .PDF, 51 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40368990&FileExtension=.PDF&FileName=Record%20of%20Conversation-Hoffer-Master.PDF - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 3, .PDF, 13 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40368991&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Photo 1-Courtesy of FAA-Rear view of nosed over airplane (item 4, .PDF, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40369795&FileExtension=.PDF&FileName=Photo%201-Courtesy%20of%20FAA-Rear%20view%20of%20nosed%20over%20airplane-Master.PDF - Photo 2-Courtesy of FAA- Buckled firewall (item 5, .PDF, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40369805&FileExtension=.PDF&FileName=Photo%202-Courtesy%20of%20FAA-%20Buckled%20firewall-Master.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.