# NTSB GAA18CA155: Learjet 31, N500MP, Mount Pleasant, MI, March 10, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 10, 2018, 18:45 local (23:45 UTC) - Place: Mount Pleasant, MI - Coordinates: 43.621665, -84.73722 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.6217&lon=-84.7372&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: 9 uninjured - Status: Completed, report August 27, 2018 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 96853 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA155 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/96853/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=96853 - Page: https://openairdocs.org/ntsb/GAA18CA155 ## Probable cause The airplane’s collision with deer during the landing roll. ## 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: [Learjet 31A, 1 case](https://openairdocs.org/ntsb-findings/03022045/cases.md?model=5170531), [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: [Learjet 31A, 1 case](https://openairdocs.org/ntsb-events/310/sequence.md?model=5170531), [All aircraft, 107 cases](https://openairdocs.org/ntsb-events/310/sequence.md) ## Analysis The pilot reported that during the landing roll, the airplane collided with two deer. The airplane sustained substantial damage to the leading edge of the left wing. According to the Federal Aviation Administration, Airport/Facility Directory for the accident airport, deer may be located on, and in vicinity of the airport. The pilot reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Factual narrative The pilot reported that during the landing roll, the airplane collided with two deer. The airplane sustained substantial damage to the leading edge of the left wing. According to the Federal Aviation Administration, Airport/Facility Directory for the accident airport, deer may be located on, and in vicinity of the airport. The pilot reported that there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N500MP](https://openairdocs.org/aircraft/N500MP), registered now, S/N 198, built 2000 (OpenAirDocs) - Reported make and model: LEARJET INC 31 (A) - Registry model: [Learjet 31A](https://openairdocs.org/model/learjet-31a) (registry code 5170531) (OpenAirDocs) - Registry engine: [Alliedsign TFE-731-2B](https://openairdocs.org/engine/alliedsign-tfe-731-2b) (registry code 02502, turbo-jet) (OpenAirDocs) - Category: Airplane - Serial number: 198 - Year built: 2000 - Engines: Honeywell TFE731 3500 horsepower turbo jet; Honeywell TFE732 1550 horsepower turbo jet - Damage: Substantial damage - Flight: Business, Part 91 - Operator: N500mp LLC - Registered owner: N500mp LLC - Airworthiness certificate: Standard, Normal - Departed: ULS, ULYSSES, KS - Destination: MOP, Mt. Pleasant, MI - Flight plan: IFR - Airport: MOP, Mount Pleasant Muni, runway 27, 5,000 × 100 ft, asphalt - Equipment: Stall warning system, Onboard weather, Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device, Data recorder, Auto-pilot, ADS-B, Angle of attack indicator ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review September 1, 2017; seat: left; restraint: 4-point; flight hours: 9,100 total, 3,000 in this make and model, 6,500 as pilot in command, 120 in the last 90 days, 47 in the last 30 days - Co-pilot; age 55; injuries: none; commercial, flight instructor, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review October 6, 2017; seat: right; restraint: 5-point; flight hours: 12,000 total, 300 in this make and model, 75 in the last 90 days, 35 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: 5,500 ft overcast - Temperature: 28 °F, dew point 19 °F - Altimeter: 30.13 inHg - Observed at: KMOP ## 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 20180310001859A](https://openairdocs.org/incident/20180310001859A), Mar 10, 2018: Learjet Inc 31A, Mt. Pleasant, MI, Substantial damage. On March 10, 2018 at 1730 eastern time, a lear 31 aircraft, N500MP, registered to a corporation and operated by an airline transport pilot, received… ## Docket (2 files) The files NTSB released with the investigation on June 20, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=96853. 3.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40464244&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40464245&FileExtension=.PDF&FileName=Photo%20(Courtesy%20of%20FAA)-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.