# NTSB ERA12CA592: Learjet 36A, New Haven, CT, September 20, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: September 20, 2012, 14:02 local (18:02 UTC) - Place: New Haven, CT - Coordinates: 41.258056, -72.886665 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.2581&lon=-72.8867&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff-rejected takeoff: Wildlife encounter (non-bird)](https://openairdocs.org/ntsb-events/310) - Highest injury: No injuries - Injuries: 5 uninjured - Status: Completed, report April 10, 2013 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 85419 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA12CA592 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/85419/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=85419 - Page: https://openairdocs.org/ntsb/ERA12CA592 ## Probable cause An inadvertent collision with a deer during the takeoff 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 · Ability to respond/compensate (probable cause); cases with it: [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. - [Takeoff-rejected takeoff: Wildlife encounter (non-bird)](https://openairdocs.org/ntsb-events/310) (defining event); cases with it: [All aircraft, 107 cases](https://openairdocs.org/ntsb-events/310/sequence.md) - [Takeoff-rejected takeoff: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis According to the pilot, during the takeoff roll, he noticed two deer on the right side of the runway that were moving into the path of the airplane. He aborted the takeoff and applied maximum braking, but the airplane subsequently struck a deer with the right wing, resulting in substantial damage to the spar. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. Airport personnel indicated that deer are not a known problem at the airport and that postaccident discussions between airport personnel and the Federal Aviation Administration (FAA) are underway to install a full airport perimeter fence. In addition, the airport readjusted the agreement with the United States Department of Agriculture Wildlife Management Division in order to improve wildlife hazard mitigation strategies. ## Factual narrative According to the pilot, during the takeoff roll, he noticed two deer on the right side of the runway that were moving into the path of the airplane. He announced to abort the takeoff and applied maximum braking aborting the takeoff, but the airplane subsequently struck a deer with the right wing resulting in substantial damage to the spar. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation. Airport personnel indicated that deer are not a known problem at the airport, and that postaccident discussions between airport personnel and the Federal Aviation Administration (FAA) are underway to install a full airport perimeter fence. In addition, the airport readjusted the agreement with the United States Department of Agriculture Wildlife Management Division in order to improve wildlife hazard mitigation strategies. ## Aircraft - Registration: C-FEMT (not matched to a registry record) - Reported make and model: LEARJET 36A - Category: Airplane - Serial number: 024 - Airframe hours: 21086 - Engines: Honeywell TFE731-2B-2C 3500 lbs thrust turbo fan; Honeywell TFE731-2B-2C 3500 lbs thrust turbo fan - Damage: Substantial damage - Flight: Part 129 - Operator: Fox Flight, Inc. - Registered owner: Fox Flight, Inc. - Airworthiness certificate: Standard, Transport - Last inspection: Continuous airworthiness, July 30, 2012 - Departed: HVN, New Haven, CT - Destination: CYYR, Goose Bay - Flight plan: IFR - Airport: HVN, Tweed-New Haven Airport, runway 20, 5,600 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 39; injuries: none; airline transport; airplane ratings: multi-engine sea, single-engine sea, multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review July 9, 2012; seat: left; flight hours: 5,300 total, 3,300 in this make and model, 4,800 as pilot in command, 158 in the last 90 days, 44 in the last 30 days, 2 in the last 24 hours - Co-pilot; age 31; injuries: none; commercial, foreign; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review June 24, 2012; seat: right; flight hours: 1,928 total, 121 in this make and model, 270 as pilot in command, 121 in the last 90 days, 45 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 120° at 11 knots, gusting 18 - Visibility: 10 statute miles - Lowest ceiling: 25,000 ft broken - Temperature: 68 °F, dew point 54 °F - Altimeter: 30.17 inHg - Observed at: HVN ## Docket (5 files) The files NTSB released with the investigation on February 11, 2013, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=85419. 1.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 434 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40381810&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - HVN Weather Observations (item 2, .PDF, 392 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40381812&FileExtension=.PDF&FileName=HVN%20Weather%20Observations-Master.PDF - Airport Incident Report (item 3, .PDF, 267 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40381708&FileExtension=.PDF&FileName=Airport%20Incident%20Report-Redacted.PDF - Memorandum of Record: Airport Employee (item 4, .PDF, 328 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40381715&FileExtension=.PDF&FileName=Memorandum%20of%20Record%3A%20Airport%20Employee-Master.PDF - Photo of Damaged Right Wing (Courtesy of FAA) (item 5, .PDF, 1 photo, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40381713&FileExtension=.PDF&FileName=Photo%20of%20Damaged%20Right%20Wing%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.