# NTSB CEN13LA390: Rockwell S-2R, N2249U, Boise City, OK, June 12, 2013 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 12, 2013, 09:38 local (14:38 UTC) - Place: Boise City, OK - Coordinates: 36.774166, -102.510276 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.7742&lon=-102.5103&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering-low-alt flying: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 16, 2016 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA FSDO Lubbock - NTSB case key (mKey): 87367 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN13LA390 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/87367/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=87367 - Page: https://openairdocs.org/ntsb/CEN13LA390 ## Probable cause The total loss of engine power for reasons that could not be determined because postaccident examination of the engine and fuel system revealed no anomalies. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Rockwell International S-2R, 6 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=7630202), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering-low-alt flying: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [Rockwell International S-2R, 7 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=7630202), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) ## Analysis The private pilot reported that the purpose of the flight was to apply pesticides to a field. The takeoff and transit to the work area were normal; however, after he had conducted a few spray runs, the engine power began to degrade. The pilot decided to fly the airplane back to the airport. The engine power continued to degrade, so the pilot moved the fuel boost pump switch to the "on" position; however, the engine then lost total power, and the pilot was forced to land the airplane in a cornfield about 3 miles from the airport. During the forced landing, the left main landing gear collapsed, and the airplane ground looped, which resulted in substantial damage to the fuselage and wings. A postaccident examination of the fuel system and the engine revealed no anomalies. ## Factual narrative On June 12, 2013, at 0938 central daylight time, a Rockwell S2R agricultural airplane, N2249U, registered to Farmer Aerial AG LLC of Boise City, Oklahoma, sustained substantial damage during a forced landing after a loss of engine power near the Boise City Airport (17K), Boise City, Oklahoma. The commercial pilot was not injured. The aerial application flight was being conducted under the provisions of Federal Code of Regulations Part 137. Visual meteorological conditions prevailed and no flight plan was filed. The flight originated at 0915 from the Boise City Airport. The pilot reported that the intent of the flight was to apply pesticides to a field about 5 miles south of 17K. The takeoff and transit to the work area was normal, however, several minutes after a few spray runs, engine power began to degrade. The pilot decided to fly the airplane back to the airport. The engine power continued to degrade so the pilot switched the fuel boost pump switch to the "ON" position. The engine then completely stopped producing power and the pilot was forced to land the airplane in a corn field about 3 miles from the airport. During the forced landing, the left main landing gear collapsed and the airplane ground looped resulting in substantial damage to the fuselage and wings. After the airplane came to rest, the pilot exited the airplane without injury. The operator examined the fuel system and the engine following the accident. No anomalies were found to explain the loss of engine power. ## Aircraft - Registration: [N2249U](https://openairdocs.org/aircraft/N2249U), registered now, S/N 1871R, built 1974 (OpenAirDocs) - Reported make and model: ROCKWELL S-2R - Registry model: [Rockwell International S-2R](https://openairdocs.org/model/rockwell-international-s-2r) (registry code 7630202) (OpenAirDocs) - Registry engine: [Pratt & Whitney Canada PT6A-41](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-41) (registry code 52265, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 1871R - Engines: WALTER M601 SER 751 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Farmer Aerial AG LLC, doing business as Farmer Aerial AG LLC - Registered owner: Farmer Aerial AG LLC - Airworthiness certificate: Special, Restricted (Special) - Departed: 17K, Boise City, OK - Destination: 17K, Boise City, OK - Airport: 17K, Boise City ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 75; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; seat: center; restraint: 4-point; flight hours: 5,000 total, 2,000 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 270° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 77 °F, dew point 46 °F - Altimeter: 30.06 inHg - Observed at: DHT, 44 nm away ## 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 20130612010469A](https://openairdocs.org/incident/20130612010469A), Jun 12, 2013: Rockwell International S-2R, Boise City, OK, Substantial damage. On June 12, 2013, N2249U, a Rockwell S-2R sustained substantial damage during a forced landing approximately 3 miles south of Boise City, Oklahoma. The pilot… ## Docket (2 files) The files NTSB released with the investigation on May 2, 2016, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=87367. 212 KB in all. - Operator Statement (item 1, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40439537&FileExtension=.PDF&FileName=Operator%20Statement-Master.PDF - Photos (item 2, .PDF, 3 photos, 171 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40439538&FileExtension=.PDF&FileName=Photos-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.