# NTSB CEN09CA452: Weatherly 620B, N2027K, New England, ND, July 21, 2009 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Data collection · Final report - Date: July 21, 2009, 07:30 local (13:30 UTC) - Place: New England, ND - Coordinates: 46.464443, -102.990837 - Nearby events: https://openairdocs.org/map.md?lat=46.4644&lon=-102.9908&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: Minor injuries - Injuries: 1 minor - Status: Completed, report April 28, 2011 - Report: Approved by Office Director - NTSB office: Central Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 74336 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN09CA452 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/74336/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=74336 - Page: https://openairdocs.org/ntsb/CEN09CA452 ## Probable cause The loss of engine power for undetermined reasons while maneuvering at low altitude. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Aircraft](https://openairdocs.org/ntsb-findings/01060000): Aircraft › Aircraft oper/perf/capability · Not specified (probable cause); cases with it: [Weatherly 620B, 1 case](https://openairdocs.org/ntsb-findings/01060000/cases.md?model=9630605), [All aircraft, 63 cases](https://openairdocs.org/ntsb-findings/01060000/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Weatherly 620B, 2 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=9630605), [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: [Weatherly 620B, 2 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=9630605), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) - [Emergency descent: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342); cases with it: [Weatherly 620B, 2 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=9630605), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) - [Landing-flare/touchdown: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Weatherly 620B, 9 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=9630605), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot had completed the aerial application of a field and was planning to spray another agricultural field when the airplane experienced a partial loss of engine power. The pilot stated that when he applied engine power while executing a climbing right turn over the field, the engine lost power. His attempts to increase power with the throttle further reduced engine power. The pilot then executed a forced landing on a butte, which resulted in substantial damage to the airplane. ## Factual narrative The pilot had completed the aerial application of a field prior to spraying another agricultural field where the airplane experienced a partial loss of engine power. The pilot stated that when he applied engine power while executing a climbing right turn over the field, the engine lost power. Additional increases of the throttle control further reduced engine power. The pilot stated that had he not changed or reduced the throttle control setting, the engine would have not lost power. The pilot then executed a forced landing on a butte, which resulted in substantial damage to the airplane. The pilot was uninjured. No mechanical anomalies relating to the airplane were reported. ## Aircraft - Registration: [N2027K](https://openairdocs.org/deregistered/N2027K-2018-01-03), registration cancelled 2018-01-03, S/N 1577, built 1994 (OpenAirDocs) - Reported make and model: WEATHERLY AVIATION CO INC 620B - Registry model: [Weatherly 620B](https://openairdocs.org/model/weatherly-620b) (registry code 9630605) (OpenAirDocs) - Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1577 - Airframe hours: 2398 - Engines: Pratt & Whitney R-985AN-14B 450 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: Air Dakota Flite, Inc. - Registered owner: Air Dakota Flite, Inc. - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, July 2, 2008 - Departed: HEI, Hettinger, ND - Destination: New England, ND ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; injuries: none; commercial; airplane ratings: multi-engine land, single-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review March 27, 2009; seat: center; flight hours: 17,831 total, 372 in this make and model ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Lowest ceiling: none - Observed at: OVA ## Docket (1 files) The files NTSB released with the investigation on August 28, 2009, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=74336. 531 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 531 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40317951&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-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.