# NTSB CEN09LA401: Air Tractor AT-602, N5192T, Knobel, AR, June 30, 2009 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 29, 2009, 19:00 local (Jun 30, 2009, 00:00 UTC) - Place: Knobel, AR - Coordinates: 36.310173, -90.599349 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=36.3102&lon=-90.5993&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Defining event: [Maneuvering: Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 30, 2009 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA Flight Standards District Office - NTSB case key (mKey): 74177 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN09LA401 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/74177/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=74177 - Page: https://openairdocs.org/ntsb/CEN09LA401 ## Probable cause The failure of the P-3 tube resulting in the loss of engine power. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Engine bleed air system](https://openairdocs.org/ntsb-findings/01057500): Aircraft › Aircraft power plant · Failure (probable cause); cases with it: [Air Tractor AT-602, 1 case](https://openairdocs.org/ntsb-findings/01057500/cases.md?model=0390309), [All aircraft, 7 cases](https://openairdocs.org/ntsb-findings/01057500/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Maneuvering: Powerplant sys/comp malf/fail](https://openairdocs.org/ntsb-events/340) (defining event); cases with it: [Air Tractor AT-602, 4 cases](https://openairdocs.org/ntsb-events/340/sequence.md?model=0390309), [All aircraft, 820 cases](https://openairdocs.org/ntsb-events/340/sequence.md) - [Maneuvering: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342); cases with it: [Air Tractor AT-602, 3 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=0390309), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Air Tractor AT-602, 13 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=0390309), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) ## Analysis According to the commercial pilot, he was maneuvering the airplane to apply fertilizer to a customer's field when the engine lost power. The commercial pilot performed a forced landing to a flooded rice field resulting in substantial damage to the left wing spar and firewall. An examination of the engine revealed that the P-3 tube had failed. No other anomalies were noted with the airplane's airframe, engine, or related systems. ## Factual narrative On June 29, 2009, approximately 1900 central daylight time, an Air Tractor Incorporated AT-602, N5192T, owned and operated by R & W Flying Incorporated, was substantially damaged during a forced landing to a field near Knobel, Arkansas. Visual meteorological conditions prevailed at the time of the accident. The aerial application flight was being conducted under the provisions of Title 14 Code of Federal Regulations Part 137 without a flight plan. The commercial pilot was not injured. The local flight departed a private airstrip just prior to the accident. According to the commercial pilot, he was maneuvering the airplane to apply "fertilizer to a customer's field" when the engine lost power. The commercial pilot performed a forced landing to a "flooded rice field." An examination of the airframe revealed that the left wing spar was bent and the firewall wrinkled. The engine was examined under the auspices of a Federal Aviation Administration airworthiness inspector. The examination revealed that the P-3 tube had failed. No other anomalies were noted with the airplane, airframe, engine or related systems. ## Aircraft - Registration: [N5192T](https://openairdocs.org/aircraft/N5192T), registered now, S/N 602-0527 (OpenAirDocs) - Reported make and model: AIR TRACTOR INC AT-602 - Registry model: [Air Tractor AT-602](https://openairdocs.org/model/air-tractor-at-602) (registry code 0390309) (OpenAirDocs) - Registry engine: [Pratt & Whitney Canada PT6A-66 series](https://openairdocs.org/engine/pratt-whitney-canada-pt6a-66-series) (registry code 52118, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 602-0527 - Airframe hours: 3600 - Engines: P&W CANADA PT6A-66 SER 850 horsepower turbo prop - Damage: Substantial damage - Flight: Aerial application, Part 137 - Operator: R & W Flying Inc - Registered owner: R & W Flying Inc - Airworthiness certificate: Special, Restricted (Special) - Last inspection: 100 hour, June 26, 2009 - Departed: Knobel, AR - Destination: Knobel, AR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 34; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; last flight review April 20, 2009; seat: front; flight hours: 5,200 total, 2,000 in this make and model, 5,000 as pilot in command, 246 in the last 90 days, 146 in the last 30 days, 7 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 340° at 8 knots - Lowest ceiling: none - Temperature: 91 °F - Altimeter: 29.92 inHg ## 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 20090629009809A](https://openairdocs.org/incident/20090629009809A), Jun 29, 2009: Airtrc AT602, Knobel, AR, Substantial damage. On June 29, 2009, at approximately 1859 CDT, N5192T, a AT-602, was operating a FAR 137 agricultural aircraft operation, near Knobel, Arkansas. The commercial… ## Other investigations on N5192T (1) 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. - [NTSB CHI03LA124](https://openairdocs.org/ntsb/CHI03LA124), May 14, 2003: Air Tractor AT-602 (N5192T), Benkelman, NE, substantial damage. Probable cause: The pilot's failure to maintain altitude clearance while maneuvering. Contributing factors were the wheat crop and the ground. ## Docket (1 files) The files NTSB released with the investigation on August 18, 2009, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=74177. 532 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 532 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40315804&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.