NTSB CAROL · Event
Event CEN13LA533
Registry · N7843
FAA Aircraft Registry record.
Make / Model
DJI AGRAS T40
ADS-B equipped
Yes — Mode-S AAA223
Registrant of record
SWEETWATER TECHNOLOGIES LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s delay in releasing product to reduce the airplane’s weight and improve its climb performance, which was reduced because of the high density altitude.
Factual narrative
On September 6, 2013, about 1525 central daylight time, a Grumman G-164A, N7843, impacted trees and a bean field 2-1/2 miles west of Atlantic, Iowa. The pilot, the sole occupant on board, sustained minor injuries. The airplane was destroyed by impact forces and a post-impact fire. The airplane was registered to and operated by Shenandoah Flight Service, Inc., Atlantic, Iowa, under the provisions of 14 Code of Federal Regulations Part 137 as an aerial application flight. Visual meteorological conditions prevailed for the flight, and no flight plan had been filed. The flight originated from Atlantic, Iowa, about 1510. The pilot said he had no difficulty taking off into a strong headwind but upon reaching 500 feet and turning north towards the field to be sprayed, the airplane began to slowly lose altitude. Believing he would be unable to clear an approaching tree line, he opened the leveler and the product slowly began to dump. As he pulled up to avoid the trees, the airplane stalled, hit the trees, and impacted a bean field. According to the Federal Aviation Administration (FAA) inspector who went on-scene, the pilot was flying south and spraying the field. He pulled up but did not clear the trees and stalled. The airplane broke several tree limbs and crashed in a field to the south. The inspector said the ambient air temperature was in excess of 90 degrees F. The airplane had several modifications incorporated to increase its gross weight to 6,000 pounds, such as adding 20 inches to each wing tip. The FAA inspector said the latter was an authorized modification. The pilot said that prior to takeoff, the airplane was fueled to capacity (400 gallons, or 2,400 pounds), and the hopper was filled with 1,200 pounds of rye, radish, and turnip seed. He said the airplane weighed 5,134 pounds at takeoff, or 866 pounds below maximum gross takeoff weight. According to NTSB documents, the pilot was involved in another aircraft accident four months earlier. On May 7, 2013, while spraying a field a wheat field near Lyons, Kansas, the airplane, a Cessna A188B, N731JF, lost engine power. The right wing struck the ground and was almost completely severed from the fuselage. The pilot reported that the airplane was fueled to capacity (400 gallons) and that the hopper contained 1,200 pounds of seed. The airplane weighed 5,134 pounds at takeoff, or 866 pounds below maximum gross takeoff weight. The pilot said that he had no difficulty taking off, but after reaching 500 feet and turning north toward the field to be sprayed, the airplane began to slowly lose altitude. Believing he would be unable to clear an approaching tree line, he opened the leveler and the seed slowly began to dump. As he pulled up to avoid the trees, the airplane stalled, hit the trees, and impacted a bean field. As the ambient air temperature was in excess of 90 degrees F, the airplane's performance would have been reduced by the high density altitude. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- C Personnel issues-Action/decision-Action-Delayed action-Pilot - C
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Climb rate-Capability exceeded - C
- — Environmental issues-Conditions/weather/phenomena-Temp/humidity/pressure-High density altitude-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2013_CEN13LA533.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2026 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- arXiv 2023 · arXiv preprint
Automating Bird Diverter Installation through Multi-Aerial Robots and Signal Temporal Logic Specifications
This paper tackles the task assignment and trajectory generation problem for bird diverter installation using a fleet of multi-rotors.
- arXiv 2023 · arXiv preprint
Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2023 · arXiv preprint
Polycrystallinity enhances stress build-up around ice
Damage caused by freezing wet, porous materials is a widespread problem, but is hard to predict or control. Here, we show that polycrystallinity makes a great difference to the stress build-up process…
- arXiv 2022 · arXiv preprint
Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- Embry-Riddle Scholarly Commons 2021 · Journal article (JAAER)
Analysis on the Negative Emotional, Physiological, and Cognitive Responses Elicited from of the Activation of a Stall Alarm
Failing to identify an aerodynamic stall can lead to the inability of an aircraft to sustain flight. To warn pilots of an impending or fully-developed stall, many aircraft have safety devices installe…
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