Pilot Debrief

AYRES CORPORATION S2R-T34 near Parkin, AR — 2022-07-23

Final reportCEN22LA335
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Date
2022-07-23
Location
Parkin, AR, USA
Aircraft
AYRES CORPORATION S2R-T34
Registration
N4046S
Category
Airplane
Highest injury
Fatal
Fatalities
1
Phase of flight
Maneuvering

Probable cause

The pilot’s failure to maintain clearance from tower guy wires while maneuvering.

NTSB narrative

The pilot had made multiple aerial application flights before the accident flight. Automatic dependent surveillance - broadcast (ADS-B) data showed that the airplane made multiple passes over the field north of the tower, which was located in the field. During the final pass over the field, the airplane turned north toward the western guy wires. The airplane struck the guy wires and impacted the terrain north of the tower. The operator’s representative stated that the pilot had been briefed about the field’s obstructions, specifically the location of the tower and its guy wires located in the intended field to be sprayed with fungicide. He stated that the pilot had previously flown over the field more than once. The airplane was destroyed by postcrash fire and impact forces, which prevented confirmation of flight control continuity. The propeller displayed S-shaped bending consistent with power generation. No mechanical anomalies that would have precluded normal airplane operation were noted. Toxicology testing revealed that the pilot had used cannabis. The psychoactive compounds delta-9-THC and delta-8-THC were detected in his heart blood at low concentrations. THC can decrease vigilance and has effects for several hours. However, because of the fat storage and slow release of THC, low concentrations in blood can reflect use several days ago. How recent or frequent the pilot’s use of cannabis was unknown, as was the type of product. Given these unknowns, while the pilot was found to have cannabis in his system, it could not be determined if the concentration would have been impairing and influenced his vigilance about avoiding the antenna hazard.

Analysis

Primary failure mode
Loss of control
First missed decision gate
Pilot could have avoided the guy wires during the final pass over the field.

NTSB coding

Evidence available

  • ADS-B / radar
  • Photos
  • 13 docket documents
View NTSB final reportView NTSB docket

Docket documents13

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