Casualties unknown

Aircraft Encounters Turbulent Boundary Layer on Takeoff and Strikes Telephone Pole (N733AA)

Schurz, NV, US

On June 30, 1994, a Cessna 172N (registration N733AA) operated by Nevada Cal Aero was involved in an aviation accident near Schurz, NV. Investigators recorded the probable cause as: the pilot's inability to maintain an adequate airspeed in the takeoff initial climb due to an encounter with a windshear. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

A witness and pilot reported a normal takeoff until 100 ft AGL, when the aircraft encountered a turbulent boundary layer, airspeed dropped from 80 to 30 knots, and the stall horn activated. The aircraft descended and struck a telephone pole and wire at the airport boundary.

Incident Overview

A witness and the pilot involved in the incident provided separate accounts of a takeoff that initially appeared normal. According to their statements, the aircraft climbed to about 100 feet above ground level (AGL) before encountering a very turbulent boundary layer. At that moment, the airspeed indicator instantaneously dropped from 80 knots to 30 knots, and the stall horn began sounding continuously. Both individuals reported that they were unable to recover the airspeed, and the aircraft subsequently descended. The descent ended when the aircraft impacted a telephone pole and wire located at the north boundary of the airport.

Pre-Takeoff Conditions

The witness noted that no windsock was observed at the airstrip. To gauge wind conditions before takeoff, the pilots looked at the trees surrounding the airport. The witness estimated the winds were from 310 degrees at 10 knots, with gusts exceeding 20 knots.

Pilot and Witness Background

The passenger seated in the right front seat holds an airline transport pilot certificate and is employed as an airline pilot. The pilot flying the aircraft also provided an interview. Both individuals stated in separate interviews that the takeoff was normal until the aircraft reached approximately 100 feet AGL.

Sequence of Events

After reaching 100 feet AGL, the aircraft entered a turbulent boundary layer. The airspeed indicator rapidly fell from 80 to 30 knots, and the stall horn activated and remained on. Despite efforts to regain airspeed, neither pilot could prevent the descent. The aircraft continued downward until it struck a telephone pole and associated wire at the northern perimeter of the airport.

Aftermath

The source does not provide further details on the condition of the aircraft, occupants, or any injuries. No additional information about the location, date, or aircraft type is included in the original report.

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Frequently asked questions

What happened in the 30 Jun 1994 Cessna 172N accident near Schurz, NV?

A witness and pilot reported a normal takeoff until 100 ft AGL, when the aircraft encountered a turbulent boundary layer, airspeed dropped from 80 to 30 knots, and the stall horn activated. The aircraft descended and struck a telephone pole and wire at the airport boundary.

What aircraft was involved and where did it happen?

The accident on 30 Jun 1994 involved a Cessna 172N, registration N733AA, operated by Nevada Cal Aero, at Schurz, NV.

What was the probable cause of the accident?

the pilot's inability to maintain an adequate airspeed in the takeoff initial climb due to an encounter with a windshear.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001206X01584. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.