Casualties unknown

1998-06-20: Aeronca 7AC (N8030P) — Murphy, ID

Murphy, ID, US

On June 20, 1998, an Aeronca 7AC (registration N8030P) was involved in an aviation accident near Murphy, ID. Investigators recorded the probable cause as: The pilot's decision to initiate an aborted landing at an airport where, due to the high density altitude, his aircraft was unable to outclimb the rising terrain that surrounded airport. Factors include a high density altitude and crosswinds. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

A pilot executed a go-around after a crosswind landing but encountered high density altitude, leading to a stall and cartwheel when raising the nose to clear terrain.

Incident Details

After touching down in a 10 to 15 knot crosswind, the pilot observed the aircraft moving 'quickly to the right.' In response, he decided to abandon the landing and execute a go-around. The aircraft successfully lifted off the runway, but the high density altitude prevented it from outclimbing the surrounding terrain. As the pilot raised the nose of the aircraft in an attempt to maintain a climb over the rising terrain, the aircraft stalled, caught a wing, and cartwheeled.

Sequence of Events

The incident began during the landing phase, where a crosswind component of 10 to 15 knots caused the aircraft to drift rightward after touchdown. The pilot's decision to go-around was immediate. However, once airborne, the performance limitations imposed by high density altitude became apparent. The aircraft could not gain sufficient vertical speed to clear the terrain ahead. In an effort to avoid the terrain, the pilot increased the pitch attitude, which led to an aerodynamic stall. The subsequent loss of lift resulted in a wing drop and a cartwheel motion, indicating a severe loss of control.

Contributing Conditions

The primary environmental challenge was high density altitude, which reduces engine power and lift generation. Additionally, the crosswind condition may have complicated the transition from landing to climb. The pilot's action to raise the nose was a natural response to terrain avoidance, but it exceeded the aircraft's performance capabilities given the density altitude.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10433. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.