Casualties unknown

Porpoising During Touchdown Attempts on Instructional Flight (N9568G)

San Jose, CA, US

On November 21, 1987, a Cessna 172N (registration N9568G) operated by Alps Aviation was involved in an aviation accident near San Jose, CA. 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

During a cross-country instructional flight, a pilot made three landing approaches. The aircraft touched down on the nose wheel multiple times, porpoised, and struck the nose wheel and propeller on the third attempt.

Incident Overview

During a cross-country instructional flight, the pilot attempted three landings. On the first two approaches, the aircraft touched down on the nose wheel and porpoised, prompting the pilot to execute a go-around each time. On the third landing, the aircraft was observed to touch down on the nose wheel without flaring. It then porpoised several times, during which the nose wheel and propeller struck the runway surface.

Pilot Background

The pilot held a private certificate and was enrolled in a training program for a commercial rating at the time of the incident.

Sequence of Events

After completing the cross-country portion of the flight, the pilot initiated the first landing approach. The aircraft touched down on the nose wheel and began porpoising. The pilot responded by initiating a go-around. A second landing attempt yielded the same result: touchdown on the nose wheel, porpoising, and another go-around. On the third approach, the aircraft again touched down on the nose wheel without any flare. The subsequent porpoising was more pronounced, resulting in the nose wheel and propeller striking the runway.

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Frequently asked questions

What happened in the 21 Nov 1987 Cessna 172N accident near San Jose, CA?

During a cross-country instructional flight, a pilot made three landing approaches. The aircraft touched down on the nose wheel multiple times, porpoised, and struck the nose wheel and propeller on the third attempt.

What aircraft was involved and where did it happen?

The accident on 21 Nov 1987 involved a Cessna 172N, registration N9568G, operated by Alps Aviation, at San Jose, CA.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X32565. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.