Casualties unknown

1986-07-27: Navion A (N111T) — Grass Valley, CA

Grass Valley, CA, US

On July 27, 1986, a Navion A (registration N111T) was involved in an aviation accident near Grass Valley, CA. 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 Navion A landed hard on runway 01 after an attempted go-around. The pilot, encountering a gusting tailwind, initiated a go-around and retracted flaps halfway at 50 ft AGL, causing the aircraft to settle onto the runway.

Accident Description

A Navion A sustained a hard landing on runway 01 following an attempted go-around. The pilot reported that he was landing to the north with full flaps when he discovered a gusting tailwind. He initiated a go-around, and at 50 feet above ground level (AGL), he brought the flaps up halfway. The aircraft then settled and landed hard on the runway.

Pilot Report

According to the pilot, the landing approach was made to the north with full flaps deployed. During the approach, he detected a gusting tailwind condition and decided to perform a go-around. During the go-around, at an altitude of 50 feet AGL, the pilot retracted the flaps to the halfway position.

Environmental Conditions

Wind observations from a reporting station 24 nautical miles west of the airport indicated winds from 150 degrees at 10 knots. No further weather details were provided.

Aircraft Information

The aircraft involved was a Navion A. Specific registration, engine details, and other identifying information were not disclosed in the report.

Regulatory Guidance

The flight training handbook, Advisory Circular 61-21A, cautions pilots about premature retraction of flaps during a go-around. It states: 'Caution must be used in retracting the flaps. Depending on the airplane's altitude and air speed, it may be wise to retract the flaps intermittently in small increments to allow time for the airplane to accelerate progressively as they are being raised. A sudden and complete retraction of the flaps at a very low airspeed could cause a loss of lift resulting in the airplane settling into the ground.'

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34232. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.