Casualties unknown

Touch-and-go landing interrupted by nose gear retraction (N9557B)

Seattle, WA, US

On February 10, 1984, a Cessna 172 RGII (registration N9557B) operated by Boeing Employees Flying Ass. was involved in an aviation accident near Seattle, WA. Investigators recorded the probable cause as: The unexpected retraction of the nose gear during takeoff, which occurred despite the presence of squat switches designed to prevent such an event, with no mechanical malfunction found in the retraction system. 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 2026-06-23Data APIEditorial standards

During a touch-and-go maneuver, the aircraft's nose gear unexpectedly retracted at rotation. Power was reduced and the plane slid to a stop. Investigation found no mechanical fault.

What happened

The incident occurred during a routine flight operation involving a touch-and-go landing sequence. As the pilot initiated the takeoff roll following the touchdown, the aircraft's nose gear unexpectedly retracted into the fuselage. This mechanical action coincided with the moment of rotation, the point at which the aircraft lifts its nose off the runway.

Upon realizing the gear was no longer supporting the front of the aircraft, the pilot immediately reduced engine power to idle. Without the structural support of the nose landing gear, the aircraft could not maintain normal flight dynamics or continue the takeoff. The plane slid along the runway surface until it came to a complete stop. There were no reports of injuries to the occupants during this event.

The investigation

Following the incident, investigators conducted a thorough examination of the aircraft's landing gear system to determine why the nose gear had retracted while the aircraft was still on the ground. Modern aircraft are typically equipped with squat switches, which are sensors designed to prevent gear retraction when the weight of the aircraft compresses the landing gear struts. These switches signal the system that the plane is grounded.

Testing of the retraction system revealed no malfunction. The electrical and mechanical components responsible for locking the gear in the down position appeared to function correctly according to design specifications. The investigation could not identify a specific mechanical failure within the gear mechanism itself.

Probable cause

The unexpected retraction of the nose gear during takeoff, which occurred despite the presence of squat switches designed to prevent such an event, with no mechanical malfunction found in the retraction system.

Frequently asked questions

What happened in the 10 Feb 1984 Cessna 172 RGII accident near Seattle, WA?

During a touch-and-go maneuver, the aircraft's nose gear unexpectedly retracted at rotation. Power was reduced and the plane slid to a stop. Investigation found no mechanical fault.

What aircraft was involved and where did it happen?

The accident on 10 Feb 1984 involved a Cessna 172 RGII, registration N9557B, operated by Boeing Employees Flying Ass., at Seattle, WA.

What was the probable cause of the accident?

The unexpected retraction of the nose gear during takeoff, which occurred despite the presence of squat switches designed to prevent such an event, with no mechanical malfunction found in the retraction system.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X38917. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.