1990-04-13: Piper PA-11 — Knik Clacier, AK

Casualties unknown • Knik Clacier, AK, US

Probable cause

A FOREIGN OBJECT (TOOL) HAD JAMMED THE AILERON CONTROLS TO THE RIGHT AS THE PILOT WAS MANEUVERING THE AIRCRAFT FOR A LOW APPROACH TO A STRIP.

— NTSB Determination

Accident narrative

THE PILOT ELECTED TO MAKE A LOW APPROACH OVER A GRAVEL BAR BEFORE LANDING. HE STATED THAT WHILE ROLLING OUT OF A TURN, THE ELEVATOR CONTROL JAMMED TO THE RIGHT. SUBSEQUENTLY, THE AIRPLANE SPIRALED TO THE TERRAIN, THEN CRASHED. AN EXAMINATION REVEALED THAT A SET OF CHANNEL LOCKS HAD SLIPPED UNDER THE FLOOR BOARD AND INTO THE FLIGHT CONTROLS.

Frequently asked questions

What happened in the 1990-04-13 Piper PA-11 accident near Knik Clacier, AK?

THE PILOT ELECTED TO MAKE A LOW APPROACH OVER A GRAVEL BAR BEFORE LANDING. HE STATED THAT WHILE ROLLING OUT OF A TURN, THE ELEVATOR CONTROL JAMMED TO THE RIGHT. SUBSEQUENTLY, THE AIRPLANE SPIRALED TO THE TERRAIN, THEN CRASHED. AN EXAMINATION REVEALED THAT A SET OF CHANNEL LOCKS HAD SLIPPED UNDER THE FLOOR BOARD AND…

What aircraft was involved and where did it happen?

The accident on 1990-04-13 involved a Piper PA-11, registration N4904M, at Knik Clacier, AK.

What was the probable cause of the accident?

A FOREIGN OBJECT (TOOL) HAD JAMMED THE AILERON CONTROLS TO THE RIGHT AS THE PILOT WAS MANEUVERING THE AIRCRAFT FOR A LOW APPROACH TO A STRIP.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X22832. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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