On July 1, 2016, a BOEING, 787-800 was involved in an aviation accident near Warszawa (EPWA), PL. Investigators recorded the probable cause as: The cause of the incident was the switching of the overspeed warning switch to the "GEAR DOWN" position. This summary draws on records from the Polish State Commission on Aircraft Accidents Investigation (PKBWL).
On 1 July 2016, a Boeing 787-800 crew reported technical problems and returned to Warsaw Chopin Airport after a speed limit indicator failure. The cause was an accidental switch setting.
Incident Overview
On 1 July 2016, the crew of a Boeing 787-800 aircraft reported technical problems and decided to return to the departure airport, Warsaw Chopin Airport (EPWA), due to a failure of the speed limit indicator with the landing gear extended. After jettisoning fuel, the aircraft performed a landing maneuver and landed safely at the departure airport.
Cause
The cause of the incident was the switching of the overspeed warning switch to the "GEAR DOWN" position. After switching the switch back to the "NORM" position, the above phenomenon ceased.
Preventive Actions
The incident was recorded in the SMS database of PLL LOT SA.
Safety Recommendations
No safety recommendations were formulated.
Commission Comments
None.
Probable cause
The cause of the incident was the switching of the overspeed warning switch to the "GEAR DOWN" position.
