What happened
On March 16, 2017, at approximately 19:20 UTC, an incident occurred at Warsaw Chopin Airport (EPWA) involving a Boeing 737-800 operated by Enter Air Sp. z o.o. While the aircraft was parked at stand 93 undergoing ground handling services, the edge of the rear cargo hold sill sustained damage. The damage was caused by physical contact between the aircraft's sill and the railings of a conveyor belt loader.
The investigation
The investigation, conducted by a commission appointed by LS Airport Services S.A., examined the technical condition of the equipment and the personnel involved. The inquiry established that the conveyor belt was technically sound and had undergone all required inspections. Furthermore, the operator of the equipment was found to be properly trained in the use of ground support equipment (GSE), held valid permits to operate on the airport apron, and was not under the influence of alcohol at the time of the event.
Following the incident, a technical assessment of the aircraft was performed. The damage was determined to be within the limits specified by the manufacturer, and the aircraft was cleared to return to service.
Findings
The investigation concluded that the primary cause of the contact was operator error, specifically occurring when the operator's foot slipped from the brake pedal. This slip led to a momentary loss of control over the movement of the conveyor belt, resulting in the impact with the aircraft.
Safety action
Following the event, the handling operator implemented several preventive measures. All branches of the handling company were notified of the incident. Additionally, department directors were instructed to discuss the event during daily briefings to remind personnel of the procedures for the safe operation of ground support equipment during aircraft servicing.