What happened
On November 12, 2024, an ATR 72-500 operated by Nordic Regional Airlines (Norra) arrived at Helsinki-Vantaa Airport. Following the shutdown of the engines at stand 133, the cabin crew opened the rear passenger door to allow nine passengers and four crew members to disembark via a bus transfer.
As the final two passengers were exiting the aircraft, one passenger reached for the right-hand railing on the upper level of the integrated airstair. As the passenger stepped downward, the railing unexpectedly folded into a lowered position. This caused the passenger to lose their balance and fall onto the apron, striking their head. The passenger sustained serious injuries.
The investigation
The investigation focused on the technical operation and operational use of the passenger door's retractable railing. Investigators examined the aircraft's door and exit systems, specifically looking at the locking pin's structure, location, and visibility. The inquiry also reviewed the airline's safety management system, including the procedures for verifying that the railing was securely locked in the upright position before passenger disembarkation. Additionally, the investigation looked into the emergency response coordination between the airline, airport authorities, and emergency services.
Findings
- The primary cause of the accident was the unexpected folding of the railing into the lower position while the passenger was using it.
- The investigation identified that the locking pin's location and visibility were factors in the failure to ensure the railing was properly secured.
- There were discrepancies in emergency notification procedures; the cabin crew and ground personnel did not clearly understand how to initiate an emergency alert for a parked aircraft, leading to a multi-step notification process through various intermediaries.
- The emergency response was delayed as the primary medical unit was tied up with another high-priority task, and the airport's alert system did not reach all necessary units immediately.