Incident Overview
On 3 August 2017, a collision occurred at Kualanamu International Airport, Medan, Indonesia, involving a Boeing 737-900ER operated by PT. Lion Mentari Airlines (Lion Air) with registration PK-LJZ, and an ATR 72-500 operated by PT. Wings Abadi Airlines (Wings Air) with registration PK-WFF. The accident was investigated by the Komite Nasional Keselamatan Transportasi (KNKT), which released a final report in April 2018.
Damage
The Boeing 737 sustained damage to its left wing, including a damaged slat. The ATR 72 sustained damage to its right wing, with part of the wing striking the pitot tube. Debris from the collision was found on the runway.
Investigation
The KNKT investigation examined the movement of both aircraft, air traffic controller attention, the use of conditional clearances, and hazard identification on the runway. The report's analysis sections address these topics. The report also identified contributing factors and issued safety recommendations.
Safety Actions
Following the accident, AirNav Indonesia Branch Office Medan issued a circular (number CBKO.EDT.001/04/LPPNPI/08/2017). Wings Air published a Notice to Pilot (number 42/NTP/OMIW/VIII/2017) and a Safety Bulletin. Lion Air issued a Recommendation to Pilot. These actions are documented in the KNKT report.