Following the October 2018 crash of Lion Air flight 610, Sumadi suspended Lion Air's technical director. In accordance to a presidential order, Sumadi also conducted a review of airfares, particularly for low-cost carriers. He also promised to impose sanctions on the airline following the completion of the investigation. Sumadi had previously issued a warning to Lion Air's management to revamp its safety and scheduling in 2017 following several non-fatal incidents.
