Incident Overview
On 27 May 2021 at 13:23 local time, a Boeing 737-7K5, registration OO-JAO, operated by TUI AIRLINES BELGIUM N.V. (''TUI fly''), was involved in a serious incident during cruise flight over the territory of the Republic of Serbia.
Sequence of Events
While cruising at flight level FL400, approximately 50 minutes after departure from Santorini, the crew received a low oil quantity indication for engine #1, with oil pressure and temperature within normal limits. About 20 minutes later, oil pressure on engine #1 began to decrease. The crew analyzed the situation and decided to divert to Belgrade Nikola Tesla Airport. After initiating descent, oil pressure dropped below normal limits. The crew performed the appropriate checklists, shut down engine #1, and declared an emergency. Air traffic control gave priority for landing on runway 12 and alerted emergency services. The aircraft landed safely on one engine without further incident.
Damage and Injuries
Post-flight inspection of the aircraft and engines revealed damage to the starter of engine #1. This starter damage had caused the loss of oil from engine #1. No other damage to the aircraft was found. No injuries were reported among any persons on board; there were no fatalities.