On 11 March 2018, a Bombardier Challenger 604 private jet, owned by Turkish group Başaran Holding, crashed in the Zagros Mountains near Shahr-e Kord, Iran, while returning to Istanbul from Sharjah.

[2] At around 18:01 IRST local time (14:31 UTC), shortly before contact was lost, the crew reported technical problems and requested clearance from air traffic control to descend to a lower altitude.

[4][6] The jet began to climb before abruptly losing altitude, and at 18:09,[7] hit the Zagros Mountains near Shahre Kord, some 370 km (230 mi) south of Tehran, Iran.

[6] Iranian search-and-rescue teams arrived afterwards and found the burned bodies of ten victims.

[11] In March 2020, the AAIB issued its final report, concluding that the accident was caused by insufficient training for airspeed indication failure and poor crew resource management.