Indonesian budget carrier, Lion Air, has been cautioned by the State Ministry of Transport (MOT) due to a number of operational concerns and mistakes. The MOT has given the airline two months to improve its operational conduct or be faced with sanctions and fines. The airline has reportedly committed a number of operational errors and breaches of conduct, including aircraft departing without all passengers, regularly delayed flight services, incorrect passenger manifests and an instance of a Boeing 737 aircraft leaking fuel onto the tarmac whilst parked in gate.

Güneş Ekspress Havacılık A.Ş, Operating as SunExpress, is a regional operator based out of Antalya Airport, Turkey. The airline was launched in 1989 as a joint venture between state carriers Lufthansa and Turkish Airlines, each of whom retain a 50% stake. Operations commenced the following year, in the form of a charter flight between Antalya and Frankfurt. Shortly after, scheduled flights were launched with a small fleet of Boeing aircraft.

Since its inception, SunExpress has undertaken significant growth of its fleet and route network and now offers services to many Turkish and regional destinations. During March 2010, SunExpress took over the first of several AnadoluJet aircraft and commenced operating on behalf of AnadoluJet. It is important to note that AnadoluJet does not have its own individual Air Operating Certificate (AOC). The airline's operations are almost exclusively undertaken by SunExpress under the operating license of SunExpress. In 2011, SunExpress, launched its sister subsidiary airline, SunExpress Germany (Deutschland GmbH). This airline operates under its own Air Operator’s Certificate and is classed as a separate entity.

In early 2017, SunExpress operated a young fleet of Boeing 737 series aircraft with an average age just over five years. Furthermore, the airline has placed orders for an additional 37 aircraft, indicating it likely has access to sufficient financial resources.

On the 17th March 2017, a REX Regional Express Saab 340B (REG. VH-NRX) was performing a scheduled flight from Albury Airport to Sydney Airport. As the aircraft was descending towards its destination, the right hand propeller separated from the engine mounting. The flight crew we able to maintain control of the aircraft and performed a safe landing approximately 25 minutes later. Following the incident, REX has announced the grounding of five additional Saab 340B aircraft of the same production series, to allow for an inspection of the engine mounting and propeller gear boxes.