Redstar Aviation (RHH, Istanbul Sabiha Gökcen) added a first Challenger 604 to its fleet in December 2024, ch-aviation research has shown.

TC-ERB (msn 9603) was first active on December 11, flying between Istanbul Atatürk and Gazipasa. The 19.1-year-old Bombardier Business Aircraft was previously registered in the Cayman Islands as VP-CJS. Its last flight under this registration was on October 31, 2024, between Athens and Istanbul Atatürk.

The Challenger 604 joins Redstar Aviation's fleet comprising four Challenger 605s, two Learjet 45s, and four Learjet 45XR. The company specialises in air ambulance and private jet charter services, with aircraft configured for medical and corporate missions. It also manages several AW139 helicopters for offshore oil and gas operations.