RC AT-6 Texan Sound system flight lost signal and crash rc_cam channel

AT-6 Texan w/Flaps, Retracts, Lights and Engine Sound Module System 1300mm
Flight RC AT-6 Texan with sound system
Lost signal and crash!!!
Wingspan: 1300mm
Length: 956mm
Height: 380mm
Flying Weight: 1350g
Motor: 760KV brushless outrunner
ESC: 30A brushless
Servo: 9g x 4, 17g x 2
Battery: 3s 3000mAh
Propeller: 11x10