Wind turbine rotor blade with access window

A wind turbine blade, comprising:

• a profiled contour comprising a pressure side and a suction side, and a leading edge and a trailing edge with a chord having a chord length extending therebetween, the wind turbine blade extending in a spanwise direction between a root end and a tip end;
• an aerodynamic shell having an outer surface forming at least part of an exterior surface of the wind turbine blade, and an inner surface,
• an access window extending through the aerodynamic shell, wherein the aerodynamic shell comprises a recessed portion at the inner surface of the aerodynamic shell adjacent to the access window, and
• a panel arranged within the recessed portion at the inner surface of the aerodynamic shell for closing the access window, wherein the panel comprises a top surface and a bottom surface, wherein at least one first hook member extends from the bottom surface of the panel, wherein at least one second hook member extends from the inner surface of the aerodynamic shell, and wherein at least one elastic strap is fixed between the at least one first and second hook members extending from the bottom surface of the panel and from the inner surface of the aerodynamic shell for fastening the panel to the aerodynamic shell.