Boeing is introducing new technology into the cockpit of its narrowbody aircraft – a touchscreen display designed for the flight management interface. The Touchscreen Control Display Unit (TCDU) has recently become available as a retrofit option for the Boeing 737 MAX and 737NG, while the new 737 MAX-10 will feature it as standard equipment.
The TCDU retains the familiar layout of the physical keyboard found on the current Control and Display Unit (CDU), but brings a modernized interface through a glass touchscreen. In addition, it is equipped with two connectors that enable integration of additional systems and future upgrades.
The new unit is fully compatible with both Boeing’s Flight Management System (BFMS) and existing legacy systems produced by GE. This ensures flexibility in use and an easier transition from current solutions to the next generation of systems.
According to Boeing, the installation of the TCDU brings several key benefits. The glass display reduces maintenance costs and, thanks to its lower weight compared to conventional units, reduces the aircraft’s mass by 1.4 kilograms. While seemingly minor, this detail can be significant in the long run as it contributes to fuel efficiency optimization.
Still, some skepticism has already emerged among pilots. The greatest concern stems from its practical use during turbulence, when it is difficult to precisely select the desired input on a touchscreen. In such conditions, physical keys still have the advantage, offering tactile feedback and faster response.
A similar approach to digitalization has been introduced by Gulfstream, which shifted certain overhead panel modules to touch displays in some models. In general aviation, Garmin avionics has long been at the forefront of touchscreen integration, though pilot experience continues to highlight a clear line between the convenience of touch interfaces and the necessity of physical controls in critical phases of flight.
The introduction of touchscreens into the 737 cockpit thus marks another step in the digitalization and modernization of flight management systems, but also raises the debate on where the optimal balance lies between innovation and ergonomics. The TCDU is expected to gradually become standard on more aircraft, with the MAX-10 being the first to use it in its production configuration from the outset.
