Airbus advances A350F certification with intensive cargo system testing in Bremen

Airbus is intensifying ground testing of the future Airbus A350F as the programme moves closer to first flight later this year, with engineers in Bremen focusing on the aircraft’s advanced cargo handling and main-deck door systems.

Unlike a passenger aircraft conversion, the A350F has been designed from the outset as a dedicated next-generation freighter capable of carrying up to 111 tonnes of cargo. A major part of the certification effort is centred on ensuring the reliability and safety of the aircraft’s Main-Deck Cargo Door (MDCD) and Cargo Loading System (CLS).

At Airbus’ Bremen test centre, engineers are using two large-scale physical demonstrators known as the “Cargo Door Actuation System System Integration Bench” (CDAS SIB) and “Cargo Zero” to validate the systems before the aircraft enters flight testing.

The CDAS SIB focuses on the operation of the A350F’s massive cargo door, which features a 170-inch-wide opening — one of the largest in the industry. Unlike traditional freighters that rely on hydraulic systems, the A350F uses an all-electric cargo door mechanism powered by geared rotary actuators capable of opening or closing the door within 60 seconds, even in winds of up to 40 knots.

Airbus has also introduced a newly patented door latching system designed to reduce weight, save space and lower maintenance complexity by using fewer components than existing freighter door mechanisms.

The test bench itself weighs nearly 20 tonnes and repeatedly cycles the cargo door under simulated operational loads to validate the electrical actuators, motors, sensors and control software required for certification.

A second full-scale demonstrator, known as Cargo Zero, replicates a large section of the A350F cargo hold and is being used to test real-world loading operations. The 24-metre-long rig includes functioning roller tracks, power-drive units, control panels and cargo handling systems identical to those planned for the production aircraft.

Engineers are testing the system using a variety of unit load devices and heavy cargo scenarios, including oversized turbofan engine transport simulations requested by future operators. The facility also evaluates cargo handling under different aircraft attitudes, such as nose-up or nose-down positions, to replicate operational conditions.

According to Airbus testing teams, Cargo Zero is also being used for safety-related exercises, including emergency evacuation and medical rescue scenarios within the cargo compartment.

Additional testing includes validation of the aircraft’s Tail Tipping Warning System, designed to prevent the freighter from tipping backwards during uneven or improper loading situations, particularly under adverse weather conditions.

The data generated from both test rigs will support certification work with the European Union Aviation Safety Agency ahead of the A350F’s planned entry into service later in the decade.