The Bundeswehr, the German military, announced it would not accept deliveries of two A400M Atlas transport aircraft due to recurring technical problems.

While defining the aircraft as the “backbone” of its air transport capabilities, the Bundeswehr is concerned about recurring technical problems affecting its fleet. “During routine inspections of the mounting nuts on the propellers of the A400M already in flight, it was found that not all 24 nuts per propeller have the intended tightening torque,” revealed the Luftwaffe, the German air force, in a statement.

Increased inspections of the engine mounts, combustion chambers, and engine flap, as well as crack testing on several points, are also required and reduce the readiness of the A400M fleet.

In addition to technical deficiencies, the two latest aircraft that were about to be delivered did not meet the “contractually guaranteed properties”, leading to the refusal.

So far, the Bundeswehr has received 31 of the 53 A400M it ordered. In total, 174 A400M airlifters were ordered, with 84 already in service. Outside of the partner countries of the program, namely Belgium, France, Germany, Luxembourg, Spain, and Turkey that total 170 orders, the remaining four were acquired by Malaysia.

AeroTime has reached out to Airbus for comment but did not receive an answer at the time this article was published.

The A400M is a military transport aircraft designed by Airbus Defence and Space. It entered service in 2013, and is offered as a successor for older transporters such as the C-130 Hercules or the C-160 Transall. It recently achieved the certification flight test for the highly awaited simultaneous dispatch of paratroopers from both side doors. The feature had been delayed by the design shortcomings of static lines.

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The Airbus A400M Atlas transport aircraft has completed the certification flight test for the simultaneous dispatch of 80 equipped paratroopers from both side doors on a single pass.