Airbus has developed a modification for A380s that addresses an internal timer issue which required operators periodically to recycle the type’s power systems.
The European Union Aviation Safety Agency had instructed operators to recycle the system because certain avionics systems could be affected after 149h of continuous power-up.
“Depending on the affected [aircraft] systems or equipment, different consequences have been observed and reported by operators,” says EASA.
The situation could result in partial or total loss of multiple core processing module capability to emit avionics communications data.
But EASA has revised its directive after Airbus developed two modifications for A380s and issued a service bulletin for updating core processing module software. This amounts to an “optional terminating action” for the repetitive power cycling, it adds.
Source: Cirium Dashboard