If the captain of this LATAM flight didn't report that all systems went down for a short while, I'd bet some money on a malfunctioning ADIRU [0]. The Wikipedia

If the captain of this LATAM flight didn't report that all systems went down for a short while, I'd bet some money on a malfunctioning ADIRU [0]. The Wikipedia page even includes a nice list of incidents caused by it, mostly with similar results. [0] https://en.wikipedia.org/wiki/Air_data_inertial_reference_unit https://en.wikipedia.org/wiki/Air_data_inertial_reference_un...