EASA 2020-0194

Requires a one-time inspection for missing washers and loose nuts on engine attachment hardware and, depending on findings, accomplishment of applicable corrective action(s). Prompted by engine attachment hardware of a PC-24 that during a scheduled maintenance inspection was found not to conform to the approved design. That included a washer missing beneath each of the four mating bolt heads on the rear engine beam and loose nuts on some of the keeper fitting attachment bolts on the left- and right-hand middle inner nacelle.