FAA has issued airworthiness directive 2020-09-16 for ATR42-200, -300s and -320s, requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations, effective June 22, 2020.
FAA has issued airworthiness directive 2020-10-10 for Boeing MD-81s, -82s, -83s, -87s, and -88s, requiring repetitive eddy current high frequency inspections for any cracking in the left and right side center wing lower skin and repair if any crack was found, plus expanding the inspection area to include adjacent stringers with similar stress levels and to perform repetitive inspections with increased sensitivity for crack detection, effective June 26, 2020.