Superseded. This AD was superseded by AD 2022-21-13. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2021-23-17
Effective 01/10/2022 · Published 12/06/2021
Airworthiness Directives; Hoffmann GmbH & Co. KG Propellers
Summary
The FAA is superseding Airworthiness Directive (AD) 2020-25-05 for all Hoffmann GmbH & Co. KG (Hoffmann) model HO-V 72 propellers. AD 2020-25-05 required amending the existing aircraft flight manual (AFM) with abnormal propeller vibration instructions. AD 2020-25-05 also required visual inspection and non-destructive test (NDT) inspection of the propeller hub and, depending on the results of the inspections, replace…