Airworthiness Directive · Amendment 39-21716 · Main rotor system
PZL Swidnik S.A. Helicopters
This AD applies to PZL Swidnik S.A. Model PZL W-3A helicopters, certificated in any category, with movable assemblies of main rotor (MR) blade droop stop, part number (P/N) 37.21.800.00.00, installed.
The FAA is adopting a new airworthiness directive (AD) for certain PZL Swidnik S.A. Model PZL W-3A helicopters. This AD was prompted by a report that displaced teeth were detected on the moveable assemblies of a main rotor (MR) blade droop stop. This AD requires removing from service the moveable assemblies from each affected MR blade droop stop and prohibits installation of an affected MR blade droop stop and moveable assemblies of affected MR blade droop stops. The FAA is issuing this AD to address the unsafe condition on these products.
Within 30 days after the effective date of this AD, remove from service each moveable assembly of MR blade droop stop P/N 37.21.800.00.00 from all MR hub arms, in accordance with Chapter II of WYTWÓRNIA SPRZĘTU KOMUNIKACYJNEGO “PZL-Świdnik” Spółka Akcyjna Mandatory Bulletin No. BO-37-18-302, Revision 1, dated July 11, 2019.
As of the effective date of this AD, no person may install on any helicopter an MR blade droop stop, P/N 37.21.800.00.00, and do not install on any helicopter any movable assembly of an MR blade droop stop, P/N 37.21.800.00.00.
