Airworthiness directives › 2021-18-15
AD 2021-18-15 Airworthiness Directives; PZL Swidnik S.A. Helicopters
Models named: PZL W-3A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
This AD was prompted by a report that displaced teeth were detected on the moveable assemblies of an MR blade droop stop. The FAA is issuing this AD to address displaced teeth on the moveable assemblies of the MR blade droop stop. The unsafe condition, if not addressed, could result in erroneous operation of MR blade droop stop teeth during engine start-up or shut-down, or dynamic drop-down of an MR blade, resulting in contact of the affected MR blade with the tail boom, and possibly resulting in injury of occupants or persons on the ground.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1