AD 2020-07-22
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | PZL | Swidnik S.A. | Airworthiness Directives; PZL Swidnik S.A. Helicopters |
Unsafe Condition
occurrences of improperly locked bolts, which secure the input quill cover and graphite seal assembly of the WR-3 MGB, could lead to disconnection of the engines to the MGB mechanical link, possibly resulting in loss of helicopter control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
inspect each bolt P/N 89.00.0049 for proper locking using a fiberscope, remove the engine and inspect each bolt head for signs of rubbing and deformation, inspect each bolt for proper torque, remove the left-hand and right-hand input drive quill seals, and inspect each graphite seal assembly; replace the graphite seal assembly or remove it from service if necessary; prohibit installing affected MGBs that have not been inspected for improperly locked bolts.
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Compliance Time
Within 25 hours time-in-service
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Affected Aircraft
PZL Model PZL W-3A helicopters with a WR-3 MGB serial number up to and including 316463007M installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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