AD 2008-22-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters, Inc. Model 500N and 600N Helicopters |
Unsafe Condition
Failed adapter tubes may lead to loss of yaw control and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Turn OFF the Yaw Stability Augmentation System (YSAS) switch. Install a placard limiting airspeed to 100 KIAS or V<INF>NE</INF>, whichever is less. Revise the limitations section of the Rotorcraft Flight Manual (RFM) to reflect the airspeed limitation. Replace adapter tubes without a production date code stamp with airworthy adapter tubes that have a production date code stamp.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight and within 45 days.
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Affected Aircraft
MD Helicopters, Inc. Model 500N and 600N helicopters with affected adapter tubes 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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