AD Amdt-39-11564
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD | Various | Airworthiness Directives; MD Helicopters Inc. Model 500N and 600N Helicopters |
Unsafe Condition
Stress corrosion cracks in the thruster control cable conduit cap may lead to failure of the cap, causing a fixed thruster condition and subsequent loss of normal anti-torque directional control.
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Required Actions
Inspect the thruster control cable conduit cap for corrosion or cracks within 5 hours TIS or before further flight after December 31, 1999. Inspect the cap at specified areas of the forward and center thruster cables for corrosion or cracks within 100 hours TIS or before further flight after February 19, 2000. Replace the unairworthy thruster cable with an airworthy one if an unacceptable crack is found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 5 hours TIS or before further flight after December 31, 1999, for the initial inspection; within 100 hours TIS or before further flight after February 19, 2000, for the subsequent inspection.
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Affected Aircraft
MD Helicopters Inc. Model 500N and 600N helicopters.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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