AD Amdt-39-9199
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737 | Airworthiness Directives; Boeing Model 737 Series Airplanes |
Unsafe Condition
Malfunctioning of the rudder power control unit (PCU) could cause the rudder actuator piston and rudder to operate with reduced force capability or move in a direction opposite the intended direction.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Identify the part and serial numbers of the main rudder power control unit (PCU), and replace certain PCUs with serviceable parts if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 737 series airplanes with certain modified rudder PCUs that failed functional retesting.
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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