AD Amdt-39-10244
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 737-100 | Airworthiness Directives; Boeing Model 737-100, -200, -300, -400, and -500 Series Airplanes |
Unsafe Condition
Galling on the input shaft and bearing of the standby rudder power control unit (PCU) could result in uncommanded movement of the rudder or increased pedal forces, leading to reduced controllability of the airplane.
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Required Actions
Conduct repetitive inspections to detect galling on the input shaft and bearing of the standby PCU. Replace the standby rudder actuator with a serviceable actuator if necessary. Eventually replace the input bearing with an improved bearing to terminate inspections.
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Compliance Time
Initial inspection within 18 months or 4,500 hours time-in-service (whichever occurs later). Replacement of the input bearing required within 3 years after the effective date.
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Affected Aircraft
Boeing Model 737-100, -200, -300, -400, and -500 series airplanes with line numbers 1 through 2814 inclusive.
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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