AD 90-14-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737-300 and 737-400 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737-300 and 737-400 Series Airplanes |
Unsafe Condition
Inadvertent rudder trim resulting in unacceptably increasing the level of pilot effort required to maintain the correct heading during takeoff, which may result in a rejected takeoff.
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Required Actions
Replace the rudder trim control knob with a smooth rounded fluted knob approved by the FAA. Add or modify a guard rail to the rear of the cockpit center console to a height of approximately 1.5 inches if the knob is located there. Allow alternate compliance with FAA approval.
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Compliance Time
within the next 12 months after the effective date of this AD, unless previously accomplished
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Affected Aircraft
All Model 737-300 and 737-400 series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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