AD 90-10-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 737-300 Series | Airworthiness Directives; BOEING Model 737-300, -400, and -500 Series Airplanes |
| aircraft | The Boeing Company | 737-400 Series | Airworthiness Directives; BOEING Model 737-300, -400, and -500 Series Airplanes |
| aircraft | The Boeing Company | 737-500 Series | Airworthiness Directives; BOEING Model 737-300, -400, and -500 Series Airplanes |
Unsafe Condition
Separation of the control wheel from the control column due to missing cotter pins, damaged threads on attach bolts, or improper installation of the nut.
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Required Actions
Within 72 hours after the effective date, perform a visual inspection of control wheels for missing cotter pins and damaged threads. If cotter pin is missing, check nut installation and install a new cotter pin before further flight. If bolt threads are damaged, replace nut, bolt, and cotter pin before further flight. Submit a report within 48 hours of inspection to the Seattle Aircraft Certification Office.
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Compliance Time
Within 72 hours (clock hours, not flight hours) after the effective date of this AD
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Affected Aircraft
BOEING Model 737-300, -400, and -500 series airplanes, line number 1488 through line number 1866
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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