AD 2021-08-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
A flap synchro wire failure that may go undetected by the autothrottle (A/T) computer, leading to a potential loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform repetitive BITE tests of the A/T computer to detect a flap synchro wire failure, and take corrective action if necessary.
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Compliance Time
Within 250 flight hours or 2 months after the effective date of this AD, whichever occurs first.
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Affected Aircraft
The Boeing Company Model 737-300, -400, and -500 series airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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