AD 2024-23-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Failure of the spoiler deflection to engage the cruise thrust split monitor (MONFD) used by the autothrottle (A/T) system, which could lead to significant throttle split, leading to asymmetric thrust and the subsequent lack of autothrottle disengagement, uncommanded roll, and consequent loss of control of the airplane, and reduced ability of the flightcrew to maintain the safe flight and landing of the airplane.
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Required Actions
Changing certain wire bundles, installing a new housing assembly, removing the mechanical aileron force limiter (MAFL), doing an inspection or records check to determine if certain flight control computers (FCCs) are installed, and performing applicable on-condition actions.
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Compliance Time
Within 50 flight hours
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Affected Aircraft
The Boeing Company Model 737-300 and -400 series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 737-22A1399 RB, dated April 13, 2023.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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