AD 2023-19-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The autopilot flight director system (AFDS) failed to transition to the instrument landing system localizer (LOC) beam after the consistent localizer capture function in the FCMs initiated a transition to capture LOC during approach, and misleading vertical flight director guidance can be presented to the flightcrew under certain conditions.
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Required Actions
Revising the existing airplane flight manual (AFM) to incorporate procedures for an approach with a localizer-based navigation aid, monitoring localizer raw data, calling out any significant deviations, and performing an immediate go around under certain conditions. Installing applicable software updates to the flight control module (FCM).
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Compliance Time
Within 50 flight hours
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Affected Aircraft
The Boeing Company Model 787-8, 787-9, and 787-10 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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