AD 2023-21-05
Unsafe Condition
Due to software issues, certain FMC2 NAVM navigation modules provide erroneous data to the flight management computer, compromising safe flight of the airplane.
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Required Actions
Within 30 days after the effective date, revise the Limitations Section of the existing airplane flight manual (AFM) by adding specified information from Tables 1 and 2. Update the navigation database software.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
Thales AVS France SAS flight management computer navigation modules (FMC2 NAVM), part number (P/N) C13084CA03, installed on airplanes certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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