AD 2020-06-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
The stale-data monitoring function of the common core system (CCS) may be lost when continuously powered on for 51 days, leading to undetected or unannunciated loss of common data network (CDN) message age validation, combined with a CDN switch failure.
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Required Actions
Repetitive cycling of the airplane electrical power, as described in Boeing Alert Service Bulletin B787-81205-SB420045-00, Issue 002, dated February 14, 2020.
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Compliance Time
Before further flight
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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 4, 2026
Rights: U.S. Government Public Domain
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