AD 2020-20-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
deficiencies in the FCM software, including reports that, in certain weather conditions, erroneous low airspeed data may be displayed to the flightcrew before detection and annunciation via engine-indicating and crew alerting system (EICAS) messages, a report indicating that all three FCMs might simultaneously reset if continuously powered on for 22 days, and one report of unannunciated dual symmetric inboard slat skew.
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Required Actions
installing flight control electronics (FCE) common block point 5 (CBP5) software, which terminates the requirements of the ADs superseded by this AD, and accomplish Boeing Alert Service Bulletin B787-81205-SB270039-00, Issue 002, dated March 8, 2018, prior to or concurrently with the software installation specified in paragraph (n)(1) of this AD.
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Compliance Time
Before further flight
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Affected Aircraft
The Boeing Company Model 787-8 and 787-9 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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