AD 2018-12-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
A latent flow sensor failure combined with single cabin air compressor (CAC) operation resulted in reduced airflow which led to a persistent single CAC surge condition that caused overheat damage to the CAC inlet.
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Required Actions
Installing new pack control unit (PCU) software for the cabin air conditioning and temperature control system (CACTCS) and new CAC outlet pressure sensor J-tube hardware, and doing related investigative and corrective actions if necessary.
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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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