Air Conditioning - Software and Hardware - Installation
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must install the new PCU software and CAC outlet pressure sensor J-tube hardware as specified in the referenced Boeing service bulletins. They must also perform any required investigative and corrective actions. The compliance deadline for these actions is July 16, 2018.
Summary
Airworthiness Directive 2018-12-06 is a final rule issued by the Federal Aviation Administration (FAA) addressing certain Boeing Model 787-8 and 787-9 airplanes. It targets an air conditioning system issue involving latent flow sensor failures combined with single cabin air compressor (CAC) operation that can cause CAC inlet overheating and damage. The directive mandates software and hardware updates to the cabin air conditioning and temperature control system to mitigate this unsafe condition.
What changed
This new airworthiness directive requires installing updated pack control unit (PCU) software and new CAC outlet pressure sensor J-tube hardware to prevent persistent single CAC surge conditions. It also mandates related investigative and corrective actions if necessary. The directive incorporates the latest Boeing service bulletins and allows compliance using updated software versions.
Why it matters
This directive is critical for operators and maintenance teams to prevent CAC inlet overheating that can lead to structural damage, cabin and flight deck fumes, and air conditioning interruptions. Compliance ensures continued airworthiness and safety of Boeing 787-8 and 787-9 aircraft by addressing a latent sensor failure and control system deficiency. It helps avoid in-service reliability issues and potential operational disruptions.
More for Boeing 787
All 116- EASA AD US-2026-20-10Flight Controls - Leading Edge Outboard Slat Systems - Airplane Flight Manual - AmendmentOct 19, 2026
- EASA AD US-2026-20-01Fuselage - Cargo Liner Joint Sealing Tape - InspectionOct 16, 2026
- EASA AD US-2026-20-02Master Minimum Equipment List - AmendmentOct 8, 2026
- EASA PAD 26-114Engine – High Pressure Turbine Blades – InspectionSep 24, 2026
- EASA AD US-2026-17-02Wings - Lower Outboard Wing Skin - InspectionsSep 7, 2026
Get the next one by email
New ADs and bulletins for Boeing 787, summarized like this page, every Monday.