Which Emergency Procedure is activated when there is loss of transmit and/or receive capability from one crew station and loss of normal digital ICS functions from that station?

• A. Hydraulic Indicating System Failure
• B. LPCAP Failure
• C. ICU Failure
• D. SFI Failure

Answer: (B)

The situation described points to a problem with the local processing and communications at that crew station—the LPCAP. This subsystem handles the station’s intercom and digital ICS functions as well as control of the radios. When the LPCAP fails, you can lose both transmit/receive capability and the normal digital ICS features from that seat. The appropriate response is to execute the LPCAP Failure procedures, which are designed to keep the rest of the crew communicating by routing through the remaining stations and alternate ICS paths, while you diagnose or isolate the faulty LPCAP unit. The other options involve different systems (hydraulic indicators, a separate control unit, or another subsystem) and wouldn’t cohesively explain the exact combo of radio TX/RX loss and digital ICS loss at a single station.