Which QRC item corresponds to Cabin Altitude Emergency Descent?

• A. CABIN ALT-EMER DESCENT
• B. INFLIGHT ENGINE SHUTDOWN
• C. ENGINE INOP APPROACH
• D. ENGINE INOP LANDING

Answer: (A)

When the cabin altitude becomes unsafe, the immediate action is a rapid, controlled descent to restore a breathable cabin environment. The QRC item labeled CABIN ALT-EMER DESCENT is specifically the procedure for this exact scenario, outlining the steps to quickly lower the cabin altitude, such as initiating the descent, using oxygen as needed, and following the assigned altitude/speed targets until pressurization is restored or a safe altitude is reached. The other items describe different emergencies tied to engine issues and therefore do not address depressurization. So this item is the correct match for Cabin Altitude Emergency Descent.