The EMER DEPRESS switch light allows the outflow valve to open and the cabin will rise to ___. It should NOT be selected at altitudes above ___.

• A. 14,500 ft / 15,000 ft
• B. 12,000 ft / 9,000 ft
• C. 16,000 ft / 15,500 ft
• D. 10,000 ft / 12,000 ft

Answer: (A)

EMER DEPRESS opens the outflow valve fully, causing rapid depressurization. With the valve open, the cabin pressure drops and the cabin altitude climbs toward ambient; for this airplane, that rise is about 14,500 ft. The switch is restricted to operations below about 15,000 ft because deploying emergency depressurization at higher altitudes isn’t intended and can create conditions that are unsafe or require a swift, controlled descent rather than a rapid, uncontrolled venting.