When using the emergency hydraulic system to extend the flaps, the pilot must ________________.

• A. Lower the flaps before pulling the emergency landing gear handle and extending the gear
• B. Ensure the landing gear are down and use the emergency flap extension handle
• C. Pull the emergency landing gear handle to extend the landing gear before extending the flaps
• D. Ensure the speed brake is extended before moving the flap lever

Answer: (C)

In an electrical or normal hydraulic failure, the emergency hydraulic system powers both the landing gear and the flaps. The first step is to pull the emergency landing gear handle to extend the landing gear, because this action pressurizes and routes hydraulic fluid through the emergency circuit. Only after the gear is down does the system have the proper pressure to extend the flaps reliably. Extending the flaps before the gear is down may not work or could risk improper flap operation. After the gear is extended, you can then extend the flaps as needed with the emergency system. The status of the speed brake isn’t part of this emergency sequence.