Is the nose cone area pressurized, and what does it contain?

• A. Unpressurized; contains two oxygen bottles, standby instrument battery assembly, and avionics
• B. Pressurized; contains two oxygen bottles and avionics only
• C. Unpressurized; empty
• D. Pressurized; contains air conditioning packs

Answer: (A)

The nose cone area is unpressurized. In that forward compartment you’ll find the two oxygen bottles used to provide crew oxygen in an emergency, the standby instrument battery assembly that powers essential standby instruments if the main electrical system fails, and avionics equipment that sits in the forward bay for accessibility and maintenance. Keeping these items in an unpressurized, forward location simplifies design and maintenance, and supports quick access to life-support and backup systems without needing to manage pressurization in that space.