What component purges fuel from the main fuel manifold on shutdown to prevent coking?

What component purges fuel from the main fuel manifold on shutdown to prevent coking?

• A. Vent Valve
• B. ODV
• C. Fuel Filter
• D. Transfer Valve

Answer: (B)

During shutdown, any fuel left in the main fuel manifold can overheat and coke if it remains there. Purging that fuel removes the hot, trapped liquid and prevents residue from forming in the manifold. The Overboard Drain Valve opens to purge residual fuel from the main fuel manifold, sending it overboard to ensure the manifold is emptied as part of the shutdown sequence. This function is distinct from venting air, filtering fuel, or transferring fuel between tanks, none of which accomplish the purge needed to prevent coking.

During shutdown, any fuel left in the main fuel manifold can overheat and coke if it remains there. Purging that fuel removes the hot, trapped liquid and prevents residue from forming in the manifold. The Overboard Drain Valve opens to purge residual fuel from the main fuel manifold, sending it overboard to ensure the manifold is emptied as part of the shutdown sequence. This function is distinct from venting air, filtering fuel, or transferring fuel between tanks, none of which accomplish the purge needed to prevent coking.