FCOM: 70 - Engines

Question 1

You’re on a NEO and hear a hissing/buzzing noise coming from the engine after shutdown. Explain.

Answer 1

This is the Reverse Bleed System (RBS). It blows ambient air through the nozzle to prevent coke forming in the fuel nozzles.

See TECH 6/24

11/06/24

Question 2

You attempt engine start, but it fails. What is a consideration before attempting a second start?