Single Engine Taxi
Last summer I flew with US Airways from Philadelphia International Airport. The aircraft was a Boeing 757. Typical of most Cactus flights, we taxied to the active with only Engine No. 2 running.
My questions are:
- What are the procedures for a single-engine taxi?
- Is the APU left on for the entire taxi?
- When is the other engine started up?
- Is there a certain duration which engines must be spooled up for before they are TOGA/FLEX-rated?
- Does keeping the second engine off really save that much fuel considering the running of the APU and the additional thrust required to move the aircraft?
Any input on any equipment from pilots or engineers would be very much appreciated. Thanks a lot guys!
Aaron, Ireland.