Our EFBs allow a specific aircraft registration to be selected which brings up the relevant documents for that aircraft which is useful as we have a wide range of ages and specifications.
The pressure check as you start to taxi confirms that the transfer valve has shifted and braking pressure is being supplied by the GREEN HYD system. Whilst parked the pressure indicated is the YELLOW HYD system, on newer aircraft this is limited to 1000 psi. The accumulator pressure may bleed of over time but is soon recharged when the YELLOW electric pump operates, either manually selected or coming on automatically when the cargo compartment doors are opened.