IRS alignment on Airbus
Our company SOP's say, for a complete IRS realign we have to switch off the IRS for at least 10 minitutes (this for A330 and A320). As I know that new generation airplanes like the Airbus use laser gyros with no moving parts, this seems a bit long for me. I also could not find any limitation or recommendation neighter in the pilots, nor in the maintance manuals. May be this limitation was on older designs like Boeing?
Does anybody have better information about this?
TKS
Austin