RAT MAN ON pb A320
Hello pilots A320!
Who can explain about RAT (RAM AIR TURBINE).
I’ve question. What is difference for use between RAT MAN ON pb (HYDRAULIC SYSTEM) and RAT MAN ON pb (EMER ELEC PWR)
FCOM says:
HYD
RAT MAN ON pb. The flight crew may extend the RAT at any time by pressing the RAT MAN ON pushbutton.
Note:The RAT extends automatically if AC BUS 1 and AC BUS 2 are lost. (Refer to Overhead Panel (Cont'd))
EMER ELEC PWR
RAT MAN ON pb (guarded)
AUTO:
When the following conditions are met:
AC BUS 1 is not electrically supplied, and
AC BUS 2 is not electrically supplied, and
Aircraft speed is greater than 100 kt.
• The RAT extends, and
• The blue hydraulic system drives the emergency generator.
As soon as the emergency generator electrical parameters are within tolerance the emergency generator is connected to the aircraft network.