Hi,
Spannersatcx & Dan Winterland, thank you for your answers.
-What are the emergency and abnormal conditions that require to place the EDP switch to the DEPR or SUPPLY OFF position? (in case of engine fire, we can use the engine fire switch).
-Why this switch (with 3 positions) is no longer in use on the recent aircrafts? (even on the old ones like 737-200....)
Thank you.
Best regards