E-JETS-FANFLIGHT COMPANION
FOR MICROSOFT FLIGHT SIMULATOR 2024FLIGHTSIM STUDIO E-JETS
FLIGHTSIM STUDIO E-JETSE170E175E190E195
E-JETS / FLIGHT COMPANION / HYDRAULIC PUMP AUTO LOGICGuide overview
SYSTEMS / HYDRAULICS

Hydraulic pump AUTO logic

E175 HYDRAULIC overhead panel
E175 HYDRAULIC overhead panel [52]

FSS describes electric pumps 1 and 2 as backups to their respective engine-driven pumps. System 3 uses separate electric pumps 3A and 3B. For pumps with an AUTO position, the system decides when the pump should run; ON commands operation. A switch position alone is not a pressure indication.

Pump selectors

Find the electric pump selectors and system 3A / 3B controls on the overhead. Match each control to the hydraulic synoptic.

Read the conditions

For pumps 1 and 2 in AUTO, FSS describes operation in flight if the associated engine or engine-driven pump fails, or if flaps are selected beyond zero. On the ground, it lists flaps beyond zero together with takeoff thrust or groundspeed above 50 kt. Pump 2 also has the single-engine taxi condition below.

Pump and pressure indications

After a configuration change, use HYDR to check the pump symbol and pressure. Use EICAS to confirm the related engine condition. Give the system time to respond.

Pump procedures

Follow the normal or supplementary FSS procedure for the situation. Single-engine taxi and abnormal operations depend on exact conditions and variant.

Pressure mismatch

Compare the pump symbol and pressure with the engine, flap and ground or flight conditions. For pump 2, also check whether engine 1 is running and the parking brake is released. Use the procedure for the current configuration.

The FSS hydraulic page [54] notes pump 2 AUTO operation with engine 1 running and the parking brake released. It also says pump 3A is powered by AC ESS BUS and highlights that sentence in red. The current Welcome page does not explain the highlighting. HYDR, ELEC and Service Update 1 do not independently confirm the pump 3A feed, so treat it as unconfirmed and check the pump, pressure and bus indications in your aircraft.

For system 3, FSS lists OFF and ON for pump 3A. Pump 3B also has AUTO: in that position it runs automatically if pump 3A fails. The same page says the power transfer unit does not operate on the ground. Check the actual pump and pressure indications in your installed version.