HYDRAULICS

Hydraulics

60 psi Open Center System

1500  psi Operating

Landing Gear

Electricaly Activated  Hydraulically Actuated

Up-Mechanical Up-Locks

Down -Mechanical Down Locks

Freefall / Blowdown System

Check the Gear is Down:

* AOA Indexer on Glareshield

* Flaps Beyond Approach

  No Horn

* Speed Below 150 KIAS

  No Horn

* Altitude Below 500"

  No Horn

* HYD PRESS Light Out

* Rotary Switch - Test

* Three Green Lights

Speed Brakes

Electricaly Activated  Hydraulically Actuated

Held Up - Trapped Hydraulic Pressure

Held Down - Mechanically

Loss of DC Power - Blow to Trail

Loss of Hyd Press - Blow to Trail

Retracted:

* Switch

* 80 - 85% Throttle Position

Thrust Reversers

Electricaly Activated  Hydraulically Actuated

Stowed - Overcenter Mechanical Lock

Deployed - Constant Hydraulic Pressure

Flaps

Electricaly Activated  Hydraulically Actuated

Loss of DC Power  - Remain in Last Selected Position

Loss of Hyd  Press - Flap Handle Moved, Blow to Trail

Fowler Flap Design

Mechanical Interconnect - Prevents Asymmetrical Flap Condition

Horizontal Stabilizer

Flaps Up - Stab Up (+1º)

Flaps Down - Stab Down (-2º)

If Flaps are selected down with airspeed >200 KIAS, airspeed switch will prevent STAB movement.

"STAB MIS COMP"  light after 30 secs.

Brakes:

900-1300 psi normal press

750 psi low brake press light

Anti-Skid Light

* Batt Switch On

* A/Skid Switch Turned Off

* Rotary Swith (6secs)

* Anti-Skid Fault Detected

* Low Brake Pressure

Operates only above 10 knots

Resevoir is pressurized by cabin air.

Emergency Brakes

Nitrogen Air Bottle

1800 - 2050 psi

* Emergency Braking

(10 brake applications)

* Emergency Gear Extension (5 brake applications if used to lower landing gear)

Hydraulic Pressure On:

Altitude and Airspeed restricted to a Maximum of FL 310 and 200 KIAS, to provide adequate cooling of the Hydraulic System under pressure.