Md11 Systems - Hydraulics

Front 1

Hydraulic System

SELECT
------------
MANUAL

Back 1

Both lights = system switched to manual mode. Press to lock in MANUAL.

MANUAL Lt = System operating in manual mode.

Front 2

Hydraulic System 1,2 or 3 PRESS Light indicates what?

Consequence?

Back 2

< 2400 psi or > 3500 psi

Right pump turns ON

Front 3

Electric Aux Pumps location

Back 3

both in right well well

Front 4

How do you start the Electric Aux Pumps?

Back 4

Aux Pump switch(es) on Overhead or Brake Control Panel, ADG Handle, HYD Test Switch

Front 5

When does the Electric Aux Pump go OFF automatically?

Back 5

First fuel switch ON during start

Front 6

Where do Electric Aux pumps get power?

Back 6

Normal Ground Service Bus and Emergency from ADG

Front 7

RMPs turn ON when?

Back 7

<2400 psi any system (Taxi, TO, Lndg)
<45% N2 any engine (Taxi, TO, Lndg)
Fire handle pulled
Auto Slat Extension (stick shaker)
Second engine or hyd sys loss in cruise
Hydraulic Test
Manual reversion from Auto mode

Front 8

RMPs OFF when (auto mode)

Back 8

Reservoir qty <1 gal on either side of RMP
ADG deployed (Elec switch OFF)
Cruise with 2 systems operative
Engine start in flight

Front 9

Hydraulic pump switches

FAULT
-----------
OFF (6 times)

Back 9

Fault = Low press (<2400 psi) or Hi temp (>245 deg)

OFF = Commanded OFF
System or pump pressure low or hi
Fluid quantity <2.5 gals
System Temp Hi
During Engine Start
Fire Handle Pulled

Front 10

RMP location

Back 10

Center Wheel Well

Front 11

What is an NRMP?

Back 11

Non-reversible Motor Pump (2-1, 3-2).

Alternate source of hydraulic power to the rudder and stab when system 1 or 2 is lost

Front 12

What fluid does the NRMP use?

Back 12

Has its own fluid / lines
- Compensator
- 1 gal capacity
- <1 qt NRMP SOV closes and NRMP inop

Front 13

When does the NRMP activate?

Back 13

When system 1 or 2 press drops below 2000 psi +/-200

Front 14

NRMP Powers what?

Back 14

Hyd System 1 loss - 2-1 NRMP powers Upper Rudder and Horizontal Stab

Hyd System 2 loss - 3-2 NRMP powers Lower Rudder

Front 15

Hydraulic Reservoir(s) Location

Back 15

1 - Left Wheel Well
2 - Tail
3 - Right Wheel Well

Front 16

Hydraulic Reservoir(s) Capacity

Back 16

12.0 Gallons

Front 17

Minimum Hydraulic Quantity for Dispatch

Back 17

System 3 - 6 gallons

System 1&2 - 4.75 gallons

Front 18

HYD QTY LO (alert)

Back 18

<6.0 gallons - system 3 (engines OFF)

<4.75 gallons - sys 1&2 (engines OFF)

2.5 gallons - all systems, engines running

Front 19

HYD SYS FAIL (alert)

Back 19

respective system quantity 1 gallon

Front 20

What is powered by Hydraulic System 1?

Back 20

[SAFER R NTSB]

Spoilers
Ailerons
Flaps
Elevators
Rudder (upper)

Reverser (PW)

Nosewheel Steering
Trim
Slats
Brakes

Front 21

What is powered by Hydraulic System 2?

Back 21

[SAFER R]

Spoilers
Ailerons
Flaps
Elevators
Rudder (lower)

Reverser (PW)

Front 22

What is powered by Hydraulic System 3?

Back 22

[SALE R NTSB]

Spoilers
Ailerons
Landing Gear
Elevator

Reverser (PW)

Nose wheel steering
Trim (stab)
Slats
Brakes

Front 23

1 - What is the Enhancement Valve?

2 - When does it operate?

3 - What are the remaining flight controls?

Back 23

1 - Valve that closes to protect flight controls with hydraulic system 3 loss

2 - System 3 </= 4.75 gals (HYD 3 ELEV OFF)

Valve at pressure bulkhead in System 3 closes

3 - Spoilers, Ailerons, Stab Trim

Front 24

Autopilot use with hydraulic system loss

Back 24

Loose system 1 - use AP 1
Loose system 2 or 3 - use AP 2