HYD ISOL to ORIDE from HYD 2B - Recharge requires about 20sec following emerg gear ext - 40sec following in-flight APU Start Can recharge on ground with hand pump in right wheel well

Hydraulic System Flashcards by Chris Kap

Utility PSI

3,000 psi

How well did you know this?

Not at all

Perfectly

Hyd 3000psi Limits

2600-3300 psi

How well did you know this?

Not at all

Perfectly

Hyd 5000psi Limits

4500-5400 psi

How well did you know this?

Not at all

Perfectly

High Mode Pump

> 380 KCAS

How well did you know this?

Not at all

Perfectly

High Mode Pump Single Engine

> 500 KCAS

How well did you know this?

Not at all

Perfectly

RLS (Reservoir Leak Sensing) Scheduling

50% fluid - A off
30% fluid - A on, B off
15% fluid - Both A and B on

How well did you know this?

Not at all

Perfectly

Brake ACC Norm

3000 psi

10 Brake Applications

How well did you know this?

Not at all

Perfectly

BRK ACC Caution

2000 psi

5 Brake applications

How well did you know this?

Not at all

Perfectly

Brake ACC preflight Min

2600 psi

How well did you know this?

Not at all

Perfectly

APU ACCUM Caution

2450 psi

How well did you know this?

Not at all

Perfectly

APU ACC Gauge

3000 psi

Under right wheel well

How well did you know this?

Not at all

Perfectly

HYD 1 Powers

Flight Controls only

Pump on left AMAD

How well did you know this?

Not at all

Perfectly

HYD 2 Powers

Flight Controls and Utilities
Pump mounted on Right AMAD
Larger reservoir due to utilities

How well did you know this?

Not at all

Perfectly

Switching Valves

Located on all flight controls and activates when primary circuit pressure

How well did you know this?

Not at all

Perfectly

APU & Brake Accumulators

3000 psi each

Both maintain pressure by trickle-charge from HYD 2A

How well did you know this?

Not at all

Perfectly

APU Accum Recharge

HYD ISOL to ORIDE from HYD 2B

Recharge requires about 20sec following emerg gear ext
40sec following in-flight APU Start

Can recharge on ground with hand pump in right wheel well

BRK ACCUUM Recharge

HYD ISOL to ORIDE with Emergency Gear probe to open arm valve

APU Accumulator

Normally used for engine start

With HYD 2 Fail, APU Accum powers

In Flight: Emergency Gear and Emergency Probe
On Deck: Emergency NWS and Emergency Brake

Gear Extension

Electrically controlled, hydraulically powered by HYD 2A

If nose WonW switch or launch bar failed to retract, nose gear will not retract but main gears will

Emergency Landing Gear Extension

Mechanically controlled, Hydraulically actuated by APU Accum

APU Accum unlocks doors, releases uplocks, pushes downlock actuators in nose & main gear
This can be done with gear handle up or down, gear will free fall and must be

Downlock Oride

Overrides solenoid to retract mechanical stop and moves landing gear handle up

If failed, could indicate gear problems so only cycle gear if in emergency

Wheel Warning

Gear Warning comes on:

Gear not down and locked
7500 ft
-250ft/min rate of descent

Tone will sound
- Red gear light on >15sec

Flashing green main gear light
- Planing Link Failure

NWS Low/High

Low - 22.5 deg

High - 75 deg

NWS Powered By

Pri - HYD 2A
Sec- HYD 2B
Tertiary - APU Accum

EMERG NWS

Emerg Hi Gain NWS with FCS CH2 or CH4 fail Pull FCS CB Unlock Wings Press NWS button

HYD Caution

Comes on at 1400psi

Anti Skid Inoperative if

Anti Skid Wheel Spin Up

Activates at 50kts to allow normal braking if right WonW switch fails

Anti Skid - Skid Control

Limits HYD 2A pressure to both brakes as required if wheel speed is not right (skid detection)

Locked Wheel Protection

If one wheel speed is 40% less than other, dumps break pressure to both until wheel speeds match within 40%, disabled below 35kts

Anti Skid IBIT

Activated when gear is lowered, SKID switch turned from off to on, or on ground with parking break set Starts after 9 sec, takes 4.5 secs, stopped if parking brake released

Parking Brake Set Runs...

Anti Skid BIT, GEN TIE Logic, and INS Alignment

PARK BRAKE Caution

Comes on if parking brake is set and N2 is >80%

Launch Bar

Powered by HYD 2A to extend and hold down launch bar Failure to put Launch Bar in to retract on cat shot could lead to loss of HYD 2A

Arresting Hook

Power Transmission Shaft Failure

GEN, DC FAIL, BOOST LO, HYD A, HYD B, no pressure fluctuations

Single Circuit Hyd Failure

All flight controls operative

Dual Circuit 1A&1B or 2A&2B Caused by

- Hyd Pump Failure - Hyd Pump Shaft Shear - Hyd 1/2 Leak (RLS sequencing) - Power Transmission Shaft Failure

Any Other Dual Circuit other than 1A/B or 2A/B

Will result in degraded flight qualities but will be controllable