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F/A-18 E/F > Hydraulic System > Flashcards

Hydraulic System Flashcards

1
Q

Utility PSI

A

3,000 psi

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2
Q

Hyd 3000psi Limits

A

2600-3300 psi

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3
Q

Hyd 5000psi Limits

A

4500-5400 psi

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4
Q

High Mode Pump

A

> 380 KCAS

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5
Q

High Mode Pump Single Engine

A

> 500 KCAS

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6
Q

RLS (Reservoir Leak Sensing) Scheduling

A

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

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7
Q

Brake ACC Norm

A

3000 psi

10 Brake Applications

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8
Q

BRK ACC Caution

A

2000 psi

5 Brake applications

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9
Q

Brake ACC preflight Min

A

2600 psi

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10
Q

APU ACCUM Caution

A

2450 psi

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11
Q

APU ACC Gauge

A

3000 psi

Under right wheel well

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12
Q

HYD 1 Powers

A

Flight Controls only

Pump on left AMAD

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13
Q

HYD 2 Powers

A

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

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14
Q

Switching Valves

A

Located on all flight controls and activates when primary circuit pressure

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15
Q

APU & Brake Accumulators

A

3000 psi each

Both maintain pressure by trickle-charge from HYD 2A

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16
Q

APU Accum Recharge

A

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

17
Q

BRK ACCUUM Recharge

A

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

18
Q

APU Accumulator

A

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
19
Q

Gear Extension

A

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

20
Q

Emergency Landing Gear Extension

A

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

21
Q

Downlock Oride

A

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

22
Q

Wheel Warning

A

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

23
Q

NWS Low/High

A

Low - 22.5 deg

High - 75 deg

24
Q

NWS Powered By

A

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

25
Q

EMERG NWS

A

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

26
Q

HYD Caution

A

Comes on at 1400psi

27
Q

Anti Skid Inoperative if

A
28
Q

Anti Skid Wheel Spin Up

A

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

29
Q

Anti Skid - Skid Control

A

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

30
Q

Locked Wheel Protection

A

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

31
Q

Anti Skid IBIT

A

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

32
Q

Parking Brake Set Runs…

A

Anti Skid BIT, GEN TIE Logic, and INS Alignment

33
Q

PARK BRAKE Caution

A

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

34
Q

Launch Bar

A

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

35
Q

Arresting Hook

A

Powered by HYD 2B to retract to overcome snubber pressure

36
Q

Power Transmission Shaft Failure

A

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

37
Q

Single Circuit Hyd Failure

A

All flight controls operative

38
Q

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

A
  • Hyd Pump Failure
  • Hyd Pump Shaft Shear
  • Hyd 1/2 Leak (RLS sequencing)
  • Power Transmission Shaft Failure
39
Q

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

A

Will result in degraded flight qualities but will be controllable

F/A-18 E/F (9 decks)

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