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FCOM System Description > 9. Flight Controls > Flashcards

9. Flight Controls Flashcards

1
Q

FLT CONTROL Switches

A

STBY RUD:
- Activates Standby Hydraulic Pump,
- Opens Standby Rudder Shutoff Valve to,
- Pressurize Standby Rudder Power Control Unit

OFF:
- Closes Flight Control Shutoff Valve,
- Isolating Ailerons, Elevators and Rudder from associated hydraulic system pressure

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2
Q

Flight Control LOW PRESSURE Lights

A
  • Indicates low hydraulic pressure to ailerons, elevator and rudder,
  • Deactivated when related FLT CONTROL switch is positioned to STBY RUD and Standby Rudder SOV opens
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3
Q

YAW DAMPER Switch ON

A
  • Engages Main Yaw Damper to Main Rudder Power Control Unit if the B FLT CONTROL switch is ON,
  • Engages Standby Yaw Damper to Standby Rudder Power Control Unit if both FLT CONTROL switches in STBY RUD
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4
Q

STANDBY HYD Lights

A

LOW QUANTITY:
- Always armed

LOW PRESSURE:
- Armed only when Standby Pump operation selected or automatically activated

STBY RUD ON:
- Indicates the Standby Rudder System is commanded on to,
- Pressurize the Standby Rudder Power Control Unit

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5
Q

ALTERNATE FLAPS Master Switch ARM

A
  • Closes TE Flap Bypass Valve,
  • Activates Standby Pump,
  • Arms the ALTERNATE FLAPS position switch
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6
Q

ALTERNATE FLAPS Position Switch

A

UP:
- Electrically retracts TE Flaps,
- LE devices remain extended and cannot be retracted by Alternate Flap System

DOWN:
- Momentary push fully extends LE Devices using Standby Hydraulic Pressure,
- Holding down electrically extends TE Flaps until released

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7
Q

FEEL DIFF PRESS Light

A
  • Armed when the TE Flaps are up or down,
  • Indicates excessive differential pressure in the Elevator Feel Computer,
  • Excessive pressure difference can be caused by erroneous activation of the Elevator Shift Module
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8
Q

SPEED TRIM FAIL Light

A
  • Indicates failure of the Speed Trim System,
  • Indicates failure of a single FCC channel during RECALL and extinguishes after reset
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9
Q

MACH TRIM FAIL Light

A
  • Indicates failure of the Mach Trim System,
  • Indicates failure of a single FCC channel during RECALL and extinguishes after reset
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10
Q

AUTO SLAT FAIL Light

A
  • Indicates failure of the Auto Slat System,
  • Indicates failure of a single SMYD Computer during RECALL and extinguishes after reset
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11
Q

SPEED BRAKE DO NOT ARMED Light

A
  • Deactivated when SPEED BRAKE Lever is in the DOWN position,
  • Indicates abnormal condition or test inputs to the Automatic Speed Brake system or,
  • During landing, indicates wheel speed < 60KT and the Speed Brake Lever is not in DOWN
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12
Q

SPEED BRAKES EXTENDED Light

A

Inflight:
- SPEED BRAKE Lever beyond the ARMED position and,
- TE Flaps 15 or more or,
- RA < 800FT

On the ground:
- SPEED BRAKE Lever is in the DOWN detent and,
- Ground Spoilers are not stowed,
- Not illuminate if Hydraulic System A pressure is < 750psi

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13
Q

FLAP Lever

A
  • Selects position of Flap Control Valve, directing hydraulic pressure for Flap Drive Unit,
  • Flap Lever positions 30 and 40 arms the Flap Load Relief System,
  • Flap Lever positions 10 or more arms the Flap Load Relief System (SFP)
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14
Q

Flap Gates

A

Prevents inadvertent Flap Lever movement during go-arounds

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15
Q

LE FLAPS TRANSIT Light

A
  • Any LE Device in transit,
  • Any LE Device not in programmed position with respect to TE Flaps,
  • A LE uncommanded motion exists (2 or more LE Flaps or Slats have moved away from commanded position),
  • During Alternate Flap extension until LE Devices fully extended and TE Flaps reach 10 (15 for SFP),
  • Light is inhibited during Autoslat operation
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16
Q

LE FLAPS EXT Light

A
  • All LE Flaps extended and all LE Slats in extended position (TE Flap positions 1,2 and 5 / 1 to 25 for SFP),
  • All LE Devices fully extended (TE Flap positions 10 to 40 / 30 and 40 for SFP)
17
Q

Primary Flight Controls Power Sources

A
  • Either hydraulic system can operate all Primary Flight Controls,
  • Ailerons and Elevator may be operated manually,
  • Rudder may be operated by Standby Hydraulic System
18
Q

Secondary Flight Controls Power Sources

A
  • TE Flaps, LE Flaps and Slats are powered by hydraulic system B,
  • If system B fails, TE Flaps can be operated electrically,
  • Under certain conditions PTU automatically powers the LE devices,
  • LE devices can also be extended using Standby Hydraulic pressure

FCOM System Description (10 decks)

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