DB's SY 737 Flight Control Panel

Question 0

Flight Control Switches - STBY RUD

Answer 0

1. Activates STBY hydraulic pump
2. Opens STBY RUD SOV which pressurizes STBY RUD PCU
3. Deactivates the Flight Control LOW PRESSURE light
4. Activates the STANDBY HYDRAULIC LOW PRESSURE light
5. Illuminates the STBY RUD ON light

Question 1

Flight Control Switches - OFF

Answer 1

Closes flight control SOV, isolating flight controls from hydraulic pressure

Question 2

Flight Control LOW PRESSURE lights on

Answer 2

Indicates low hydraulic system (A or B) pressure to flight controls

Question 3

When are the Flight Control LOW PRESSURE lights deactivated?

Answer 3

When the associated FLIGHT CONTROL switch is STBY RUD and STBY RUD SOV opens.

Question 4

Flight Spoiler Switches

Answer 4

Mx only.

Used to close the flight spoiler SOV

Question 5

YAW DAMPER light on

Answer 5

Yaw damper is not engaged.

Question 6

YAW DAMPER switch - OFF

Answer 6

Disengages yaw damper.

Question 7

YAW DAMPER switch - ON

Answer 7

• If B FLT CONTROL switch is ON, engages main yaw damper to main rudder PCU.
• If both A and B FLT CONTROL switches are STBY RUD (manual reversion), engages STBY yaw damper to STBY RUD PCU

Question 8

When will the Yaw Damper automatically disengage?

Answer 8

1. SMYD senses a fault
2. Yaw Damper does not respond to a command
3. B FLT CONTROL switch is OFF or STBY RUD

Question 9

STANDBY HYDRAULIC LOW QUANTITY light

1. Indicates what?
2. When armed?

Answer 9

1. Indicates low quantity in standby hydraulic reservoir (below 50%)
2. Always armed

Question 10

STANDBY HYDRAULIC LOW PRESSURE light

1. Indicates what?
2. When armed?

Answer 10

1. Indicates output pressure of standby pump is low

2. Armed only when standby pump is activated.

Question 11

STBY RUD ON light - illuminated (Amber)

Answer 11

Standby rudder system is commanded on to pressurize STBY RUD PCU

Question 12

ALTERNATE FLAPS Master Switch - OFF

Answer 12

Normal position

Question 13

ALTERNATE FLAPS Master Switch - ARM

Answer 13

1. Closes TE flap bypass valve
2. Activates STBY pump
3. Arms the ALT FLAPS position switch

Question 14

When does the ALTERNATE FLAPS Position Switch function?

Answer 14

Only when ALT FLAPS Master Switch is in ARM.

Question 15

ALTERNATE FLAPS Position Switch - OFF

Answer 15

Normal position

spring loaded here

Question 16

ALTERNATE FLAPS Position Switch - DOWN

Answer 16

• (momentary) fully extends LE devices using STBY Hydraulic pressure
• (hold) electronically extends TE flaps until released

Question 17

ALTERNATE FLAPS Position Switch - UP

Answer 17

• Electrically retracts TE flaps

* LE devices remain extended and cannot be retracted.

Question 18

FEEL
DIFF PRESS
light - ON

Answer 18

Excessive differential pressure in the elevator feel computer.

Question 19

SPEED TRIM FAIL light

1. ON
2. Recall

Answer 19

1. Failure of speed trim system

2. Failure of single FCC channel

Question 20

What are the conditions for the Speed Trim system to operate?

Answer 20

5-10 AAS
• 5 seconds after trimming
• 10 seconds after takeoff
• Airspeed between 100 kts and .60 (fade out to zero by .68)
• Autopilot not engaged
• Sensing a need for trim

Question 21

MACH TRIM FAIL light

1. On
2. Recall

Answer 21

1. Failure of Mach trim system

2. Failure of a single FCC channel

Question 22

What speeds are the Mach Trim system active?

Answer 22

.615 and higher

Question 23

AUTO SLAT FAIL light

1. On
2. Recall

Answer 23

1. Failure of auto slat system

2. Failure of a single Stall Management/Yaw Damper (SMYD) computer

Question 24

When is the Autoslat function available?

Answer 24

At flap positions 1, 2, and 5.

Question 25

SPEED BRAKES EXTENDED light - illuminated (Amber)

1. In flight
2. On the ground

Answer 25

1. Speed brake lever is beyond ARMED position and
   A. TE flaps extended beyond 10 or
   B. Radio Altitude less than 800ft
2. SPEED BRAKE lever is in the DOWN detent and the ground spoilers are not stowed (inhibited when hydraulic system A pressure is less than 750psi)