Flight Controls General Knowledge

Question 1

Q.5.8 What does illumination of the SPEEDBRAKES
EXTENDED light indicate while in flight?

Answer 1

NG and MAX: The speed brake lever is beyond the
ARMED position, and the flap lever setting is more
than flaps 10, or the radio altitude less than 800 ft.
MAX: Thrust levers are above idle with the speed
brake extended beyond the ARMED position.

Reference: FRM B737-700/-800 9.1.5,
FRM B737MAX 9.1.6, NG QRH 9.17, MAX QRH 9.16

Question 2

Q.5.9 What does illumination of the Assist ON light
indicate in the B737MAX?

Answer 2

The Elevator Jam Landing Assist function is
activated.

Reference: FRM B737MAX 9.1.2, MAX QRH 9.4

Question 3

Q.5.10 What does illumination of the SPOILERS light
indicate in the B737MAX? Spoiler system fault.

Answer 3

Spoiler system fault.

Reference: MAX QRH 9.17, FRM B737MAX 9.1.1

Question 4

Q.5.11 What is the purpose of the Elevator Jam
Landing Assist System in the MAX aircraft?

Answer 4

To assist the Pilots while on approach and landing
during manual flight in an elevator jam condition.
▪ When the Autopilot is disengaged
▪ Flaps are 1 or greater
▪ The Elevator Landing Assist switch is selected ON

Reference: FRM B737MAX 9.2.5.1.2

Question 5

Q.5.12 What does illumination of the SPEED TRIM FAIL
light indicate when the MASTER CAUTION recall is
activated and extinguishes when the MASTER CAUTION
is reset?

Answer 5

Failure of a single FCC channel.

Reference: FRM 9.1.1

Question 6

Q.5.13 What does the Flight Control LOW PRESSURE
light indicate?

Answer 6

Low hydraulic system (A or B) pressure to ailerons,
elevator, and rudder.

Reference: FRM 9.1.1

Question 7

Q.5.14 What does the FEEL DIFF PRESS indicate?

Answer 7

When either hydraulic system or elevator feel pitot system fails,
excessive differential hydraulic pressure is sensed in the elevator feel computer.

Reference: FRM 9.1.1, 9.2.5.1.2

Question 8

Q.5.15 Do not extend flaps above what pressure altitude?

Answer 8

20,000 ft; to prevent excessive structural loads fromWhy?
increased Mach at higher altitude.

Reference: AOM 3.9, FRM B737-700/-800 9.2.8

Question 9

Q.5.16 What is the Alternate Flap duty cycle?

Answer 9

Alternate flap duty cycle in flight is one complete cycle, then five minutes off.
A complete cycle is movement from position 0° to 15° and back to 0°.
The ALTERNATE FLAPS position switch must be in the OFF position for 15
seconds before reversing the direction of flap movement.

Reference: AOM 3.9, FRM 9.1.1

Question 10

Q.5.17 Can the LE devices be retracted by the standby
hydraulic pump?

Answer 10

No.

Reference: FRM 9.2.8.4

Question 11

Q.5.18 How do you control pitch and roll in manual
reversion?

Answer 11

Ailerons and elevators in manual reversion are
mechanically actuated without hydraulic assist. The
stabilizer trim can be controlled electrically via the electric
trim switch or manually via the stabilizer trim wheel.

Reference: AOM 5.11.2, FRM B737-700/-800 9.2.4.1, MAX 9.2.5.1

Question 12

Q.5.18 How do you control pitch and roll in manual
reversion?

Answer 12

Ailerons and elevators in manual reversion are
mechanically actuated without hydraulic assist. The
stabilizer trim can be controlled electrically via the electric
trim switch or manually via the stabilizer trim wheel.

Reference: AOM 5.11.2, FRM B737-700/-800 9.2.4.1, MAX 9.2.5.1