Flight Controls

Question 1

You are at 4000 ft, configuring for landing. PF calls for “Flaps 5.” The PM repeats the command, and then moves the flap handle from “UP” to the F5 position. The PM monitors the Flap Position Indicator, but soon says “Uh oh, the flaps are stuck.”

Q.5.1 What is your priority?

Answer 1

MATM, including if the Non-Normal flap condition has any effect on aircraft controllability.

FOM 5.1 General, AOM 5.1.1

Question 2

You are at 4000 ft, configuring for landing. PF calls for “Flaps 5.” The PM repeats the command, and then moves the flap handle from “UP” to the F5 position. The PM monitors the Flap Position Indicator, but soon says “Uh oh, the flaps are stuck.”

Q.5.2 Is your phase of flight relevant?

Answer 2

Yes. You are on approach and not in a clean configuration. You need to execute a missed approach and coordinate for airspace to continue corrective action(s).

FOM 5.1 General, AOM 5.1.1

Question 3

Q.5.3 What is a risk with the go-around specific to a stuck flaps non-normal condition?

Answer 3

You do not want to change the flap setting.

FOM 5.1 General, AOM 5.1.1

Question 4

Q.5.4 After the missed approach for “stuck flaps”, you proceed on the published missed. The holding pattern is 15 nm away: is there anything you can be doing during this time?

Answer 4

QRH for Trailing Edge Flap Disagree. Also, assess any future impact of the Non-normal (the QRH can help you with that assessment).

AOM 2.2.3.1

Question 5

Q.5.5 As you read through the QRH for Trailing edge Flaps Disagree you assess that there is not any flap asymmetry, and that the flaps are stuck between Flaps 2 and Flaps 5, which leads you to step 5: Plan to extend flaps to 15 using alternate flap extension. Before you continue with that step, what are some considerations regarding impact now and in the future?

Answer 5

1. Extra time to complete the alternate flap extension
2. Limitations associated with it
3. Unfamiliarity with a flaps 15 landing, landing distance considerations

QRH 9.24, AOM 3.9

Question 6

Q.5.6 As you go through the rest of the Trailing edge Flaps Disagree QRH, what other things would you discover that may have an impact on the rest of the flight?

Answer 6

1. Alt flap extension time to F15 is approximately 2 minutes
2. Drag penalty with LEDs extended will impact fuel burn
3. Icing conditions considerations
4. PWB entry of the specific non-normal condition
5. 230K max airspeed limitation
6. The need to be watchful for any flap asymmetry during alt flap extension

QRH 9.24, FOM 2.2.3.1

Question 7

Q.5.7 Once you have taken care of all of the corrective actions in the Trailing edge Flaps Disagree QRH Checklist and are ready to begin the approach, and as time allows, what are some other things that you need to consider?

Answer 7

1. Brake cooling
2. Communication to Company (Dispatch/TechOps/Station Ops)
3. Communication to Flight Attendants
4. Communication to Passengers
5. Logbook Entry
6. Is an Irregularity Report/Immediate notification required? (Not under Flight Controls: under SYS MALF)

FOM 2.2.3.1, 22.1.2

Question 8

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

Answer 8

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.

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

Question 9

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

Answer 9

Spoiler system fault.

MAX QRH 9.17, FRM B737MAX 9.1.1

Question 10

Q.5.10 What does illumination of the Assist ON light indicate in the B737MAX?

Answer 10

The Elevator Jam Landing Assist function is activated.

FRM B737MAX 9.1.2, MAX QRH 9.4

Question 11

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

Answer 11

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

FRM B737MAX 9.2.5.1.2

Question 12

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 12

Failure of a single FCC channel

FRM 9.1.1

Question 13

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

Answer 13

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

FRM 9.1.1

Question 14

Q.5.14 What does the FEEL DIFF PRESS indicate?

Answer 14

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

FRM 9.1.1, 9.2.5

Question 15

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

Answer 15

20,000ft; To prevent excessive structural loads from increased Mach at higher altitude.

AOM 3.9, FRM B737-700/-800 9.2.8

Question 16

Q.5.16 What is the Alternate Flap duty cycle?

Answer 16

Alternate flap duty cycle in flight is one complete cycle, then 5 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

Question 17

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

Answer 17

No

FRM 9.2.8.4

Question 18

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

Answer 18

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.

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