B747-400 - FLAPS QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

B747-400 - FLAPS QUESTIONS AND ANSWERS WITH COMPLETE

SOLUTIONS VERIFIED


What are the flap takeoff settings?

10 or 20

What are the landing flap settings?

25 or 30

Where is the go-around flap detent installed?

20

What are the 3 group of Leading Edge (LE) Flaps?

Outboard

Midspan

Inboard

How many drive units are installed with each group of LE flaps?

1 drive unit per group

How are the drive units powered ?

Pneumatically

Electric motor but at a slower rate

How many groups of Trailing Edge (TE) Flaps are there?

2

Outboard

Inboard

, How many drive units are installed with each group of TE flaps?

1 drive unit per group

How are the the TE Flaps powered?

Outboard - Hydraulic System 4

Inboard - Hydraulic System 1

What are the flap operating modes?

Primary

Secondary

Alternate

What are the differences between Primary/Secondary & Alternate flap modes?

P/S use 3 identical Flap Control Units (FCUs)

Alternate mode does not use FCUs

Beyond the Flap 5 setting, will the LE Flaps continue to EXTEND?

NO

When do the INBOARD & MIDSPAN LE Flaps FULLY retract?

Upon selection of Flaps UP

Upon selection of Flaps 1, which flaps are deployed?

Midspan & Inboard LE Flaps

How does the pilot extend the flaps using the alternate method?

Arm ALTN

What happens when the ALTN FLAPS selector is moved to EXT?

ALL TE & LE Flap Groups extend immediately