B748 demand pumps

Reply Subscribe

Thread Tools

Search this Thread

16th January 2025 | 06:55

#1 (permalink)

SRS

Thread Starter

Joined: Feb 2006

Posts: 107

Likes: 0

From: UK

B748 demand pumps

Not sure if the hydraulic demand pumps can operate the gear and flaps normally without the engine driven pumps.

16th January 2025 | 15:49

#2 (permalink)

Amadis of Gaul

Joined: Jun 2014

Posts: 1,052

Likes: 72

From: Village of Santo Poco

I'm not sure either.

16th January 2025 | 16:59

#3 (permalink)

Avinthenews

Joined: Mar 2015

Posts: 336

Likes: 2

From: Australia

Yes they can, it’s just slower.

You can have either the EDP or the DEM pump Inoperative as per the MEL.

21st January 2025 | 13:28

#4 (permalink)

boeing747430

Joined: Aug 2024

Posts: 4

Likes: 0

From: Germany

Since they are designed to take the full load after engine shutdown with a fire switch, it poses no problem at all. Neither in the 744. You can eve dispatch with the pump removed alltogether.

25th January 2025 | 00:42

#5 (permalink)

CV880

Joined: Nov 2004

Posts: 259

Likes: 57

From: Asia

Demand Pumps are used to do many maintenance functions including flap operation, gear retractions etc.

Reply Subscribe

Posting Rules

You may not post new threads

You may not post replies

You may not post attachments

You may not edit your posts

BB code is On

Smilies are On

[IMG] code is On

HTML code is Off

Trackbacks are Off

Pingbacks are Off

Refbacks are Off

Forum Rules

Reply Share

First
Prev
1 / 1
Next
Last