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Forum: Tech Log

3rd Oct 2008, 01:58

Replies: 95

B747 Back up Hydraulics

Views: 16,000

Posted By Earl

The lengthy period with alternate flaps is just...

The lengthy period with alternate flaps is just between flap 1 and 5, the rest of the way is a little slower than normal but not so bad.
Lots of distance to cover between flaps 1 and 5.
The only...

Forum: Tech Log

1st Oct 2008, 06:03

Replies: 95

B747 Back up Hydraulics

Views: 16,000

Posted By Earl

As for the aircraft that have the rat it is only...

As for the aircraft that have the rat it is only effective with the airspeed.
747 classic has no Rat.
Forgot the numbers for the Tristar but do know with the airbus 300 its useless below 130 kts....

Forum: Tech Log

1st Oct 2008, 03:33

Replies: 95

B747 Back up Hydraulics

Views: 16,000

Posted By Earl

411A, Flaps 10 would have not given them a...

411A,
Flaps 10 would have not given them a takeoff warning.
1.Takeoff warning is Leading edge flaps extended.
2. Trailing edge flaps takeoff position, either 10 or 20.
3. Spoilers armed.
4. Body...

Forum: Tech Log

1st Oct 2008, 03:13

Replies: 95

B747 Back up Hydraulics

Views: 16,000

Posted By Earl

classic Hyd

Brakes can be selected to system 1 on the F/E panel if needed.
But you need to make sure that you have accumulator pressure showing in the brake pressure gauge.
If not and you shift system 4 to...

Forum: Tech Log

30th Sep 2008, 04:54

Replies: 95

B747 Back up Hydraulics

Views: 16,000

Posted By Earl

Some 747 classics have a electric pump for number...

Some 747 classics have a electric pump for number 1 system also, I think the old JAL classics had this and a few others.
Both the number 1 and number 4 electric pumps get there power from the ground...

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