PPRuNe Forums - LHR Go-arounds 2 Nov

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CHINOOKER

3rd Nov 2017 19:36

Many thanks to all for your replies,especially Flying Fred.....your insight as to how the flight crew call it was most informative!. From the ground,we will have a much better understanding and appreciation of what is happening next time we view a go-around. cheers!

Cough

5th Nov 2017 12:56

GlenQuagmire... The usual reason for leaving the gear dangling after a normal takeoff is a brake unit locked out. You give it around 2 minutes (precise time depends on type) for the wheel to spin down prior to retracting the gear.

Hope that helps...

DaveReidUK

5th Nov 2017 16:52

Quote:

Originally Posted by Flying Fred (Post 9945287)

The usual reason for leaving the gear down after takeoff is because a wheel brake has been deactivated. This is an allowable defect. In a normal gear retraction, the brakes are automatically applied to the main gear wheels so that the wheels have stopped spinning by the time they enter the gear bay. In the case of a deactivated brake, the wheels have to be left down for 2 min after takeoff to allow the wheels to stop spinning.

Quote:

Originally Posted by Cough (Post 9947304)

The usual reason for leaving the gear dangling after a normal takeoff is a brake unit locked out. You give it around 2 minutes (precise time depends on type) for the wheel to spin down prior to retracting the gear.

Well if two posters independently think so, it must be true. :O

HEATHROW DIRECTOR

6th Nov 2017 20:57

<<that's what being fatigued can do to you.>>

And remember the ATC people.....

Faldo

11th Nov 2017 14:04

Brake application after T/O ?

Well I've been flying B747s since 1996 and I've never applied brake pressure to stop the wheels rotating after a take off. Never seen it as a written procedure in any Boeing flight manual either ?

Flying Fred

11th Nov 2017 20:30

Quote:

Originally Posted by Faldo (Post 9953884)

Well I've been flying B747s since 1996 and I've never applied brake pressure to stop the wheels rotating after a take off. Never seen it as a written procedure in any Boeing flight manual either ?

I never said the pilots apply the brakes. It's an automatic function on the 777 and A320, which are the types I know about.

On the 777, if a wheel brake is deactivated by having the brake line capped, the requirement is to leave the gear down for 2 min after takeoff. The reference is 777 DDG item 32-45-01B.

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