B737 NG & EEC hard modes

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13th July 2008 | 16:47

#1 (permalink)

parkfell

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de minimus non curat lex

Joined: Feb 2001

Posts: 1,510

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From: sunny troon

B737 NG & EEC hard modes

Why is it that when a failure of an EEC occurs, and both are now placed in the hard mode, this new mode results in a slight increase in V1 speeds? QRH refers.

13th July 2008 | 22:14

#2 (permalink)

Kempus

Joined: Jan 2002

Posts: 465

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From: UAE

Cant remember exactly, but I'm sure its because the engines are flat rated and is so to compensate for enviromental conditions. ie power drop due to pressure and temp!

If wrong let me know!

cheers!

14th July 2008 | 07:40

#3 (permalink)

Ollie268

Joined: Aug 2003

Posts: 32

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From: Temporarily Uncertain...

No, i think it is because the EECs no longer compensate for environmental conditions and so go on what stored data they have which usually gives you an increase in speeds.

14th July 2008 | 08:30

#4 (permalink)

vopz

Joined: Feb 2005

Posts: 23

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From: algeria

when the EEC is placed in the hard mode, this new mode will take a 30 c as a default temperature .as you know when the temperature increases v1 speed increases as well.