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Old 20th July 2006 | 10:58
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FRying
 
Joined: Jul 2004
Posts: 173
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From: my cockpit
B737 EFIS "Speed Off"

I have had the chance to fly 737s EFIS for various airlines and one specific difference in SOPs is about pressing the MCP "Speed" button off on final in order to bring the A/T in an "ARM" status mode. Some people pretend you have to be out of your mind to act so and others say you have to be out of your mind not to act so...Very disturbing. Some people simply cut the A/T out as soon as they've returned to the Manual mode.

I find arming the A/T vs keeping the A/T on (MCP SPD mode) on final very comfortable and still safe because you still have a chance to have the A/T recovering a situation when the speed would fall below the set MCP speed. And I find this technique safer and more comfortable than keeping the "full" A/T on as you don't have to fight the moving A/T.

I have tried and find documentation regarding this topic and could not retrieve anything relevant. Anyone could feed me with more info such as Boeing recommendations or other official docs ? Thanks.
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