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Thread: B-737 HDG SEL for trimming
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Old 10th August 2018 | 23:05
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Chesty Morgan
Gender Faculty Specialist
 
Joined: Mar 2002
: ATPL
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From: In your head.
The main reason to trim in HDG is because LNAV follows a track and, therefore, the heading will change with wind changes. You can’t then be sure that the reaction of the control column is due to you trimming or wind change.

In HDG this won’t happen.
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