PPRuNe Forums - View Single Post - B737 No Uptrim during Cat III
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Old 17th Jan 2005, 09:42
  #31 (permalink)  
Alaskan Timber
 
Join Date: Dec 2004
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Hey error 401,

The credit thing was not meant for you.

I agree a lot of failures during a CAT III require a go-around and if unsure about something 99.9% I would make a go-around (the .1% is a double flame out).

My books are 200 NM seperated from me, so I cannot check it. The questions stays : Is the 400ft trim a requirement or not ? Does the aircraft always trim at 400ft whatever the IN TRIM or OUT OF TRIM (no STAB OUT OF TRIM light) situation is ? Or can it anticipate on this ?

What I know is that the 400ft uptrim is a preparation for the flare. If you notice that on the FMA the FLARE doesn't engage (green) then in a normal situation you are allowed to land manually. After A/P disconnect the aircraft is already in the postion to land (due to the trim at 400ft). It is even mentioned not to pull the stick anymore as you might start ballooning.

A.T.

Hey BOAC,

Our posts crossed each other. I understood from LEM's post that he didn't get a STAB OUT OF TRIM warning. Otherwise it is 100% a go-around.

Last edited by Alaskan Timber; 17th Jan 2005 at 10:23.
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