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757 Captain >> 757 version 4.x (FSX ONLY) >> 757-200 FMC Tutorial
https://www.captainsim.org/forum/csf.pl?num=1220997876

Message started by aussie on Sep 10th, 2008 at 7:32am

Title: Re: 757-200 FMC Tutorial
Post by vector on Sep 16th, 2009 at 9:39pm

swivelhi wrote on Aug 23rd, 2009 at 10:22am:
Aussie, What am I doing wrong?

...

I click Align in all 3 columns and wait till the light in each goes out, then I switch to NAV in all 3. Then the 3 Align start flashing, is that normal. When in flight while I'm straigt and level and at cruising speed I try to switch on Alt/Hold and Heading/Hold and they don't work, the plane usually goes into a bank and then dive?


Your IRS isn't aligned. The flashing "ALIGN" lamps indicate a fault.

Try this:

1) APU = ON ; Engines = OFF
2) Set IRS from "OFF" to "ALIGN" (all 3 columns). Wait for it to set.
3) Go to CDU/FMC. Choose "POS INIT". Copy your last known LAT/LONG to the scratch pad by hitting the button on the TOP RIGHT and then paste that in where it says something like "SET IRS POS"
4) Now - switch IRS from "ALIGN" to "NAV"

You should no longer get the flashing ALIGN lights. Now it should be set!

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