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Old 24th March 2016 | 06:15
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mmrassi
 
Joined: Mar 2007
Posts: 79
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From: FL410
B737NG LAND 3 Sources
Hello Everyone,

In description regarding LAND3 in FCOM, It states that 2 A/P and 3 inertial sources are operating normally.

Can someone tell me what are these three "Inertial Sources" ?
And does "Land 2" mean that the failuer happened in one of those 3 inertial sources or it may also include A/Ps?

Thanks
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