B737NG LAND 3 Sources
Thread Starter
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
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
Joined: Aug 2009
Aviation Qualifications: ATPL
Posts: 616
Likes: 57
From: GPS L INVALID
The third inertial source is the ISFD. The other two are the IRSs. LAND 2 could mean an inertial source (interface) failure, an autopilot failure though would give you a NO AUTOLAND.
