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Thread: B737NG LAND 3 Sources
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Old 24th March 2016 | 07:39
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STBYRUD
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: ATPL
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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.
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