MAP integrity check
Hi,
ive seen that some airlines are performing a map integrity check prior to comencing their descent. How does this check work? Cheers, |
Dial up a vor/dme.
Compare radial/distance from the raw data with an FMC generated position via the fix page (Boeing) or the PROG page (Airbus). If result is > 2nm the position is unreliable, inhibit GPWS (if it doesn't have independent GPS) and fly the aircraft using raw data. |
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