A Complete Manual for Conducting International Flight Operations
Altimetry Check
Altimetry Check
1. Altimetry Check- Conducting hourly altimetry checks is not only recommended in AC 91-70, it is also important from a practical standpoint. If you have ever experienced an altimetry miscompare in a modern aircraft you know that the things will get very busy very quickly. Not only are you not able to operate in RVSM airspace if the altimetry system differs by more than 200 feet, but you may also be faced with an aircraft that is experiencing pressurization issues due to an ADC failure, transponder issues due to the same ADC failure
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