PPRuNe Forums - A320 QNH limitation

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tomashku

20th Jan 2010 08:23

A320 QNH limitation

Yesterday in UACC local QNH was 1053 hpa neither the FCU nor MCDU allowed for this input. I checked other planes (320s) and some of them have the MCDU limited to 1050 but FCU can go much higher. What does it mean? Is there any QNH limit for A320 or any other plane or Air Data Computers?

ab33t

20th Jan 2010 10:37

Yes there are restricions on high pressure

tomashku

20th Jan 2010 12:30

QNH

What are this limits? Where can you find more information?

Right Way Up

20th Jan 2010 12:32

try FCOM 2.4.65 "OPERATIONS AT QNH ABOVE 1050 hPa"

IflyA320

20th Jan 2010 15:34

Standard range of QNH is 950 to 1050.

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