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Old 9th November 2009 | 21:49
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Jelly Doughnut
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747-400 EICAS maintenance page - Aircon system

Anybody more technically minded than myself able to answer this question?!

On the EICAS maintenance page for the Air Con system, individual valve positions for the trim air valves are displayed. If a valve was locked mechanically into eg. 25% open position (as per certain MEL requirements) would this show up on the EICAS?

In other words, where does the EICAS valve position take its input from, electronic signal or physical (mechanical) position?

rgds
JD
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