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I'm Wondering About An Alarm On The RJ.  
User currently offlineAircanada333 From Canada, joined Jun 2005, 471 posts, RR: 1
Posted (8 years 8 months 4 days 10 hours ago) and read 3181 times:

EFIS COMP MON. It appears very often when in the middle of a tow move. What does it mean?


De-icing RULZ!!!
4 replies: All unread, jump to last
User currently offlineDashTrash From United States of America, joined Aug 2006, 1646 posts, RR: 2
Reply 1, posted (8 years 8 months 4 days 6 hours ago) and read 3159 times:

It's a comparator warning. It means that either the ADIs or HSIs do not agree with each other. (Displaying different attitude or heading information).

User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 10
Reply 2, posted (8 years 8 months 4 days ago) and read 3105 times:

If we're talking about CRJ's the planes have Collins AHRS and it's extremely sensitive to magnetic disturbances like those caused by a tow vehicle.
6 degrees difference between the two systems gets you a warning.

One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
User currently offlineAvt007 From Canada, joined Jul 2000, 2132 posts, RR: 4
Reply 3, posted (8 years 8 months 3 days 17 hours ago) and read 3014 times:

AC Jazz aircraft are going to an all IRS fleet. The AHRS are a pain, and so is the Litton IRS, so they will have a Honeywell Laseref V in every CRJ, whether 100, 200, or 705. AC333, spefically it means EFIS comparison monitor, meaning that a parameter on the two EFIS displays do not agree. It will be accompanied by an amber box annunciator on the PFDs, next to the parameter that is causing the message. Probably heading, as the two fine gentlemen suggested.

User currently offlineAircanada333 From Canada, joined Jun 2005, 471 posts, RR: 1
Reply 4, posted (8 years 8 months 3 days 12 hours ago) and read 2964 times:

Thanks guys for the quick answers!

De-icing RULZ!!!
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