Incoming generated [May 14 2014]

0264-EX-PL-2014 Correspondence

Appareo Systems, LLC

2014-05-14ELS_149238

From: Vernon Miller

To: Anthony Serafini
Date: May 14, 2014

Subject:
----------------------------------------------------------------------------------------------------------------
Message:

In coordinating with the FAA Spectrum Engineering Services team, Mr. Peter Vu assigned Appareo
coordination number NG T140210.

Mr. Don Nellis added the below:

Make sure you emphasize that if there are any altitude replies sent (any
Mode C reply or Mode S transmission containing altitude), the altitude must
be set above 90,000 feet. They can not report "no altitude" because that
sets a reply of all zeros which is interpreted by TCAS as being
co-altitude. A co-altitude reply will cause TCAS equipped aircraft to
perform collision avoidance maneuvers.

Don Nellis

Document Created: 2014-05-14 14:42:49
Document Modified: 2014-05-14 14:42:49

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