Ravintola
28th Aug 2003, 16:20
Hello,
I've seen several TCAS/Transponder control panels with a 3-position switch marked A-N-B (N is the center postion). The maintenance manual says this switch is for "Above-Normal-Below" but that's it!
Anyone know what it is for?:confused:
Capt Pit Bull
28th Aug 2003, 16:37
Its TCAS display volume for 'Other Traffic' blips.
Typical values would be.
N for Normal values are +/- 2,700 feet.
A for Above would display -2,700 to + 9,900'.
B for Below would display -9,900 to +2,700'.
The precise values are equipment specific. I've seen 8,000' as the deeper limit.
Crucial Points:
1. This is DISPLAY volume only, and has no bearing on TCAS tracking / collision avoidance.
2. It only affects OTHER TRAFFIC blips. Proximate Traffic, Traffic Advisory and Resolution Advisory blips are always shown, regardless of display volume selection.
CPB
used2flyboeing
4th Sep 2003, 21:43
Anyone know how AIRBUS displays their TCAS II resolution advisories ( RAs- FCOM lingo) on the EADI ? IE are the indications on the Pitch Scale OR are they still using the V/S warnings-colored - sty of of this V/S region hashes?