Questo e' quello che leggo sul mio FCOM3.
RA are inhibited:
- below 900 feet
- if the windshear message is triggered
- if the stall message is triggered
- GPWS messages are triggered
Select TA only mode in the following cases :
-Engine failure
-Dispatch with landing gear down (if applicable)
-In case of known nearby traffic which is in visual contact.
-At particular airports and during particular procedures identified by an
operator as having a significant potential for unwanted a inappropriate RAs
(closely spaced parallel runways, converging runways, low terrain along the
final approach...)
Par31