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Why does a reversal of a TCAS RA occur?
TCAS RA reversals also occur because the pilot of a TCAS-unequipped aircraft changes the flight path from a climb to a descent (with unknown intentions) or while relying solely on visual traffic avoidance.
When to display proximate traffic and intruders on TCAS?
THRT – If the TCAS selector is set to “threat” then proximate traffic and intruders will be displayed if there is a TA or RA, and they are within 2700 ft above or 2500 ft below the aircraft. ALL – Even with no TA or RA present, all traffic within 2700 ft above and below the aircraft will be displayed.
What do pilots need to know about AP / TCAs?
AP/TCAS equipped aircraft still have memory items that need to be completed to ensure the system responds correctly. The TCAS panel allows the pilots to select one of three TCAS modes. Standby Mode is the mode used on the ground during taxi and in this mode the surveillance and advisory functions of the TCAS are unavailable.
Is the TCAs still in stand-by mode?
TCAS remains in stand-by. The mode S transponder is fully operational. TCAS will operate normally and issue the appropriate interrogations and perform all tracking functions. However, TCAS will only issue traffic advisories (TA), and the resolution advisories (RA) will be inhibited. The mode S transponder is fully operational.
Which is the latest version of the TCAS system?
Traffic-alert and collision avoidance system (TCAS II) logic, currently at Version 7.1, automatically identifies a risk of midair collision and issues alerts for affected pilots. The system is known in some world regions as the airborne collision avoidance system (ACAS).
How is power applied to the TCAS processor?
Power is applied to the TCAS Processor and the mode S transponder, but TCAS does not issue any interrogations and the transponder will reply to only discrete interrogations. The mode S transponder is fully operational and will reply to all appropriate ground and TCAS interrogations. TCAS remains in stand-by.
Where are the TCAs antennas on an airplane?
Most installations use the optional directional antenna on the bottom of the aircraft. In addition to the two TCAS antennas, two antennas are also required for the Mode S transponder. One antenna is mounted on the top of the aircraft while the other is mounted on the bottom.