FORT WORTH, TX.
November 2004 – HTA recently completed the
Traffic Alert and Collision Avoidance System (TCAS) upgrade
to Version 7 (7.0 software from 6.04 software), IAW Collins
STC ST00881W1-D modification of the TCAS II system, and
Collins Service Information Letter, SIL 1125-34-108.
The objectives of the version 7 is to increase the safety
benefits of TCAS, make it more compatible with procedures
used by Air Traffic Control (ATC) and address operational
concerns by pilots’ operating systems with the 6.04 versions
of TCAS in Reduced Vertical Separation Minimums Airspace.
TCAS version 7 retains the visual and audio annunciations
but has been modified to make the pilot’s response to a
Resolution Advisory (RA) more intuitive. The Horizontal Miss
Distance Filter will recognize encounters with adequate
horizontal separation between aircraft and whenever possible
suppress a Resolution Advisory which should result in a
reduction of RA’s in the US Airspace by 25% and 40% in
European Airspace. TCAS version 7 also allows an RA reversal
such as changing “Climb” to “Descend” in a coordinated
encounter with another TCAS aircraft.
The Intruder Surveillance has been improved resulting in
aircraft being more reliably displayed and tracked at longer
ranges in high-density traffic areas. RVSM compatibility has
Traffic Advisories (TA’s) thresholds between FL 300 and FL
420 reduced to eliminate nuisance “TA’s” while operating in
RVSM airspace. The aural warning inhibit altitude has been
reduced to 500 feet Above Ground Level (AGL) to increase the
awareness of TA’s issued while on approach. A reduction in
“Bump Up” encounters at altitudes of 10,000 to 30,000 where
an aircraft is climbing or descending to an altitude 1000
feet above or below the TCAS aircraft has been slightly
delayed in the issuance of an RA reducing the number of
unwarranted RA’s. The altitude crossing warning system has
been biased to also reduce the number of RA’s when in RVSM
HTA Aviation, LLC, a privately held company, providing
superior CLS and COMBS services for our government and
support for the world's most technologically advanced
business jet aircraft. HTA also offers Service Engineering (DER
& PMA), Technical Publications, and Consulting Services for
the business aviation industry.