Honeywell International Inc. 9PGTPA-100A Manuale Utente
Page 2051
1 Dec 2003
34-45-4
7
MAINTENANCE MANUAL
CAS-100 COLLISION AVOIDANCE SYSTEM
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
(6) Antenna Test
Some of the antenna BITE tests are only performed when the aircraft is airborne. To start
these tests, exercise the Air/Ground Strut switch or the Landing Gear
Retracted/Extended switch in a way to make TCAS think that own aircraft is airborne.
Allow the equipment to operate for approximately 20 minutes. This will let the BITE
circuits record results of antenna tests in Flight Fault Memory.
these tests, exercise the Air/Ground Strut switch or the Landing Gear
Retracted/Extended switch in a way to make TCAS think that own aircraft is airborne.
Allow the equipment to operate for approximately 20 minutes. This will let the BITE
circuits record results of antenna tests in Flight Fault Memory.
(7) ARINC 429 Installation Checkout Data Words
The TCAS Processor sends Installation Checkout ARINC 429 data words (Labels 360,
361, 362, 363, 364, and 365) to the maintenance computer. These words reflect the state
of a program pin or input discrete pin. Reviewing the contents of these data words after
a TCAS system installation is complete provides a means of checking and debugging the
installation. The format of these words is given in TPA-100A TCAS Processor
Component Maintenance Manual 012-0739-001.
361, 362, 363, 364, and 365) to the maintenance computer. These words reflect the state
of a program pin or input discrete pin. Reviewing the contents of these data words after
a TCAS system installation is complete provides a means of checking and debugging the
installation. The format of these words is given in TPA-100A TCAS Processor
Component Maintenance Manual 012-0739-001.
In Table 2007:
• If the input pin is a program pin and it is tied to the program pin common, the
associated bit in Table 2007 will be set to 1, if it is not tied to the program pin it will
be set to 0.
be set to 0.
• If the input pin is a discrete and has 100,000 ohms or more of resistance from this
pin to airframe dc ground, or a voltage between +18.5 and +36 V dc, the associated
bit in Table 2007 will be set to 0. If the input pin has a resistance of 10 ohms or less
from the pin to aircraft ground, or a voltage of +3.5 V dc, the associated bit will be set
to 1.
bit in Table 2007 will be set to 0. If the input pin has a resistance of 10 ohms or less
from the pin to aircraft ground, or a voltage of +3.5 V dc, the associated bit will be set
to 1.
• All bits not associated with discrete or program pins will be set to 0. ARINC Data
Word Label 364 contains Reserved Discretes 01 - 17 and is not listed in Table 2007.