Garrecht Avionik GmbH
VT-01 Transponder
Installation Manual - english -
Document:
01.0200.11E
Revision: 1.3
40
10.3. Flight test procedures
10.3.1. General
This guidance material offers examples of flight test procedures for demonstrating selected
performance functions. Flight demonstration of installed performance may be required to determine
the performance and characteristics of the installed antenna.
If the aircraft has been equipped with a transponder before, the flight test after installing the VT-02
might be obsolete, if the following conditions are fulfilled:
•
The rated RF output power of the old device was less or equal to the RF output power of the
VT-02
•
The antenna used for the VT-02 is the same as used before (NOTE: Replacing the old
antenna by a new antenna of the same type is also sufficient to fulfil this requirement.
•
If a new antenna line need to be installed, be sure, that the maximum loss of the new line
does not exceed the loss of the old antenna line.
10.3.2. Flight tests instructions
For determining performance in flight, all tests on ground as shown in 10.1. need to be performed
successfully.
Arrange a schedule with the area air traffic control facility so that a controller is available to observe
the transponder reply and communicate with the test aircraft to confirm performance of the
transponder.
a. Select a test area such that line-of-sight signal propagation is ensured (distance: 60 nm to
selected ATC facilityx).
b. So that ATC can confirm valid returns through normal flight attitudes, test manoeuvres may
include standard rate turns through 360 degrees, climbs and descents.
c. Verification of Mode A codes selected, and reported altitude responses to Mode C should
also be checked.
d. Verify if ATC confirms valid replies with gear down (if applicable) and flaps set to landing
configuration
e. Verify, if interference with other electronic equipment installed in the aircraft occurs during
the flight.
For detailed information regarding flight tests refer to document FAA AC 23-8B, Chapter 5.
