A-8131; Radar Set Purpose And Its Components; Radar Operational Test - Kazan Helicopters Mi-17-1V Flight Manual

MI'I·17·1B. Flight manual
7.10. A-8131..\ Weather Radar.
7.10.1. Radar set purpose and its components.
(1) The A-8131..\ radar set (KONTUR 10) is a third class weather radar, de-
signed to solve the following tasks:
- radar detection of zones of both thunderstorm formation activities and
turbulent cloud cover, with the estimation of degree of weather haz-
ard;
- scanning over the earth surface, providing a possibility navigational ori-
entation with reference to prominent land (over-sea) marks (ob-
jects).
(2) The radar set includes an antenna, transceiver provided with a
waveguide transmission line, and a display.
(3) The Captain's and Navigator's work stations are equipped with all neces-
sary to energize the radar, to prepare it for operation in flight, as well as
to check it for serviceability and to operate it in flight.
7.10.2. Radar operational test.
(1) The radar operational test is performed with built-in test system on the
ground as well as in flight in case of radar malfunction.
Note: It is prohibited to use any radar operating mode, while ground test-
ing as well as while taking off until the helicopter taxies out to the
runway.
On the ground the radar must be checked only in TEST mode to avoid the ra-
diation into the environment.
(2) To switch on the radar proceed as follows:
- switch on the RADAR circuit breaker, located on the right ACB panel of
the cockpit.
- press the ON button, located on the display front panel.
After that, the LED, located on the right side from the display screen,
lights up and the radar is automatically set to TEST mode with 20 km
scale.
(3) After the test picture has been displayed, make sure that it is identical to
the reference one, Fig. 7.1. If the pictures are completely identical, it
means that the radar is serviceable. If the test picture differs from the
reference one, detect the failed unit using the Table 7.1.
Note: If after 3 minutes the test picture is not displayed, use the
BRIGHTNESS control to display it.
Table 71
NQ Test picturedistortion Failedunit
1.
There is no transceivertest sianal rings or they are less than 3 Transceiver
2.
There is no one or several disolavtest sianal rinas Disolav
3.
There is no scannina line or NO SCANNING is disolaved Antenna
4.
Curvature of the oicturefield Disolav
(3) De-energize the radar: press the ON button again and switch off the
RADAR circuit breaker.
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