Kazan Helicopters Mi-17-1V Flight Manual page 183

M,,·17·1B. Flight manual
(APK-15) and VHF-UHF ADF there is a MF ADF - VHF ADF selector
switch, located on the left instrument panel.
(1a) Set the MF ADF - VHF ADF selector switch to MF ADF position (for heli-
copters which are not equipped with 6Cyn·2K indicator of the VHF-UHF
ADF)
(2) Set the ADF control panel mode selector switch to ANTENNA (AHT).
(3) Set the interphone control box communication channel selector switch to
ADF 1 (PK-1), set the ICS -RADIO selector switch to RADIO position.
(4) Set the channel selector switch to position 1, using the 1
st
channel band
selector switch set the omnirange station operation frequency and listen
to its call sign (it should be heard clearly).
(5) Adjust the volume of received signals by operating the volume controls
on the ADF control panel and the interphone control box.
(6) Set the ADF control panel mode selector switch to COMPASS (KOM)
and check the displayed radio station relative bearing for correctness.
(7) Functionally check the VOICE-CW (Tn<p-Tnr) selector switch by occur-
rence of an audio frequency buzzing in the headphones in the CoW mode
and its discontinuation in the VOICE (Tn<p) mode.
(8) Press the LOOP (PAM) button and move the KYP nHn-72-15 indicator
pointer by an angle of 90° ... 120° from the initial position. Release the
button: the KYP indicator pointer should return to the initial position. Set
the ADF to channel 2 position.
Note: It is necessary to take into account that the aural bearing value
will be two-valued with a shift of 180°.
7.2.7. APK-YA VHF-UHF Automatic Direction Finder
Use the APK-YA UHF VHF ADF proceed as follows:
(1) Switch on the VHF ADF (PAAVlOKOMnAC YKB) and INT (CnY) circuit
breakers located on the overhead electrical control panel.
(1a) Set the MF ADF -VHF ADF switch to VHF ADF position (for the helicop-
ters, which are not equipped with 6CYn-2K indicator of the VHF-UHF
ADF).
(2) Set the interphone control box communication channel selector switch to
ADF 2 (PK 2) and the ICS-RADIO (CnY-PAAVlO) selector switch to
RADIO (PAAVlO).
(3) Set the mode selector switch on the control panel to BB (Illfl), the fre-
quency range selector switch to USW (YKB) and the CHANNELS
(KAHAnbl) selector switch to 4, and the receiver own noise should be
heard in the earphones.
(4) Depress the TEST (KOHTP) button and keep it depressed until the ADF
indicator pointer sets to 180°
±
13°. As it takes place, the NB (Yl'l) and
BB (nW) indicating lights should illuminate and the audio frequency sig-
nalshollid be heard in the headphones.
(5) Depress the LOOP L (AHT. rt) or LOOP R (AHT. n) button and, holding
the TEST (KOHTP) button depressed, set the ADF indicator pointer to
30° (or 330°), release the L
(Jl) or R (n) button, and the pointer should re-
turn to 180°
± 13°.
(6) Perform a similar test with the mode selector switch set to NB (Yn) position
(the NB (Yn) light should come on) and then to PULSE (Vl) position (the Vl
and possibly yn lights should come on). With the mode selector switch set to
PULSE (Vl), an audio signal of reduced frequency should be heard in the
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