Speaker (SPKR) Switch YA626, YA721 - YK104
Illuminated (white) – SPKR switch is active.
Push – audio from selected receiver is heard on overhead speaker.
Rotate – adjusts overhead speaker volume.
Push again – deselects audio from selected receiver to be heard on overhead
speaker.
Copyright . The Boeing Company. See title page for details.
Communications -Controls and Indicators 737 Flight Crew Operations Manual
Filter Switch
V (Voice) – receive NAV and ADF voice audio.
B (Both) – receive NAV and ADF voice and range audio.
R (Range) – receive NAV and ADF station identifier range (code) audio.
CALL Light
Illuminated (white) – Accompanied by a chime, indicates call received by SELCAL, ACARS (if installed), ground crew (INT), SATCOM (if installed), or flight crew (CABIN).
Resets when transmitter is selected and microphone is keyed. PA does not have a CALL indication.
Alternate–Normal (ALT–NORM) Switch YA626, YA721 - YK104
NORM (Normal) – ACP operates normally.
ALT (Alternate) – ACP operates in degraded mode.
Ground Crew Call Light YA686, YA687
Illuminated -Indicates call to flight deck initiated by ground crew with Pilot Call Switch at external power receptacle. Light will extinguish when ground crew releases switch. Accompanied by single high tone chime.
Speaker (SPKR) Switch
Illuminated (white) – SPKR switch is active.
Push – audio from selected receiver is heard on overhead speaker.
Rotate – adjusts overhead speaker volume.
Push again – deselects audio from selected receiver to be heard on overhead
speaker.
Filter Switch YA626, YA721 - YK104
V (Voice) – receive NAV and ADF voice audio.
Copyright . The Boeing Company. See title page for details.
5.10.16 September 29, 2005
Communications -Controls and Indicators 737 Flight Crew Operations Manual
B (Both) – receive NAV and ADF voice and range audio.
R (Range) – receive NAV and ADF station identifier range (code) audio.
Cabin Call Light YA686, YA687
Illuminated – Indicates call to flight deck by attendant. Accompanied by single high tone chime.
Alternate-Normal (ALT-NORM) Switch
NORM (Normal) – ACP operates normally.
ALT (Alternate) – ACP operates in degraded mode.
Speaker (SPKR) Switch YA686, YA687
Illuminated (white) – SPKR switch is active.
Push – audio from selected receiver is heard on overhead speaker.
Rotate – adjusts overhead speaker volume.
Push again – deselects audio from selected receiver to be heard on overhead
speaker.
Alternate–Normal (ALT–NORM) Switch YA686, YA687
NORM (Normal) – ACP operates normally.
ALT (Alternate) – ACP operates in degraded mode.
Copyright . The Boeing Company. See title page for details.
Communications -Controls and Indicators 737 Flight Crew Operations Manual
SELCAL Panel YA626, YA721 - YK104
YA809, YC411 - YK104
YA626
YA721 - YA803, YC153, YC154
SELCAL Light
Illuminated (white) - alerts crew to incoming communication on indicated radio.
Reset Switch
Push - extinguishes and resets SELCAL light.
Copyright . The Boeing Company. See title page for details.
5.10.18 June 1, 2005
Communications -Controls and Indicators 737 Flight Crew Operations Manual
ACARS Printer YA721 - YK104
YA721 - YA809, YC411 - YK104
Slew Switch
Push -advances paper as long as switch is depressed.
Reset Switch
Push - resets message light.
Test Switch
Push -
.
produces character test pattern
.
illuminates MSG and FAIL lights.
Copyright . The Boeing Company. See title page for details.
PAPER ADVANCE (PPR ADV) Switch
Push – advance paper while switch is held.
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5.10.20 June 1, 2005
Communications -Controls and Indicators 737 Flight Crew Operations Manual
LOW PAPER (PPR) Light
Illuminated (white) - printer paper is low.
TEST Switch (momentary action)
Push –
.
printer performs a self test
.
test pattern is printed.
TEST Light
Illuminated (white) - a printer fault exists.
ALERT RESET (ALRT RST) Switch (momentary action)
Push – resets aural/visual printer alert functions.
FAULT (FLT) Light
Illuminated (white) –
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