Communications

Question 1

Q.4.1. What would be the indication that the Radio Tuning Panel had failed?

Answer 1

PANEL would be displayed in the active frequency window and FAIL would be displayed in the standby frequency window.

Reference: FRM 5.1.1.1

Question 2

Q.4.2. On aircraft with a Radio Tuning Panel installed, what would be the indication if the selected radio had failed?

Answer 2

FAIL would be displayed in both the active and standby frequency window.

Reference: FRM 5.1.1.1

Question 3

Q.4.3. The three flight deck Audio Control Panels have an NORM/ALT position, what radios are useable in each position with the switch in ALT (Degraded Audio System Operation)?

Answer 3

CA
VHF-1

FO
VHF-2

Observer
VHF-1

Reference: FRM B737NG 5.2.7, FRM B737MAX 5.2.6

Question 4

Q.4.4. What effect does operating in ALT have on the Audio Control Panels (ACP) volume control?

Answer 4

Volume cannot be adjusted and only the usable radio is heard at a preset volume through the headset.

Reference: FRM B737NG 5.2.7, FRM B737MAX 5.2.6

Question 5

Q.4.5. What effect does operating Audio Control Panels (ACP) in ALT have on the associated overhead speaker?

Answer 5

The speaker and speaker switch are not functional at that station.

Reference: FRM B737NG 5.2.7, FRM B737MAX 5.2.6

Question 6

Q.4.6. If operating the Audio Control Panels (ACP) in ALT, can you still use the Flight and Service Interphone?

Answer 6

No.

Reference: FRM B737NG 5.2.7, FRM B737MAX 5.2.6

Question 7

Q.4.7. If operating the Audio Control Panels (ACP) in ALT, how are audio warnings affected?

Answer 7

Audio warnings for altitude alert, GPWS, and wind shear are not heard on an audio system operating in the degraded mode.

Reference: FRM B737NG 5.2.7, FRM B737MAX 5.2.6

Question 8

Q.4.8. Which models have a stuck microphone alarm?

Answer 8

737-800 and MAX

Reference: FRM B737NG 5.2.5, FRM B737MAX 5.1.2

Question 9

Q.4.9. How does the stuck microphone alarm work?

Answer 9

A timer limits VHF transmission to approximately 35 seconds. Approximately 25 to 30 seconds after any PTT is selected, the transceiver makes an aural tone (or side-tone) in the headset. This tone continues for approximately five seconds. When the tone stops, the RF transmission also stops, and the radio is set to receive mode automatically. The radio remains in receive mode until the PTT is released and selected again.

Reference: FRM B737NG 5.2.5, (opens in a new tab)FRM B737MAX 5.1.2

Question 10

Q.4.10. What effect does the PTT switch or MASK-BOOM switch have on the flight deck hand microphones?

Answer 10

None, the MASK-BOOM and/or PTT switches does not affect the operation of the hand microphones.

Reference: FRM 5.2.4

Question 11

Q.4.11. When using the PTT switch are the overhead speakers muted?

Answer 11

Yes, the two flight compartment speakers are muted for the Captain’s and First Officer’s push-to-talk microphone operation.

Reference: FRM 5.2.3

Question 12

Q.4.12. When using the mask microphone are the overhead speakers muted?

Answer 12

No, the speakers are not muted for oxygen mask microphone operation.

Reference: FRM 5.2.3

Question 13

Q.4.13. When STAT MD services are needed what VHF radio should the crew establish communication on?

Answer 13

VHF #2

Reference: FRM B737NG 5.2.12, B737MAX 5.2.13, AOM 16.5.5.1

Question 14

Q.4.14. Which audio control panel is used to allow the Flight Attendant’s to communicate with STAT MD?

Answer 14

Observer’s ACP.

Reference: FRM B737NG 5.2.12, B737MAX 5.2.13, AOM 16.5.5.1, 16.5.5.2

Question 15

Q.4.15. What should be the only selection on the ACP?

Answer 15

STAT MD with VHF
VHF #2, adjust to full volume for best communication

STAT MD with SATCOM
SAT #1 or SAT #2, ensure the volume level for the selected transmitter is turned up to a suitable level so that the Flight Attendant is able to hear the transmission.

Both
Deselect all other audio sources on the Flight Deck Jumpseat Observer’s ACP.

Note: The Flight Deck Crew should not use the ‘hot mic’/FLT interphone transmission feature during STAT MD procedures. “Hot mic” transmissions are audible to STAT MD personnel and Flight Attendants, which may cause confusion.

Reference: FRM B737NG 5.2.12, B737MAX 5.2.13, AOM 16.5.5.1, 16.5.5.2

Question 16

Q.4.16. When is the area microphone active on the Cockpit Voice Recorder?

Answer 16

Active anytime 115V AC is applied to aircraft.

Reference: FRM B737NG 5.1.8, B737MAX 5.1.11

Question 17

Q.4.17. What is the expectation when the flight attendants ring the flight deck 4 times over the Crew Call System?

Answer 17

There is an emergency in the cabin that requires immediate communication, via the service interphone, with the flight deck.

Reference: FOM 16.9.1

Question 18

Q.4.18. What are some of the allowable exceptions to the requirement for Ramp Personnel to utilize headset?

Answer 18

The aircraft’s communication panel is out of service (deferred).

The ramp is under yellow alert for lightning within eight miles of the airport .

The station does not have headset capability.

All available headsets are out of service.

Reference: FOM 16.10.1