NAVIGATION AND COMMUNICATION

Question 1

Can COM 3 be used for voice communication when the emergency button (EMER) is pushed in (selected) on the digital audio panel?

Answer 1

No.

Reference: OM Vol. 2, Section 2-18

Question 2

What does the emergency button (EMER) on the digital audio panel do?

Answer 2

The Captain is connected directly to COM 1 and NAV 1 and the First Officer is connected directly to COM 2 and NAV 2. Observer radio communication capability is lost. Interphone is disabled.
Reference: OM Vol. 2, Section 2-18

Question 3

Will the tuning backup control head (TBCH) remain powered in essential power?

Answer 3

No, it is powered by DC Bus 2.

Reference: OM Vol. 2, Section 2-5 & 2-18

Question 4

How can the radar be brought out of FSBY on the ground?

Answer 4

The forced standby mode may be overridden on the ground by pushing the STAB button 4 times in 3 seconds.
Reference: OM Vol. 2, Section 2-18, Forced Standby Mode (FSBY)

Question 5

What is the function of the GAIN knob?

Answer 5

The GAIN knob can be used to vary the sensitivity of the receiver. This will also result in a variance of color intensity displayed for a radar return.
Reference: OM Vol. 2, Section 2-18, Receiver Gain

Question 6

What mode can be used to display areas where all radar energy has been attenuated?

Answer 6

The REACT, or rain echo attenuation compensation technique mode. Reference: OM Vol. 2, Section 2-18, Rain Echo Attenuation Compensation Technique

Question 7

Where does the standby airspeed indicator receive its pitot/static information from

Answer 7

Pitot/Static 3 provides dynamic pressure to the standby airspeed indicator. Reference: OM Vol. 2, Section 2-17, Navigation and Communication