(2)
 Pilot emergency function In case of a failure on the Audio Board A, the pilot's microphones and audio signals are switched through relays in parallel to the 3rd occupant's microphone inputs and audio outputs. The PTT commands from the pilot's microphones are active. The pilot's ACP is no longer active.

 (3)
 Copilot In case of a failure on the Audio Board B, the copilot's microphones and audio signals are switched through relays to the Avionics Bay microphone inputs and audio outputs, which are no longer active. The PTT commands from the copilot's microphones are active. The copilot's ACP is no longer active. In addition, the 3rd occupant's micro and audio signals are switched in parallelto the Avionics Bay micro and audio signals, and the 3rd ACP ARINC bus is switched to the AVIONICS bAY acp arinc input/output. The Avionics Bay ACP ARINC line is cut.

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 Emergency Function - Microphone/Reception
 Figure 026A

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 D. FAA/CAA Recording Function
 (1) Reason The Aeronautics Authorities for Federal Navigation request that the communications made onboard the aircraft are recorded on the CVR system (Cockpit Voice Recorder - REF ATA 23-71-RK). To meet this requirement, the CVR is equipped with 4 recording tracks:
 -3 tracks for recording the Captain, First Officer, 3rd Occupant communications
 -The 4th track is assigned to an area microphone installed in the cockpit. This microphone picks up the various noises made in the cockpit.
 The Captain, First Officer and 3rd Occupant communications are recorded in accordance with the requirements laid down by the FAA (Federal Aviation Authority) and the CAA (Civil Aviation Authorities).
 (2)
 CAA recording (Ref. Fig. 027) All the communications heard by the Captain (or the First Officer or the 3rd Occupant) are recorded. This enables, at the same time, to record all the communications sent out by these crew members. This is achieved by means of the side-tone controls on the various equipment. Three windings equip the secondary of the output transformer of the reception channel: 2 are allocated to the loud speaker and boomset outputs. The third is reserved for recording the communications heard in the cockpit (CVR). The CAA recording principle requires that the noises picked up by the boomset microphones be recorded even when these microphones are not active i.e. when the push-to-talk switches on the side-sticks or on the ACPs are not activated. This in order to reinforce the sounds picked-up by the area microphone. A shunt is installed on the pin-programming terminal of the AMU to activate the CAA recording (Ref. Para. Operation - Pin Program).

 (3)
 FAA recording (Ref. Fig. 028) All the communications heard by the Captain (or the First Officer or the 3rd Occupant) are recorded. This enables, at the same time, to record all the communications sent out by these crew members. This is achieved by means of the side-tone controls on the various equipment.

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 CAA Certification - Block Diagram
 Figure 027

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 Communications - CVR Circuit
 Figure 027A

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 FAA Certification - Block Diagram
 Figure 028

R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 23-51-00Page 76 1201-220, 1May 01/05 1 1 1CES 1 Three windings equip the secondary of the output transformer of the reception channel: 2 are allocated to the loud speaker and boomset outputs. The third is reserved for recording the communications heard in the cockpit (CVR).

 (4) Not Applicable

R **ON A/C 106-149, 221-299, 301-399, 401-499,
 D. FAA/CAA Recording Function
 (Ref. Fig. 027A)

 (1) Reason The Aeronautics Authorities for Federal Navigation request that the communications made onboard the aircraft are recorded on the CVR system (Cockpit Voice Recorder - REF ATA 23-71-RK). To meet this requirement, the CVR is equipped with 4 recording tracks:
 -3 tracks for recording the Captain, First Officer, 3rd Occupant communications
 -The 4th track is assigned to an area microphone installed in the cockpit. This microphone picks up the various noises made in the cockpit.
 The Captain, First Officer and 3rd Occupant communications are recorded in accordance with the requirements laid down by the FAA (Federal Aviation Authority) and the CAA (Civil Aviation Authorities).
　
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