Technical data

910 - 8 Page Date: 6. April 2010
Pilot´s Operating Handbook
EXTRA 300LT
Section 910
NAT AA83-001 Intercom
The relative volume of the music can be changed from the panel by the knob marked with a
musical note.
Below is a simple chart to aid in understanding audio switching in the NORMAL Operation mode.
The following terms are used:
Active Function being used
Muted Functions that are overridden by the active condition
Idle Functions that are not active, but still available for use
AUTOMATIC FAIL-SAFE
In the event of a power failure, automatic fail-safe operation will be activated. It can also be
enabled by pulling the AA83-001 circuit breaker. Fail-safe mode routes the pilot’s phones, mic
audio, and mic PTT directly to the COM radio.
During transmit mode, the pilot mic is directly connected to the transceiver mic. Mic bias is
provided by the transceiver, not the AA83-001. The pilot TX keyline is directly connected to the
transceiver. The sidetone audio is directly connected from the audio source to the pilot phones.
During receive mode, receive audio is directly connected from the audio source to the pilot
phones.
In both modes, The copilot has no ICS, music, sideline, or receive functions.
N O T E
In Automatic Fail-safe mode, the receive/sidetone levels may require adjustment at the
audio source.
The pilot should confirm that all aspects of Automatic Fail-safe operation are working
before accepting the aircraft into service.