Operation
Becker Avionics
Emergency Operation
60
ACU6100
DV64440.03 Issue 09 November 2019
3.14 Emergency Operation
Back-up switch
(depends on variant)
(pull to unlock the
position)
Toggle switch with 2 or 3 locked positions (depends on variant).
The back-up switch is used for the selection of the operation mode:
BACK-UP:
Emergency operation.
NORM:
Normal operation.
SLAVED:
Slaved operation.
CAUTION:
In emergency mode, only a subset of the functionality is available.
Slave Operation
If there is a total loss of pilots or copilots ACU61 (ACU1, ACU2), the device can be connected in
parallel to the remaining ACU61 through the slaved mode.
The slaved mode is a first step of security in the case when ACU1 or ACU2 appears to be defective.
Emergency Operation - Slave Operation
Back-up switch
(depends on variant)
(pull to unlock the
position)
•
Pull the switch to unlock the position.
•
Manual selection to position "SLAVED".
o
The related mike and phone are now connected in parallel to the
remaining ACU.
Notice:
•
Slaved mode is only possible for ACU1 and ACU2.
Status at the device in slaved mode:
•
All keys and knobs are without functions.
Status at the other devices in the installation:
•
No limitations.
Back-Up Operation
•
The emergency operation (back-up operation) can be started manually through the
selection switch for the back-up function on the ACU61.
•
The emergency operation (back-up operation) starts automatically e.g. if there is total
power failure or if a fatal defect occurs in the internal supply of the device.
Emergency Operation - Back-Up Operation
Back-up switch
(depends on variant)
(pull to unlock the
position)
•
Pull the switch to unlock the position.
•
Manual selection to position "BACK-UP".
o
ACU1 and ACU2 are in back-up mode.
o
ACU3... are no longer in operation.
o
Headset 1 (normally the pilot) is connected to TX1 and FIX1.
o
Headset 2 (copilot) to TX2 and FIX2.
o
Intercom volume level is decreased to 50%.
o
CVR level is decreased to 50%.
Status at the device ACU1 and ACU2:
•
Limitations in the scope of functionality.
Status at the other devices in the installation:
•
All keys and knobs are without functions.
