AIRCRAFT
Electrical Power
DA 42 NG AMM
Page 10
15 Mar 2018
24-00-00
Doc # 7.02.15
Rev. 4
(9) LH ECU Bus
If MÄM 42-403 is not carried out the LH ECU BUS is located on the right side, center (for fuel
pumps), and left side of the instrument panel at the bottom. If MÄM 42-403 is carried out the
LH ECU BUS is located on the right side and center (for fuel pumps) of the instrument panel at
the bottom. The LH ECU BUS has power when power is applied to the LH MAIN BUS or if the
left engine alternator is online.
The LH ECU BUS provides power for the both ECU A and ECU B functions of the LH engine
control unit and to the ECU A and ECU B fuel pumps. If MÄM 42-403 is not carried out both
ECU A and ECU B supplies are protected by 20 Ampere and 7.5 Ampere circuit breakers. If
MÄM 42-403 is carried out both ECU A and ECU B supplies are protected by a 20 Ampere
circuit breaker and a 5 Ampere fuse. If MÄM 42-403 is carried out the LH ECU BUS also
provides electrical power for the RH ECU B and its fuel pump.
(10) RH ECU Bus
If MÄM 42-403 is not carried out the RH ECU BUS is located on the right, center and left side
of the instrument panel at the bottom. If MÄM 42-403 is carried out the RH ECU BUS is located
on the right side and center (for fuel pumps) of the instrument panel at the bottom. The RH ECU
BUS has power when power is applied to the RH MAIN BUS or if the right engine alternator is
online.
The RH ECU BUS provides power for the both ECU A and ECU B functions of the RH engine
control unit and to the ECU A and ECU B fuel pumps. If MÄM 42-403 is not carried out both
ECU A and ECU B supplies are protected by 20 Ampere and 7.5 Ampere circuit breakers. If
MÄM 42-403 is carried out both ECU A and ECU B supplies are protected by a 20 Ampere
circuit breaker and a 5 Ampere fuse. If MÄM 42-403 is carried out the RH ECU BUS also
provides electrical power for the LH ECU B and its fuel pump.
(11) Avionics Bus
The AVIONICS BUS supplies power to avionic consumers through circuit breakers and fuses.
The power to the AVIONICS BUS is supplied by the RH MAIN BUS and is controlled by the
avionics master relay and AV. MASTER switch.
(12) Avionics Master Control System
The AV. MASTER switch and the avionics master relay make the main components of the
avionics master control system.
In normal operation the AV. MASTER switch is set to the ON position. In the OFF position the
power is supplied to the coil of the avionics master relay and the avionics master relay operates
and removes power from the AVIONICS BUS.
Summary of Contents for DA 42 NG
Page 933: ...AIRCRAFT DA 42 NG AMM Fuel Doc 7 02 15 Rev 4 28 TITLE Page 1 15 Mar 2018 CHAPTER 28 FUEL ...
Page 1459: ...AIRCRAFT DA 42 NG AMM Lights Doc 7 02 15 Rev 4 33 TITLE Page 1 15 Mar 2018 CHAPTER 33 LIGHTS ...
Page 1711: ...AIRCRAFT DA 42 NG AMM Doors Doc 7 02 15 Rev 4 52 TITLE Page 1 15 Mar 2018 CHAPTER 52 DOORS ...
Page 1853: ...AIRCRAFT DA 42 NG AMM Wings Doc 7 02 15 Rev 4 57 TITLE Page 1 15 Mar 2018 CHAPTER 57 WINGS ...
Page 2071: ...AIRCRAFT DA 42 NG AMM Engine Doc 7 02 15 Rev 4 72 TITLE Page 1 15 Mar 2018 CHAPTER 72 ENGINE ...
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