Garmin G950 IFDS -Supplement
Page S3 - 9
Section 3 – Emergency procedures
Both alternators failure
4
th
Edition, Rev. 0
2.3
B
OTH ALTERNATORS OVERVOLTAGE
Annunciation window
Alert window
L BUS VOLT HIGH
Lh overvoltage
R BUS VOLT HIGH
Rh overvoltage
In event of both L and R BUS VOLT HIGH warning alerts displayed:
1.
FIELD LH and RH
BOTH OFF
2.
FIELD LH and RH
BOTH ON (one at a time)
If the LH (or RH) BUS VOLT HIGH warning is still displayed
3.
Verify good ammeter indications on restored alternator
4.
Refer to Single alternator failure / overvoltage drill (Para 2.1)
If both LH and RH BUS VOLT HIGH warning are still displayed
3.
CROSS BUS LH and RH
BOTH OFF
4.
FIELD LH and RH
BOTH OFF
5.
FIELD LH and RH
BOTH ON (one at a time)
If LH (or RH) BUS VOLT HIGH warning is still displayed
6.
Verify good ammeter indications on restored alternator
7.
Switch CROSS BUS on the restored alternator side
8.
Refer to Single alternator failure / overvoltage drill (Para 2.1)
If both LH and RH BUS VOLT HIGH warning are still displayed
6.
FIELD LH and RH
BOTH OFF
If engine starting battery modification is applied
7.
EMERG BATT switch
ON
8.
Land as soon as possible.
If engine starting battery modification is not applied
7.
Land as soon as possible
Equipment will be lost accordingly to the following table:
AHRS /ADC are fed from battery bus if Mod 2006/135 is embodied
LH Gen Bus
LH Avionic Bus
RH Avionic Bus
RH Gen Bus
Pitot Heat
DME
ADF
NAV Lights
Landing Light
Transponder
COM 2
Rudder Trim
Taxi Light
A/P
NAV 2
Stall Warning
A/P Pitch Trim
MFD
AHRS/ADC*
The battery can supply electrical power for at least 30 minutes.
NOTE
Summary of Contents for P2006T
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