Testing operation of central warning systems

Preliminary requirements

Required Conditions

Action/Condition	Procedure/Data
Make sure that the circuit breakers are closed.

Designation	CB
FAN	2132CB1
ICS	2350CB1
BAG LT	2430CB1
FUEL LVL	2811CB1
	2811CB2
HYD	2911CB1
GIA COM	3141CB1
GIA SYS	3141CB2
GEA	3143CB1
PFD	3160CB1
MFD	3160CB2
	3160CB3
PITOT HTR	3411CB1
	3412CB1
	3420CB1
XPDR	3451CB1
ECU CH A	7600CB1
ECU CH B	7600CB2
ENG IGN/VLV	7600CB3
ACU MODE	7600CB4
ACU NEUT	7600CB5
ECU RLYS	7600CB6

Connect headsets to the pilot and copilot headset jacks.
Install the ground power unit (preferred).	Installing the ground power unit (GPU)
Set the BATT switch to the BATT position on the miscellaneous control panel (alternative).

Support equipment

Name	Identification/References	Quantity	Remark
Headset	H10-13H	2	David Clark H10-13H (or equivalent)

Safety conditions

Use a ground power unit, if available, to prevent draining the battery of its stored electrical power.

Procedure

1. After a sufficient time, make sure that the messages that follow show on the Primary Flight Display (PFD):

XMSN OIL PRESS

FUEL PRESS

ENG OIL PSI LO

ENGINE OUT

When using battery:

GEN

When using external power:

GEN

BATT OFF

WOG

EXT POWER

1. Make sure that no other warning, caution, advisory, and status message show on the PFD.

2. Push the AUD TST softkey on the ENGINE page/TEST PAGE.

3. Make sure that you hear the tones that follow one after the other:

• Master warning tone: "Ping" that repeats three times.

• Low rotor RPM tone: continuous warble.

• ENGINE OUT: "Engine out" voice message.

• ECU FAIL: "ECU Fail" voice message.

• Airspeed above VNE: continuous "Ting".

• JAR-OPS 150 feet: "150" voice message.

• Master caution tone: single "Ping".

• ENGINE FIRE: "Engine fire" voice message.

• Near a limit: double "Ping".

• RPM Annunciator: "RPM" illuminated.

• Instrument Fans: Instrument fans operate continuously.

1. Push AUD TST softkey to stop test.

Requirements after job completion

Required Conditions

Action/Condition	Procedure/Data
Remove the ground power unit (if used).	Removing the ground power unit (GPU)
Set the BATT switch to the OFF position on the miscellaneous control panel (if used).
Disconnect the headsets from the pilot and copilot headset jacks.