Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (26)
Page 8 of 11
CHAPTER 26 – FIRE PROTECTION (26-00-00)
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COPYRIGHT

2007 BY DART AEROSPACE LTD.

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
5
Date: 12.06.20
26.9 FIRE EXTINGUISHER
Two hand type, manually operated, fire
extinguishers are furnished with the helicopter.
One is located to the right of the pilot’s seat on the
floor. The other is mounted on the left side of the
cabin. Mounting brackets are of the quick opening
type for rapid removal of the extinguishers.
26.10 ENGINE FIRE EXTINGUISHER
The engine fire extinguisher system consists of a
release switch, located on the upper center panel
of the instrument panel, and a fire extinguisher
cartridge located on the left side of service deck
aft of engine.
The engine fire extinguisher, located on the
service deck, is used to extinguish fires in the
engine compartment. A 1500 PSI pressure gage
on the side of the sphere indicates internal
pressure. A fitting and integral thermal relief and
fill valve on the opposite side of the sphere
provides the means for charging the unit. This
valve contains a fusible alloy which acts as a
thermal relief valve when the internal temperature
of the charged unit exceeds the maximum limits.
An electrically actuated squib screwed into the
housing assembly provides the means for
controlling the release of the extinguishing agent.
When the squib is actuated, an explosive charge
breaks the valve plug, thus releasing the agent
into the system. The FIRE EXT circuit breaker and
the ENGINE FIRE EXTINGUISHER switch, both
located on the overhead console, control the 28
VDC power to actuate the squib.
In the event a container is subjected to excessive
heat, the fill and thermal relief fitting will open and
allow the extinguishing agent to escape. During this
process, the discharge indicator disc will be blown
out to provide a visual indication of the event.
26.10.1 Testing – Discharge Circuit
26.10.1.1
Refer to 96.13.5.
26.10.2 Removal
26.10.2.1
Disconnect the two electrical wires.
26.10.2.2 Disconnect
the tube assembly (2, Figure
26-3) from the extinguisher output connector.
26.10.2.3 Disconnect tube assembly (4) from the
extinguisher fill-relief connector.
26.10.2.4 Remove the four mounting bolts and
remove fire extinguisher.
26.10.3 Installation
26.10.3.1 Place the fire extinguisher on mounting
bracket. Use AN960-416L washers between lugs of
fire extinguisher and bracket for alignment,
maximum of three washers at each lug. Install bolt
with AN970-4 washer under head. Install washer
and nut.
26.10.3.2 Connect tube assembly (4) to the
extinguisher fill-relief valve.
INDICATION OF TROUBLE PROBABLE CAUSE CORRECTIVE ACTION
No voltage at fire extinguisher
cartridge connector Defective FIRE
EXTINGUISHER circuit
breaker Replace circuit breaker
Defective ENGINE FIRE
EXTINGUISHER switch Replace switch
Defective wiring Repair or replace wiring