ATR 42 Model : 400/500
GENERAL
FIRE PROTECTION
P 2
NOV 97
001
1.08
.
10
AVIONICS SMOKE DETECTION
(See schematic 1.03.30 p. 3)
The avionics extract air duct is provided with a smoke detection device, linked to the
CCAS. Smoke detection between the avionics compartment and the extract fan
activates a ELEC SMK" red alert on CAP.
ENGINE FIRE EXTINGUISHING SYSTEM
It includes two extinguishers bottles which may be used for engine n
°
1 or engine
n
°
2. They are located on each side of the fuselage. Dual squibs are installed in the
discharge heads on each bottle. For fire extinguishing, the squibs are ignited by
depressing the correcponding illuminated AGENT pb on the ENG FIRE panel.
The extinguishing agent (freon or halon) is pressurized by nitrogen.
COCKPIT, CABIN AND CARGO COMPARTMENTS FIRE EXTINGUISHING SYSTEM
Portable extinguishers are provided to be operated manually (refer to schematic
1.07.10 p. 2 for location).
TOILETS WASTE BIN FIRE EXTINGUISHING SYSTEM
The system operates automatically when fire is detected (when the temperature is
greater than 78
°
C (172
°
F).
AA
R
R
R
R
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01/07//2018 REV 1 These notes are not revised after issue For Training Purposes Only
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