Fire Protection

Question 1

How many lbs of Halon for High Rate and Low Rate Cargo Fire Bottles

Answer 1

High Rate = 13 lbs
Low Rate = 22 lbs
Halon 1301 Agent

Question 2

What happens if APU EMER. STOP button is pushed after fire has been detected

Answer 2

1. APU shuts down with 1 min cooldown
2. APU Fuel SOV closes
3. APU Fire Extin. button illuminated

Question 3

What are 3 indications of APU Fire

Answer 3

1. Fire Bell
2. EMER. STOP Button upper half illuminates Red
3. APU Fire displayed in EICAS

Question 4

What is Power source for Engine and APU Fire Detection and Protection

Answer 4

Engine Detection - DC ESS Bus 1/2
Engine Protection - Hot BATT Bus 1/2
APU Detection - DC ESS Bus 1/2

Question 5

Describe Cargo Smoke Detection System

Answer 5

1. DC ESS Bus 2
2. FWD Cargo (3) Smoke Detectors (2 must be in agreement)
3. AFT Cargo (2) Smoke Detectors (both must be in agreement)
4. AFT Smoke is detected, Recirc. Fans shut Off and Ventilation Outflow Valve Closes

Question 6

Describe APU Fire Detection System

Answer 6

1. DC ESS Bus 1/2
2. 1 Fire Bottle
3. APU Fire Exting.Button illuminates when APU EMER. STOP is pressed or 1 minute after alarm if No action is taken
4. Red Light in APU Fire Exting. extinguishes when Fire is No longer detected

Question 7

Describe Engine Fire Protection

Answer 7

1. HOT BATT Bus 1/2 powered
2. 2 Fire Bottles (1 shot per bottle)
3. Fire Handle (Fuel SOV, Hydraulic SOV, Bleed SOV, Cross Bleed SOV)
4. Fire Handle and ITT warning will remain illuminated until No indication of Fire exsists

Question 8

Describe Engine Detection

Answer 8

1. DC ESS Bus 1/2
2. 2 Fire Loops per Engine (gaseous type)
3. Both Loops must detect a Fire Overheat to get a Fire indication unless 1 Loop is inop
4. 2 LH/RH FWD Tube, 1 AFT Helium Tube, Pylon Tube (8 total or 4 per loop)