B744 FIRE PROTECTION Flashcards
Indications of an engine fire?
Both Master Warning Lights
Engine Fire Light
Fuel Control switch Light
EICAS Fire MSG
What will unlock a Fire switch?
Fire Warning
Fuel Control switch in CUTOFF
Override switch/button
What happens when I pull a Fire switch?
Closes Engine & Spar fuel valves Closes Engine Bleed valve Trips Gen field Shuts off HYD to EDP Depressurizes the Demand pump Arms both Fire extinguishers on the related wing
How many Fire bottles are available to an engine?
Two on each wing
What type of Fire detection do the engines have?
Dual loop (“and” system)
Will I get a Fire warning for an Engine Overheat?
No, that would be an Overheat warning
What type of detection do I have for a cargo fire?
Dual loops (“and” system);
4 loops in each Lower compartment,
16 in the Main (uses sample air from the center bleed duct)
What happens when I push the MAIN DECK cargo fire ARM switch?
- Enables Main Deck fire suppression
- Turns off 2 Packs
- Turns off all airflow to the Main Deck
- Turns off all airflow & heat into the lower cargo compartments
- Closes the master Trim Air Valve
- Configures Equip Cooling to closed loop
What happens when I push the FWD or AFT cargo fire ARM switch?
- Turns off 2 Packs
- Arms respective Lower Cargo compartment fire extinguishers
- Turns off all airflow & heat into the Lower Cargo compartments
- Closes the master Trim Air Valve
- Configures Equip Cooling to override
What happens when I push the cargo fire DEPRESS/DISCH switch if the MAIN DECK cargo fire arm switch is armed?
Initiates airplane depressurization to a cabin altitude of 25,000’
What happens when I push the cargo fire DEPRESS/DISCH switch if the FWD or AFT cargo fire arm switch is armed?
Initiates extinguisher discharge sequence to provide effective agent concentration for 334 minutes (2 bottles discharge immediately and the other 4 discharge after a brief delay or upon touchdown)
