Fire Protection

Question 1

Recall important considerations if FIRE WARNING test is conducted using BATTERY
POWER only

Answer 1

All indications will be the same as with “External Power Available” EXCEPT
the First Officer’s MASTER WARNING light will not illuminate and the cyan
PODS TEST PASS alert message on the EAD will not be displayed
NOTE: After APU is started and all busses are powered, the Fire Warning test must
be re-accomplished to confirm all correct indications

Question 2

Recall indications of an ENGINE FIRE (5)

Answer 2

L/R ENG FIRE handle light(s) illuminate
FUEL switch light(s) illuminate
Aural/vocal warnings sound
ENGINE L/R FIRE alert(s) displayed on EAD
MASTER WARNING lights flash

Question 3

Recall indications of an APU FIRE (5)

Answer 3

APU automatically shuts down
APU FIRE alert displayed on the EAD
MASTER WARNING lights flash
FIRE light on external APU ground control panel
illuminates
Aural/vocal warnings sound (flight deck – 3 cycles;
exterior – horn will remain audible until the fire is
extinguished.)

Question 4

Recall indications of CARGO SMOKE or FIRE (8)

Answer 4

MASTER WARNING lights flash
MASTER CAUTION lights illuminate
CARGO SMOKE voice warning will be heard from CAWS
CARGO SMOKE FWD (AFT) level 3 alert on EAD and AIR SD
DISCH CARGO AGENT – Displayed on EAD and AIR SD
“Land at Nearest Suitable Airport” – Displayed on CONSEQUENCE Page
AIR SD will display RED triangles
AFT/FWD CARGO SMOKE AGENT DISCH switchlight will flash “PUSH”

• Approximately one minute after the first bottle has been discharged, the illuminated amber AFT/FWD CARGO SMOKE AGENT DISCH “PUSH” switchlight will extinguish and be replaced by an amber “LOW” light indicating the first Halon bottle has discharged. A CARGO AGENT 1 LO alert will also be displayed on the EAD
• Approximately six minutes later, similar alerts will direct the crew to discharge the second Halon bottle into the appropriate cargo compartment. The second bottle, however, discharges at a much slower rate and the CARGO AGENT 2 LO alert will illuminate after about 2 hours
• The red triangles displayed on the AIR synoptic are cargo smoke detectors

Question 5

Recall cockpit indications of a LAVATORY FIRE

Answer 5

MASTER CAUTION lights illuminate
LAVATORY SMOKE alert on EAD
HI-LO chime on PA

Question 6

Recall the operation of the Engines/APU LOOPS switches on the AFT Overhead Panel (BOTH, A/B)

Answer 6

The fire detection system consists of two independent, heat-sensitive detector loops
located in each engine and the APU. Each loop provides both fire and overheat
detection
BOTH (Normal position) – minimizes false fire warnings since both loops have to
detect fire or overheat condition before activating a fire warning
A/B - Used for dispatch or continued flight with an inoperative loop. In this condition, a
fire warning will occur if the selected loop detects a fire or overheat condition

Question 7

Recall features of the Engine Fire Extinguishing Controls and Indicators

Answer 7

ENG FIRE Handle Light Illuminated – Associated engine fire is detected or test in progress
Pull (Fully Extended) – Shuts off associated engine FUEL and HYDRAULIC shutoff valves, trips GENERATOR off and silences AURAL/VOCAL warnings if the MASTER WARNING light has not been pushed.

Question 8

Recall features of the Cargo Smoke Detection and Fire Suppression Controls
CARGO SMOKE FWD/AFT
Switch (SINGLE, NORM)
AFT/FWD CARGO SMOKE
AGENT DISCH Switchlight

Answer 8

CARGO SMOKE FWD/AFT
Switch (2)
SINGLE – Selects single smoke
detection system
NORM – Selects normal dual
smoke detection system 
AFT/FWD CARGO SMOKE
AGENT DISCH Switchlight (4)
PUSH – light flashes (amber) to
indicate fire/smoke is detected
in cargo compartment. Pushing
switchlight discharges the fire
extinguishing agent and
changes the light from flashing
to steady. PUSH light will
extinguish when the LOW light
illuminates.
LOW light illuminates (amber)
after the fire extinguishing agent
has been discharged. PUSH
light extinguishes.

The Cargo Smoke test is disabled for six minutes after establishing
electrical power.

Question 9

Recall components of the ENG and APU fire extinguishing system

Answer 9

The engine and APU fire extinguishing
system consists of two fire extinguisher
agent containers and associated AGENT
LOW lights
Each fire bottle has separate discharge
heads and distribution lines to each
engine and the APU

Question 10

Recall features of the CARGO FIRE Detection system

Answer 10

The Cargo Smoke Detection System consists of multiple photoelectric smoke detectors mounted in recessed pans in each cargo compartment ceiling
• The system uses two Halon fire extinguishing agent bottles connected to both forward and aft cargo compartments
• The system is designed as a dual detection system and normally requires any two detector activations in a cargo compartment to trigger the alarm. However, selection of the SINGLE position, as appropriate, on the CARGO SMOKE DET SYS panel, will allow only one detector to activate the alarm
NOTE: The system can suppress a fire for approximately 80 minutes