Fire Protection

Question 1

What fire detection do the cargo compartments have? What fire protection do the cargo compartments have (ETOPS vs non-ETOPS)?

Answer 1

• Fwd and Aft compartments each have smoke detectors in a dual loop config. Normally, both must sense smoke to cause an alert.
• ETOPS have total fire suppression of 195 minutes (180 min to land plus add’l 15 min)
• Non-ETOPS have fire suppression of 75 min (60 min to land and add’l 15 min)

Question 2

Within how many min must you land after initial discharge of cargo fire suppression system?

Answer 2

60 min (700s & non-ETOPS 800/Max)
180 min (ETOPS 800/Max)

Question 3

During cargo fire test, the detector fault light will illuminate under what condition?

Answer 3

1 or more detectors in the loop has failed

Question 4

What indicates successful cargo fire test? (5 answers)

Answer 4

• Fire warning bell sounds
• Both Master FIRE WARN lights illuminate
• Extinguisher lights will illuminate
• FWD and AFT cargo fire illuminate when all detectors in the selected loop respond to test
• Cargo fire bottle DISCH light illuminates

Question 5

During cruise, the cargo fire (FWD/AFT) Warning light illuminates red, master fire warn lights illuminate, and the fire warning bell sounds. What condition exists.

Answer 5

• At least 1 detector in each loop detects smoke
• With power failed in 1 loop, at least 1 detector on the remaining loop detects smoke

Question 6

With cargo fire, what indications would you expect to see after discharging the bottle?

Answer 6

• FWD/AFT cargo fire warning light(s) can extinguish, remain illuminated, or re-illuminate over the remainder of the flight.

Question 7

On the ground during engine start and after pushback crew cleared off, they give you hand signals for an engine fire with no fire indications on the flight deck. What may be the actual condition?

Answer 7

Tailpipe fire

Question 8

What occurs if 1 of the 2 engine fire detection loops fail with the OVHT DET switch in Normal?

Answer 8

The loop is automatically deselected and the remaining loop functions as a single loop detector. There is no flight deck indication of single failure.

Question 9

What powers the engine overheat and fire detection? Extinguishing?

Answer 9

• Engine overheat and fire DETECTION powered by the battery bus
• Engine fire EXTINGUISHING powered by the hot battery bus

Question 10

When selecting the OVHT/FIRE during the Fire/Overheat Warning Test, you notice the FAULT Light is illuminated. What may be the problem and how do you determine in which engine the fault occurred?

Answer 10

A detection loop is inoperative. The related ENGINE FIRE WARNING switch and ENG OVERHEAT light do NOT illuminate. To determine inop loop, follow the AOM

Question 11

During a cargo fire detection system test, how can you determine if a loop is inop?

Answer 11

The cargo fire warning light does NOT illuminate and a DETECTOR FAULT light does.

Question 12

What consideration, with regards to the landing gear, should be taken during execution of the Wheel Well Fire checklist in QRH following a wheel well fire warning?

Answer 12

Landing gear speed limits should be observed during this checklist

Question 13

In an ETOPS aircraft with an ARMED Cargo Fire switch, what occurs when pushing the cargo fire discharge switch?

Answer 13

First extinguisher bottle discharges into the selected compartment and timer set to discharge second with a reduced metered flow