Flight Warning System

Question 1

The main component of the Flight Warning System is a ….. channel Flight Warning Computer ?

Answer 1

2

Question 2

What warnings are NOT processed by the Flight Warning Computer ?

Answer 2

Stall
Ground Proximity
Windshear Warnings

Question 3

What is the meaning of the following issued by the FWC :
1. Level 3 alert ?
2. Level 2 alert ?
3. Level 1 alert ?

Answer 3

1. Level 3 alerts require immediate pilot awareness and subsequent corrective or compensatory action.
2. Level 2 alerts require immediate pilot awareness and subsequent corrective or compensatory action.
3. Level 1 alerts require pilot awareness (which might require action).

Question 4

What is presented to the crew in the event of a level 3 alert ?

Answer 4

The presentation comproses a repetivie triple chime, 2 flashing red MWL’s, and an MFDU alert message in red.

Engine related level 3 alerts are accompanied by a white light in the relevant fuel lever.

Engine and APU fire are also indicated by a red light at the respective fire panels.

Question 5

What is presented to the crew in the event of a level 2 alert ?

Answer 5

The presentation comprises a double chime, two flashing amber MCL’s, an MFDU alert message in amber, and, if applicable, the relevent amber local light (s).

Question 6

What is presented to the crew in the event of a level 1 alert ?

Answer 6

Level 1 alerts are not annunciated by MWL or MCL

Question 7

What are the 2 level 3 annunciations that cannot be cancelled by depressing either MWL ?

Answer 7

1. The landing-gear-not-down (with flap down) alert.
2. The take-off-configuration alerts.

Question 8

What is the maximum number of alert messages that can be displayed on the MFDU ?

Answer 8

11

Question 9

What symbol denotes the lastincoming alert message ?

Answer 9

A pointer

Question 10

What is the descending priority order of FWC-processed aural alerts ?

Answer 10

1. Cavalry charge (with or without autoland caution lights)
2. Whooler (tone adaptive to trim rate)
3. Clacker
4. Repetitive triple chime and MWL
5. Autoland caution lights (without cavalry charge)
6. ‘C’ chord
7. Double chime and MCL
8. Single chime

Question 11

What are the 12 flight phases used by the FWC ?

Answer 11

Phase 1 - from electrical power on to first engine on;
Phase 2 - from first engine on until selection of TO power;
Phase 3 - from TO power to 80 kt;
Phase 4 - from 80 kt to lift-off;
Phase 5 - from lift-off to 400 ft;
Phase 6 - from 400 ft to 1000 ft;
Phase 7 - above 1000 ft;
Phase 8 - from 1000 ft down to 400 ft;
Phase 9 - from 400 ft to touchdown;
Phase 10 - from touchdown to 80 kt;
Phase 12 - from last engine off until 5 minutes later.

Question 12

What phase does the FWC adopt should a rejected take-off occur:

1. Below 80 kts ?
2. Above 80 kts ?
3. After the T/L’s are advanced after a rejected take-off?

Answer 12

1. Phase 3 changes to phase 11
2. Phase 4 changes to 10
3. When the thrust levers are advanced above idle after a rejected take-off the system reverts to phase

Question 13

What phase does the FWC revert to when, during a ground stop, electrical power is maintained until 5 minutes after engine shutdown ?

Answer 13

Phase 12 changes to phase 1

Question 14

What provides crew with system warnings should there be a complete FWC failure ?

Answer 14

The WARN SYS light at the Standby Annunciator Panel (SAP), comes on and the backup mode, in which the SAP is operative, is automatically selected.

Question 15

How long does it take for the Flight Warning System Test to take place ?

Answer 15

30 seconds

Question 16

During a Flight Warning System Test what will occur should :

1. 1 filiment not pass ?
2. Both filaments not pass ?

Answer 16

1. Asingle filament failure is indicated by flashing of the other filament.
2. When both filaments in one light fail, all other red and amber FWC-controlled lights come on.