Decompression

Question 1

TUC at:
30,000 ft
35,000 ft
40,00 ft

Answer 1

35,00 ft - 30-50 seconds

Question 2

What altitude is the cabin simulated to?

Answer 2

Cabin is simulated to 5,000-7,000ft when flying at altitudes above 10,000ft

Question 3

Non-pressurisation signs

Answer 3

Ears popping for longer after take off
Progressive tiredness
If altitude exceeds 15,000ft hypoxia develops

Question 4

Slow decompression causes

Answer 4

Small cracks in window, fuselage, damaged door, minor fault in pressurisation system

Question 5

Rapid and explosive decompression causes

Answer 5

Sudden fail of pressurisation system
Damage to the fuselage structure

Question 6

Slow decompression signs

Answer 6

Ears popping
O2 mask deployment
Hypoxia may start taking place

Question 7

Rapid and explosive decompression signs

Answer 7

Loud noise
O2 mask deployment
Sinus pain
Must
Cold air (warm on airbus - smell of burning)
Trapped gas
Boiling liquids and containers bursting

Question 8

At what altitude will flight crew be alerted about rising cabin altitude?

Answer 8

When cabin altitude reaches approx 14,000-15,000ft

Question 9

What may be the indications that cabin altitude has reached 14,000-15,000 ft

Answer 9

O2 masks will deploy
FSB lights will illuminate automatically
Airbus: exit markings will illuminate
B787: 5 lo-chimes sound, cabin lights increase to full bright and PA vol max

Question 10

Decompression Drill - Flight crew

Answer 10

1. Don o2 quick Don masks
2. Extend speed brakes, reduce engine power, turn and descend rapidly (emergency descend)
3. PA “CC EMERGENCY DESCENT” x2
4. FC will make PA once AC levelled to safe altitude “FSM TO THE INTERPHONE IMMEDIATELY” x2

Question 11

Decompression drill - Cabin Crew
(When o2 masks deploy OR when advised by FC)

Answer 11

1. Fit nearest o2 mask
2. Sit down (on pax lap if necessary)
3. Strap in (or ask pax to hold you)
4. Breaths normally
5. Note time on wrist watch
6. Wedge trolley between seats, put brake on
7. If possible make decompression PA (QRG)
8. Shout commands to passengers

Question 12

(Continued) Decompression drill - cabin crew
IF EMERGENCY DESCENT IS HEARD

Answer 12

8. FC will make PA to advise about emergency descent
   “CC emergency descent” x2
9. Remain seated until FC make PA to advise the AC is levelled off and no oxygen is required
10. PA
    “FSM to the Interphone immediately” x2
11. Cabin crew till check: toilets, galleys, crew areas
12. ABPS brief about keeping PAX away from doors
13. Administer first aid and PO2 as required
14. Check for fire and structural damage
15. FSM to update captain, receive NITS as required

Question 13

(Continued) Decompression drill - cabin crew
IF EMERGENCY DESCENT IS NOT HEARD

Answer 13

If no emergency descent is heard after 60s -

8. CC nearest to flight deck must apply oxygen masks on the way to PO and proceed to flight deck
9. Enter emergency access code
10. Ensure flight crew are on oxygen, if not fit quick Don O2 masks (be aware of oxygen paradox)

Question 14

When flying at what altitude is cabin simulated to 5,000-7,000ft?

Answer 14

10,000 ft