DANGER ZONE
CABIN ALTITUDE
WARNING OR
RAPID DEPRESSURIZATION
DRILL
Masks first. Talk second.
← DRILLS4.6 · BOEING 737 NG
Cabin Altitude Warning or Rapid Depressurization
Au premier signe de perte de pressurisation, le PIC, s’il est assis, prend les commandes. Étapes en anglais. Notes en français.
| PILOT-IN-COMMAND | SECOND-IN-COMMAND |
|---|---|
|
“I HAVE CONTROL, RAPID DEPRESSURIZATION DRILL”
|
|
|
Don oxygen mask, turn on speaker, and select BOOM/MASK switch to MASK.
Use the lower INT position on the control column MIC switch, or INT on the audio control panel.
|
Don oxygen mask. Same radio setup. |
|
“PILOT-IN-COMMAND ON OXYGEN”
|
“SECOND-IN-COMMAND ON OXYGEN”
|
| FASTEN BELTS sign ...... ON |
Pressurization mode selector ...... MAN
Outflow valve switch ...... Hold in CLOSE until the outflow valve shows fully closed.
|
| Assess the situation. Look for a complete decompression: outflow valve position and cabin differential, bleed switch configuration and APU status, L/R duct pressures and PACK status. | |
|
If cabin altitude is controllable
Continue manual operation to maintain the correct cabin altitude.
When cabin altitude is at or below 10,000 feet, oxygen masks may be removed.
|
|
|
If cabin altitude is uncontrollable
“EMERGENCY DESCENT DRILL”
|
“NO CONTROL”
If cabin altitude exceeds, or is expected to exceed, 14,000 feet: PASSENGER OXYGEN switch ...... ON
|
Masques avant tout.
On ne diagnostique pas à visage nu. L’appel ON OXYGEN confirme que les deux sont branchés.
MAN et valve fermée.
Ça arrête la fuite contrôlée. Si la cabine tient, masques retirés seulement à 10 000 ft cabine, et stable.
Pas de contrôle.
Le PIC lance l’Emergency Descent Drill. Le SIC dit NO CONTROL, puis PASS OXYGEN ON vers 14 000 ft. Masques passagers chimiques, environ 12 minutes.
Aide-mémoire de drill. La procédure publiée et le QRH font foi.