SOP B73C · AILO-0022.7 · Amendment 2 · 15 déc 2025 · 4.7 · p.158
Flow SOP 4.7 — puis NNC QRH 0.3. Ne pas réécrire l’arbre QRH ici.
The rapid descent procedure will normally be performed by the PIC. However, the SIC will perform this procedure if the PIC is not seated or is incapacitated.
SOP p.158
Pilot-in-command
“EMERGENCY DESCENT DRILL”
Over the PA, command: “EMERGENCY DESCENT REMAIN SEATED” (3 times)
Passenger signsON
ENGINE START switchesCONT
MCP AltitudeLOWER ALT
LVL CHGSelect
Thrust leversClose
SpeedbrakeFLIGHT DETENT
MCP SpeedMMO/VMO
If structural integrity is in doubt, limit speed as much as possible and avoid high manoeuvring loads.
If turbulence is encountered, maintain Turbulence Penetration speed.
Adjust speed and level off altitude on MCP.
Continue descent towards lowest safe altitude or 10,000 feet (whichever is higher).
Second-in-command
Advise ATC: “PAN PAN AIR INUIT _____ EMERGENCY DESCENT, REQUEST ALTIMETER SETTING”
Set transponder code to 7700.
Silently review QRH checklist memory items and complete any missed items.
Approaching level-off (SOP p.159)
Pilot-in-command
Reduce Airspeed.
Smoothly lower the SPEEDBRAKE lever to the DOWN detent and level off.
Add thrust and stabilize on altitude and airspeed.
Assess cause and determine subsequent course of action. The new course of action is based on weather, oxygen, fuel remaining and available airports.
Continue descent when appropriate (cabin rate of descent should not exceed 500'/minute where possible).
Below 10,000 feet, PA: “Ladies and gentlemen, this is your captain speaking, you may remove your masks and breathe normally. Remain seated with your seatbelts fastened. Flight attendant, contact flight deck”.
Second-in-command
When approaching the level off altitude, call: “2000 ABOVE”
Call: “1000 ABOVE”
Continue the QRH checklist.
Advise ATC and obtain appropriate clearance.
WARNING
DO NOT REMOVE OXYGEN MASKS UNTIL CABIN ALTITUDE IS AT OR BELOW 10,000'.