1. B777 CABIN ALTITUDE AND RAPID DESCENT
Oct 17 – FCOM updated to Rev 54;
No Changes
28 June 17- FCOM Revision 53 added to title slide, no technical or procedural changes.
27 Sep 16 – Slides 8 & 10 OM-A Depressurisation or Rapid Descent, relevant information added.
FCOM Revision 52 added to title slide, no technical or procedural changes.
1 Aug 16 - Version number repositioned, FCTM ref updated to Rev 14
20 July New title and end style slide, Version 1 Revision 51
Global font EK03Plain-B01.
Added notes NA.
27 Feb 15- Changed Title Slide to be Version 1 FCOM Rev 49
No procedural or technical changes
Version FCOM Rev 54

2. RAPID DESCENT FCTM Rev 14 Page 7.6
The PM checks the lowest safe altitude, notifies ATC, and obtains an altimeter setting (QNH). Both pilots should verify that all memory items have been accomplished and call out any items not completed. The PM calls out 2,000 feet and 1,000 feet above the level off altitude.
Level off at the lowest safe altitude or 10,000 feet, whichever is higher. Lowest safe altitude is the Minimum Enroute Altitude (MEA), Minimum Off Route Altitude (MORA), or any other altitude based on terrain clearance, navigation aid reception, or other appropriate criteria.
If severe turbulent air is encountered or expected, reduce to the turbulent air penetration speed.

3. Cabin Altitude Memory Items
Don Oxygen Masks - 100%
(Select Speaker)
First Officer on
Oxygen – can you hear me?
PF - CABIN
ALTITUDE
Memory items
Captain on
Oxygen – can you hear me?
State Memory Items Actions for Cabin Altitude Warning.
Announce “CABIN ALTITUDE MEMORY ITEMS”
NNC 2.1 QRH
“Don mask and establish communications”. This must be accomplished without delay. [NB Comms in a 2-way process: each crew member must establish that the other can hear them].
CABIN ALTITUDE AND RATE, If cabin altitude uncontrollable PASSENGER OXYGEN SWITCH PUSH
Descent Accomplish
NNC 2.2 QRH

4. Clarification “If the cabin altitude is uncontrollable”
Reference: Boeing response to EK question is described in Training Newsletter November 2012
What is the Boeing interpretation of "Cabin Controllable"?
Boeing's interpretation of "cabin controllable" is the ability to maintain the cabin altitude below 10,000 feet.

5. Cabin Altitude and Rate ….Check
8500’ Air synoptic pops out.
Cabin Altitude & Rate … Check. If uncontrollable … Initiate Descent. Discuss what can be considered “If uncontrollable”.

6. Do NOT attempt to control the Cabin Altitude Manually
Do not attempt to close any OFV, as the OFV start to open when Cabin Altitude reaches aircraft altitude to prevent negative pressure.

7. PF – announce “Rapid Descent”
State how descent is accomplished.
Announce Rapid Descent
Instructors Guide
Set lower altitude. Engage FLCH
Close thrust levers. Smoothly extend the speedbrakes.
Discuss use of heading and speed in rapid descent.
Speed should be left as it is if structural damage suspected. If not set 325kts. Fly straight ahead or if turn required engage heading select.
FCTM 7.6
Instructors Guide

8. During Descent PF Control Flight Path Consider: 2000ft to go -
Structural Damage
Turbulence
Icing
2000ft to go -
Speed approx. 300 Kts / LRC
1000ft to go -
Retract Speedbrakes PM
Verify all Memory Items are complete
Call out omissions
Check MSA
Notify ATC
Obtain QNH
Accomplish Checklists
Call 2000 and 1000 to level off
State other airmanship actions that should be accomplished in the descent.
PM must obtain MORA and QNH during Descent.
FCTM VOL1 5.6
OM-A Depressurisation or Rapid Descent
If an explosive decompression occurs, cabin crew should remain seated until advised that it is safe to do otherwise. Where time permits, the announcement “This is the Captain, descent, descent” will be made to the cabin.
Additional altitude calls must be made at 2000’ and 1000’ to go to level off altitude.
ATC should be informed and transponder code 7700 set.
Instructor Guide
State when the Cabin Altitude Checklist should be accomplished.
The CABIN ALTITUDE Checklist is to be read aloud as soon as possible in the descent
QRH CI 2.2
CAPT
Where time permits, the announcement “This is the Captain, descent, descent” will be made to the cabin.

9. Approaching Level Off Select Lower Speed – 2000 to Level Off
Explain how level off should be accomplished
Approaching level off momentarily select a lower speed. As the airplane pitches up to slow down, slowly retract the speedbrake. Reset required speed after altitude capture.
FCTM VOL1 5.
Describe considerations after level off
After level off. Do not remove the oxygen mask if cabin altitude remains above feet. Determine new course of action based on status of PAX and Crew, weather, oxygen availability, and available airports.
Select Lower Speed – 2000 to Level Off
Slowly stow speedbrake – 1000 to Level Off

10. After Level Off Recheck Pressurisation
Come off Oxygen at or below ft (one at a time)
Restore Headset and Boom Mike
P.A. to Cabin Crew and Passengers
Determine course of action (Management Model)
Fuel
Oxygen
Weather
Actions after Level Off following rapid descent
Depressurisation or Rapid Descent
When the aircraft has levelled off, the Commander will make the following announcement: “This is the Captain. We have had to perform a rapid descent” followed by:
a. If oxygen is still required:
“You must remain seated and continue to wear your oxygen masks. Cabin crew may move in the cabin using portable oxygen.”
b. If oxygen is no longer required:
“You must remain seated, oxygen is no longer required and you may remove your oxygen masks. Cabin crew may move in the cabin.”