AEE – Automatic Emergency Descent March 2015 · AEE – Automatic Emergency Descent March 2015...

March 2015AEE – Automatic Emergency Descent

Automatic Emergency DescentPresented by Florent Lanterna

Airbus – EYCC

Background: Emergency Descent Procedure


© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.

Automatic Emergency Descent Objectives

Background:- 7 Memory Items to be done within short time and 7 Actions to initiatethe descent: Possible way to reduce pilot workload.- Reaction time is a key element to save all passengers, the crew and theA/C if a depressurization occurs.

Objective 1: To assist Emergency Descent Procedure� To ease procedure execution.



Objective 2: To provide a “Last Safety Net”� To cover depressurization without crew reaction (TUC* in cruise = 9 to 15s);

Based on automatic Arming and Engagement.

� To ease procedure execution.� To cover most common scenarios of emergency descent with crew in the loop.

Based on a sequence of 2 Actions.

*TUC = Time of Useful Consciousness

AED maneuvers

�Vertical maneuver• A descent at VMO/MMO – 5kts

to the maximum between 40NM MORA or 10,000ft

Max(10.000ft,40NM MORA)



=2.75N

M

�Lateral maneuver• A right lateral offset of

2.75NM to get free of traffic (except if initially in HDG mode)

Max(10.000ft,40NM MORA)

No Autopilot control laws impact

EMER DESTHR IDLE HDG

AED objective 1: to assist emergency descent procedure

�� Pilot manually arm and engage the function• 2 Memory Items to initiate the descent;• Previous procedure execution still possible.

EVENT REQUIRING EMER DES

1-PushEMER DESCENT

EMER DESCENT




ALT

XPDRSQUAWK

7700

MISC EMER DESCENT

� ACTIVATE

� CREW OXY MASKS............................USE

SIGNS …....................................ON

? TYPE OF EMER DESCENT ?

CAB PRESS EXCESS CAB ALT

� CREW OXY MASKS...........................USE

� DESCENT.............................INITIATE

� MAX FL: 100 / MEA

WHEN DESCENT ESTABLISHED

ALT CRZSPEED NAV

�� Automatic autopilot sequence without pilot action• Compatible with crew interactions at any moment

CAB ALT ≥ 14.000 FT

AED objective 2: to provide a “last safety net”

Phase 1 Phase 2



ALT CRZSPEED NAVEMER DES







ALTCountdown3...2...1...

XPDRSQUAWK

7700






�� Automatic autopilot sequence with pilot action• Compatible with crew interactions at any moment

CAB ALT ≥ 14.000 FT

AED objective 2: to provide a “last safety net”

Phase 1 Phase 2

EMER DESCENT



ALT CRZSPEED NAVEMER DES







ALT

XPDRSQUAWK

7700






Countdown14...13...12...

HMI / mechanization

• FMA

EMER DESCENT

EMER DESCENT

EMER DESCENT

EMER DESCENT

EMER DESCENT

ON steadyON flashing OFF



• FCU• AP/FD/ATHR auto-engagement• Speed: VMO/MMO - 5kt• HDG target update: right side step• ALT target update: max (MORA; 10,000ft)

• PFD/HUD messages• EMER DESCENT ARMED

AUTO EMER DES IN 15 S

AUTO EMER DES ENGAGED

AUTO EMER DES COMPLETED

Last safety net sequence

[3] A corrective RA is triggered: TCAS mode engages, EMER DES disengages

AED and AP/FD TCAS

[1] AED engagement

TRAFFIC, TRAFFIC!

ADJUST V/S, ADJUST!CLEAR OF CONFLICT!

[2] A TA is triggered: TCAS mode arms



MORA

[4] Once “Clear of Conflict” audio sounds, TCAS mode disengages and a reversion in V/S mode occurs. ALT mode is armed and the aircraft is guided towards the AFS-CP selected altitude

[5] At any moment, flight crew may manually (re-)arm and then (re-)engage AED (pushbutton + speed brakes).If last safety net countdown criteria are still verified, it triggers and leads to AED automatic engagement after 15 seconds.

© Airbus S.A.S. All rights reserved. Confidential and proprietary document. This document and all information contained herein is the sole property of AIRBUS. No intellectual property rights are granted by the delivery of this document or the disclosure ofits content. This document shall not be reproduced or disclosed to a third party without the express written consent of AIRBUS S.A.S. This document and its content shall not be used for any purpose other than that for which it is supplied. The statementsmade herein do not constitute an offer. They are based on the mentioned assumptions and are expressed in good faith. Where the supporting grounds for these statements are not shown, AIRBUS S.A.S. will be pleased to explain the basis thereof.AIRBUS, its logo, A300, A310, A318, A319, A320, A321, A330, A340, A350, A380, A400M are registered trademarks.


AED is a new feature…


…available soon on A350 XWB family!

AEE – Automatic Emergency Descent March 2015 · AEE – Automatic Emergency Descent March 2015...

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