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• The combination of outside air and filtered
recirculated air produces a flowrate that
removes cabin generated contaminants fast
and raises humidity
• Extracted air flows to the outflow
valve and to the recirculation filters
• Airbus aircraft use high efficiency recirculation
filters with no bypass capability - all recirculated air is filtered.
• Ventilation air used for galleys, toilets, cargo holds and avionics
compartments is vented overboard. It is not recirculated.
Inlet air
Extracted air
SEE2 948.0095/03 April 2003 Page 5
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
SARS - Airbus aircraft systems
Cabin re-circulation fan operation :
• Augments cabin air relative humidity, reduces rate of
drying of nose/eyes/throat
• Optimises cabin temperature comfort
•Maximises air exchange rate
• With HEPA filters, the cabin air can have less particulate
content than air from outside
All Airbus production aircraft have HEPA filters
SEE2 948.0095/03 April 2003 Page 6
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
SARS - Airbus aircraft systems
Cabin air filters :
•Made of micro glass fibre, highly efficient filtration with low
pressure drop
• Reduce risk by removing dust, mold spores, bacteria and
viruses
• Utilize three different capture mechanisms with a collection
efficiency greater than 99.97%
• Virus size range 0.01 to 0.2 microns.
• Corona virus size is 0.08 to 0.12 microns
• Virus survival time is very low, due lack of live human cells
SEE2 948.0095/03 April 2003 Page 7
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
SARS - Airbus aircraft systems
99.95
99.96
99.97
99.98
99.99
100.00
0.001 0.01 0.1 1 10 100
Velocity = 0.035 m/s
Collection Velocity = 0.013 m/s
Efficiency
[%]
Particle Size [μm]
Velocity = 0.024 m/sAirbus recirculation
Extrapolated curves
Based on
measurement
Extrapolated curves
ATMOSPHERIC DUST
VIRUSES
TOBACCO SMOKE
MYCOBACTERIUM TUBERCULOSIS
BACTERIA
HUMAN SKIN CELL
POLLENS
HEPA Filters
Corona Virus
SEE2 948.0095/03 April 2003 Page 8
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
SARS - Airbus aircraft systems
Inertial impaction:
Smaller particles tend to impact the
filter material rather than following the
tortuous path through the media.
Diffusional interception:
Very small particles undergo considerable motion, which increases the
probability to be retained by molecular forces
Direct interception:
Interception of all particles which
are bigger than the pore size.
Filtration Principles
SEE2 948.0095/03 April 2003 Page 9
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
SARS - Airbus aircraft systems
Conclusion
• Operators must comply with the recommendations of local
medical authorities
• No specific change in aircraft operational procedures
• Airbus maintains close links with the World Health
Organisation and will continue to provide information
updates as appropriate
SEE2 948.0095/03 April 2003 Page 10
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
This document and all information contained herein is the sole
property of AIRBUS S.A.S. No intellectual property rights are
granted by the delivery of this document or the disclosure of
its 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 statements made 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.
AN EADS JOINT COMPANY
WITH BAE SYSTEMS
1
Applications of NDT Methods on Composite Structures in Aerospace Industry
Ulf Schnars, Rudolf Henrich
Airbus
Hünefeldstraße 1-5
D-28199 Bremen, Germany
Keywords
Non-Destructive Testing, NDT, ultrasonic testing, composite inspection, shearography,
thermography, laser ultrasound
Abstract
This paper reviews present NDT methods used for composite inspection in aircraft industry.
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