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SAE ARP4418

Procedure for Sampling and Measurement of Engine Generated Contaminants in Bleed Air Supplies from Aircraft Engines Under Normal Operating Conditions

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Organization: SAE
Publication Date: 1 August 1995
Status: inactive
Page Count: 25
scope:

SCOPE:

The following individual engine compressor generated contaminants are addressed by this SAE Aerospace Recommended Practice (ARP):

a. Carbon dioxide

b. Hydrogen fluoride

c. Organic material

d. Carbon monoxide

e. Acrolein

f. Respirable particles

g. Oxides of nitrogen

h. Formaldehyde

For reference purposes, information is also given on the current maximum allowable engine bleed air concentration limits for each of these contaminants, as stated in the latest issue of AIR4766.

Recommended techniques for engine sampling and sample transfer are given, together with the specific analytical methodology and acceptable alternate referenced analytical methodology for each of the above contaminants.

Recommendations are also made for an engine test format and for the allowance of ambient air quality on the engine measured contaminant concentration levels.

The previous list of contaminants are considered appropriate for the certification and passenger safety requirements of both civil and military aircraft.

Purpose:

This document describes the measurement technology required for the quantification of specified aircraft gas turbine engine generated gaseous and particulate contaminants in cabin bleed air supplies, under normal operating conditions.

Sections:

The procedure is divided into the following sections:

a. Scope

b. References

c. Recommended Specification Limits of Contaminants

d. Methodology

e. Revisions

f. Appendix

Document History

November 1, 2018
(R) Procedure for Sampling and Measurement of Aircraft Propulsion Engine and APU Generated Contaminants in Bleed Air
This ARP outlines recommended practices to quantify the concentrations of a subset of bleed air contaminant marker compounds on an aircraft propulsion engine or APU prior to delivery and installation...
January 1, 2008
(R) Procedure for Sampling and Measurement of Engine and APU Generated Contaminants in Bleed Air Supplies from Aircraft Engines
Aircraft propulsion engine and APU manufacturers shall demonstrate that air provided to the aircraft cabin is of acceptable quality. This ARP provides the basic information required to perform an...
SAE ARP4418
August 1, 1995
Procedure for Sampling and Measurement of Engine Generated Contaminants in Bleed Air Supplies from Aircraft Engines Under Normal Operating Conditions
SCOPE: The following individual engine compressor generated contaminants are addressed by this SAE Aerospace Recommended Practice (ARP): a. Carbon dioxide b. Hydrogen fluoride c. Organic material d....
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