Document ID: chunk:federal_register_of_legislation:F2007C00850:body:0:p1
Version: federal_register_of_legislation:F2007C00850
Segment Type: other
Provision Reference: 
Character Range: 0–3049

Civil Aviation Order 108.26 (as amended)

made under subregulations 207 (2) and (3) of the Civil Aviation Regulations 1988.
This compilation was prepared on 2 November 2007 taking into account amendments up to Civil Aviation Order 108.26 Amendment Order (No. 1) 2007.
Prepared by the Legislative Drafting Branch, Legal Services Group, Civil Aviation Safety Authority, Canberra.

Contents
System specification — oxygen systems

Page
1 Application
2 Abbreviations
3 Oxygen specifications
4 System arrangements
5 Dispensing units
6 Minimum mass flow of supplemental oxygen
7 Protective breathing equipment
 Appendix II
 Notes to Civil Aviation Order 108.26

Section 108.26

System specification — oxygen systems

1 Application
       1.1This section of Civil Aviation Orders contains specifications for aircraft oxygen systems intended for operation at altitudes up to 40 000 feet and is applicable in such circumstances as may be specified by CASA or an authorised person under the Civil Aviation Regulations 1988.
Note   Specifications for oxygen systems in aircraft intended for operations at altitudes above 40 000 feet are subject to separate determination by CASA.

2 Abbreviations
BTPD means body temperature and pressure dry.
BTPS means body temperature and pressure saturated.
STPD means standard temperature and pressure dry.
(0C. at 760 mm Hg, dry)

3 Oxygen specifications
       3.3 (1) Oxygen used in gaseous oxygen systems must comply with a specification acceptable to CASA.
       The following specifications are acceptable:
 C.I.G. Gas Code 420 or 430;
 RAAF Specification G172;
 U.K. Ministry of Defence DEF STAN 68-2 1/1;
 U.S. Military Specification MIL-0-272 10.
        (2) Oxygen produced by chemical means in an aircraft oxygen system must comply with a specification acceptable to CASA.
       The following specifications are acceptable:
 U.S. Military Specification MIL-E-83252;
 Scott Engineering Report 1024.

4 System arrangements
       4.3Portable oxygen units may be used to meet the crew or passenger breathing requirements.

5 Dispensing units
       5.1An individual dispensing unit must be installed for each occupant for whom supplemental oxygen is to be supplied.  A unit must be equipped with a suitable means to retain the unit in position on the face.
       5.1.1A unit:
(a) must not adversely affect a person's ability to use the aircraft's electronic communication equipment while using the unit; or
(b) must provide alternative electronic communication equipment that the person can use while using the unit.
       5.1.2The units provided in an aircraft operating at or below flight level 180 must include at least 1 unit designed to cover the nose and mouth for every 15 units provided.
       5.1.3Every unit provided in an aircraft operating above flight level 180 must be designed to cover the nose and mouth.
       5.1.4Every unit installed in an unpressurised aircraft on or after 10 January 1996 must meet the requirements of paragraph 5.1.6.
       5.1.5On and after 10 January 1999, every