G/TBT/N/USA/1615  
4 May 2020  
(20-3404) Page: 1/2 
Committee on Technical Barriers to Trade  Original:  English  
 
  NOTIFICATION  
The following notification is being circulated in accordance with Article 10.6  
 
1. Notifying Member:  UNITED STATES OF AME RICA  
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:  Federal Aviation Administration (FAA) [1642]  
Name and address (including telephone and fax numbers , email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated i f different from above:   
Please submit comments to: USA WTO TBT Enquiry Point, Email: usatbtep@nist.gov  
3. Notified under Article 2.9.2 [X], 2.10.1 [   ], 5.6.2 [   ], 5.7.1 [   ], other :  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided in addition, where applicable):  
Oxygen  cylinder and valve assemblies; Fluid storage devices (ICS 23.020), Valves 
(ICS 23.060), On -board equipment and instruments (ICS 49.090), Passenger and cabin 
equipment (ICS 49.095)  
5. Title, number of pages and language(s) of the notified document:  Airworthiness 
Directives; AVOX System Inc. (formerly Scott Aviation) Oxygen Cylinder and Valve 
Assemblies; and Oxygen Valve Assemblies (4 page(s), in English)  
6. Description of content:  Notice of proposed rulemaking - The FAA proposes to adopt a 
new airworthiness directive (AD) for certain AVOX System Inc. (formerly Scott Aviation) 
oxygen cylinder and valve assemblies; and oxygen valve a ssemblies; installed on but not 
limited to various transport airplanes. This proposed AD was prompted by reports of 
cylinder and valve assemblies having oxygen leakage from the valve assembly vent hole, 
caused by the absence of a guide that maintains appro priate spacing between certain 
parts. This proposed AD would require an inspection of the oxygen valve assemblies, and 
oxygen cylinder and valve assemblies, to determine the serial number of the valve, 
cylinder, and entire assembly. For assemblies and part s with certain serial numbers, this 
AD would require a detailed inspection for correct spacing of the gap between the bottom 
of the packing retainer and top of the valve body on the assemblies, and replacement of 
assemblies having unacceptable gaps. The FA A is proposing this AD to address the unsafe 
condition on these products.  
7. Objective and rationale, including the nature of urgent problems where 
applicable:  Protection of human health or safety  
8. Relevant documents:   
• 85 Federal Register (FR) 25353, 1 May 2020; Title 14 Code of Federal Regulations 
(CFR) Part 39:  
https://www.govinfo.gov/content/pkg/FR -2020-05-01/html/2020 -09115.htm  
https://www.govinfo.gov/content/pkg/FR -2020-05-01/pdf/2020 -09115.pdf  G/TBT/N/USA/1615  
 
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  The docket folder on Regulations.gov provides access to primary and supporting 
documents for this rulemaking:  
https://www.regulations.gov/docket?D=FAA_FRDOC_0001 . 
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments:  15 June 2020  
11. Texts available from:  National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available , of other body:   
https://members.wto.org/crnattachments/2020/TBT/USA/20_3056_00_e.pdf