. /.  WORLD TRADE  
ORGANIZATION  G/TBT/N/USA/75 
3 September 2004 
 (04-3665) 
Committee on Technical Barriers to Trade Original:  English 
   
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6. 
 
1. Member to Agreement notifying:   UNITED STATES
 
If applicable, name of local government involved (Articles 3.2 and 7.2):         
2. Agency responsible:   Federal Aviation Administration (79)  
Name and address (including telephone and fax numbers, e-mail and web-site 
addresses, if available) of  agency or authority designated to handle comments 
regarding the notification shall be  indicated if different from above:         
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):   Flight guidance systems  
(HS 88) (ICS 49.090)   
5. Title, number of pages and language(s) of the notified document:   Safety Standards for 
Flight Guidance Systems and Proposed Revisi ons to Advisory Circular 25-1329-1A, 
Automatic Pilot Systems Approval; Proposed Ru le and Notice (16 pages, in English) 
6. Description of content:   The Federal Aviation Administration proposes to amend the 
airworthiness standards for transport category airplanes concerning flight guidance systems. 
The proposed standards address the performance, safety, failure protection, alerting, and 
basic annunciation of these systems. This proposed rule is necessary to address flight guidance system vulnerabilities and to consolidat e and standardize regulations for functions 
within those systems.  This proposed rule  would also update the current regulations 
regarding the latest technology and functiona lity. Adopting this proposal would eliminate 
significant regulatory differences between the airworthiness standards of the U.S. and the 
Joint Aviation Authorities of Europe. 
7. Objective and rationale, including the na ture of urgent problems where applicable:  
To protect human life and health 
8. Relevant documents:   69 Federal Register (FR) 50239 13 August  2004; Title 14 Code of 
Federal Regulations (CFR) Part 25.  Will a ppear in the Federal Register when adopted. 
9. Proposed date of adoption:   
Proposed date of entry into force:   }To be determined 
10. Final date for comments:   12 October 2004 G/TBT/N/USA/75 
Page 2  
 
11. Texts available from:  National enquiry point [ X] or address, telephone and fax 
numbers, e-mail and web-site addresses, if available of the other body:        
Full text is available online at these Internet URLs: 
(HTML) 
http://a257.g.akamaitech.net/7/257/24 22/06jun20041800/edocket.access.gpo.gov/2004/04-
18351.htm 
(PDF) 
http://a257.g.akamaitech.net/7/257/24 22/06jun20041800/edocket.access.gpo.gov/2004/pdf/
04-18351.pdf 
 