G/TBT/N/USA/1720  
20 April 2021  
(21-3320) 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 AMERICA   
If applicable, name of local government involved (Article 3.2 and 7.2):   
2. Agency responsible:  Federal Aviation Administration (FAA) [1749]  
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 [   ], 2.10.1 [   ], 5.6.2 [X], 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):  Quality 
(ICS 03.120), Aircraft and space vehicles in general (ICS 49.020), Aerospace engines and 
propulsion systems (ICS 49.050)  
5. Title, number of pages and language(s) of the notified document:  Airworthiness 
Directives; Rolls -Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by 
Rolls-Royce Deutschland GmbH, Formerly BMW Rolls -Royce GmbH) Turbofan Engines (4 
page(s), in E nglish)  
6. Description of content:  Notice of proposed rulemaking - The FAA proposes to adopt a 
new airworthiness directive (AD) for certain Rolls -Royce Deutschland Ltd & Co KG (type 
certificate previously held by Rolls -Royce Deutschland GmbH, formerly BMW  Rolls- Royce 
GmbH) (RRD) BR700 -710A2 -20 model turbofan engines. This proposed AD was prompted 
by flight data obtained from airplanes equipped with certain Rockwell Collins avionics and 
auto-throttle systems that demonstrated significant oscillation of the  engine rotor 
revolution speed during flight. This proposed AD would require initial and repetitive 
recalculation of the consumed and remaining service life of certain life -limited parts 
(LLPs). This proposed AD would also require removal of an LLP prior t o its approved life 
limit or within 90 days after the effective date of this AD, whichever occurs later. The FAA 
is proposing this AD to address the unsafe condition on these products.  
7. Objective and rationale, including the nature of urgent problems wh ere 
applicable:  Protection of human health or safety  
8. Relevant documents:   
86 Federal Register (FR) 17326, 2 April 2021; Title 14 Code of Federal Regulations 
(CFR) Part 39:  
https://www.govinfo.gov/content/pkg/FR -2021-04-02/html/2021 -06800.htm  
https://www.govinfo.gov/content/pkg/FR -2021-04-02/pdf/2021 -06800.pdf  
This notice of proposed rulemaking is identified by Docket Number FAA -2021-0257. The 
Docket Folder is available on Regulations.gov  at G/TBT/N/USA/1720  
 
- 2 - 
 
  https://www.regulations.gov/docket/FAA -2021-0257/document  and provides access to 
primary documents as well as comments received. Documents are also accessible from 
Regulations.gov  by searching the Docket Number. WTO Members and their stakeholders 
are asked to submit comme nts to the USA TBT Enquiry Point . Comments received by the 
USA TBT Enquiry Point from WTO Members and their stakeholders will be shared with the 
regulator and will also be submitted to the Docket  on Reg ulations.gov if received within 
the comment period.  
9. Proposed date of adoption:  To be determined  
Proposed date of entry into force:  To be determined  
10. Final date for comments:  17 May 2021  
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/2021/TBT/USA/21_2843_00_e.pdf