G/TBT/N/USA/1720/Add.1  
 
10 November 2021  
(21-8521) Page: 1/2 
Committee on Technical Barriers to Trade  Original: English  
 
 
NOTIFICATION  
Addendum  
The following communication , dated  10 November 2021 , is being circulated at the request of the 
delegation of the United States of America . 
 
_______________  
 
 
Title: Airworthiness Directives; Rolls -Royce Deutschland Ltd & Co KG (Type Certificate Previously 
Held by Rolls -Royce Deutschland GmbH, Formerly BMW Rolls -Royce GmbH) Turbofan Engines  
 
Reason for Addendum:  
[  ] Comment period changed - date:   
[  ] Notified measure adopted - date:  
[X] Notified measure published - date: 9 November 2021  
[X] Notified measure enters into force - date: 13 December 2021  
[X] Text of final measure available from1:  
https://www.govinfo.gov/content/pkg/FR -2021-11-08/html/2021 -24182.htm  
https://www.govinfo.gov/content/pkg/FR -2021-11-08/pdf/2021 -24182.pdf  
https://members.wto.org/crnattachments/2021/TBT/USA/final_measure/21_7103_00_
e.pdf 
[  ] Notified measure withdrawn or revoked - date:  
Relevant symbol if measure re -notified:   
[  ] Content or scope of notified measure changed  and text available from1:  
New deadline for comments (if applicable):   
[  ] Interpretive guidance issued and text available from1:  
[  ] Other:  
 
Description:  TITLE: Airworthiness Directives; Rolls -Royce Deutschland Ltd & Co KG (Type 
Certificate Previously Held by Rolls -Royce Deutschland GmbH, Formerly BMW Rolls -Royce GmbH) 
Turbofan Engines  
AGENCY: Federal Aviation Administration (FAA), DOT  
ACTION: Final rule  
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain Rolls -Royce 
Deutschland Ltd & Co KG (RRD) BR700 -710A2 -20 model turbofan engines. This AD was prompted 
by flight data obtained from airplanes equipped with certain Rockwell Collins a vionics and auto - 
throttle systems that demonstrated significant oscillation of the engine rotor revolution speed during 
 
1 This information can be provided by including a website address, a pdf attachment, or other 
information on where the text of the final /modified  measure and/or interpretive guidance can be obtained.  G/TBT/N/USA/1720/Add.1  
 
- 2 - 
 
  flight. This AD requires initial and repetitive recalculation of the consumed and remaining service life 
of certain life -limited parts (LLPs). This AD also requires removal of an LLP prior to its approved life 
limit or within 90 days after the effective date of this AD, whichever occurs later. The FAA is issuing 
this AD to address the unsafe condition on these products.  
DATES: This AD is effective 13 December 2021.  
The Director of the Federal Register approved the incorporation by reference of a certain publication 
listed in this AD as of 13 December 2021.  
This final rule and the notice of proposed rulemaking notified as G/TBT/N/ USA/1720  are identified 
by Docket Number FAA -2021-0257. The Docket Folder is available on Regulations.gov 
at https://www.regulations.gov/docket/FAA -2021-0257/document  and provides access to primary 
and supporting documents as well as comments received. Documents are also accessible 
from Regulations.gov  by searching the Docket Number.  
__________