March 3, 2015 

Rebecca Peacock 

Airworthiness Specialist 

Rolls-Royce plc PO Box 31 

Derby DE24 8BJ 

England 

Dear: Ms. Peacock 

This letter is to inform you that we are unable to process your request for an 

exemption from§ 33.27(!)(6) of Title 14, Code of Federal Regulations (14 CFR) for 

the Trent 1 000-AE, -CE, -AE2, and -CE2 turbofan engines. It explains why we 

crumot process your request and what you should do in the next 30 days. 

Why We Can Not Process Your Request 

Your exemption request on behalf of Rolls-Royce plc was entered into the public 

docket (No. FAA-2015-0156) on January 23, 2015, but we are unable to process 

your request any further. The information you sent does not comply with the 

requirements of§ 11.81(d) (copy enclosed). Specifically, we need to know what is 

the benefit to the public as a whole. 

What You Should Do 

If you want us to process your request any further, you must send the information 

described earlier to reach us within 30 days. We will consider the docket on your 

request open until we receive this required information from you. Please note that 

§ 11.63( d) requires you to send your petition for exemption at least 120 days before 

the proposed effective date of the exemption. 

If We Do Not Hear From You 

If we do not hear from you within 30 days, we will close the docket without 
Acting Manager, Engine & Propeller Directorate 

Enclosure 
(3) The recordkeeping and reporting 

burdens of your proposed action and 

whom the burdens would affect. 

(4) The effect of your proposed action 

on the quality of the natural and social 

environments. 

§ 11.73 How does FAA process peti· 

tions for rulemaking? 

After we have determined the disposition of your petition, we will contact you in writing about our decision. 

The FAA may respond to your petition 

for rulemaking in one of the following 

ways: 

(a) If we determine that your petition 

justifies our taking the action you suggest, we may issue an NPRM or 

ANPRM. We will do so no later than 6 

months after the date we receive your 

petition. In making our decision, we 

consider: 

(1) The immediacy of the safety or security concerns you raise: 

(Z) The priority of other issues the 

FAA must deal with: and 

(3) The resources we have available 

to address these issues. 

(b) If we have issued an ANPRM or 

NPRM on the subject matter of your 

petition, we will consider your arguments for a rule change as a comment 

in connection with the rulemaking proceeding. We will not treat· your petition as a separate action. 

(c) If we have begun a rulemaking 

project in the subject area of your petition, we will consider your comments 

and arguments for a rule change as 

part of that project. We will not treat 

your petition as a separate action. 

(d) If we have tasked ARAC to study 

the general subject area of your petition, we will ask ARAC to review and 

evaluate your proposed action. We will 

not treat your petition as a separate 

action. 

(e) If we determine that the issues 

you identify in your petition may have 

merit, but do not address an Immediate 

safety concern or cannot be addressed 

because of other priorities and resource 

constraints, we may dismiss your petition. Your comments and arguments 

for a rule change will be placed in a 

database, which we will examine when 

we consider future rulemaking. 

29 

§ 11.75 Does FAA invite public com· 

ment on petitions for rulemaking? 

Generally. FAA does not Invite public comment on petitions for rulemaking. 

§ 11.77 Is there any additional infor· 

mation I must include in my peti· 

tion for designating airspace? 

In petitions asking FAA to establish, 

amend, or repeal a designation of airspace, including special use airspace, 

you must include all the information 

specified by §11.71 and also: 

(a) The location and a description of 

the airspace you want assigned or designated: 

(b) A complete description of the activity or use to be made of that airspace, including a detailed description 

of the type, volume, duration, time, 

and place of the operations to be conducted in the area; 

(c) A description of the air navigation, air traffic control, surveillance, 

and communication facilities available 

and to be provided if we grant the designation: and 

(d) The name and location of the 

agency, office, facility, or person who 

would have authority to permit the use 

of the airspace when It was not in use 

for the purpose to which you want it 

assigned. 

§ 11.81 What information must I include in my petition for an exemption? 

You must include the following information in your petition for an exemption and submit it to FAA as soon as 

you know you need an exemption. 

(a) Your name and mailing address 

and, if you wish. other contact information such as a fax number, telephone number, or e-mail address; 

(b) The specific section or sections of 

14 CFR from which you seek an exemption; 

(c) The extent of relief you seek, and 

the reason you seek the relief; 

(d) The reasons why granting your request would be In the public Interest: 

that is, how it would benefit the public 

as a whole: 

(e) The reasons why granting the exemption would not adversely affect 

safety, or how the exemption would 

provide a level of safety at least equal 
to that provided by the rule from 

which you seek the exemption; 

(f) A summary we can publish In the 

FEDERAL REGISTER, stating: 

(1) The rule from which you seek the 

exemption; and 

(2) A brief description of the nature 

of the exemption you seek; 

(g) Any additional information, views 

or arguments available to support your 

request; and 

(h) If you want to exercise the privileges of your exemption outside the 

United States, the reason why you 

need to do so. 

§ 11.83 How can I operate under an exemption outside the United States? 

If you want to be able to operate 

under your exemption outside the 

United States, you must request this when you petition for relief and give us 

the reason for this use. If you do not 

provide your reason or we determine 

that it does not justify this relief, we 

will limit your exemption to use within 

the United States. Before we extend 

your exemption for use outside the 

United States, we will verify that the 

exemption would be in compliance with 

the Standards of the International 

Civil Aviation Organization (ICAO). If it would not, but we still believe it 

would be in the public interest to allow 

you to do so, we will file a difference 

with ICAO. However, a foreign country 

still may not allow you to operate in 

that country without meeting the 

ICAO standard. 

§ 11.85 Does FAA invite public comment on petitions for exemption? 

Yes, FAA publishes information 

about petitions for exemption in the 

FEDERAJ, REGISTER. The information 

includes-

(a) The docket number of the petition; 

(b) The citation to the rule or rules 

from which the petitioner requested relief; 

(c) The name of the petitioner; 

(d) The petitioner's summary of the 

action requested and the reasons for requesting it; and 

(e) A request for comments to assist 

FAA in evaluating the petition. 

30 

§ 11.87 Are there circumstances in 

which FAA may decide not to pub- lish a summary of my petition for 

exemption? 

The FAA may not publish a summary 

of your petition for exemption and request comments if you present or we 

find good cause why we should not 

delay action on your petition. The factors we consider in deciding not to request comment include: 

(a) W'hether granting your petition 

would set a precedent. 

(b) Whether the relief requested is 

identical to exemptions granted previously. 

(c) Whether our delaying action on 

your petition would affect you adversely. 

(d) W'hether you filed your petition in 

a timely manner. 

§ 11.89 How much time do I have to 

submit comments to FAA on a petition for exemption? 

The FAA states the specific time allowed for comments in the FEDERAL 

REGISTER notice about the petition. We 

usually allow 20 days to comment on a 

petition for exemption. 

§ 11.91 How does FAA infonn me of its 

decision on my petition for exemption? 

The FAA will notify you in writing 

about its decision on your petition. A 

copy of this decision is also placed in 

the public docket. We will include the 

docket number associated with your 

petition in our letter to you. 

[Docket No. FAA-2005--22982, 71 FR 1485, Jan. 

10, 2006] 

§ 11.101 May I ask FAA to reconsider 

my petition for rulemaking or petition for exemption if it is denied? 

Yes, you may petition FAA to reconsider your petition denial. You must 

submit your request to the address to 

which you sent your original petition, 

and FAA must receive it within 60 days after we issued the deniaL For us to accept your petition, show the following: 

(a) That you have a significant additional fact and why you did not present 

it in your original petition; 

(b) That we made an important factual error in our denial of your original 

petition; or