39380 Federal Register / Vol. 83, No. 154 / Thursday, August 9, 2018 / Proposed Rules 

tests that are identified as RC, those 

procedures and tests must be done to comply 

with this AD; any procedures or tests that are 

not identified as RC are recommended. Those 

procedures and tests that are not identified 

as RC may be deviated from using accepted 

methods in accordance with the operator’s 

maintenance or inspection program without 

obtaining approval of an AMOC, provided 

the procedures and tests identified as RC can 

be done and the airplane can be put back in 

an airworthy condition. Any substitutions or 

changes to procedures or tests identified as 

RC require approval of an AMOC. 

(l) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) EASA AD 

2018–0102, dated April 27, 2018, for related 

information. This MCAI may be found in the 

AD docket on the internet at http://

www.regulations.gov by searching for and 

locating Docket No. FAA–2018–0705. 

(2) For more information about this AD, 

contact Sanjay Ralhan, Aerospace Engineer, 

International Section, Transport Standards 

Branch, FAA, 2200 South 216th St., Des 

Moines, WA 98198; phone and fax: 206–231– 

3223. 

(3) For service information identified in 

this AD, contact Airbus SAS, Airworthiness 

Office—EAL, Rond-Point Emile Dewoitine 

No: 2, 31700 Blagnac Cedex, France; phone: 

+33 5 61 93 36 96; fax: +33 5 61 93 45 80; 

email: airworthiness.A330-A340@airbus.com; 

internet: http://www.airbus.com. You may 

view this service information at the FAA, 

Transport Standards Branch, 2200 South 

216th St., Des Moines, WA. For information 

on the availability of this material at the 

FAA, call 206–231–3195. 

Issued in Des Moines, Washington, on July 

27, 2018. 

James Cashdollar, 

Acting Director, System Oversight Division, 

Aircraft Certification Service. 

[FR Doc. 2018–16733 Filed 8–8–18; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2018–0611; Product 

Identifier 2018–NE–21–AD] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

plc Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for all 

Rolls-Royce plc (RR) Trent 1000–A2, 

Trent 1000–C2, Trent 1000–D2, Trent 

1000–E2, Trent 1000–G2, Trent 1000– 

H2, Trent 1000–J2, Trent 1000–K2, and 

Trent 1000–L2 turbofan engine models. 

This proposed AD was prompted by 

reports of intermediate-pressure 

compressor (IPC) rotor seal failures. 

This proposed AD would require initial 

and repetitive on-wing borescope 

inspections (BSI) of affected IPC rotor 

seals, and removing any cracked parts 

from service. We are proposing this AD 

to address the unsafe condition on these 

products. 

DATES: We must receive comments on 

this proposed AD by September 24, 

2018. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12 140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this NPRM, contact Rolls-Royce plc, 

Corporate Communications, P.O. Box 

31, Derby, England, DE24 8BJ; phone: 

011–44–1332–242424; fax: 011–44– 

1332–249936; email: corporate.care@

rolls-royce.com; internet: https://

customers.rolls-royce.com/public/ 

rollsroycecare. You may view this 

service information at the FAA, Engine 

& Propeller Standards Branch, 1200 

District Avenue, Burlington, MA 01803. 

For information on the availability of 

this material at the FAA, call 781–238– 

7759. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2018– 

0611; or in person at the Docket 

Operations office between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. The AD docket 

contains this NPRM, the mandatory 

continuing airworthiness information 

(MCAI), the regulatory evaluation, any 

comments received, and other 

information. The address for Docket 

Operations (phone: 800–647–5527) is 

listed above. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

Kevin M. Clark, Aerospace Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

781–238–7088; fax: 781–238–7199; 

email: kevin.m.clark@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2018–0611; Product Identifier 2018– 

NE–21–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this NPRM. We will consider 

all comments received by the closing 

date and may amend this NPRM 

because of those comments. 

We will post all comments we 

receive, without change, to http://

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this NPRM. 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Community, has issued EASA AD 2018– 

0095, dated April 24, 2018 (referred to 

hereinafter as ‘‘the MCAI’’), to address 

the unsafe condition on these products. 

The MCAI states: 

During an engine shop visit, an affected 

seal was found with cracking at the seal 

head. Propagation of such cracking may lead 

to failure, causing secondary impact damage 

to the IPC module. 

This condition, if not detected and 

corrected, could lead to engine power loss, 

possibly resulting in reduced control of the 

aeroplane. 

To address this potential unsafe condition, 

RR published the NMSB, providing 

instructions for on-wing borescope 

inspections. RR previously issued NMSB 

TRENT 1000 72–J353, which contains 

instructions for in-shop inspections. 

For the reasons described above, this 

[EASA] AD requires repetitive borescope 

inspections of the front face of the affected 

seals and, depending on the findings, 

accomplishment of applicable corrections 

action(s). 

You may obtain further information 

by examining the MCAI in the AD 

docket on the internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2018– 

0611. 

Related Service Information Under 1 

CFR Part 51 

We reviewed RR Non-Modification 

Service Bulletin (NMSB) Trent 1000 72– 


sradovich on DSK3GMQ082PROD with PROPOSALS
Federal Register / Vol. 83, No. 154 / Thursday, August 9, 2018 / Proposed Rules 39381 

J353, Revision 2, dated February 14, 

2018; RR Service Bulletin (SB) Trent 

1000 72–J704, Initial Issue, dated June 

23, 2017; and RR Alert NMSB Trent 

1000 72–AJ929, Initial Issue, dated 

November 23, 2017. RR NMSB Trent 

1000 72–J353, Revision 2, dated 

February 14, 2018, describes procedures 

for performing BSI of the front and rear 

face of the IPC rotor seal and defines 

acceptance and rejection criteria. RR SB 

Trent 1000 72–J704, Initial Issue, dated 

June 23, 2017, introduces a revised IPC. 

RR Alert NMSB Trent 1000 72–AJ929, 

Initial Issue, dated November 23, 2017, 

describes procedures for performing BSI 

of the front face of the IPC rotor seal and 

defines acceptance and rejection 

criteria. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in the ADDRESSES section. 

FAA’s Determination 

This product has been approved by 

EASA, and is approved for operation in 

the United States. Pursuant to our 

bilateral agreement with the European 

Community, EASA has notified us of 

the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all the 

relevant information provided by EASA 

and determined the unsafe condition 

exists and is likely to exist or develop 

on other products of the same type 

design. 

Proposed AD Requirements 

This proposed AD would require 

initial and repetitive on-wing BSI of 

affected IPC rotor seals, and removing 

any cracked parts from service. 

Costs of Compliance 

We estimate that this proposed AD 

affects 28 engines installed on airplanes 

of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspect IPC rotor seal ..................................... 7 work-hours × $85 per hour = $595 ............. $0 $595 $16,660 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701: 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

This AD is issued in accordance with 

authority delegated by the Executive 

Director, Aircraft Certification Service, 

as authorized by FAA Order 8000.51C. 

In accordance with that order, issuance 

of ADs is normally a function of the 

Compliance and Airworthiness 

Division, but during this transition 

period, the Executive Director has 

delegated the authority to issue ADs 

applicable to engines, propellers, and 

associated appliances to the Manager, 

Engine and Propeller Standards Branch, 

Policy and Innovation Division. 

Regulatory Findings 

We determined that this proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would not have a 

substantial direct effect on the States, on 

the relationship between the national 

Government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

the DOT Regulatory Policies and 

Procedures (44 FR 11034, February 26, 

1979), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 14 CFR part 

39 as follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

Rolls-Royce plc: Docket No. FAA–2018– 

0611; Product Identifier 2018–NE–21– 

AD. 

(a) Comments Due Date 

We must receive comments by September 

24, 2018. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Rolls-Royce plc (RR) 

Trent 1000–A2, Trent 1000–C2, Trent 1000– 

D2, Trent 1000–E2, Trent 1000–G2, Trent 

1000–H2, Trent 1000–J2, Trent 1000–K2, and 

Trent 1000–L2 turbofan engine models with 

intermediate-pressure compressor (IPC) rotor 

seal, part number (P/N) KH77674, installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7230, Turbine Engine Compressor 

Section. 

(e) Unsafe Condition 

This AD was prompted by reports of IPC 

rotor seal failures. We are issuing this AD to 

prevent an IPC rotor seal failure. The unsafe 

condition, if not addressed, could result in 

failure of the IPC rotor seal, loss of engine 

thrust control, and reduced control of the 

airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Perform an on-wing borescope 

inspection (BSI) of the IPC rotor seal using 

paragraph 3, Accomplishment Instructions, 


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39382 Federal Register / Vol. 83, No. 154 / Thursday, August 9, 2018 / Proposed Rules 

of RR Alert Non-Modification Service 

Bulletin (NMSB) Trent 1000 72–AJ929, Initial 

Issue, dated November 23, 2017, as follows: 

(i) For engines with an IPC rotor seal with 

300 cycles since new (CSN) or more as of the 

effective date of this AD, perform a BSI 

before the IPC rotor seal accumulates 400 

flight cycles (FC) after the effective date of 

this AD. 

(ii) For engines with an IPC rotor seal with 

less than 300 CSN as of the effective date of 

this AD, perform a BSI before the IPC rotor 

seal accumulates 300 CSN or within 100 FC 

after the effective date of this AD, whichever 

is later. 

(iii) For engines that were modified to 

incorporate RR Service Bulletin (SB) Trent 

1000 72–J704, Initial Issue, dated June 23, 

2017, before the effective date of this AD, 

perform a BSI before the IPC rotor seal 

accumulates 400 FC since the shop visit 

modification or before the next flight, 

whichever occurs later. 

(2) Repeat the on-wing BSI at intervals in 

accordance with Figure 2 of RR Alert NMSB 

Trent 1000 72–AJ929, Initial Issue, dated 

November 23, 2017. 

(3) An in-shop inspection in accordance 

with paragraph 3, Accomplishment 

Instructions, of RR NMSB Trent 1000 72– 

J353, Revision 2, dated February 14, 2018, 

may be substituted for an on-wing BSI as 

required by paragraphs (g)(1) and (2) of this 

AD, within the compliance times specified 

by paragraphs (g)(1) and (2) of this AD. 

(4) If a crack is found on the front face of 

the seal that is at or beyond the rejection 

limits specified in Figures 1, 2, and 3 of RR 

Alert NMSB Trent 1000 72–AJ929, Initial 

Issue, dated November 23, 2017, replace the 

IPC rotor seal with a part eligible for 

installation before further flight. 

(h) Operating Prohibition 

After the effective date of this AD, do not 

operate an aircraft that has two engines 

installed that are both required by this AD to 

complete either the 50 FC interval 

inspections or the single 100 FC fly-on period 

as specified in Figures 1, 2, and 3 of RR Alert 

NMSB Trent 1000 72–AJ929, Initial Issue, 

dated November 23, 2017. 

(i) Non-Required Action 

No reporting requirement contained within 

any of the Alert NMSBs referenced in 

paragraphs (g)(1), (2), and (3) of this AD are 

required by this AD. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, ECO Branch, FAA, has 

the authority to approve AMOCs for this AD, 

if requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ECO Branch, send it to 

the attention of the person identified in 

paragraph (k)(1) of this AD. You may email 

your request to: ANE-AD-AMOC@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(k) Related Information 

(1) For more information about this AD, 

contact Kevin M. Clark, Aerospace Engineer, 

ECO Branch, FAA, 1200 District Avenue, 

Burlington, MA 01803; phone: 781–238– 

7088; fax: 781–238–7199; email: 

kevin.m.clark@faa.gov. 

(2) Refer to European Aviation Safety 

Agency (EASA) AD 2018–0095, dated April 

24, 2018, for more information. You may 

examine the MCAI in the AD docket on the 

internet at http://www.regulations.gov by 

searching for and locating it in Docket No. 

FAA–2018–0611. 

(3) For service information identified in 

this proposed AD, contact Rolls-Royce plc, 

Corporate Communications, P.O. Box 31, 

Derby, England, DE24 8BJ; phone: 011–44– 

1332–242424; fax: 011–44–1332–249936; 

email: corporate.care@rolls-royce.com; 

internet: https://customers.rolls-royce.com/ 

public/rollsroycecare. You may view this 

referenced service information at the FAA, 

Engine & Propeller Standards Branch, 1200 

District Avenue, Burlington, MA 01803. For 

information on the availability of this 

material at the FAA, call 781–238–7759. 

Issued in Burlington, Massachusetts, on 

July 30, 2018. 

Robert J. Ganley, 

Manager, Engine and Propeller Standards 

Branch, Aircraft Certification Service. 

[FR Doc. 2018–16649 Filed 8–8–18; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2018–0694; Directorate 

Identifier 2016–SW–068–AD] 

RIN 2120–AA64 

Airworthiness Directives; Airbus 

Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for Airbus 

Helicopters Model EC225LP helicopters. 

This proposed AD would require 

repetitive inspections of each life raft 

inflation cylinder percussion system 

bellcrank (bellcrank). This proposed AD 

is prompted by reports of jammed 

bellcranks. The actions of this proposed 

AD are intended to prevent an unsafe 

condition on these products. 

DATES: We must receive comments on 

this proposed AD by October 9, 2018. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Docket: Go to 

http://www.regulations.gov. Follow the 

online instructions for sending your 

comments electronically. 

• Fax: 202–493–2251. 

• Mail: Send comments to the U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue SE, Washington, DC 

20590–0001. 

• Hand Delivery: Deliver to the 

‘‘Mail’’ address between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2018– 

0694; or in person at Docket Operations 

between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

The AD docket contains this proposed 

AD, the European Aviation Safety 

Agency (EASA) AD, the economic 

evaluation, any comments received, and 

other information. The street address for 

Docket Operations (telephone 800–647– 

5527) is in the ADDRESSES section. 

Comments will be available in the AD 

docket shortly after receipt. 

For service information identified in 

this proposed rule, contact Airbus 

Helicopters, 2701 N Forum Drive, Grand 

Prairie, TX 75052; telephone (972) 641– 

0000 or (800) 232–0323; fax (972) 641– 

3775; or at http://www.helicopters 

.airbus.com/website/en/ref/TechnicalSupport_73.html. You may review the 

referenced service information at the 

FAA, Office of the Regional Counsel, 

Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 

76177. 

FOR FURTHER INFORMATION CONTACT: 

David Hatfield, Aviation Safety 

Engineer, Safety Management Section, 

Rotorcraft Standards Branch, FAA, 

10101 Hillwood Pkwy., Fort Worth, TX 

76177; telephone (817) 222–5110; email 

david.hatfield@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to participate in this 

rulemaking by submitting written 

comments, data, or views. We also 

invite comments relating to the 

economic, environmental, energy, or 

federalism impacts that might result 

from adopting the proposals in this 

document. The most helpful comments 

reference a specific portion of the 

proposal, explain the reason for any 

recommended change, and include 

supporting data. To ensure the docket 

does not contain duplicate comments, 

commenters should send only one copy 


sradovich on DSK3GMQ082PROD with PROPOSALS