Federal Register / Vol. 87, No. 97 / Thursday, May 19, 2022 / Rules and Regulations 30411 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Viking DHC–6 Twin Otter Service 

Bulletin V6/0067, Revision A, dated January 

26, 2021. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Viking Air Ltd., 1959 de 

Havilland Way, Sidney British Columbia, 

Canada V8L 5V5; phone: (800) 663–8444; 

email: continuing.airworthiness@

vikingair.com; website: https://

www.vikingair.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, MO 64106. For information on 

the availability of this material at the FAA, 

call (817) 222–5110. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

email: fr.inspection@nara.gov, or go to: 

https://www.archives.gov/federal-register/cfr/ 

ibr-locations.html. 

Issued on April 30, 2022. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–10760 Filed 5–18–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–1004; Project 

Identifier MCAI–2021–00480–E; Amendment 

39–22030; AD 2022–09–10] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG (Type 

Certificate Previously Held by RollsRoyce plc) Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) RB211 Trent 875–17, 877–17, 

884–17, 884B–17, 892–17, 892B–17, and 

895–17 model turbofan engines. This 

AD was prompted by findings during 

engine overhaul of corrosion on the lowpressure compressor (LPC) front case 

assembly. This AD requires inspection 

of the LPC front case assembly and, 

depending on the result of the 

inspection, accomplishment of the 

applicable corrective action(s), as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

incorporated by reference. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective June 23, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of June 23, 2022. 

ADDRESSES: For material incorporated 

by reference in this AD, contact EASA, 

Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; phone: +49 221 8999 

000; email: ADs@easa.europa.eu. You 

may find this material on the EASA 

website at https://ad.easa.europa.eu. 

You may view this material at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 1200 District 

Avenue, Burlington, MA 01803. For 

information on the availability of this 

material at the FAA, call (817) 222– 

5110. It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

1004. For RRD service information 

identified in this AD, contact RollsRoyce plc, Corporate Communications, 

P.O. Box 31, Derby, DE24 8BJ, United 

Kingdom; phone: +44 (0)1332 242424 

fax: +44 (0)1332 249936; website: 

https://www.rolls-royce.com/contactus.aspx. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–1004; 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 

final rule, the EASA AD, any comments 

received, and other information. The 

address for Docket Operations is U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue SE, Washington, DC 

20590. 

FOR FURTHER INFORMATION CONTACT: 

Nicholas Paine, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7116; email: 

nicholas.j.paine@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2021–0114, 

dated April 23, 2021 (EASA AD 2021– 

0114), to address an unsafe condition 

for certain RRD RB211 Trent 875–17, 

877–17, 884–17, 884B–17, 892–17, 

892B–17, and 895–17 model turbofan 

engines. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to RRD RB211 Trent 875–17, 877– 

17, 884–17, 884B–17, 892–17, 892B–17, 

and 895–17 model turbofan engines. 

The NPRM published in the Federal 

Register on November 16, 2021 (86 FR 

63319). The NPRM was prompted by 

findings during engine overhaul of 

corrosion on the LPC front case 

assembly caused by excessive 

movement between the Kevlar wrap and 

the fan case, which resulted in the anticorrosion paint fretting away. In the 

NPRM, the FAA proposed to require the 

performance of all required actions 

within the compliance times specified 

in, and in accordance with EASA AD 

2021–0114, except for any differences 

identified as exceptions in the 

regulatory text of this AD and except as 

discussed under ‘‘Differences Between 

this Proposed AD and the EASA AD.’’ 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

See EASA AD 2021–0114 for additional 

background information. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

three commenters. The commenters 

were American Airlines (American), 

The Boeing Company (Boeing), and 

Rolls-Royce plc (RR). The following 

presents the comments received on the 

NPRM and the FAA’s response to each 

comment. 

Request To Revise Applicability 

American requested that the FAA 

revise paragraph (c), Applicability, of 

this AD to replace ‘‘as identified in 

EASA AD 2021–0114’’ with ‘‘RB211 

Trent 875–17, 877–17, 884–17, 884B– 

17, 892–17, 892B–17 and 895–17 

engines with Low Pressure (LP) 

Compressor front (fan) case assemblies 

having Part Number (P/N) FK33097, P/ 

N FK26850, P/N FK26853, P/N 

FK26915, P/N FK26692 or P/N 

FK28577.’’ American stated that certain 

engines identified in the EASA AD 

applicability section have already 

performed rework on the LPC front case 

assembly to provide additional 

corrosion protection using RR RB211 

Trent 800 Series Propulsion Systems 

Service Bulletin (SB) RB.211–72–G634 


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30412 Federal Register / Vol. 87, No. 97 / Thursday, May 19, 2022 / Rules and Regulations 

(RR SB RB.211–72–G634) or RR RB211 

Trent 800 Series Propulsion Systems SB 

RB.211–72–G856 (RR SB RB.211–72– 

G856) and the LPC front case assembly 

subsequently received a new P/N. 

American explained that, in addition to 

the new LPC front case assembly 

introduced by RR SB RB.211–72–G581, 

the new reworked LPC front case 

assembly P/Ns are not identified in the 

affected part list of the EASA AD. 

The FAA disagrees with revising 

paragraph (c), Applicability of this AD. 

Paragraph (c) lists engines affected by 

this AD and refers to EASA AD 2021– 

0114, which identifies the affected P/Ns 

of the LPC front case assemblies. The 

Credit paragraph (4) in EASA AD 2021– 

0114 provides, ‘‘Corrective action(s) on 

an engine, accomplished in accordance 

with the instructions of Rolls-Royce SB 

RB.211–72–G634 or SB RB.211–72– 

G856, are acceptable to comply with the 

requirements of paragraph (2) of this 

[EASA] AD for that engine.’’ The FAA 

notes that this AD requires compliance 

with EASA AD 2021–0114 in its 

entirety, including any credit for 

previous actions. The FAA did not 

change this AD as a result of this 

comment. 

Request To Revise Exceptions to EASA 

AD Paragraph 

RR requested that the FAA revise 

paragraph (h)(3) of this AD to ensure 

consistency with the Credit paragraph 

in EASA AD 2021–0114 or to provide an 

alternative means to accomplish the 

same intent. RR explained that the 

service information cited in EASA AD 

2021–0114 requires inspecting the 

affected part and contacting the 

manufacturer for repair instructions if 

corrosion exceeds the criteria in RR 

Alert Non-Modification Service Bulletin 

(NMSB) RB.211–72–G774. RR also 

explained that the NPRM proposed to 

require the removal of an affected LPC 

front case assembly if corrosion exceeds 

the criteria in RR Alert NMSB RB.211– 

72–G774. RR noted that this difference 

is inconsistent with the Credit 

paragraph of the EASA AD. 

In response to this comment the FAA 

has revised paragraph (h)(3) of this AD 

to include a repair option for the LPC 

front case assembly in lieu of removal. 

This revision allows operators to repair 

the affected LPC front case assembly 

using a method approved by the 

Manager, International Validation 

Branch, FAA; or EASA; or Rolls-Royce’s 

EASA Design Organization Approval 

(DOA). The FAA has also updated the 

Estimated Costs section of this preamble 

to include the estimated costs for 

repairing the LPC front case assembly. 

Support for the AD 

Boeing expressed support for the AD 

as written. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting this AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. Except for minor editorial 

changes and an update to the language 

in paragraph (h)(3), this AD is adopted 

as proposed in the NPRM. None of the 

changes will increase the economic 

burden on any operator. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed EASA AD 2021– 

0114. EASA AD 2021–0114 specifies 

instructions for inspecting the LPC front 

case assembly and, depending on the 

result of the inspection, corrective 

action. This material is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in ADDRESSES. 

Other Related Service Information 

The FAA reviewed Rolls-Royce 

RB211 Trent 800 Series Propulsion 

Systems Alert NMSB RB.211–72– 

AG774, Revision 4, dated October 13, 

2020 (the NMSB). The NMSB specifies 

procedures for inspecting the LPC front 

case assembly for corrosion and taking 

corrective action. 

Costs of Compliance 

The FAA estimates that this AD 

affects 98 engines installed on airplanes 

of U.S. registry. 

The FAA estimates the following 

costs to comply with this AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Perform ultrasonic inspection ......................... 8 work-hours × $85 per hour = $680 ............. $0 $680 $66,640 

Rework the LPC front case assembly ............ 200 work-hours × $85 per hour = $17,000 .... 18,724 35,724 3,500,952 

The FAA estimates the following 

costs to do any necessary replacement 

or repair that would be required based 

on the results of the inspection. The 

agency has no way of determining the 

number of aircraft that might need this 

replacement or repair: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace the LPC front case assembly ......................... 140 work-hours × $85 per hour = $11,900 .................. $932,000 $943,900 

Repair the LPC front case assembly ........................... 200 work-hours × $85 per hour = $17,000 .................. 18,724 35,724 

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. 

The FAA is 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 


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Federal Register / Vol. 87, No. 97 / Thursday, May 19, 2022 / Rules and Regulations 30413 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will 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 that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Will not affect intrastate aviation 

in Alaska, and 

(3) 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 Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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: 

2022–09–10 Rolls-Royce Deutschland Ltd & 

Co KG (Type Certificate previously held 

by Rolls-Royce plc): Amendment 39– 

22030; Docket No. FAA–2021–1004; 

Project Identifier MCAI–2021–00480–E. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective June 23, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG (RRD) (Type 

Certificate previously held by Rolls-Royce 

plc) RB211 Trent 875–17, RB211 Trent 877– 

17, RB211 Trent 884–17, RB211 Trent 884B– 

17, RB211 Trent 892–17, RB211 Trent 892B– 

17, and RB211 Trent 895–17 model turbofan 

engines, as identified in EASA AD 2021– 

0114, dated April 23, 2021 (EASA AD 2021– 

0114). 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7230, Turbine Engine Compressor 

Section. 

(e) Unsafe Condition 

This AD was prompted by findings during 

engine overhaul of corrosion on the lowpressure compressor (LPC) front case 

assembly caused by excessive movement 

between the Kevlar wrap and the fan case, 

which resulted in the anti-corrosion paint 

fretting away. The FAA is issuing this AD to 

address corrosion on the LPC front case 

assembly. The unsafe condition, if not 

addressed, could result in reduced integrity 

of the LPC front case assembly during a fan 

blade release, resulting in damage to the 

airplane or reduced control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Except as specified in paragraph (h) of this 

AD: Perform all required actions within the 

compliance times specified in, and in 

accordance with EASA AD 2021–0114. 

(h) Exceptions to EASA AD 2021–0114 

(1) Where EASA AD 2021–0114 requires 

compliance from its effective date, this AD 

requires using the effective date of this AD. 

(2) Where EASA AD 2021–0114 defines a 

qualified shop visit as ‘‘any scheduled shop 

visit where the affected part is exposed and 

substantial rebuild has not yet started, except 

shop visits for serviceability only,’’ for this 

AD replace that phrase with ‘‘the induction 

of an engine into the shop after the effective 

date of this AD for maintenance involving the 

separation of pairs of major mating engine 

flanges, with the exception of the separation 

of engine flanges solely for the purposes of 

transportation of the engine without 

subsequent engine maintenance, which does 

not constitute an engine shop visit.’’ 

(3) Where paragraph (3) of EASA AD 2021– 

0114 specifies ‘‘if, during the inspection as 

required by paragraph (1) of this AD, any 

corrosion is found exceeding the criteria as 

specified in the NMSB, before release to 

service of the engine, contact Rolls-Royce for 

approved repair instructions and accomplish 

those instructions accordingly,’’ for this AD 

replace that phrase with ‘‘remove the affected 

LPC front case assembly from service if 

corrosion is found that exceeds the criteria 

specified in Appendix 2 of the NMSB.’’ In 

lieu of removal of the affected LPC front case 

assembly, operators may repair the affected 

LPC front case assembly using a method 

approved by the Manager, International 

Validation Branch, FAA; or EASA; or RollsRoyce’s EASA Design Organization Approval 

(DOA). If approved by the DOA, the approval 

must include the DOA-authorized signature. 

(4) This AD does not mandate compliance 

with the ‘‘Remarks’’ section of EASA AD 

2021–0114. 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2021–0114 specifies 

to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(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) of this AD. Information may be 

emailed 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 

For more information about this AD, 

contact Nicholas Paine, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7116; email: nicholas.j.paine@faa.gov. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) European Union Aviation Safety Agency 

(EASA) AD 2021–0114, dated April 23, 2021. 

(ii) [Reserved] 

(3) For more information about EASA AD 

2021–0114, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, Germany; 

phone: +49 221 8999 000; email: ADs@

easa.europa.eu. You may find this material 

on the EASA website at https://

ad.easa.europa.eu. 

(4) You may view this material at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 1200 District Avenue, 

Burlington, MA 01803. For information on 

the availability of this material at the FAA, 

call (817) 222–5110. This material may be 

found in the AD docket at https://

www.regulations.gov by searching for and 

locating Docket No. FAA–2021–1004. 

(5) You may view this material that is 

incorporated by reference at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at NARA, email: 

fr.inspection@nara.gov, or go to https://

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on May 13, 2022. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–10755 Filed 5–18–22; 8:45 am] 

BILLING CODE 4910–13–P 


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