[Docket No. FAA-2012-1331; Directorate Identifier 2012-NE-44-AD; Amendment 

39-18390; AD 2016-03-03] RIN 2120-AA64 

Ainvorthiness Directives; Rolls-Royce plc Turbojet Engines 

AGENCY: Federal Aviation Administration (FAA), DOT. ACTION: Final rule. 

SUMMARY: We are superseding airworthiness directive (AD) 2013-11-13 for all RollsRoyce pic (RR) Viper Mk. 601-22 turbojet engines. AD 2013-11-13 required reducing 

the life of certain critical parts. This AD adds two new engine models and additional 

engine parts to the applicability. This AD was prompted by a determination by RR that 

additional parts for the RR Viper Mk. 601-22 as well as additional engine models are 

affected. We are issuing this AD to prevent failure of life-limited parts, which could lead 

to an uncontained part release, damage to the engine, and damage to the airplane. 

DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. 

The Director of the Federal Register approved the incorporation by reference of 

certain publication listed in this AD as of [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION TN THE FEDERAL REGISTER]. 
information at the FAA, Engine & Propeller Directorate, 1200 District A venue, 

Burlington, MA. For infom1ation on the availability ofthis material at the FAA, call 781-

238-7125. It is also available on the Internet at http://www.regulations.gov by searching 

for and locatlng Docket No. F AA-2012-1331. 

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. F AA-20 12-1331; or in person at the Docket 

Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal 

holidays. The AD docket contains this AD, the mandatory continuing airworthiness 

information, regulatory evaluation, any comments received, and other information. The 

address for the Docket Office (phone: 800-647-5527) is Document Management Facility, 

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: Philip Haberlen, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District A venue, 

Burlington, MA 0 1803; phone: 781-238-7770; fax: 781-238-7199; email: 

philip.haberlen@faa.gov. 

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2013-11-13"). AD 2013-11-13 applied to the specified products. The NPRM published in 

the Federal Register on October 9, 2015 (80 FR 61131 ). The NPRM proposed to continue 

to require reducing the life of certain critical parts. That NPRM also proposed to add 

additional parts for the RR Viper Mk. 601-22 as well as additional engine models to the 

applicability of this AD. 

Comments 

We gave the public the opportunity to participate in developing this AD. We 

received no comments on the NPRM (80 FR 61131, October 9, 2015). 

Conclusion 

We reviewed the relevant data and determined that air safety and the public 

interest require adopting this AD as proposed except for minor editorial changes. We 

have determined that these minor changes: 

• Are consistent with the intent that was proposed in the NPRM (80 FR 61 1 31 , 

October 9, 2015) for correcting the unsafe condition; and 

• Do not add any additional burden upon the public than was already proposed 

in the NPRM (80 FR 61131, October 9, 201 5). 

Related Service Information under 1 CFR Part 51 

RR has issued RR Alert Service Bulletin (ASB) Mk. 521 Number 72-A408, 

Circulation A, dated January 20 15; RR ASB Mk. 521 Number 72-A408, Circulation B, 

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determining their respective new life limit. 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 of this final rule. 

Costs of Compliance 

We estimate that this AD affects about 46 engines installed on airplanes of U.S. 

registry. We estimate a pro-rated parts cost of$66,000 per engine. We also estimate that 

it will take about 4 hours per engine to comply with this AD. The average labor rate is 

$85 per hour. Based on these figures, we estimate the cost of this AD on U.S. operators to 

be $3,051,640. 

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 lll, 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 

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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) Is not a "significant rule" under DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), 

(3) Will not affect intrastate aviation in Alaska to the extent that it justifies 

making a regulatory distinction, 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. 

Adoption of the Amendment 

Accordingly, under the authority delegated to me by the Administrator, the FAA 

amends part 39 ofthe Federal Aviation Regulations (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. l06(g), 40113,44701. 

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2016-03-03 Rolls-Royce pic (Type Certificate previously held by Rolls-Royce (1971) 

Limited, Bristol Engine Division): Amendment 39-18390; Docket No. FAA-2012-1331; 

Directorate Identifier 2012-NE-44-AD. 

(a) Effective Date 

This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

(b) Affected ADs 

This AD supersedes AD 2013-11-13. 

(c) Applicability 

This AD applies to all Rolls-Royce plc (RR) Viper Mk. 521, Viper Mk. 522, and 

Viper Mk. 601-22 turbojet engines. 

(d) Unsafe Condition 

This AD was prompted by a review by RR of the lives of certain critical parts. We 

are issuing this AD to prevent failure of life-limited parts, which could lead to an 

uncontained part release, damage to the engine, and damage to the airplane. 

(e) Compliance 

Comply with this AD within the compliance times specified, unless already done. 

(1) Within 30 days after the effective date of this AD, or before any affected part 

exceeds its new revised life limit, whichever occurs later, remove any affected engine 

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2015; and RR ASB Mk 601-22 Number 72-A207, dated January 2015, to identify the 

affected parts installed on each engine and detetmine their respective new life limits. 

(2) For the RR Viper Mk. 601-22 turbojet engine, remove compressor shaft, part 

number V900766, from service before the compressor shaft accumulates 20,720 flight 

cycles since new. 

(3) Replace any part identified in paragraph (e)(l) or (e)(2) of this AD with a part 

eligible for installation before the affected part reaches its new life limit specified in 

paragraph (e)(2) of this AD or in the ASBs referenced in paragraph (e)(l) of this AD. 

(f) Installation Prohibition 

After the effective date of this AD, do not install any affected part identified in 

paragraph (e) of this AD into any engine, nor return any engine to service with any 

affected part identified in paragraph (e) of this AD installed, if any affected part exceeds 

the life limit specified in the appropriate ASB identified in paragraph (e)(l) ofthis AD 

and/or the life limit identified in paragraph (e)(2) ofthis AD. 

(g) Alternative Methods of Compliance (AMOCs) 

The Manager, Engine Certification Office, may approve AMOCs for this AD. Use 

the procedures found in 14 CFR 39.19 to make your request. You may email your request 

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

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email: philip.haberlen@faa.gov. 

(2) Refer to MCAI European Aviation Safety Agency AD 2015-0127R 1, dated 

August 14,2015, 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 Docket No. 

F AA-2012-1331. 

(i) 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) Rolls-Royce pic (RR) Alert Service Bulletin (ASB) Mk. 521 Number 72-

A408, Circulation A, dated January 2015. 

(ii) RR ASB Mk. 521 Number 72-A408, Circulation B, dated January 2015. 

(iii) RR ASB Mk. 522 Number 72-A413, Circulation A, dated January 2015. 

(iv) RR ASB Mk. 522 Number 72-A412, Circulation B, dated January 2015. (v) RR ASB Mk 601-22 Number 72-A207, dated January 2015. 

(3) For RR service information identified in this AD, contact DA Services 

Operations Room at Rolls-Royce plc, Defense Sector Bristol, WH-70, P .0. Box 3, Filton, 

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this material at the FAA, call 7 81-23 8-7125. 

(5) You may view this service information at the National Archives and Records 

Administration (NARA). For information on the availability of this material at NARA, 

call 202-741 -6030, or go to: http://www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Burlington, Massachusetts, on February 2, 2016. 

(]_ 

Ann C. Mollica, 

Acting Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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