Federal Register / Vol. 78, No. 54 / Wednesday, March 20, 2013 / Rules and Regulations 17079 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–1167; Directorate 

Identifier 2012–NE–36–AD; Amendment 39– 

17396; AD 2013–06–01] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) models Tay 620–15 and Tay 650– 

15 turbofan engines. This AD was 

prompted by RRD recalculating the 

Declared Safe Cyclic Life (DSCL) for 

certain low-pressure compressor (LPC) 

rotor disc assemblies operating to the 

Plan D Flight Mission. This AD requires 

removing the affected LPC rotor disc 

assemblies at a new lower recalculated 

DSCL. We are issuing this AD to prevent 

failure of the LPC rotor disc assembly, 

uncontained engine failure, and damage 

to the airplane. 

DATES: This AD becomes effective April 

24, 2013. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 1200 New Jersey 

Avenue SE., West Building Ground 

Floor, Room W12–140, Washington, DC 

20590–0001. 

FOR FURTHER INFORMATION CONTACT: 

Frederick Zink, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7779; fax: 781–238– 

7199; email: Frederick.zink@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on December 13, 2012 (77 FR 

74123). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The Mandatory Continuing 

Airworthiness Information states: 

The Tay 650–15 and Tay 650–15/10 engine 

Time Limits Manual Chapter 05–10–01 

contains maximum approved life limitations, 

identified as Declared Safe Cyclic Life 

(DSCL) for Low Pressure Compressor (LPC) 

rotor disc assemblies Part Number (P/N) 

JR31198A and P/N JR34563A operated to the 

Plan D Flight Mission, which has been 

recalculated to a lower value. 

Decreased DSCL of LPC rotor disc 

assemblies P/N JR31198A and P/N JR34563A 

may affect these disc assemblies installed in 

Tay 650–15 and Tay 650–15/10 engines as 

well as in Tay 620–15 and Tay 620–15/20 

engines. 

Failure to take decreased DSCL of affected 

LPC rotor disc assemblies into account could 

lead to affected part failure and consequent 

release of high energy debris potentially 

resulting in damage to, and/or reduced 

control of, the aeroplane. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM 

(77 FR 74123, December 13, 2012). 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed (77 FR 74123, December 13, 

2012). 

Costs of Compliance 

We estimate that this AD will affect 

four engines installed on airplanes of 

U.S. registry. We also estimate that it 

will require four hours to perform the 

actions required by this AD. The average 

labor rate is $85 per hour. Prorated life 

for the disc assembly is approximately 

$650 per disc. Based on these figures, 

we estimate the cost of this AD on U.S. 

operators to be $3,960. 

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. 

Regulatory Findings 

We determined that 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 this AD: 

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); 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. 

We prepared a regulatory evaluation 

of the estimated costs to comply with 

this AD and placed it in the AD docket. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; 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 AD, the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Operations office (phone: 

800–647–5527) is provided in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

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 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 AD: 

2013–06–01 Rolls-Royce Deutschland Ltd & 

Co KG (RRD) (formerly Rolls-Royce plc): 

Docket No. FAA–2012–1167; Directorate 

Identifier 2012–NE–36–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective April 24, 2013. 

(b) Affected ADs 

None. 


wreier-aviles on DSK5TPTVN1PROD with RULES
17080 Federal Register / Vol. 78, No. 54 / Wednesday, March 20, 2013 / Rules and Regulations 

(c) Applicability 

This AD applies to RRD models Tay 620– 

15 and Tay 650–15 turbofan engines with a 

low-pressure compressor (LPC) rotor disc 

assembly, part number (P/N) JR31198A or 

P/N JR34563A, installed. 

(d) Reason 

This AD was prompted by RRD 

recalculating the Declared Safe Cyclic Life for 

certain LPC rotor disc assemblies operating to 

the Plan D Flight Mission. We are issuing this 

AD to prevent failure of the LPC rotor disc 

assembly, uncontained engine failure, and 

damage to the airplane. 

(e) Actions and Compliance 

Unless already done, do the following. For 

engines that have operated to the Plan D 

Flight Mission configuration, remove the LPC 

rotor disc assembly from service before 

accumulating 18,700 engine flight cycles. Do 

not return to service nor approve for return 

to service any engine with the affected discs 

installed that exceeds 18,700 engine flight 

cycles. 

(f) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Engine Certification Office, 

FAA, may approve AMOCs for this AD. Use 

the procedures found in 14 CFR 39.19 to 

make your request. 

(g) Related Information 

(1) For more information about this AD, 

contact Frederick Zink, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7779; fax: 781–238–7199; 

email: Frederick.zink@faa.gov. 

(2) Refer to European Aviation Safety 

Agency AD 2012–0204, dated October 1, 

2012, and RRD Alert Service Bulletin TAY– 

72–A1772, dated August 9, 2012, for related 

information. 

(3) For service information identified in 

this AD, contact Rolls-Royce Deutschland Ltd 

& Co KG, Eschenweg 11 Dahlewitz 15827, 

Blankenfelde-Mahlow, Germany; phone: +49 

0 33–7086–1944; fax: +49 0 33–7086–3276. 

(4) You may view this service information 

at the FAA, Engine & Propeller Directorate, 

12 New England Executive Park, Burlington, 

MA. For information on the availability of 

this material at the FAA, call 781–238–7125. 

(h) Material Incorporated by Reference 

None. 

Issued in Burlington, Massachusetts, on 

March 8, 2013. 

Colleen M. D’Alessandro, 

Acting Manager, Engine & Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–06115 Filed 3–19–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–1100; Directorate 

Identifier 2012–NE–29–AD; Amendment 39– 

17385; AD 2013–05–13] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) BR700–710 series turbofan 

engines. This AD requires replacement 

of the affected fuel pump splined 

couplings. This AD was prompted by 

service experience that demonstrated 

premature wear of the splined coupling 

on the fuel pump. We are issuing this 

AD to prevent failure of the engine and 

loss of the airplane. 

DATES: This AD becomes effective April 

24, 2013. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 1200 New Jersey 

Avenue SE., West Building Ground 

Floor, Room W12–140, Washington, DC 

20590–0001. 

FOR FURTHER INFORMATION CONTACT: 

Frederick Zink, Aerospace Engineer, 

Engine Certification Office, FAA, Engine 

& Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

email: frederick.zink@faa.gov; phone: 

781–238–7779; fax: 781–238–7199. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to include an AD that would 

apply to the specified products. That 

NPRM was published in the Federal 

Register on November 7, 2012 (77 FR 

66771). That NPRM proposed to require 

replacement of the affected fuel pump 

splined couplings. The Mandatory 

Continuing Airworthiness Information 

states: 

In-service experience of RRD BR700–710 

fuel pump installed on the rear face of the 

accessory gearbox identified premature wear 

of the splined coupling, which caused 

damage to the splined coupling. 

This condition, if not corrected, could lead 

to failure of engine fuel supply, likely 

resulting in an uncommanded in-flight 

shutdown and consequently reduced control 

of the aeroplane. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

considered the comment received. 

Request To Withdraw the AD 

An anonymous commenter requested 

that the FAA withdraw the proposed 

rule (77 FR 66771, November 7, 2012). 

The commenter indicated that the rule 

is a ‘‘waste of government resources’’ 

because a service bulletin has been 

issued and larger companies and 

individuals will comply because it is in 

their best interest while smaller 

companies will ‘‘suffer.’’ 

We do not agree. We reviewed the 

service experience of the affected fuel 

pump splined couplings and 

determined that an unsafe condition 

exists and that corrective action is 

required. Although some operators may 

take corrective action based on the 

service bulletin, the issuance of an AD 

makes compliance mandatory for all. 

We made no change to the AD. 

Change to Installation Prohibition 

Paragraph 

We determined when reviewing the 

proposed rule (77 FR 66771, November 

7, 2012), that the Installation 

Prohibition paragraph (g) was not 

consistent with the compliance 

paragraph (e). The Installation 

Prohibition paragraph in the NPRM 

forbids returning to service any engine 

with a fuel pump with an affected 

splined coupling that has accumulated 

4,000 hours time in service (TIS). This 

prohibition is not consistent with 

compliance paragraph (e) which allows 

engines with affected spline couplings 

to be returned to service for those 

engines with 3,750 hours or more TIS, 

while allowing an additional 250 hours 

TIS to comply. The Installation 

Prohibition paragraph should have been 

directed against ‘‘installing’’ an affected 

fuel pump into an engine or installing 

an engine with an affected fuel pump 

into an aircraft rather than against 

returning an engine to service with an 

affected fuel pump. 

The Installation Prohibition paragraph 

now reads: ‘‘After the effective date of 

this AD, do not install into any engine 

a fuel pump with an affected splined 

coupling that has accumulated 4,000 

hours TIS, or install any engine with an 

affected splined coupling that has 

accumulated 4,000 hours TIS onto an 

airplane.’’ 


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