Federal Register / Vol. 75, No. 192 / Tuesday, October 5, 2010 / Rules and Regulations 61343 

Group, ATTN: DOT/FAA Southwest Region, 

Mark Wiley, ASW–111, Aviation Safety 

Engineer, Rotorcraft Directorate, Regulations 

and Policy Group, 2601 Meacham Blvd., Fort 

Worth, Texas 76137, telephone (817) 222– 

5114, fax (817) 222–5961, has the authority 

to approve AMOCs for this AD, if requested, 

using the procedures found in 14 CFR 39.19. 

Related Information 

(h) EASA MCAI AD No. 2009–0137, dated 

June 23, 2009, contains related information. 

Joint Aircraft System/Component (JASC) 

Code 

(i) The JASC Code is 2460: Electrical Power 

Systems. 

Material Incorporated by Reference 

(j) You must use the specified portions of 

Agusta Mandatory Bollettino Tecnico No. 

109EP–98, dated June 22, 2009, to do the 

actions required. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Agusta, Via Giovanni 

Agusta, 520 21017 Cascina Costa di Samarate 

(VA), Italy, telephone 39 0331–229111, fax 39 

0331–229605/222595, or at http:// 

customersupport.agusta.com/ 

technical_advice.php. 

(3) You may review copies at the FAA, 

Office of the Regional Counsel, Southwest 

Region, 2601 Meacham Blvd., Fort Worth, 

Texas 76137; or 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/ibr-locations.html. 

Issued in Fort Worth, Texas, on September 

22, 2010. 

Mark R. Schilling, 

Acting Manager, Rotorcraft Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–24723 Filed 10–4–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0301; Directorate 

Identifier 2009–NE–22–AD; Amendment 39– 

16457; AD 2010–20–22] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG (RRD) 

Models Tay 620–15, Tay 650–15, and 

Tay 651–54 Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

Following a review of operational data of 

the Tay 651–54 engine, it has been found that 

the actual stress levels in the Tay 651–54 

engine High Pressure Compressor (HPC) 

stages 1, 3, 6, 7 and 12 discs were higher than 

those originally assumed and therefore the 

approved lives needed to be reduced. 

We are issuing this AD to prevent HPC 

stages 1, 3, 6, 7, and 12 discs from 

exceeding the approved reduced life 

limits, which could result in an 

uncontained failure of a disc and 

damage to the airplane. 

DATES: This AD becomes effective 

November 9, 2010. The Director of the 

Federal Register approved the 

incorporation by reference of certain 

publications listed in this AD as of 

November 9, 2010. 

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: Tara 

Chaidez, Aerospace Engineer, Engine 

Certification Office, FAA, Engine and 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: tara.chaidez@faa.gov; telephone 

(781) 238–7773; 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 March 25, 2010 (75 FR 

14379). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states that: 

Following a review of operational data of 

the Tay 651–54 engine, it has been found that 

the actual stress levels in the Tay 651–54 

engine High Pressure Compressor (HPC) 

stages 1, 3, 6, 7 and 12 discs were higher than 

those originally assumed and therefore the 

approved lives needed to be reduced. 

As Tay 651–54 service run HPC discs may 

be installed on Tay 620–15 and Tay 650–15 

engine models, it is necessary to reduce the 

maximum approved lives of the affected HPC 

disc serial numbers installed on Tay 620–15 

and Tay 650–15 engines as well. 

The approved lives of the affected HPC 

stages 1, 3, 6, 7 and 12 discs specified in this 

Airworthiness Directive supersede the 

approved lives given in the Time Limits 

Manuals, Chapter 05–10–01. 

Exceeding of the approved life limits could 

potentially result in non-contained disc 

failure. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD would affect about 

10 products of U.S. registry. We also 

estimate that it would take about 1 

work-hours per product to comply with 

this AD. The average labor rate is $85 

per work-hour. Required parts would 

cost about $100,000 per product. Based 

on these figures, we estimate the cost of 

the AD on U.S. operators to be 

$1,000,850. 

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: 


emcdonald on DSK2BSOYB1PROD with RULES
61344 Federal Register / Vol. 75, No. 192 / Tuesday, October 5, 2010 / Rules and Regulations 

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: 

2010–20–22 Rolls-Royce Deutschland Ltd & 

Co KG (Formerly Rolls-Royce plc): 

Amendment 39–16457. Docket No. 

FAA–2010–0301; Directorate Identifier 

2009–NE–22–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective November 9, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG (RRD) models Tay 

620–15, Tay 650–15, and Tay 651–54 

turbofan engines. These engines are installed 

on, but not limited to, Fokker F28 Mark 0070 

and Mark 0100 airplanes and Boeing 727 

series airplanes. 

Reason 

(d) Following a review of operational data 

of the Tay 651–54 engine, it has been found 

that the actual stress levels in the Tay 651– 

54 engine High Pressure Compressor (HPC) 

stages 1, 3, 6, 7 and 12 discs were higher than 

those originally assumed and therefore the 

approved lives needed to be reduced. 

We are issuing this AD to prevent HPC stages 

1, 3, 6, 7, and 12 discs from exceeding the 

approved reduced life limits, which could 

result in an uncontained failure of a disc and 

damage to the airplane. 

Actions and Compliance 

(e) Unless already done, within 30 days 

after the effective date of this AD, amend the 

approved Airworthiness Limitation Section 

to incorporate the new, reduced life limits as 

follows: 

For Tay 651–54 Engines 

(1) The maximum approved lives (MAL) of 

the High Pressure Compressor (HPC) rotor 

discs are reduced to the MALs specified in 

the following Table 1 of this AD: 

TABLE 1—TAY 651–54 ENGINE REDUCED DISC MAL BY PART NUMBER

For Part No. The MAL is 

(i) HPC Stage 1 Disc ................................................................................................................... JR18049 ...................... 18,800 cycles. 

(ii) HPC Stage 3 Disc ................................................................................................................... JR18743 ...................... 18,100 cycles. 

(iii) HPC Stage 6 Disc .................................................................................................................. JR18748 ...................... 19,300 cycles. 

(iv) HPC Stage 7 Disc .................................................................................................................. JR17365 ...................... 17,300 cycles. 

(v) HPC Stage 12 Disc ................................................................................................................ JR31928 ...................... 18,900 cycles. 

For Tay 620–15 and Tay 650–15 Engines 

(2) The MAL of certain HPC rotor discs are 

reduced. The affected disc serial numbers 

and the reduced MAL are defined in RollsRoyce Deutschland Ltd & Co KG Alert NonModification Service Bulletin TAY–72– 

A1740, dated February 11, 2009. 

(3) Thereafter, except as provided in 

paragraph (f) of this AD, no alternative 

replacement times may be approved for these 

parts. 

Other FAA AD Provisions 

(f) Alternative Methods of Compliance 

(AMOCs): The Manager, Engine Certification 

Office, FAA, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. 

Related Information 

(g) Refer to mandatory continuing 

airworthiness information European Aviation 

Safety Agency Airworthiness Directive 2009– 

0092, dated April 17, 2009, for related 

information. 

(h) Contact Tara Chaidez, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: tara.chaidez@faa.gov; 

telephone (781) 238–7773; fax (781) 238– 

7199, for more information about this AD. 

Material Incorporated by Reference 

(i) You must use Rolls-Royce Deutschland 

Ltd & Co KG Alert Non-Modification Service 

Bulletin TAY–72–A1740, dated February 11, 

2009, to do the actions required by this AD, 

unless the AD specifies otherwise. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Rolls-Royce Deutschland Ltd 

& Co KG; Eschenweg 11, D–15827 

Blankenfelde-Mahlow, Germany; telephone 

+49 (0) 33 7086 1768; fax +49 (0) 33 7086 

3356. 

(3) You may review copies at the FAA, 

New England Region, 12 New England 

Executive Park, Burlington, MA; or 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 

September 24, 2010. 

Francis A. Favara, 

Manager, Engine and Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2010–24607 Filed 10–4–10; 8:45 am] 

BILLING CODE 4910–13–P 


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