Federal Register / Vol. 77, No. 37 / Friday, February 24, 2012 / Proposed Rules 11019 

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 

removing airworthiness directive (AD) 

2011–14–07, Amendment 39–16742 (76 

FR 47056, August 4, 2011), and adding 

the following new AD: 

Pratt & Whitney: Docket No. FAA–2010– 

1095; Directorate Identifier 2009–NE– 

40–AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

AD action by April 24, 2012. 

(b) Affected ADs 

This AD supersedes AD 2011–14–07, 

Amendment 39–16742. 

(c) Applicability 

This AD applies to Pratt & Whitney (PW) 

PW4074 and PW4077 turbofan engines with 

15th stage high-pressure compressor (HPC) 

disks, part number (P/N) 55H615, installed. 

(d) Unsafe Condition 

This AD results from multiple shop 

findings of cracked 15th stage HPC disks. We 

are issuing this AD to prevent cracks from 

propagating into the disk bolt holes, which 

could result in a failure of the 15th stage HPC 

disk, uncontained engine failure, and damage 

to the airplane. 

(e) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. To perform the inspections, use 

paragraph 1.A. or 1.B. of the 

Accomplishment Instructions ‘‘For Engines 

Installed on the Aircraft’’ or 1.A. or 1.B. of 

the Accomplishment Instructions ‘‘For 

Engines Removed from the Aircraft,’’ of PW 

Service Bulletin PW4G–112–72–309, 

Revision 1, dated July 1, 2010. 

(1) For 15th stage HPC disks that have 

9,865 or fewer cycles since new (CSN) on the 

effective date of this AD, remove the disk 

from service before accumulating 12,000 

CSN. 

(2) For 15th stage HPC disks that have 

accumulated more than 9,865 CSN on the 

effective date of this AD, do the following: 

(i) Remove the disk from service at the next 

piece-part exposure, not to exceed 2,135 

cycles-in-service (CIS) after the effective date 

of this AD. 

(ii) Perform a borescope inspection (BSI) or 

eddy current inspection (ECI) of the front rail 

of the disk outer rim according to the 

following schedule: 

(A) Within 2,400 cycles-since-last 

fluorescent penetrant inspection or ECI, or 

(B) Within 1,200 cycles-since-last BSI, or 

(C) Before accumulating 12,000 CSN, or 

(D) Within 55 CIS after the effective date 

of this AD, whichever occurs latest. 

(3) If the BSI from paragraph (e)(2)(ii) of 

this AD indicates the presence of a crack in 

the disk outer rim front rail, but you cannot 

visually confirm a crack, perform an ECI 

within 5 CIS after the BSI. 

(4) If you confirm a crack in the front rail 

of the disk outer rim using any inspection 

method, remove the disk from service before 

further flight. 

(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. 

(g) Related Information 

(1) For more information about this AD, 

contact Ian Dargin, Aerospace Engineer, 

Engine Certification Office, FAA, 12 New 

England Executive Park, Burlington, MA 

01803; phone: (781) 238–7178; fax: (781) 

238–7199; email: ian.dargin@faa.gov. 

(2) Pratt & Whitney Service Bulletin 

PW4G–112–72–309 Revision 1, dated July 1, 

2010, pertains to the subject of this AD. 

Contact Pratt & Whitney, 400 Main St., East 

Hartford, CT 06108; phone: 860–565–7700; 

fax: 860–565–1605, for a copy of this service 

information. 

(3) You may review copies of the 

referenced service information at the FAA, 

Engine & Propeller Directorate, 16 New 

England Executive Park, Burlington, MA. For 

information on the availability of this 

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

Issued in Burlington, Massachusetts, on 

February 15, 2012. 

Peter A. White, 

Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–4286 Filed 2–23–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0008; Directorate 

Identifier 2011–NE–43–AD] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG 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 certain 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) BR700–715A1–30, BR700– 

715B1–30, and BR700–715C1–30 

turbofan engines. This proposed AD was 

prompted by the discovery of a 

manufacturing defect on certain part 

number (P/N) and serial number (S/N) 

low-pressure (LP) compressor booster 

rotors. This proposed AD would require 

initial and repetitive fluorescent 

penetrant inspections of certain P/N and 

S/N LP compressor booster rotors and 

rework or replacement of them as 

terminating action to the repetitive 

inspections. We are proposing this AD 

to prevent failure of the LP compressor 

booster rotor, uncontained engine 

failure, and damage to the airplane. 

DATES: We must receive comments on 

this proposed AD by April 24, 2012. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov and follow 

the instructions for sending your 

comments electronically. 

• Mail: Docket Management Facility, 

U.S. Department of Transportation, 1200 

New Jersey Avenue SE., West Building 

Ground Floor, Room W12–140, 

Washington, DC 20590–0001. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

• Fax: (202) 493–2251. 

For service information identified in 

this proposed AD, contact Rolls-Royce 

Deutschland Ltd & Co KG, Eschenweg 

11, Dahlewitz, 15827 BlankenfeldeMahlow, Germany, telephone: +49 (0) 

33–7086–1883, fax: +49 (0) 33–7086– 

3276. You may review copies of the 

referenced 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. 

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11020 Federal Register / Vol. 77, No. 37 / Friday, February 24, 2012 / Proposed Rules 

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 proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Operations 

office (phone: 800–647–5527) is the 

same as the Mail address provided in 

the ADDRESSES section. Comments will 

be available in the AD docket shortly 

after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Mark Riley, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7758; fax: 781–238– 

7199; email: mark.riley@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2012–0008; Directorate Identifier 

2011–NE–43–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on 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 with FAA 

personnel concerning this proposed AD. 

Using the search function of the Web 

site, anyone can find and read the 

comments in any of our dockets, 

including, if provided, the name of the 

individual who sent the comment (or 

signed the comment on behalf of an 

association, business, labor union, etc.). 

You may review the DOT’s complete 

Privacy Act Statement in the Federal 

Register published on April 11, 2000 

(65 FR 19477–78). 

Discussion 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Community, has issued EASA 

Airworthiness Directive 2011–0232, 

dated December 13, 2011 (referred to 

after this as ‘‘the MCAI’’), to correct an 

unsafe condition for the specified 

products. The MCAI states: 

Several LP compressor booster rotors have 

been found non-compliant to original design. 

The technical investigations carried out by 

Rolls-Royce Deutschland revealed that this 

discrepancy is due to a manufacturing defect 

and that only some specific LP compressor 

booster rotor serial numbers are affected. 

This condition, if not corrected, could lead 

to an uncontained engine failure, potentially 

damaging the aeroplane and injuring its 

occupants, and/or injuring persons on the 

ground. 

To address this condition, RRD has 

developed an inspection program and a 

rework for the affected LP compressor 

booster rotors. 

For the reason described above, depending 

on engine type of operations, this AD 

requires repetitive fluorescent penetrant 

inspections of the LP compressor booster 

rotor and if any crack is found, replacement 

with a serviceable part. This AD also requires 

rework of all affected LP compressor booster 

rotors. 

You may obtain further information 

by examining the MCAI in the AD 

docket. 

Relevant Service Information 

RRD has issued Alert Service Bulletin 

No. SB–BR700–72–A900503, Revision 

4, dated June 16, 2011, and RRD SB No. 

SB–BR700–72–101683, dated September 

20, 2010. The actions described in this 

service information are intended to 

correct the unsafe condition identified 

in the MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

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 

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. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 96 engines installed on 

airplanes of U.S. registry. We also 

estimate that it would take about 5 

work-hours per engine to perform one 

inspection, and about 8 work-hours per 

engine to perform the rework. The 

average labor rate is $85 per work-hour. 

Based on these figures, if all engines are 

reworked, we estimate the cost of the 

proposed AD on U.S. operators to 

perform one inspection and to perform 

the rework to be $106,080. 

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 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); 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 proposed AD and placed it in the 

AD docket. 

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: 

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Federal Register / Vol. 77, No. 37 / Friday, February 24, 2012 / Proposed Rules 11021 

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

§ 39.13 [Amended] 

2. The FAA amends § 39.13 by adding 

the following new AD: 

Rolls-Royce Deutschland Ltd & Co KG: 

Docket No. FAA–2012–0008; Directorate 

Identifier 2011–NE–43–AD. 

(a) Comments Due Date 

We must receive comments by April 24, 

2012. 

(b) Affected Airworthiness Directives (ADs) 

None. 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG (RRD) BR700– 

715A1–30, BR700–715B1–30, and BR700– 

715C1–30 turbofan engines, with a lowpressure (LP) compressor booster rotor, part 

number (P/N) BRH19215, or P/N BRH19871, 

with serial numbers 118 to 255 inclusive, 

installed. 

(d) Reason 

This AD was prompted by the discovery of 

a manufacturing defect on certain P/N and S/ 

N LP compressor booster rotors. We are 

issuing this AD to prevent failure of the LP 

compressor booster rotor, uncontained 

engine failure, and damage to the airplane. 

(e) Actions and Compliance 

Unless already done, do the following 

actions. 

(1) At the applicable compliance time in 

Table 1 of this AD, perform an initial 

fluorescent penetrant inspection (FPI) of the 

LP compressor booster rotor, in accordance 

with paragraphs 3.D. through 3.H.(3) of 

Accomplishment Instructions of RRD Alert 

Service Bulletin (ASB) No. SB–BR700–72– 

A900503, Revision 4, dated June 16, 2011. 

TABLE 1—COMPLIANCE TIMES

Engine type of operation Initial FPI (whichever occurs later) Repetitive FPI interval 

(not to exceed) 

‘‘Hawaiian’’ Flight Mission only ......................................... Before accumulating 36,000 engine cycles (EC) or within 500 EC after the effective date of this AD.6,000 EC. 

Any other rating, or combination of ratings ...................... Before accumulating 18,000 EC, or within 500 EC after 

the effective date of this AD.

4,000 EC. 

(2) Thereafter, at intervals not to exceed the 

applicable compliance time in Table 1 of this 

AD, perform repetitive FPIs of the LP 

compressor booster rotor, in accordance with 

paragraphs 3.D. through 3.H.(3) of 

Accomplishment Instructions of RRD ASB 

No. SB–BR700–72–A900503, Revision 4, 

dated June 16, 2011. 

(3) Remove cracked LP compressor booster 

rotors before further flight. 

(4) At the next piece part exposure of the 

LP compressor booster rotor during shop 

visit, remove the LP compressor booster rotor 

and either: 

(i) Rework the LP compressor booster rotor 

in accordance with paragraphs 3.A. through 

3.F. of Accomplishment Instructions of RRD 

Service Bulletin No. SB–BR700–72–101683, 

dated September 20, 2010; or 

(ii) Replace the LP compressor booster 

rotor with one that is eligible for installation. 

(f) Definition 

(1) For the purpose of this AD, an LP 

compressor booster rotor that is eligible for 

installation is one that is not listed in 

applicability paragraph (c) of this AD. 

(2) The Hawaiian Flight Mission referenced 

in Table 1 of this AD is defined in RRD 

BR715 Time Limits Manual, T–715–3BR, 

Section 05–00, Task 05–00–02–800–001, 

Hawaiian Flight Mission Profile, Figure 05– 

00–02–990–008 (Fig. 8). 

(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. 

(h) Related Information 

(1) For more information about this AD, 

contact Mark Riley, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

phone: 781–238–7758; fax: 781–238–7199; 

email: mark.riley@faa.gov. 

(2) Refer to MCAI EASA Airworthiness 

Directive 2011–0232, dated December 13, 

2011; RRD Alert ASB No. SB–BR700–72– 

A900503, Revision 4, dated June 16, 2011; 

and RRD SB No. SB–BR700–72–101683, 

dated September 20, 2010, 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, telephone: 

+49 (0) 33–7086–1883, fax: +49 (0) 33–7086– 

3276. You may review copies of the 

referenced 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. 

Issued in Burlington, Massachusetts, on 

February 13, 2012. 

Peter A. White, 

Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–4287 Filed 2–23–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF LABOR 

Wage and Hour Division 

29 CFR Part 552 

RIN 1235–AA05 

Application of the Fair Labor 

Standards Act to Domestic Service 

AGENCY: Wage and Hour Division, 

Labor. 

ACTION: Notice and extension of 

comment period. 

SUMMARY: This document extends the 

period for filing written comments for 

an additional 14 days on the proposed 

revisions to the Application of the Fair 

Labor Standards Act to Domestic 

Service published on December 27, 

2011. The Department of Labor 

(Department) is taking this action in 

order to provide interested parties 

additional time to submit comments. 

DATES: The agency must receive 

comments on or before March 12, 2012. 

The period for public comments, which 

was to close on February 27, 2012, will 

be extended to March 12, 2012. 

ADDRESSES: You may submit comments, 

identified by RIN 1235–AA05, by either 

one of the following methods: 

Electronic comments: through the 

Federal eRulemaking Portal: http:// 

www.regulations.gov. Follow the 

instructions for submitting comments. 

Mail: Mary Ziegler, Director, Division 

of Regulations, Legislation and 

Interpretation, Wage and Hour Division, 

U.S. Department of Labor, Room S– 

3502, 200 Constitution Avenue NW., 

Washington, DC 20210. 

Instructions: Please submit one copy 

of your comments by only one method. 

All submissions received must include 

the agency name (Wage and Hour 

Division) and Regulatory Information 

Number identified above for this 

rulemaking (1235–AA05). All comments 

received will be posted without change 

to http://www.regulations.gov, including 

any personal information provided. 

Consequently, prior to including any 

individual’s personal information such 

as Social Security Number, home 

address, telephone number, email 

addresses and medical data in a 

comment, the Department urges 

commenters carefully to consider that 

their submissions are a matter of public 

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