Federal Register / Vol. 77, No. 37 / Friday, February 24, 2012 / Proposed Rules 11017 

SMALL BUSINESS SIZE STANDARDS BY NAICS INDUSTRY

NAICS codes NAICS U.S. industry title Size standards in 

millions of dollars 

Size standards in 

number of 

employees 

*******

621420 ........................................ Outpatient Mental Health and Substance Abuse Centers ............. $14.0 ................................

621491 ........................................ HMO Medical Centers .................................................................... 30.0 ................................

621492 ........................................ Kidney Dialysis Centers ................................................................. 35.5 ................................

621493 ........................................ Freestanding Ambulatory Surgical and Emergency Centers ......... 14.0 ................................

621498 ........................................ All Other Outpatient Care Centers ................................................. 19.0 ................................

621511 ........................................ Medical Laboratories ...................................................................... 30.0 ................................

621512 ........................................ Diagnostic Imaging Centers ........................................................... 14.0 ................................

621610 ........................................ Home Health Care Services .......................................................... 14.0 ................................

621910 ........................................ Ambulance Services ....................................................................... 14.0 ................................

621991 ........................................ Blood and Organ Banks ................................................................. 30.0 ................................

621999 ........................................ All Other Miscellaneous Ambulatory Health Care Services .......... 14.0 ................................

Subsector 622—Hospitals 

*******

622110 ........................................ General Medical and Surgical Hospitals ........................................ 35.5 ................................

622210 ........................................ Psychiatric and Substance Abuse Hospitals ................................. 35.5 ................................

622310 ........................................ Specialty (except Psychiatric and Substance Abuse) Hospitals ... 35.5 ................................

Subsector 623—Nursing and Residential Care Facilities 

623110 ........................................ Nursing Care Facilities ................................................................... 25.5 ................................

623210 ........................................ Residential Mental Retardation Facilities ....................................... 14.0 ................................

623220 ........................................ Residential Mental Health and Substance Abuse Facilities .......... 14.0 ................................

623311 ........................................ Continuing Care Retirement Communities .................................... 25.5 ................................

623312 ........................................ Homes for the Elderly .................................................................... 10.0 ................................

623990 ........................................ Other Residential Care Facilities ................................................... 10.0 ................................

Subsector 624—Social Assistance 

*******

624110 ........................................ Child and Youth Services ............................................................... 10.0 ................................

624120 ........................................ Services for the Elderly and Persons with Disabilities .................. 10.0 ................................

624190 ........................................ Other Individual and Family Services ............................................ 10.0 ................................

624210 ........................................ Community Food Services ............................................................. 10.0 ................................

624221 ........................................ Temporary Shelters ........................................................................ 10.0 ................................

624229 ........................................ Other Community Housing Services .............................................. 14.0 ................................

624230 ........................................ Emergency and Other Relief Services ........................................... 30.0 ................................

624310 ........................................ Vocational Rehabilitation Services ................................................. 10.0 ................................

* * * * * * * 

Dated: December 21, 2011. 

Karen G. Mills, 

Administrator. 

[FR Doc. 2012–4329 Filed 2–23–12; 8:45 am] 

BILLING CODE 8025–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–1095; Directorate 

Identifier 2009–NE–40–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney (PW) Models PW4074 and 

PW4077 Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to supersede an 

existing airworthiness directive (AD) 

that applies to all PW PW4074 and 

PW4077 turbofan engines. The existing 

AD currently requires removing the 15th 

stage high pressure compressor (HPC) 

disk within 12,000 cycles since new 

(CSN) or using a drawdown removal 

plan for disks that exceed 12,000 CSN. 

Since we issued that AD, we received a 

request from an operator that we clarify 

our inspection schedule for 15th stage 

HPC disks. This proposed AD would 

clarify that 15th stage HPC disks that 

have accumulated more than 9,685 CSN 

require a borescope inspection (BSI) or 

eddy current inspection (ECI) of the disk 

outer rim front rail for cracks prior to 

accumulating 12,000 CSN. We are 

proposing this AD to prevent cracks 

from propagating into the disk bolt 

holes, which could result in a failure of 

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11018 Federal Register / Vol. 77, No. 37 / Friday, February 24, 2012 / Proposed Rules 

the 15th stage HPC disk, 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, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE., Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this AD, contact Pratt & Whitney, 400 

Main St., East Hartford, CT 06108; 

phone: 860–565–7700; fax: 860–565– 

1605. 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. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; 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 proposed AD, the 

regulatory evaluation, any comments 

received, and other information. The 

street address for the Docket Office 

(phone: 800–647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION 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. 

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–2010–1095; Directorate Identifier 

2009–NE–40–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 because of 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 we receive 

about this proposed AD. 

Discussion 

On June 24, 2011, we issued AD 

2011–14–07, amendment 39–16742 (76 

FR 47056, August 4, 2011), for all PW 

PW4074 and PW4077 turbofan engines 

with 15th stage HPC disks, part number 

(P/N) 55H615, installed. That AD 

requires removing the 15th stage HPC 

disk within 12,000 CSN or, for any disks 

that exceed 12,000 CSN after the 

effective date of this AD, using a 

drawdown plan that includes a BSI or 

ECI of the disk outer rim front rail for 

cracks. That AD resulted from multiple 

shop findings of cracked 15th stage HPC 

disks. We issued that 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. 

Actions Since Existing AD Was Issued 

Since we issued AD 2011–14–07 (76 

FR 47056, August 4, 2011), we received 

a request from an operator that we 

clarify our inspection schedule for 15th 

stage HPC disks that have accumulated 

more than 9,685, but less than 12,000 

CSN, on the effective date of the AD. 

The operator indicated that AD 2011– 

14–07 did not require a BSI or ECI for 

15th stage HPC disks that had more than 

9,685, but less than 12,000 CSN, on the 

effective date of the AD. Based on the 

comment, we reviewed the AD and 

found that this new AD action was 

necessary to ensure that the disc was 

inspected before accumulating 12,000 

CSN. This proposed AD would ensure 

that inspection will occur. 

Relevant Service Information 

We reviewed and approved the 

technical contents of Pratt & Whitney 

Service Bulletin (SB) PW4G–112–72– 

309, Revision 1, dated July 1, 2010. The 

SB describes procedures for performing 

a BSI or ECI for cracks in the front rail 

of the outer rim of the 15th stage HPC 

disk. 

FAA’s Determination 

We are proposing this AD because we 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would retain all 

requirements of AD 2011–14–07 (76 FR 

47056, August 4, 2011). This proposed 

AD would also clarify that 15th stage 

HPC disks that have accumulated more 

than 9,685, but less than 12,000 CSN, 

require a BSI or ECI of the disk outer 

rim front rail for cracks prior to 

accumulating 12,000 CSN. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 44 engines installed on 

airplanes of U.S. registry. Prorated parts 

life would cost about $66,000 per 15th 

stage HPC disk. Based on these figures, 

we estimate the total cost of the 

proposed AD to U.S. operators to be 

$2,904,000. The new requirements of 

this proposed AD add no additional 

economic burden. 

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 have 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 that the 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 

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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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