This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

47561 

Vol. 73, No. 158 

Thursday, August 14, 2008 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2008–0589; Directorate 

Identifier 2008–NE–17–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney (P&W) PW4000 Series 94-Inch 

Fan Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

P&W PW4052, PW4056, PW4060, 

PW4062, PW4152, PW4156A, PW4158, 

PW4460, and PW4462 turbofan engines. 

This proposed AD would require a 

onetime visual inspection of all EEC– 

131 model electronic engine controls 

(EECs). This proposed AD would 

require the EECs to be identified, 

categorized by group number, marked, 

and replaced using a fleet management 

plan. This proposed AD results from a 

report of an uncommanded engine inflight shutdown due to defective EEC 

pulse width modulator (PWM) 

microcircuits. We are proposing this AD 

to prevent uncommanded in-flight 

engine shutdowns which could result in 

loss of thrust and prevent continued 

safe flight or landing. 

DATES: We must receive any comments 

on this proposed AD by September 15, 

2008. 

ADDRESSES: Use one of the following 

addresses to comment on this proposed 

AD. 

• 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. 

You can get the service information 

identified in this proposed AD from 

Pratt & Whitney, 400 Main St., East 

Hartford, CT 06108; telephone (860) 

565–8770; fax (860) 565–4503. 

FOR FURTHER INFORMATION CONTACT: V. 

Rose Len, Aerospace Engineer, Engine 

Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

e-mail: rose.len@faa.gov; telephone 

(781) 238–7772; fax (781) 238–7199. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send us any written 

relevant data, views, or arguments 

regarding this proposal. Send your 

comments to an address listed under 

ADDRESSES. Include ‘‘Docket No. FAA– 

2008–0589; Directorate Identifier 2008- 

NE–17–AD’’ in the subject line of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of the proposed AD. We will 

consider all comments received by the 

closing date and may amend the 

proposed AD in light 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 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). 

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 (telephone (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. 

Discussion 

In May of 2006 we received a report 

of an uncommanded engine in-flight 

shutdown of a P&W PW4152 turbofan 

engine. The investigation of this event 

determined that certain EECs were built 

with defective PWM microcircuits. The 

defective microcircuits degrade over 

time as a result of thermal cycling while 

operating within their certified 

temperature range. In operation, the EEC 

system tests the functional capability of 

the PWM in Channel A. If the Channel 

A PWM fails the test, the EEC 

automatically switches to the Channel B 

PWM. In this case, both of the EEC 

PWMs are degrading similarly and the 

Channel B PWM is also likely to fail, at 

which time the EEC automatically shuts 

down the engine. Based on a risk 

analysis provided by P&W which we 

reviewed and concurred, this condition, 

if not corrected, could result in 

uncommanded in-flight engine 

shutdowns, which could result in loss 

of thrust and prevent continued safe 

flight or landing. 

The defective PWMs are the result of 

a change from the original PWM design 

introduced by a single microcircuit 

supplier before 1993. Our investigation 

showed that the supplier returned to the 

original PWM design between 1993 and 

1994. The EEC supplier determined the 

population of affected EECs by testing 

model EEC–131 EECs built after the 

introduction of the PWM design change. 

The EEC supplier performed destructive 

testing of the PWMs, and identified four 

distinct groups of EECs by serial 

number: 

Group 1: EECs with a high 

concentration of PWMs that failed 

during testing. 

Group 2: EECs with a low 

concentration of PWMs that failed 

during testing. 

Group 3: All EECs not in Group 1 or 

Group 2 but may contain suspect PWMs 

due to board swapping during the repair 

or refurbishment of the EEC. 


rfrederick on PROD1PC67 with PROPOSALS
47562 Federal Register / Vol. 73, No. 158 / Thursday, August 14, 2008 / Proposed Rules 

Group 4: EECs have been inspected 

for defective PWMs and repaired if 

required. 

To facilitate the timely removal of the 

defective PWMs from the fleet, all of the 

EECs must first be identified, 

categorized, and marked by their group 

number so that the higher risk EECs will 

be replaced before the lower risk EECs 

are replaced. Group 4 EECs have been 

inspected or repaired, so they are not 

subject to the same PWM problem. 

However, they still require further 

internal and external labeling for 

tracking purposes. Labeling will be done 

using P&W Alert Service Bulletin (ASB) 

No. PW4ENG 73–216, dated April 8, 

2008. 

Relevant Service Information 

We have reviewed and approved the 

technical contents of P&W ASB No. 

PW4ENG A73–214, Revision 2, dated 

May 23, 2008. That ASB describes 

procedures for inspecting, identifying, 

categorizing, and marking all EEC–131 

model EECs that are identified by part 

number and serial number into four 

groups. The Group 1 EECs have a high 

probability of having defective PWM 

microcircuits, while the other groups 

have a lower probability of having 

defective PWM microcircuits. 

FAA’s Determination and Requirements 

of the Proposed AD 

We have evaluated all pertinent 

information and identified an unsafe 

condition that is likely to exist or 

develop on other products of this same 

type design. We are proposing this AD, 

which would require a onetime visual 

inspection of all EEC–131 model EECs. 

The proposed AD would also require 

the EECs to be identified, categorized by 

group number, marked, and replaced 

using a fleet management plan. The 

proposed AD would require you to use 

the service information described 

previously to perform these actions. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 730 P&W PW4000 series 

94-inch fan turbofan engines installed 

on airplanes of U.S. registry. We also 

estimate that it would take about 1 

work-hour per engine to inspect, 

categorize, and mark each of the 730 

EECs, and 1 work-hour per engine to 

replace up to 730 EECs. The average 

labor rate is $80 per work-hour. 

Required replacement parts would cost 

about $400 per engine. Based on these 

figures, we estimate the total cost of the 

proposed AD to U.S. operators to be 

$467,200. 

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 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. Would 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. You may get a copy 

of this summary at the address listed 

under ADDRESSES. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety. 

The Proposed Amendment 

Under the authority delegated to me 

by the Administrator, the Federal 

Aviation Administration 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 adding 

the following new airworthiness 

directive: 

Pratt & Whitney: Docket No. FAA–2008–

0589; Directorate Identifier 2008–NE–

17–AD. 

Comments Due Date 

(a) The Federal Aviation Administration 

(FAA) must receive comments on this 

airworthiness directive (AD) action by 

September 15, 2008. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Pratt & Whitney 

(P&W) PW4052, PW4056, PW4060, PW4062, 

PW4152, PW4156A, PW4158, PW4460, and 

PW4462 turbofan engines. These engines are 

installed on, but not limited to, Airbus A300–

600 and A310–300, and Boeing 747–400, 

Boeing 767–200, 767–300, and MD–11 series 

airplanes. 

Unsafe Condition 

(d) This AD results from a report of an 

uncommanded engine in-flight shutdown 

due to defective electronic engine control 

(EEC) pulse width modulator (PWM) 

microcircuits. We are issuing this AD to 

prevent uncommanded in-flight engine 

shutdowns which could result in loss of 

thrust and prevent continued safe flight or 

landing. 

Compliance 

(e) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified unless the 

actions have already been done. 

Onetime Visual Inspection and Reporting 

Requirements 

(f) Within 600 operating hours after the 

effective date of this AD: 

(1) Perform a onetime visual inspection of 

the EEC–131 model EECs to identify, 

categorize, and mark them as a Group 1, 

Group 2, Group 3, or Group 4 EEC. 

(2) Use paragraphs 1 through 7 in the 

Accomplishment Instructions of P&W Alert 

Service Bulletin No. PW4ENG A73–214, 

Revision 2, dated May 23, 2008, to inspect, 

categorize, and mark the EECs. 

(3) Within 30 calendar days of completing 

paragraph (f)(1) of this AD, report all 

inspection findings to V. Rose Len, Engine 

Certification Office, Engine & Propeller 

Directorate, 12 New England Executive Park, 

Burlington, MA 01803. 

(4) The Office of Management and Budget 

(OMB) has approved the reporting 

requirements and assigned OMB control 

number 2120–0056. 

Replacement of Group 1 EECs 

(g) Replace Group 1 EECs with a 

serviceable EEC before reaching 2,000 cyclesin-service (CIS) since new, but not later than 

one year from the effective date of this AD. 


rfrederick on PROD1PC67 with PROPOSALS
Federal Register / Vol. 73, No. 158 / Thursday, August 14, 2008 / Proposed Rules 47563 

Replacement of Groups 2, 3, and 4 EECs 

(h) Replace the following groups of EECs 

with a serviceable EEC, or any EEC that does 

not violate the EEC installation procedure as 

provided by paragraphs (k), (l), and (m) of 

this AD, as follows: 

(1) Group 2 EECs, before reaching 4,000 

CIS since new, but not later than 2 years after 

the effective date of this AD. 

(2) Group 3 EECs, before reaching 14,000 

CIS since new, but not later than 6 years after 

the effective date of this AD. 

Definition of Serviceable EECs 

(i) A serviceable EEC is an EEC that does 

not violate the EEC installation procedure as 

provided by paragraphs (k), (l), and (m) of 

this AD, or is marked as Group 4 per P&W 

ASB No. PW4ENG 73–214, Revision 2, dated 

May 23, 2008, or has been repaired per P&W 

Service Bulletin (SB) No. PW4ENG 73–216, 

dated April 8, 2008. Once an EEC has been 

repaired, it is viewed as a Group 4 EEC. 

(j) Information on obtaining a serviceable 

EEC can be found in P&W SB No. PW4ENG 

73–216, dated April 8, 2008. 

EEC Installation Prohibition 

(k) Do not install any Group 1 EEC after 1 

year from the effective date of this AD or any 

Group 1 EEC that has reached 2,000 CIS since 

new. 

(l) Do not install any Group 2 EEC after 2 

years from the effective date of this AD or 

any Group 2 EEC that has reached 4,000 CIS 

since new. 

(m) Do not install any Group 3 EEC after 

6 years from the effective date of this AD or 

any Group 3 EEC that has reached 14,000 CIS 

since new. 

Alternative Methods of Compliance 

(n) The Manager, Engine Certification 

Office, has the authority to approve 

alternative methods of compliance for this 

AD if requested using the procedures found 

in 14 CFR 39.19. 

Related Information 

(o) Contact V. Rose Len, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 

01803; e-mail: rose.len@faa.gov; telephone 

(781) 238–7772; fax (781) 238–7199, for more 

information about this AD. 

Issued in Burlington, Massachusetts, on 

August 8, 2008. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. E8–18811 Filed 8–13–08; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF THE TREASURY 

Internal Revenue Service 

26 CFR Part 1 

[REG–103146–08] 

RIN 1545–BH69 

Information Reporting Requirements 

Under Internal Revenue Code Section 

6039; Correction 

AGENCY: Internal Revenue Service (IRS), 

Treasury. 

ACTION: Correction to notice of proposed 

rulemaking. 

SUMMARY: This document contains 

corrections to a notice of proposed 

rulemaking (REG–103146–08) that was 

published in the Federal Register on 

Thursday, July 17, 2008 (73 FR 40999) 

relating to the return and information 

statement requirements under section 

6039 of the Internal Revenue Code. 

These regulations reflect changes to 

section 6039 made by section 403 of the 

Tax Relief and Health Care Act of 2006. 

These proposed regulations affect 

corporations that issue statutory stock 

options and provide guidance to assist 

corporations in complying with the 

return and information statement 

requirements under section 6039. 

FOR FURTHER INFORMATION CONTACT: 

Thomas Scholz, (202) 622–6030 (not a 

toll-free number). 

SUPPLEMENTARY INFORMATION: 

Background 

The correction notice that is the 

subject of this document is under 

section 6039 of the Internal Revenue 

Code. 

Need for Correction 

As published, the notice of proposed 

rulemaking (REG–103146–08) contains 

errors that may prove to be misleading 

and are in need of clarification. 

Correction of Publication 

Accordingly, the publication of the 

notice of proposed rulemaking (REG–

103146–08), which was the subject of 

FR Doc. E8–16177, is corrected as 

follows: 

§ 1.6039–1 [Corrected] 

1. On page 41002, column 2, 

§ 1.6039–1(a)(1), line 5 of the column, 

the language ‘‘a return with respect each 

transfer made’’ is corrected to read ‘‘a 

return with respect to each transfer 

made’’. 

2. On page 41002, column 2, 

§ 1.6039–1(b)(1), line 12, the language 

‘‘calendar year, file a return with 

respect’’ is corrected to read ‘‘calendar 

year, file a return with respect to’’. 

3. On page 41002, column 2, 

§ 1.6039–1(b)(1)(iv), the language ‘‘The 

fair market value of the stock on the 

date the option was granted;’’ is 

corrected to read ‘‘The fair market value 

of a share of stock on the date the option 

was granted;’’. 

4. On page 41002, column 3, 

§ 1.6039–1(b)(1)(vii), the language ‘‘The 

fair market value of the stock on the 

date the option was exercised by the 

transferor;’’ is corrected to read ‘‘The 

fair market value of a share of stock on 

the date the option was exercised by the 

transferor;’’. 

§ 1.6039–2 [Corrected] 

5. On page 41003, column 1, 

§ 1.6039–2(b), line 4, the language 

‘‘section 6039(a)(2). (1) Every 

corporation’’ is corrected to read 

‘‘section 6039(b). (1) Every corporation’’. 

LaNita Van Dyke, 

Chief, Publications and Regulations Branch, 

Legal Processing Division, Associate Chief 

Counsel (Procedure and Administration). 

[FR Doc. E8–18784 Filed 8–13–08; 8:45 am] 

BILLING CODE 4830–01–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 63 

[EPA–R09–OAR–2008–0555; FRL–8701–6] 

Delegation of National Emission 

Standards for Hazardous Air Pollutants 

for Source Categories; State of 

Arizona, Arizona Department of 

Environmental Quality, Pima County 

Department of Environmental Quality 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: Pursuant to section 112(l) of 

the 1990 Clean Air Act, EPA granted 

delegation of specific national emission 

standards for hazardous air pollutants 

(NESHAP) to the Arizona Department of 

Environmental Quality on June 4, 2008, 

and to the Pima County Department of 

Environmental Quality on June 16, 

2008. EPA is proposing to revise the 

Code of Federal Regulations to reflect 

the current delegation status of NESHAP 

in Arizona. 

DATES: Any comments on this proposal 

must arrive by September 15, 2008. 

ADDRESSES: Submit comments, 

identified by docket number EPA–R09–

OAR–2008–0555, by one of the 

following methods: 


rfrederick on PROD1PC67 with PROPOSALS