64242 Federal Register / Vol. 77, No. 203 / Friday, October 19, 2012 / Proposed Rules 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–1103; Directorate 

Identifier 2012–NM–131–AD] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 757–200, 

–200PF, –200CB, and –300 series 

airplanes. This proposed AD was 

prompted by reports of cracking of the 

forward bulkhead web, web stiffeners, 

attachment angles, and thermal anti-ice 

(TAI) spray ring assemblies of the 

engine air intake cowl. This proposed 

AD would require replacing the forward 

bulkhead assembly, TAI spray ring 

assembly, and attachment fittings of the 

air intake cowl. We are proposing this 

AD to prevent the failure of air intake 

cowl components due to cracking, 

which could result in the air intake 

cowl separating from the engine and 

striking critical airplane control surfaces 

that could result in a loss of airplane 

control; severe engine damage and loss 

of thrust; or large parts striking a person 

or property on the ground. 

DATES: We must receive comments on 

this proposed AD by December 3, 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 Rolls-Royce service information 

identified in this proposed AD, contact 

Rolls-Royce plc, P.O. Box 31, Derby, 

DE24 8BJ, United Kingdom; telephone 

011 44 1332 242424; fax 011 44 1332 

249936; email http://www.rollsroyce.com/contact/civil_team.jsp; 

Internet https://www.aeromanager.com. 

For Bombardier service information 

identified in this proposed AD, contact 

Short Brothers PLC, Airworthiness, P.O. 

Box 241, Airport Road, Belfast, BT3 9DZ 

Northern Ireland; telephone 

+44(0)2890–462469; fax +44(0)2890– 

468444; Internet http:// 

www.bombardier.com. You may review 

copies of the referenced service 

information at the FAA, Transport 

Airplane Directorate, 1601 Lind Avenue 

SW., Renton, Washington. For 

information on the availability of this 

material at the FAA, call 425–227–1221. 

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: 

Kevin Nguyen, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, 

Seattle Aircraft Certification Office 

(ACO), 1601 Lind Avenue SW., Renton, 

WA 98057–3356; phone: (425) 917– 

6501; fax: (425) 917–6590; email: 

kevin.nguyen@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2012–1103; Directorate Identifier 2012– 

NM–131–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 

We have received reports of extensive 

cracking of the forward bulkhead web, 

web stiffeners, attachment angles, and 

TAI spray ring assemblies of the air 

intake cowl. We received another report 

of extensive cracking in the forward 

bulkhead inner and outer cap angles, 

stiffeners, and the bulkhead web. In 

addition, the TAI piccolo tube and 

supports were found cracked after the 

intake cowl was disassembled. Further 

investigation determined that the issue 

was related to metal fatigue during the 

service lifetime of the components; 

therefore, there is a need to remove and 

replace the affected components within 

a prescribed timescale. Cracked air 

intake cowl parts and assemblies, if not 

corrected, could result in the air intake 

cowl separating from the engine and 

striking critical airplane control surfaces 

that could result in a loss of airplane 

control; severe engine damage, and loss 

of thrust; or large parts striking a person 

or property on the ground. 

Relevant Service Information 

We reviewed Rolls-Royce Service 

Bulletin RB.211–71–AG698, including 

Appendices 1, 2, 3, and 4, dated October 

14, 2011 (for engines having Dyna-Rohr 

or Bombardier standard air intake 

cowls); and Bombardier Alert Service 

Bulletin RB211–E4–A1003, Revision 1, 

dated August 15, 2012 (for engines with 

air intake cowls modified by 

Bombardier Aerospace Supplemental 

Type Certificate (STC) ST02102NY, 

http://rgl.faa.gov/ 

Regulatory_and_Guidance_Library/ 

rgstc.nsf/0/ 

256325188c3b1f2f8625705f004dd977/ 

$FILE/ST02102NY.pdf, commonly 

known as a 535EX cowls). The service 

information describes procedures for 

removing and replacing, with new parts, 

the forward bulkhead assembly, TAI 

spray ring assembly, and attachment 

fittings of the air intake cowl. 

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 require 

accomplishing the actions specified in 

the service information described 

previously. 

Interim Action 

We consider this proposed AD 

interim action due to on-going 

investigation into the nature, cause, and 

extent of the cracking. If final action is 

later identified, based on the results of 

the investigation, we might consider 

further rulemaking then. 


tkelley on DSK3SPTVN1PROD with PROPOSALS
Federal Register / Vol. 77, No. 203 / Friday, October 19, 2012 / Proposed Rules 64243 

Costs of Compliance 

We estimate that this proposed AD 

affects 332 airplanes of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per product Cost on U.S. operators 

Replace left-side air 

intake cowl components.

Up to 252 work-hours × $85 per hour = 

$21,420 per replacement.

Up to $158,760 ......... Up to $180,180 per replacement.Up to $59,819,760. 

Replace right-side air 

intake cowl components.

Up to 252 work-hours × $85 per hour = 

$21,420 per replacement.

Up to $158,760 ......... Up to $180,180 per replacement.Up to $59,819,760. 

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), 

(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 adding 

the following new airworthiness 

directive (AD): 

The Boeing Company: Docket No. FAA– 

2012–1103; Directorate Identifier 2012– 

NM–131–AD. 

(a) Comments Due Date 

We must receive comments by December 3, 

2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 757–200, –200PF, –200CB, and –300 

series airplanes, certificated in any category, 

equipped with Rolls-Royce RB211–535E4, 

–535E4–B, –535E4–C, and –535E4X engines; 

or with Rolls-Royce RB211–535E4, –535E4– 

B, and –535E4–C engines that have air intake 

cowls that were modified by Bombardier 

Aerospace Supplemental Type Certificate 

(STC) ST02102NY, http://rgl.faa.gov/ 

Regulatory_and_Guidance_Library/rgstc.nsf/ 

0/256325188c3b1f2f8625705f004dd977/ 

$FILE/ST02102NY.pdf, commonly known as 

535E4X cowls. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 71, Powerplant. 

(e) Unsafe Condition 

This AD was prompted by reports of 

cracking of the forward bulkhead web, web 

stiffeners, attachment angles, and thermal 

anti-ice (TAI) spray ring assemblies of the 

engine air intake cowl. We are issuing this 

AD to prevent the failure of air intake cowl 

components due to cracking, which could 

result in the air intake cowl separating from 

the engine and striking critical airplane 

control surfaces that could result in a loss of 

airplane control; severe engine damage, and 

loss of thrust; or large parts striking a person 

or property on the ground. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Replacement of Air Intake Cowl 

Complete Forward Bulkhead Assemblies 

Previously Disassembled 

For airplanes on which the air intake cowls 

were replaced before the effective date of this 

AD using a kit or parts identified in 

paragraph (g)(1), (g)(2), or (g)(3) of this AD: 

Within 144 months since replacement of the 

air intake cowl, or within 12 months after the 

effective date of this AD, whichever is later, 

replace the forward bulkhead assembly, TAI 

spray ring assembly, and associated 

attachment fittings of the air intake cowl with 

new parts, in accordance with the 

Accomplishment Instructions of Bombardier 

Alert Service Bulletin RB211–E4–A1003, 

Revision 1, dated August 15, 2012 (for 

engines with air intake cowls modified by 

Bombardier Aerospace STC ST02102NY, 

http://rgl.faa.gov/ 

Regulatory_and_Guidance_Library/rgstc.nsf/ 

0/256325188c3b1f2f8625705f004dd977/ 

$FILE/ST02102NY.pdf, commonly known as 

a 535EX cowls); or Rolls-Royce Service 

Bulletin RB.211–71–AG698, dated October 

14, 2011 (for engines having Dyna-Rohr or 

Bombardier standard air intake cowls). 

Repeat the replacement thereafter at intervals 

not to exceed 144 months. 

(1) RB211–E4A1003 KIT, or all the parts 

listed in Appendix 3 of Bombardier Alert 

Service Bulletin RB211–E4–A1003, Revision 

1, dated August 15, 2012 (for engines with air 

intake cowls modified by STC ST02102NY, 

commonly known as a 535EX cowls). 

(2) RB–211–71–AG698–E4KIT, or all the 

parts listed in Appendix 3 of Rolls-Royce 

Service Bulletin RB.211–71–AG698, dated 

October 14, 2011 (for engines with DynaRohr standard air intake cowls). 

(3) RB–211–71–AG698–E4BKIT, or all the 

parts listed in Appendix 4 of Rolls-Royce 


tkelley on DSK3SPTVN1PROD with PROPOSALS
64244 Federal Register / Vol. 77, No. 203 / Friday, October 19, 2012 / Proposed Rules 

Service Bulletin RB.211–71–AG698, dated 

October 14, 2011 (for engines with 

Bombardier standard air intake cowls). 

(h) Replacement of In-Service Air Intake 

Cowl Complete Forward Bulkhead 

Assemblies 

For airplanes other than those identified in 

paragraph (g) of this AD: At the applicable 

time specified in paragraphs (h)(1) through 

(h)(12) of this AD, replace the forward 

bulkhead assembly, TAI spray ring assembly, 

and associated attachment fittings of the air 

intake cowl with new parts, in accordance 

with the Accomplishment Instructions of 

Bombardier Alert Service Bulletin RB211– 

E4–A1003, Revision 1, dated August 15, 2012 

(for engines with air intake cowls modified 

by Bombardier Aerospace STC ST02102NY 

http://rgl.faa.gov/ 

Regulatory_and_Guidance_Library/rgstc.nsf/ 

0/256325188c3b1f2f8625705f004dd977/ 

$FILE/ST02102NY.pdf, commonly known as 

a 535EX cowls); or Rolls-Royce Service 

Bulletin RB.211–71–AG698, dated October 

14, 2011 (for engines with Dyna-Rohr or 

Bombardier standard air intake cowls.) 

Repeat the replacement thereafter at intervals 

not to exceed 144 months. 

(1) For airplanes with air intake cowls 

having serial numbers 4001 through 4121 

inclusive: Replace within 12 months after the 

effective date of this AD. 

(2) For airplanes with air intake cowls 

having serial numbers 4122 through 4241 

inclusive: Replace within 24 months after the 

effective date of this AD. 

(3) For airplanes with air intake cowls 

having serial numbers 4242 through 4361 

inclusive: Replace within 36 months after the 

effective date of this AD. 

(4) For airplanes with air intake cowls 

having serial numbers 4362 through 4481 

inclusive: Replace within 48 months after the 

effective date of this AD. 

(5) For airplanes with air intake cowls 

having serial numbers 4482 through 4484 

inclusive: Replace within 60 months after the 

effective date of this AD. 

(6) For airplanes with air intake cowls 

having serial numbers 9001 through 9117 

inclusive: Replace within 60 months after the 

effective date of this AD. 

(7) For airplanes with air intake cowls 

having serial numbers 9118 through 9237 

inclusive: Replace within 72 months after the 

effective date of this AD. 

(8) For airplanes with air intake cowls 

having serial numbers 9238 through 9357 

inclusive: Replace within 84 months after the 

effective date of this AD. 

(9) For airplanes with air intake cowls 

having serial numbers 9358 through 9477 

inclusive: Replace within 96 months after the 

effective date of this AD. 

(10) For airplanes with air intake cowls 

having serial numbers 9478 through 9597 

inclusive: Replace within 108 months after 

the effective date of this AD. 

(11) For airplanes with air intake cowls 

having serial numbers 9598 through 9717 

inclusive: Replace within 120 months after 

the effective date of this AD. 

(12) For airplanes with air intake cowls 

having serial numbers 9718 through 9780 

inclusive: Replace within 132 months after 

the effective date of this AD. 

(i) Credit for Previous Actions 

For engines with air intake cowls modified 

by Bombardier Aerospace STC ST02102NY 

http://rgl.faa.gov/ 

Regulatory_and_Guidance_Library/rgstc.nsf/ 

0/256325188c3b1f2f8625705f004dd977/ 

$FILE/ST02102NY.pdf, commonly known as 

a 535EX cowls): This paragraph provides 

credit for actions required by paragraphs (g) 

and (h) of this AD, if those actions were 

performed before the effective date of this AD 

using Bombardier Alert Service Bulletin 

RB211–E4–A1003, dated June 27, 2012 

(which is not incorporated by reference in 

this AD). 

(j) No Reporting Requirement 

Although Bombardier Alert Service 

Bulletin RB211–E4–A1003, Revision 1, dated 

August 15, 2012; and Rolls-Royce Service 

Bulletin RB.211–71–AG698, excluding 

Appendix 1 and including Appendices 2, 3, 

and 4, dated October 14, 2011; specify to 

submit certain reporting information to the 

manufacturer, this AD does not include that 

requirement. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair 

required by this AD if it is approved by the 

Boeing Commercial Airplanes Organization 

Designation Authorization (ODA) that has 

been authorized by the Manager, Seattle 

ACO, to make those findings. For a repair 

method to be approved, the repair must meet 

the certification basis of the airplane, and the 

approval must specifically refer to this AD. 

(l) Related Information 

(1) For more information about this AD, 

contact Kevin Nguyen, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, Seattle 

Aircraft Certification Office (ACO), 1601 Lind 

Avenue SW., Renton, WA 98057–3356; 

phone: (425) 917–6501; fax: (425) 917–6590; 

email: kevin.nguyen@faa.gov. 

(2) For Rolls-Royce service information 

identified in this AD, contact Rolls-Royce 

plc, P.O. Box 31, Derby, DE24 8BJ, United 

Kingdom; telephone 011 44 1332 242424; fax 

011 44 1332 249936; email http://www.rollsroyce.com/contact/civil_team.jsp; Internet 

https://www.aeromanager.com. For 

Bombardier Service information identified in 

this AD, contact Short Brothers PLC, 

Airworthiness, P.O. Box 241, Airport Road, 

Belfast, BT3 9DZ Northern Ireland; telephone 

+44(0)2890–462469; fax +44(0)2890–468444; 

Internet http://www.bombardier.com. You 

may review copies of the referenced service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, call 

425–227–1221. 

Issued in Renton, Washington, on October 

12, 2012. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–25780 Filed 10–18–12; 8:45 am] 

BILLING CODE 4910–13–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 58 

[EPA–HQ–OAR–2012–0486, FRL–9741–6] 

RIN 2060–AR59 

Revision to Ambient Nitrogen Dioxide 

Monitoring Requirements 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: The EPA is proposing to 

revise the deadlines established in the 

national ambient air quality standard 

(NAAQS) for nitrogen dioxide (NO2) for 

the near-road component of the NO2

monitoring network and to implement a 

phased deployment approach. This 

approach would create a series of 

deadlines that would make the nearroad NO2 network operational between 

January 1, 2014, and January 1, 2017. 

The EPA is also proposing to revise the 

approval authority for annual 

monitoring network plans for NO2

monitoring. 

DATES: Comments must be received on 

or before November 19, 2012. 

Public Hearing. If anyone contacts the 

EPA by October 29, 2012 requesting to 

speak at a public hearing, a hearing will 

be held on November 19, 2012. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–HQ– 

OAR–2012–0486 by one of the following 

methods: 

• www.regulations.gov: Follow the 

online instructions for submitting 

comments. 

• Email: a-and-r-Docket@epa.gov. 

• Fax: (202) 566–9744. 

• Mail: Docket No. EPA–HQ–OAR– 

2012–0486, Environmental Protection 

Agency, Mail code 6102T, 1200 

Pennsylvania Ave. NW., Washington, 

DC 20460. Please include a total of two 

copies. 


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