Federal Register / Vol. 78, No. 191 / Wednesday, October 2, 2013 / Proposed Rules 60807 

repetitive inspections required by paragraph 

(h)(1) of this AD. 

(i) Optional Terminating Action 

Accomplishment of the preventive 

modification on the STA 291.5 frame web, in 

accordance with Part 2 of the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1241, Revision 1, 

dated June 11, 2013, terminates the repetitive 

inspections required by paragraph (h)(1) of 

this AD for the area that is common to the 

preventive modification. 

(j) Exceptions to the Service Information 

(1) Where Boeing Alert Service Bulletin 

737–53A1241, Revision 1, dated June 11, 

2013, specifies to contact Boeing for a 

corrective action: Before further flight, do the 

applicable action using a method approved 

in accordance with the procedures specified 

in paragraph (l) of this AD. 

(2) Where paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737–53A1241, 

Revision 1, dated June 11, 2013, specifies a 

compliance time ‘‘after the date on Revision 

1 of this service bulletin,’’ this AD requires 

compliance within the specified compliance 

time after the effective date of this AD. 

(k) Credit for Previous Actions 

This paragraph provides credit for the 

actions specified in paragraph (h)(1) of this 

AD, if those actions were performed before 

the effective date of this AD using Boeing 

Alert Service Bulletin 737–53A1241, dated 

June 13, 2002, which is not incorporated by 

reference in this AD. 

(l) 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 

paragraph (m) of this AD. Information may be 

emailed to: 9-ANM-Seattle-ACO–AMOCRequests@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. 

(4) AMOCs approved for the actions 

specified in AD 2005–07–12, Amendment 

39–14036 (70 FR 17596, April 7, 2005), are 

approved as AMOCs for the corresponding 

provisions of this AD. 

(m) Related Information 

(1) For more information about this AD, 

contact Alan Pohl, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA Seattle 

Aircraft Certification Office, 1601 Lind 

Avenue SW., Renton, Washington 98057– 

3356; phone: 425–917–6450; fax: 425–917– 

6590; email: alan.pohl@faa.gov. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, WA 98124–2207; telephone 206– 

544–5000, extension 1; fax 206–766–5680; 

Internet https://www.myboeingfleet.com. You 

may review copies of the referenced service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Ave. SW., Renton, 

Washington. For information on the 

availability of this material at the FAA, call 

425–227–1221. 

Issued in Renton, Washington on 

September 25, 2013. 

Jeffrey E. Duven, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–24040 Filed 10–1–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0837; Directorate 

Identifier 2013–NM–112–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 737–200, 

–200C, –300, –400, and –500 series 

airplanes. This proposed AD was 

prompted by reports of cracking found 

in the skin at the lower aft corner of the 

forward entry doorway on airplanes that 

do not have an airstair door cutout. This 

proposed AD would require repetitive 

inspections for cracking in the lower 

corners of the forward entry doorway on 

airplanes that do not have an airstair 

door cutout, and repair if necessary. We 

are proposing this AD to detect and 

correct cracking in the lower corners of 

the forward entry doorway, which could 

lead to crack progression and 

consequent rapid decompression of the 

airplane. 

DATES: We must receive comments on 

this proposed AD by November 18, 

2013. 

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 proposed AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P. O. Box 3707, 

MC 2H–65, Seattle, WA 98124–2207; 

telephone 206–544–5000, extension 1; 

fax 206–766–5680; Internet https://

www.myboeingfleet.com. You may 

review copies of the referenced service 

information at the FAA, Transport 

Airplane Directorate, 1601 Lind Avenue 

SW., Renton, WA. 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: 

Alan Pohl, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue SW., Renton, WA 

98057–3356; phone: (425) 917–6450; 

fax: (425) 917–6590; email: alan.pohl@

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– 

2013–0837; Directorate Identifier 2013– 

NM–112–AD’’ at the beginning of your 

comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

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60808 Federal Register / Vol. 78, No. 191 / Wednesday, October 2, 2013 / Proposed Rules 

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 five reports of 

cracking found in the skin at the lower 

aft corner of the forward entry doorway 

on airplanes that do not have an airstair 

door cutout. The cracks ranged from 

0.25 to 2.0 inches in length. The 

airplanes had accumulated between 

34,813 and 73,083 total flight cycles. 

Cracking in the lower corners of the 

forward entry doorway is caused by 

fatigue loads in the skin and bear strap, 

and are magnified by local stress 

concentrations due to the door cutout 

and edge margin effects at fastener 

locations near the corner radius. 

Cracking can also be initiated from 

impact damage due to a high usage rate 

of the forward entry door. This 

condition, if not corrected, could result 

in crack progression and consequent 

rapid decompression of the airplane. 

Relevant Service Information 

We reviewed Boeing Alert Service 

Bulletin 737–53A1329, dated June 4, 

2013. This service bulletin describes 

procedures for repetitive inspections for 

cracking in the skin assembly and bear 

strap at the lower corners of the forward 

entry doorway. This service bulletin 

describes the following actions: 

• Internal detailed inspection of the 

skin assembly and bear strap; 

• Internal high frequency eddy 

current (HFEC) inspection of the bear 

strap; 

• External detailed and HFEC 

inspections of the skin assembly; and, 

• Contacting Boeing for inspection 

(for Group 1 airplanes), inspection (for 

Groups 2 and 3 airplanes), and crack 

repair instructions (Group 3 airplanes). 

Boeing Alert Service Bulletin 737– 

53A1329, dated June 4, 2013, specifies 

compliance times for the initial 

inspection as before the accumulation of 

27,000 total flight cycles or within 4,500 

flight cycles after the issue date of the 

service bulletin, whichever occurs later. 

The repetitive interval is 4,500 flight 

cycles. Repairs are to be done before 

further flight. 

Other Relevant Rulemaking 

For The Boeing Company Model 737– 

300, –400, and –500 series airplanes, the 

repair identified in Boeing Alert Service 

Bulletin 737–53A1329, dated June 4, 

2013, may affect certain areas of 

Significant Structural Item F–13A 

inspections required by paragraphs (g) 

and (h) of AD 2008–09–13, Amendment 

39–15494 (73 FR 24164, May 2, 2008). 

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, except as discussed under 

‘‘Differences Between this Proposed AD 

and the Service Information.’’ 

Differences Between This Proposed AD 

and the Service Information 

Boeing Alert Service Bulletin 737– 

53A1329, dated June 4, 2013, specifies 

contacting the manufacturer for 

inspection instructions (for Group 1 

airplanes) and for repair instructions (all 

airplanes), but this proposed AD would 

require accomplishing those actions in 

one of the following ways: 

• In accordance with a method that 

we approve; or 

• Using data that meet the 

certification basis of the airplane, and 

that have been approved by the Boeing 

Commercial Airplanes Organization 

Designation Authorization whom we 

have authorized to make those findings. 

This difference has been coordinated 

with Boeing. 

Costs of Compliance 

We estimate that this proposed AD 

affects 376 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 

Inspection of the lower corners of the forward entry 

doorway (Groups 2 and 3 

airplanes) 1.

5 work-hours × $85 per hour 

= $425, per inspection 

cycle.

$0 $425, per inspection cycle ..... $159,800, per inspection 

cycle. 

1We have received no definitive data that would enable us to provide cost estimates for the inspection on Group 1 airplanes. 

We have received no definitive data 

that would enable us to provide cost 

estimates for the on-condition actions 

specified in this proposed AD. 

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 

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Federal Register / Vol. 78, No. 191 / Wednesday, October 2, 2013 / Proposed Rules 60809 

(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– 

2013–0837; Directorate Identifier 2013– 

NM–112–AD. 

(a) Comments Due Date 

We must receive comments by November 

18, 2013. 

(b) Affected ADs 

For The Boeing Company Model 737–300, 

–400, and –500 series airplanes: Certain 

requirements of AD 2008–09–13, 

Amendment 39–15494 (73 FR 24164, May 2, 

2008), may be affected by certain 

requirements of this AD. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 737–200, –200C, –300, –400, and –500 

series airplanes, certificated in any category, 

without an airstair door cutout, as identified 

in Boeing Alert Service Bulletin 737– 

53A1329, dated June 4, 2013. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by reports of 

cracking found in the skin at the lower aft 

corner of the forward entry doorway on 

airplanes that do not have an airstair door 

cutout. We are issuing this AD to detect and 

correct cracking in the lower corners of the 

forward entry doorway, which could lead to 

crack progression and consequent rapid 

decompression of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Repetitive Inspections 

Except as provided by paragraph (i)(1) of 

this AD, at the applicable times specified in 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1329, dated 

June 4, 2013, do the actions specified in 

paragraph (g)(1) or (g)(2) of this AD, as 

applicable. 

(1) For Group 1 airplanes, as identified in 

Boeing Alert Service Bulletin 737–53A1329, 

dated June 4, 2013: Except as provided by 

paragraph (i)(2) of this AD, inspect the lower 

corners of the forward entry doorway for 

cracking, using a method approved in 

accordance with the procedures specified in 

paragraph (j) of this AD. 

(2) For Group 2 and Group 3 airplanes, as 

identified in Boeing Alert Service Bulletin 

737–53A1329, dated June 4, 2013: At the 

forward entry doorway lower forward and aft 

corners, as applicable, do an internal detailed 

inspection of the skin assembly and bear 

strap, an internal high frequency eddy 

current (HFEC) inspection of the bear strap, 

and external detailed and HFEC inspections 

of the skin assembly for cracking, in 

accordance with Part 2 of the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1329, dated June 4, 

2013. If no cracking is found during any 

inspection required by this paragraph: Except 

as provided by paragraph (i)(1) of this AD, 

repeat the applicable inspections at the 

applicable time specified in paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1329, dated June 4, 2013. 

(h) Repair 

(1) If any cracking is found during any 

inspection required by paragraph (g) of this 

AD: For Group 3 airplanes with cracking at 

the aft lower corner of the forward entry 

doorway, before further flight, repair in 

accordance with Part 2 of the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1329, dated June 4, 

2013. Accomplishment of this repair 

terminates the repetitive inspections required 

by this AD in the area common to the repair 

for Group 3 airplanes only. For all other 

cracking found, before further flight, repair 

using a method approved in accordance with 

the procedures specified in paragraph (j) of 

this AD. 

(2) Installation of a repair approved in 

accordance with paragraph (j) of this AD 

terminates the repetitive inspections required 

by this AD for the repaired area only. 

(i) Exceptions to Service Information 

Specifications 

(1) Where Boeing Alert Service Bulletin 

737–53A1329, dated June 4, 2013, specifies 

a compliance time ‘‘after the original issue 

date of this service bulletin,’’ this AD 

requires compliance within the specified 

compliance time after the effective date of 

this AD. 

(2) Although Boeing Alert Service Bulletin 

737–53A1329, dated June 4, 2013, specifies 

contacting Boeing for information on certain 

inspections and repairs, this AD requires that 

those actions be done by using a method 

approved in accordance with the procedures 

specified in paragraph (j) of this AD. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle 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–ANM– 

Seattle–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. 

(k) Related Information 

(1) For more information about this AD, 

contact Alan Pohl, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, Seattle 

Aircraft Certification Office, 1601 Lind 

Avenue SW., Renton, WA 98057–3356; 

phone: (425) 917–6450; fax: (425) 917–6590; 

email: alan.pohl@faa.gov. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P. O. Box 3707, MC 2H–65, 

Seattle, WA 98124–2207; telephone 206– 

544–5000, extension 1; fax 206–766–5680; 

Internet https://www.myboeingfleet.com. You 

may review copies of the referenced service 

information at the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue SW., Renton, 

WA. For information on the availability of 

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

Issued in Renton, Washington, on 

September 25, 2013. 

Jeffrey E. Duven, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2013–24121 Filed 10–1–13; 8:45 am] 

BILLING CODE 4910–13–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 300 

[EPA–HQ–SFUND–1983–0002; FRL–9901– 

59-Region 2] 

National Oil and Hazardous 

Substances Pollution Contingency 

Plan; National Priorities List: Deletion 

of the Ludlow Sand & Gravel 

Superfund Site 

AGENCY: United States Environmental 

Protection Agency. 

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