21276 Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules 

III. Publicly Available Documents 

The NRC has posted on 

www.regulations.gov for public 

availability the draft regulatory basis to 

incorporate requirements involving 

station blackout mitigation strategies 

(ADAMS Accession No. ML13077A453). 

The draft regulatory basis documents 

the reasons why the NRC determined 

that rulemaking is the appropriate 

course of action to remedy a regulatory 

shortcoming. 

In addition, in Appendix A, the draft 

regulatory basis provides a discussion of 

rule language concepts that the NRC 

staff is considering for this potential 

rulemaking. Appendix A also contains a 

set of questions soliciting stakeholder 

feedback in areas that would support 

the NRC staff in developing a proposed 

rule. The draft rule concepts provide the 

NRC’s current thoughts about what 

requirements would be needed. The 

draft rule concepts do not represent a 

final NRC staff position nor have they 

been reviewed by the Commission. 

These concepts may undergo significant 

revision during the rulemaking process. 

The NRC is requesting formal public 

comments on the draft regulatory basis 

and the draft rule concepts. The NRC 

may post additional materials to the 

Federal rulemaking Web site at 

www.regulations.gov under Docket ID 

NRC–2011–0299. The Federal 

rulemaking Web site allows you to 

receive alerts when changes or additions 

occur in a docket folder. To subscribe: 

(1) Navigate to the docket folder 

(NRC–2011–0299); (2) click the ‘‘Email 

Alert’’ link; and (3) enter your email 

address and select how frequently you 

would like to receive emails (daily, 

weekly, or monthly). 

Dated at Rockville, Maryland, this 2nd day 

of April, 2013. 

For the Nuclear Regulatory Commission. 

Lawrence E. Kokajko, 

Director, Division of Policy and Rulemaking, 

Office of Nuclear Reactor Regulation. 

[FR Doc. 2013–08216 Filed 4–9–13; 8:45 am] 

BILLING CODE 7590–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0301; Directorate 

Identifier 2013–NM–025–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 767–200, 

–300, –300F, and –400ER series 

airplanes. This proposed AD was 

prompted by reports of cracked and 

corroded nuts on an outboard flap 

support rib. This proposed AD would 

require, for certain airplanes, repetitive 

inspections of the cap seal for damaged 

sealant on nuts common to certain 

outboard flap support ribs, related 

investigative and corrective actions if 

necessary, and replacement of all 

fasteners in the support ribs, which 

terminates the repetitive inspections. 

For certain other airplanes, this 

proposed AD would require repetitive 

inspections of the cap seal for damaged 

sealant on nuts common to certain 

outboard flap support ribs, related 

investigative and corrective actions if 

necessary, and if necessary, a detailed 

inspection to determine the nut type 

installed in the outboard flap support 

rib and corrective actions; for these 

airplanes, this proposed AD provides 

optional replacement of all fasteners in 

the support ribs, which would terminate 

the repetitive inspections. We are 

proposing this AD to detect and correct 

cracked and corroded nuts and bolts 

and the installation of incorrect nuts on 

certain outboard flap support ribs, 

which could lead to additional nut and 

bolt damage in the joint, and result in 

loss of an outboard flap, and adversely 

affect continued safe flight and landing 

of the airplane. 

DATES: We must receive comments on 

this proposed AD by May 28, 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 Boeing 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, 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: 

Berhane Alazar, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue SW., Renton, 

Washington 98057–3356; phone: 425– 

917–6577; fax: 425–917–6590; email: 

berhane.alazar@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– 

2013–0301; Directorate Identifier 2013– 

NM–025–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 received reports that two cracked 

and corroded nuts were found on 

support rib number 2 of an outboard 

flap. It was determined that incorrect 

nuts were installed on support rib 

numbers 2 and 7. The correct nuts for 

this installation have part number (P/N) 

BACN10HR12 and a torque of 3,300 to 

4,300 inch-pounds (in-lbs). The 

installed incorrect nuts have P/N 

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Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules 21277 

NAS1804–12 and a torque of 2,400 to 

3,500 in-lbs. The installed P/N 

NAS1804–12 nuts might have been 

over-torqued. Over-torqued nuts are at 

risk of fracture. Fractured nuts could 

create a breach in the cap seal and allow 

moisture to contact the nuts, resulting in 

corrosion. Nut fractures could lead to 

additional nut or bolt fractures within 

that support rib, and these additional 

fractures could cause the joint to be 

compromised. We are proposing this AD 

to detect and correct cracked and 

corroded nuts and bolts and the 

installation of incorrect nuts on certain 

outboard flap support ribs, which could 

lead to additional nut and bolt damage 

in the joint, and result in loss of an 

outboard flap, and adversely affect 

continued safe flight and landing of the 

airplane. 

Relevant Service Information 

We reviewed Boeing Alert Service 

Bulletin 767–57A0131, dated October 

30, 2012. For information on the 

procedures and compliance times, see 

this service information at http:// 

www.regulations.gov by searching for 

Docket No. FAA–2013–0301. 

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. 

The phrase ‘‘related investigative 

actions’’ might be used in this proposed 

AD. ‘‘Related investigative actions’’ are 

follow-on actions that (1) are related to 

the primary action, and (2) are actions 

that further investigate the nature of any 

condition found. Related investigative 

actions in an AD could include, for 

example, inspections. 

In addition, the phrase ‘‘corrective 

actions’’ might be used in this proposed 

AD. ‘‘Corrective actions’’ are actions 

that correct or address any condition 

found. Corrective actions in an AD 

could include, for example, repairs. 

Costs of Compliance 

We estimate that this proposed AD 

affects 440 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 

Detailed inspections ............................................ 1 work-hour × $85 per hour = $85 .................... $0 $85 $37,400 

Replacement of all fasteners (Group 1 airplanes).2 work-hours × $85 per hour = $170 ................. 2,553 2,723 1,198,120 

We estimate the following costs to do 

any necessary related investigative and 

corrective actions and detailed 

inspections for nut type that would be 

required based on the results of the 

proposed inspections. We have no way 

of determining the number of aircraft 

that might need these actions. 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Related investigative and corrective actions and detailed inspection for nut type.Up to 3 work-hours × $85 per hour = $255 ................... $2,553 Up to $2,808 

According to the manufacturer, some 

of the costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

individuals. We do not control warranty 

coverage for affected individuals. As a 

result, we have included all costs in our 

cost estimate. 

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: 

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21278 Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules 

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– 

2013–0301; Directorate Identifier 2013– 

NM–025–AD. 

(a) Comments Due Date 

We must receive comments by May 28, 

2013. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 767–200, 767–300, 767–300F, and 

767–400ER series airplanes; certificated in 

any category; as identified in Boeing Alert 

Service Bulletin 767–57A0131, dated October 

30, 2012. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 57, Wings. 

(e) Unsafe Condition 

This AD was prompted by reports of 

cracked and corroded nuts on an outboard 

flap support rib. We are issuing this AD to 

detect and correct cracked and corroded nuts 

and bolts and the installation of incorrect 

nuts on certain outboard flap support ribs, 

which could lead to additional nut and bolt 

damage in the joint, and result in loss of an 

outboard flap, and adversely affect continued 

safe flight and landing of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) For Group 1 Airplanes: Repetitive 

Inspections of the Support Ribs, Related 

Investigative and Corrective Actions, and 

Fastener Replacement 

For Group 1 airplanes, as specified in 

Boeing Alert Service Bulletin 767–57A0131, 

dated October 30, 2012: Except as required 

by paragraph (j) of this AD, at the time 

specified in table 1 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 767–57A0131, dated October 30, 

2012: Do a detailed inspection of the cap seal 

for damaged sealant on the nuts common to 

outboard flap support rib numbers 1, 2, 7, 

and 8, and do all applicable related 

investigative and corrective actions, in 

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

767–57A0131, dated October 30, 2012. Do all 

applicable related investigative and 

corrective actions before further flight, except 

as specified in paragraphs (g)(1)(ii) and 

(g)(2)(ii) of this AD. 

(1) If, during any detailed inspection of the 

cap seal required by paragraph (g) of this AD, 

no damaged sealant is found on any support 

rib, do the actions specified in paragraphs 

(g)(1)(i) and (g)(1)(ii) of this AD. 

(i) Repeat the detailed inspection of the cap 

seal on that support rib thereafter at the 

intervals specified in table 1 of paragraph 

1.E., ‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 767–57A0131, dated October 30, 

2012, until all fasteners are replaced within 

that support rib as required by paragraph 

(g)(1)(ii) of this AD. 

(ii) Except as required by paragraph (j) of 

this AD, at the time specified in table 1 of 

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

Alert Service Bulletin 767–57A0131, dated 

October 30, 2012: Replace all fasteners 

within the support rib in accordance with the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 767–57A0131, dated October 

30, 2012. 

(2) If, during any related investigative 

action required by paragraph (g) of this AD, 

no cracking and no corrosion is found on the 

nut, bolt, and washers of any support rib, do 

the actions specified in paragraphs (g)(2)(i) 

and (g)(2)(ii) of this AD. 

(i) Repeat the detailed inspection of the cap 

seal on that support rib thereafter at the 

intervals specified in table 1 of paragraph 

1.E., ‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 767–57A0131, dated October 30, 

2012, until all fasteners are replaced within 

that support rib as required by paragraph 

(g)(2)(ii) of this AD. 

(ii) Except as required by paragraph (j) of 

this AD, at the time specified in table 1 of 

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

Alert Service Bulletin 767–57A0131, dated 

October 30, 2012: Replace all fasteners 

within the support rib in accordance with the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 767–57A0131, dated October 

30, 2012. 

(h) For Group 2 and 3 Airplanes: Repetitive 

Inspections of the Support Ribs, Related 

Investigative and Corrective Actions, and 

Fastener Replacement 

For Group 2 and 3 airplanes, as specified 

in Boeing Alert Service Bulletin 767– 

57A0131, dated October 30, 2012: Except as 

required by paragraph (j) of this AD, at the 

time specified in table 2 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 767–57A0131, dated October 30, 

2012: Do a detailed inspection of the cap seal 

for damaged sealant on the nuts common to 

outboard flap support rib numbers 1, 2, 7, 

and 8, and do all applicable related 

investigative and corrective actions, in 

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

767–57A0131, dated October 30, 2012. Do all 

applicable related investigative and 

corrective actions before further flight. 

(1) If, during any detailed inspection of the 

cap seal required by paragraph (h) of this AD, 

no damaged sealant is found on any support 

rib, do the actions specified in paragraphs 

(h)(1)(i) and (h)(1)(ii) of this AD. 

(i) Repeat the detailed inspection of the cap 

seal on that support rib thereafter at the 

intervals specified in table 1 of paragraph 

1.E., ‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 767–57A0131, dated October 30, 

2012, until the actions required by paragraph 

(h)(1)(ii) of this AD are done or until all 

fasteners are replaced within that support rib 

as specified in paragraph (i) of this AD. 

(ii) Except as required by paragraph (j) of 

this AD, at the time specified in table 2 of 

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

Alert Service Bulletin 767–57A0131, dated 

October 30, 2012: Do a detailed inspection to 

determine the nut type installed in the 

outboard flap support rib and do all 

applicable corrective actions, in accordance 

with the Accomplishment Instructions of 

Boeing Alert Service Bulletin 767–57A0131, 

dated October 30, 2012. Do all applicable 

corrective actions before further flight. 

(2) If, during any related investigative 

action required by paragraph (h) of this AD, 

no cracking and no corrosion is found on the 

nut, bolt, and washers of any support rib, do 

the actions specified in paragraphs (h)(2)(i) 

and (h)(2)(ii) of this AD. 

(i) Repeat the detailed inspection of the cap 

seal on that support rib thereafter at the 

intervals specified in table 2 of paragraph 

1.E., ‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 767–57A0131, dated October 30, 

2012, until the actions required by paragraph 

(h)(2)(ii) of this AD are done or until all 

fasteners are replaced within that support rib 

as specified in paragraph (i) of this AD. 

(ii) Except as required by paragraph (j) of 

this AD, at the time specified in table 2 of 

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

Alert Service Bulletin 767–57A0131, dated 

October 30, 2012: Do a detailed inspection to 

determine the nut type installed in the 

outboard flap support rib and do all 

applicable corrective actions, in accordance 

with the Accomplishment Instructions of 

Boeing Alert Service Bulletin 767–57A0131, 

dated October 30, 2012. Do all applicable 

corrective actions before further flight. 

(i) Replacement of all Fasteners Within 

Outboard Flap Support Ribs 1, 2, 7, and 8 

Replacing all fasteners within outboard 

flap support rib number 1, 2, 7, or 8, in 

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

767–57A0131, dated October 30, 2012, 

terminates the inspections required by 

paragraphs (g) and (h) of this AD for that 

support rib only. 

(j) Exception to Service Information 

Where Boeing Alert Service Bulletin 767– 

57A0131, dated October 30, 2012, specifies a 

compliance time relative to the issue date of 

that service bulletin, this AD requires 

compliance within the specified compliance 

time after the effective date of this AD. 

(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. 

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Federal Register / Vol. 78, No. 69 / Wednesday, April 10, 2013 / Proposed Rules 21279 

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 Berhane Alazar, Aerospace Engineer, 

Airframe Branch, ANM–120S, FAA, Seattle 

Aircraft Certification Office, 1601 Lind 

Avenue SW., Renton, Washington 98057– 

3356; phone: 425–917–6577; fax: 425–917– 

6590; email: berhane.alazar@faa.gov. 

(2) For Boeing 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 also 

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 March 

28, 2013. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2013–08342 Filed 4–9–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0302; Directorate 

Identifier 2013–NM–019–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 supersede an 

existing airworthiness directive (AD) 

that applies to certain The Boeing 

Company Model 737–100 and –200 

series airplanes. The existing AD 

currently requires replacement of 

certain underwing fuel tank access 

covers with stronger, fire-resistant 

covers. Since we issued that AD, we 

received reports of standard access 

doors installed where impact resistant 

access doors are required and reports of 

impact resistant doors without stencils. 

This proposed AD would require 

inspecting fuel tank access doors to 

determine that impact resistant access 

doors are installed in the correct 

locations, inspecting application of 

stencils and index markers of impact 

resistant access doors, corrective actions 

if necessary, revising the maintenance 

program, and adding airplanes to the 

applicability. We are proposing this AD 

to prevent foreign object penetration of 

the wing tank, which could lead to a 

fuel leak near ignition sources (engine, 

hot brakes), consequently leading to a 

fuel-fed fire. 

DATES: We must receive comments on 

this proposed AD by May 28, 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, 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: 

Suzanne Lucier, Aerospace Engineer, 

Propulsion Branch, ANM–140S, FAA, 

Seattle Aircraft Certification Office, 

1601 Lind Avenue SW., Renton, 

Washington 98057–3356; phone: 425– 

917–6438; fax: 425–917–6590; email: 

suzanne.lucier@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–2013–0302; Directorate Identifier 

2013–NM–019–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 December 29, 1986, we issued AD 

87–02–07, Amendment 39–5506 (Docket 

No. 86–NM–175–AD; 52 FR 518–01, 

January 7, 1987), for certain Model 737– 

100 and 737–200 series airplanes. That 

AD requires replacement of certain 

underwing fuel tank access covers with 

stronger, fire-resistant covers. That AD 

resulted from an incident of cover 

penetration, which resulted in a fire and 

total loss of the airplane. We issued that 

AD to prevent foreign object penetration 

of the wing tank, which could lead to a 

fuel leak near ignition sources (engine, 

hot brakes), consequently leading to a 

fuel-fed fire. 

Actions Since Existing AD Was Issued 

Since we issued AD 87–02–07, 

Amendment 39–5506 (Docket No. 86– 

NM–175–AD; 52 FR 518–01, January 7, 

1987), we received reports of standard 

access doors installed where impact 

resistant access doors are required and 

reports of impact resistant doors 

without stencils. 

Relevant Service Information 

We reviewed Boeing Service Bulletin 

737–28–1286, dated January 10, 2012. 

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