Document ID: FAA-2014-0487-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: The Boeing Company Airplanes
Posted Date: 2014-07-29T04:00Z

[Federal Register Volume 79, Number 145 (Tuesday, July 29, 2014)]
[Proposed Rules]
[Pages 43983-43987]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-17781]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2014-0487; Directorate Identifier 2014-NM-026-AD]
RIN 2120-AA64

Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to supersede Airworthiness Directive (AD) 2012-19-
11, which applies to certain The Boeing Company Model 737 airplanes. AD 
2012-19-11 currently requires incorporating design changes to improve 
the reliability of the cabin altitude warning system by installing a 
redundant cabin altitude pressure switch, replacing the aural warning 
module (AWM) with a new or reworked AWM, and changing certain wire 
bundles or connecting certain previously capped and stowed wires as 
necessary. For certain airplanes, AD 2012-19-11 also requires prior or 
concurrent incorporation of related design changes by modifying the 
instrument panels, installing light assemblies, modifying the wire 
bundles, and installing a new circuit breaker, as necessary. Since we 
issued AD 2012-19-11, we have determined that certain airplanes were 
not included in the requirement to incorporate related design changes. 
This proposed AD would add, for certain airplanes, a requirement to 
incorporate related design changes. This proposed AD also, for certain 
airplanes, no longer gives credit for accomplishing certain previous 
actions. We are proposing this AD to prevent the loss of cabin altitude 
warning, which could delay flightcrew recognition of a lack of cabin 
pressurization, and could result in incapacitation of the flightcrew 
due to hypoxia (a lack of oxygen in the body), and consequent loss of 
control of the airplane.

DATES: We must receive comments on this proposed AD by September 12, 
2014.

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 view this referenced service information 
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW.,

[[Page 43984]]

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 by searching for and locating Docket No. FAA-2014-
0487; 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: Francis Smith, Aerospace Engineer, 
Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle 
Aircraft Certification Office, 1601 Lind Avenue SW., Renton, WA 98057-
3356; phone: 425-917-6596; fax: 425-917-6590; email: 
Francis.Smith@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-2014-0487; 
Directorate Identifier 2014-NM-026-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 September 19, 2012, we issued AD 2012-19-11, Amendment 39-17206 
(77 FR 60296, October 3, 2012), for certain The Boeing Company Model 
737 airplanes. AD 2012-19-11 requires incorporating design changes to 
improve the reliability of the cabin altitude warning system by 
installing a redundant cabin altitude pressure switch, replacing the 
AWM with a new or reworked AWM, and changing certain wire bundles or 
connecting certain previously capped and stowed wires as necessary. For 
certain airplanes, AD 2012-19-11 also requires prior or concurrent 
incorporation of related design changes by modifying the instrument 
panels, installing light assemblies, modifying the wire bundles, and 
installing a new circuit breaker, as necessary. AD 2012-19-11 resulted 
from a report of a flightcrew not receiving an aural warning during a 
lack of cabin pressurization event. We issued AD 2012-19-11 to prevent 
the loss of cabin altitude warning, which could delay flightcrew 
recognition of a lack of cabin pressurization, and could result in 
incapacitation of the flightcrew due to hypoxia (a lack of oxygen in 
the body), and consequent loss of control of the airplane.

Other Related Rulemaking

    The concurrent actions for AD 2012-19-11, Amendment 39-17206 (77 FR 
60296, October 3, 2012), are the primary corrective actions for AD 
2011-03-14, Amendment 39-16598 (76 FR 6529, February 7, 2011), and AD 
2013-02-05, Amendment 39-17326 (78 FR 6202, January 30, 2013). AD 2011-
03-14 and AD 2013-02-05 provide the necessary wiring configuration to 
perform the corrective actions for AD 2012-19-11. AD 2011-03-14 (for 
certain Model 737-100, -200, -200C, -300, -400, and -500 series 
airplanes) and AD 2013-02-05 (for certain Model 737-600, -700, -700C, -
800, -900, and -900ER series airplanes) were issued to prevent failure 
of the flightcrew to recognize and react to a valid cabin altitude 
warning horn, which could result in incapacitation of the flightcrew 
due to hypoxia (a lack of oxygen in the body), and consequent loss of 
control of the airplane.

Actions Since AD 2012-19-11, Amendment 39-17206 (77 FR 60296, October 
3, 2012), Was Issued

    Since we issued AD 2012-19-11, Amendment 39-17206 (77 FR 60296, 
October 3, 2012), we have reviewed new service information for the 
actions required by paragraph (g) of AD 2012-19-11, which refers to 
Boeing Special Attention Service Bulletin 737-21-1164, Revision 1, 
dated May 17, 2012, as one of the appropriate sources of service 
information. Boeing Special Attention Service Bulletin 737-21-1164, 
Revision 2, dated August 23, 2013, provides essentially the same 
procedure for accomplishing the actions, except for certain airplanes, 
Boeing Special Attention Service Bulletin 737-21-1164, Revision 2, 
dated August 23, 2013, specifies to contact the manufacturer for the 
installation and replacement of certain wire bundles.
    We also have reviewed new service information for the concurrent 
actions required by paragraph (h) of AD 2012-19-11, Amendment 39-17206 
(77 FR 60296, October 3, 2012), which refers to Boeing Alert Service 
Bulletin 737-31A1325, dated January 11, 2010; and Boeing Alert Service 
Bulletin 737-31A1332, Revision 3, dated March 28, 2012; as the 
appropriate sources of service information. Boeing Alert Service 
Bulletin 737-31A1325, Revision 1, dated July 5, 2012; and Boeing Alert 
Service Bulletin 737-31A1332, Revision 4, dated October 31, 2013; 
provide essentially the same procedures for accomplishing the 
concurrent actions, except, for certain airplanes, Boeing Alert Service 
Bulletin 737-31A1325, Revision 1, dated July 5, 2012, specifies to 
contact the manufacturer for modification, installation, and repair 
instructions. Boeing Alert Service Bulletin 737-31A1332, Revision 4, 
dated October 31, 2013, also specified that airplanes having line 
numbers YA091 through YA097 were inadvertently removed from Boeing 
Alert Service Bulletin 737-31A1332, Revision 3, dated March 28, 2012, 
and are now included in Group 1 airplanes as identified in Boeing Alert 
Service Bulletin 737-31A1332, Revision 4, dated October 31, 2013.
    In addition, we are also correcting a typographical error in 
paragraph (i)(1) of AD 2012-19-11, Amendment 39-17206 (77 FR 60296, 
October 3, 2012), which refers to paragraph (h) of that AD; paragraph 
(i)(1) of AD 2012-19-11 should refer to paragraph (g) of that AD. 
Operators that accomplished Boeing Special Attention Service Bulletin 
737-21-1165, Revision 1, dated July 16, 2010, get credit for the 
actions in paragraph (g) of this AD; operators cannot get credit for 
the concurrent actions required by paragraph (h) of this AD because 
they cannot accomplish the concurrent actions using Boeing Special 
Attention Service Bulletin 737-21-1165, Revision 1, dated July 16, 
2010.
    We have revised paragraphs (i)(2) through (i)(4) of AD 2012-19-11, 
Amendment 39-17206 (77 FR 60296, October 3, 2012), to specify certain 
airplane variable numbers to clearly identify the airplanes that are 
allowed to receive credit for previous actions using certain service 
information and to match the information specified in AD 2013-02-05, 
Amendment 39-17326 (78 FR 6202, January 30, 2013). The airplanes 
identified in paragraphs (j)(2) through (j)(4) of this proposed AD 
match the airplanes specified in paragraphs (i)(1) through (i)(3) of AD 
2013-02-05; these

[[Page 43985]]

paragraphs give credit for doing actions specified in Boeing Alert 
Service Bulletin 737-31A1332, Revision 1, dated June 24, 2010; and 
Boeing Alert Service Bulletin 737-31Al332, Revision 2, dated August 18, 
2011.
    However, airplanes having variable numbers YA001 through YA008, 
YA251, YA501 through YA508, and YC321 through YC325, were allowed to 
take credit for actions as specified in paragraph (i)(2) and (i)(3) of 
AD 2012-19-11, Amendment 39-17206 (77 FR 60296, October 3, 2012). 
Airplanes having variable numbers YA001 through YA008, YA251, YA501 
through YA508, and YC321 through YC325 are now excluded from the credit 
for doing certain actions given in paragraphs (j)(2) and (j)(3) of this 
proposed AD; therefore, we have provided a new compliance time for 
those airplanes in paragraph (i) of this AD.

Relevant Service Information

    We reviewed the following service information:
     Boeing Special Attention Service Bulletin 737-21-1164, 
Revision 2, dated August 23, 2013.
     Boeing Alert Service Bulletin 737-31A1325, Revision 1, 
dated July 5, 2012.
     Boeing Alert Service Bulletin 737-31A1332, Revision 4, 
dated October 31, 2013.
    For information on the procedures and compliance times, see this 
service information at http://www.regulations.gov by searching for and 
locating Docket No. FAA-2014-0487.

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Proposed AD Requirements

    This proposed AD would retain all requirements of AD 2012-19-11, 
Amendment 39-17206 (77 FR 60296, October 3, 2012). This proposed AD 
would add, for certain airplanes, a requirement to incorporate related 
design changes. This proposed AD also, for certain airplanes, no longer 
gives credit for accomplishing certain previous actions.

Differences Between This Proposed AD and the Service Information

    Boeing Special Attention Service Bulletin 737-21-1164, Revision 2, 
dated August 23, 2013; and Boeing Alert Service Bulletin 737-31A1325, 
Revision 1, dated July 5, 2012; specify to contact the manufacturer for 
instructions on how to repair certain conditions, but this proposed AD 
would require repairing those conditions 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 (ODA) whom we have 
authorized to make those findings.

Costs of Compliance

    We estimate that this proposed AD affects 1,618 airplanes of U.S. 
registry.
    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                            Parts        Cost per
             Action                     Labor cost           cost        product        Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Install a redundant cabin         Up to 62 work-hours x     $33,576  Up to $38,846..  Up to $62,852,828.
 altitude pressure switch,         $85 per hour = up to
 replace the AWM with a new or     $5,270.
 reworked AWM, change certain
 wire bundles or connect certain
 capped and stowed wires
 [retained actions from AD 2012-
 19-11, Amendment 39-17206 (77
 FR 60296, October 3, 2012), for
 1,618 airplanes].
Modify the instrument panels,     Up to 92 work-hours x       5,292  Up to $13,112..  Up to $20,926,752.
 install light assemblies,         $85 per hour = up to
 modify the wire bundles, and      $7,820.
 install a new circuit breaker
 (concurrent requirements)
 [retained actions from AD 2012-
 19-11, Amendment 39-17206 (77
 FR 60296, October 3, 2012), for
 1,596 airplanes].
Modify the instrument panels,     Up to 92 work-hours x       5,292  Up to $13,112..  Up to $288,464.
 install light assemblies,         $85 per hour = up to
 modify the wire bundles, and      $7,820.
 install a new circuit breaker
 (concurrent requirements) [new
 actions for 22 airplanes].
----------------------------------------------------------------------------------------------------------------

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We have determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that the proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the DOT Regulatory Policies 
and 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.

[[Page 43986]]

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

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2012-19-11, Amendment 39-17206 (77 FR 60296, October 3, 2012), and 
adding the following new AD:

The Boeing Company: Docket No. FAA-2014-0487; Directorate Identifier 
2014-NM-026-AD.

(a) Comments Due Date

    The FAA must receive comments on this AD action by September 12, 
2014.

(b) Affected ADs

    This AD replaces AD 2012-19-11, Amendment 39-17206 (77 FR 60296, 
October 3, 2012).

(c) Applicability

    This AD applies to The Boeing Company airplanes, certificated in 
any category, as identified in paragraphs (c)(1) and (c)(2) of this 
AD.
    (1) Model 737-100, -200, -200C, -300, -400, and -500 series 
airplanes, as identified in Boeing Special Attention Service 
Bulletin 737-21-1164, Revision 2, dated August 23, 2013.
    (2) Model 737-600, -700, -700C, -800, -900, and -900ER series 
airplanes, as identified in Boeing Special Attention Service 
Bulletin 737-21-1165, Revision 1, dated July 16, 2010, as revised by 
Boeing Special Attention Service Bulletin 737-21-1165, Revision 2, 
dated April 30, 2012.

(d) Subject

    Air Transport Association (ATA) of America Code 21, Air 
Conditioning.

(e) Unsafe Condition

    This AD was prompted by the report of a flightcrew not receiving 
an aural warning during a lack of cabin pressurization event. We are 
issuing this AD to prevent the loss of cabin altitude warning, which 
could delay flightcrew recognition of a lack of cabin 
pressurization, and could result in incapacitation of the flightcrew 
due to hypoxia (a lack of oxygen in the body), and consequent loss 
of control of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Retained Installation

    This paragraph restates the actions required by paragraph (g) of 
AD 2012-19-11, Amendment 39-17206 (77 FR 60296, October 3, 2012), 
with revised service information. Within 72 months after November 7, 
2012 (the effective date of AD 2012-19-11), install a redundant 
cabin altitude pressure switch, replace the aural warning module 
(AWM) with a new or reworked AWM, and change certain wire bundles or 
connect certain capped and stowed wires, as applicable, in 
accordance with the Accomplishment Instructions of the applicable 
service information in paragraphs (g)(1) and (g)(2) of this AD; 
except as provided by paragraph (k)(1) of this AD.
    (1) Boeing Special Attention Service Bulletin 737-21-1164, 
Revision 1, dated May 17, 2012; or Boeing Special Attention Service 
Bulletin 737-21-1164, Revision 2, dated August 23, 2013 (for Model 
737-100, -200, -200C, -300, -400, and -500 series airplanes). As of 
the effective date of this AD, use Boeing Special Attention Service 
Bulletin 737-21-1164, Revision 2, dated August 23, 2013, for the 
actions specified in paragraph (g) of this AD.
    (2) Boeing Special Attention Service Bulletin 737-21-1165, 
Revision 1, dated July 16, 2010, as revised by Boeing Special 
Attention Service Bulletin 737-21-1165, Revision 2, dated April 30, 
2012 (for Model 737-600, -700, -700C, -800, -900, and -900ER series 
airplanes).

(h) Retained Concurrent Actions

    This paragraph restates the concurrent actions required by 
paragraph (h) of AD 2012-19-11, Amendment 39-17206 (77 FR 60296, 
October 3, 2012), with revised service information. For airplanes 
identified in Boeing Alert Service Bulletin 737-31A1325, dated 
January 11, 2010 (for Model 737-100, -200, -200C, -300, -400, and -
500 series airplanes); and Boeing Alert Service Bulletin 737-
31A1332, Revision 3, dated March 28, 2012 (for Model 737-600, -700, 
-700C, -800, -900, and -900ER series airplanes); except as provided 
by paragraph (i) of this AD: Before or concurrently with 
accomplishment of the actions specified in paragraph (g) of this AD, 
as applicable, modify the instrument panels, install light 
assemblies, modify the wire bundles, and install a new circuit 
breaker, in accordance with the Accomplishment Instructions of the 
applicable service information in paragraphs (h)(1) and (h)(2) of 
this AD; except as provided by paragraph (k)(2) of this AD.
    (1) Boeing Alert Service Bulletin 737-31A1325, dated January 11, 
2010, or Boeing Alert Service Bulletin 737-31A1325, Revision 1, 
dated July 5, 2012 (for Model 737-100, -200, -200C, -300, -400, and 
-500 series airplanes). As of the effective date of this AD, use 
Boeing Alert Service Bulletin 737-31A1325, Revision 1, dated July 5, 
2012 (for Model 737-100, -200, -200C, -300, -400, and -500 series 
airplanes), for the actions specified in paragraph (h) of this AD.
    (2) Boeing Alert Service Bulletin 737-31A1332, Revision 3, dated 
March 28, 2012; or Boeing Alert Service Bulletin 737-31A1332, 
Revision 4, dated October 31, 2013 (for Model 737-600, -700, -700C, 
-800, -900, and -900ER series airplanes). As of the effective date 
of this AD, use Boeing Alert Service Bulletin 737-31A1332, Revision 
4, dated October 31, 2013 (for Model 737-600, -700, -700C, -800, -
900, and -900ER series airplanes), for the actions specified in 
paragraph (h) of this AD.

(i) New Concurrent Requirement

    For airplanes having variable numbers YA001 through YA008 
inclusive, YA251, YA501 through YA508 inclusive, and YC321 through 
YC325 inclusive: Before or concurrently with accomplishment of the 
actions specified in paragraph (g) of this AD, or within 18 months 
after the effective date of this AD, whichever occurs later, modify 
the instrument panels, install light assemblies, modify the wire 
bundles, and install a new circuit breaker, in accordance with the 
Accomplishment Instructions of Boeing Alert Service Bulletin 737-
31A1332, Revision 4, dated October 31, 2013.

(j) Credit for Previous Actions

    This paragraph restates the credit for previous actions stated 
in paragraph (i) of AD 2012-19-11, Amendment 39-17206 (77 FR 60296, 
October 3, 2012), with correct paragraph reference and revised 
exempted airplanes.
    (1) This paragraph provides credit for the actions required by 
paragraph (g) of this AD, if those actions were performed before 
November 7, 2012 (the effective date of AD 2012-19-11, Amendment 39-
17206 (77 FR 60296, October 3, 2012)), using Boeing Special 
Attention Service Bulletin 737-21-1165, Revision 1, dated July 16, 
2010.
    (2) For airplanes identified in Boeing Alert Service Bulletin 
737-31A1332, Revision 1, dated June 24, 2010; except airplanes 
having variable numbers YA001 through YA019 inclusive, YA201 through 
YA203 inclusive, YA231 through YA242 inclusive, YA251, YA252, YA271, 
YA272, YA301, YA302, YA311, YA312, YA501 through YA508 inclusive, 
YA541, YA701, YA702, YC001 through YC007 inclusive, YC051, YC052, 
YC101, YC102, YC111, YC121, YC301, YC302, YC321 through YC330 
inclusive, YC381, YC401 through YC403 inclusive, YC501, YC502, and 
YE001 through YE003 inclusive: This paragraph provides credit for 
the actions required by paragraph (h) of this AD, if those actions 
were performed before the effective date of this AD using Boeing 
Alert Service Bulletin 737-31A1332, Revision 1, dated June 24, 2010.
    (3) For airplanes identified in Boeing Alert Service Bulletin 
737-31A1332, Revision 2, dated August 18, 2011; except airplanes 
identified in paragraph (j)(4) of this AD and airplanes having 
variable numbers YA001 through YA019 inclusive, YA201 through YA203 
inclusive, YA231through YA242 inclusive, YA251, YA252, YA271, YA272, 
YA301, YA302, YA311, YA312, YA501 through YA508 inclusive, YA541, 
YA701, YA702, YC001 through YC007 inclusive, YC051, YC052, YC101, 
YC102, YC111,

[[Page 43987]]

YC121, YC301, YC302, YC321 through YC330 inclusive, YC381, YC401 
through YC403 inclusive, YC501, YC502, and YE001 through YE003 
inclusive: This paragraph provides credit for the actions required 
by paragraph (h) of this AD, if those actions were performed before 
the effective date of this AD using Boeing Alert Service Bulletin 
737-31A1332, Revision 2, dated August 18, 2011.
    (4) For Group 21, Configuration 2 airplanes identified in Boeing 
Alert Service Bulletin 737-31A1332, Revision 3, dated March 28, 
2012: This paragraph provides credit for the actions required by 
paragraph (h) of this AD, if those actions were performed before the 
effective date of this AD using Boeing Alert Service Bulletin 737-
31A1332, Revision 2, dated August 18, 2011, and provided that the 
actions specified in Boeing Service Bulletin 737-21-1171, dated 
February 12, 2009, were accomplished prior to or concurrently with 
the actions specified in Boeing Alert Service Bulletin 737-31A1332, 
Revision 2, dated August 18, 2011.

(k) New Requirements to This AD: Exceptions to the Service Information

    (1) Where Boeing Special Attention Service Bulletin 737-21-1164, 
Revision 2, dated August 23, 2013, specifies to contact Boeing for 
instructions: Before further flight, repair using a method approved 
in accordance with the procedures specified in paragraph (l) of this 
AD.
    (2) Where Boeing Alert Service Bulletin 737-31A1325, Revision 1, 
dated July 5, 2012, specifies to contact Boeing for instructions: 
Before further flight, repair using a method approved in accordance 
with the procedures specified in paragraph (l) of 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)(1) 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.
    (4) AMOCs approved for AD 2012-19-11, Amendment 39-17206 (77 FR 
60296, October 3, 2012), are approved as AMOCs for the corresponding 
provisions of this AD.

(m) Related Information

    (1) For more information about this AD, contact Francis Smith, 
Aerospace Engineer, Cabin Safety and Environmental Systems Branch, 
ANM-150S, FAA, Seattle Aircraft Certification Office, 1601 Lind 
Avenue SW., Renton, WA 98057-3356; phone: 425-917-6596; fax: 425-
917-6590; email: Francis.Smith@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 view this 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 July 16, 2014.
John P. Piccola,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2014-17781 Filed 7-28-14; 8:45 am]
BILLING CODE 4910-13-P