[Federal Register Volume 85, Number 11 (Thursday, January 16, 2020)]
[Rules and Regulations]
[Pages 2624-2627]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2020-00580]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0326; Product Identifier 2018-NM-166-AD; Amendment 
39-19808; AD 2019-23-14]
RIN 2120-AA64


Airworthiness Directives; The Boeing Company Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; correction.

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SUMMARY: The FAA is correcting an airworthiness directive (AD) that 
published in the Federal Register. That AD applies to all The Boeing 
Company Model 737-100, -200, -200C, -300, -400, and -500 series 
airplanes. As published, the service information reference specified in 
a certain paragraph of the regulatory text is incorrect. This document 
corrects that error. In all other respects, the original document 
remains the same.

DATES: This correction is effective January 21, 2020.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of January 21, 
2020 (84 FR 68326, December 16, 2019).

ADDRESSES: For service information identified in this final rule, 
contact Boeing Commercial Airplanes, Attention: Contractual & Data 
Services (C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 
90740-5600; phone: 562-797-1717; internet: https://www.myboeingfleet.com. You may view this referenced service information 
at the FAA, Transport Standards Branch, 2200 South 216th St., Des 
Moines, WA. For information on the availability of this material at the 
FAA, call 206-231-3195. It is also available on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2019-
0326.

Examining the AD Docket

    You may examine the AD docket on the internet at https://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 AD, the regulatory evaluation, 
any comments received, and other information. The address for Docket 
Operations is Docket Management Facility, U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Serj Harutunian, Aerospace Engineer, 
Propulsion Section, FAA, Los Angeles ACO Branch, 3960 Paramount 
Boulevard, Lakewood, CA 90712-4137; phone: 562-627-5254; fax: 562-627-
5210; email: serj.harutunian@faa.gov.

SUPPLEMENTARY INFORMATION: As published, AD 2019-23-14, Amendment 39-
19808 (84 FR 68326, December 16, 2019), requires revising the existing 
maintenance or inspection program, as applicable, to include new or 
revised airworthiness limitations (AWLs) for all The Boeing Company 
Model 737-100, -200, -200C, -300, -400, and -500 series airplanes.

Need for the Correction

    As published, the service information reference specified in the 
paragraph (g)(2)(ix) of the regulatory text is incorrect. Paragraph 
(g)(2)(ix) of the regulatory text incorrectly references the actions 
specified in Boeing Service Bulletin 737-28A1228 for the initial 
compliance time to accomplish AWL No. 28-AWL-31, ``Cushion Clamps and 
Teflon Sleeving Installed on Out-of-Tank Wire Bundles Installed on 
Brackets that are Mounted Directly on the Fuel Tanks,'' however, the 
correct reference for that initial compliance time is Boeing Service 
Bulletin 737-57A1321. Boeing Service Bulletin 737-28A1228 does not 
refer to AWL No. 28-AWL-31. AWL No. 28-AWL-31 is only referenced in 
Boeing Service Bulletin 737-57A1321.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Boeing 737-100/200/200C/300/400/500 Airworthiness 
Limitations (AWLs) and Certification Maintenance Requirements (CMRs), 
D6-38278-CMR, dated March 2019. This service information describes AWLs 
that include airworthiness limitation instructions (ALI) and critical 
design configuration control limitations (CDCCL) tasks related to fuel 
tank ignition prevention and the nitrogen generation system. This 
service information is reasonably available because the interested 
parties have access to it through their normal course of business or by 
the means identified in the ADDRESSES section.

Correction of Publication

    This document corrects an error and correctly adds the AD as an 
amendment to 14 CFR 39.13. Although no other part of the preamble or 
regulatory information has been corrected, the

[[Page 2625]]

FAA is publishing the entire rule in the Federal Register.
    The effective date of this AD remains January 21, 2020.
    Since this action only corrects a reference, it has no adverse 
economic impact and imposes no additional burden on any person. 
Therefore, the FAA has determined that notice and public comment 
procedures are unnecessary.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Correction

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration amends part 39 of 
the Federal Aviation Regulations (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   [Corrected]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2019-23-14: The Boeing Company: Amendment 39-19808; Docket No. FAA-
2019-0326; Product Identifier 2018-NM-166-AD.

(a) Effective Date

    This AD is effective January 21, 2020.

(b) Affected ADs

    This AD affects the ADs specified in paragraphs (b)(1) through 
(7) of this AD.
    (1) AD 2008-10-09 R1, Amendment 39-16148 (74 FR 69264, December 
31, 2009) (``AD 2008-10-09 R1'').
    (2) AD 2011-12-09, Amendment 39-16716 (76 FR 33988, June 10, 
2011) (``AD 2011-12-09'').
    (3) AD 2013-13-15, Amendment 39-17503 (78 FR 42415, July 16, 
2013) (``AD 2013-13-15'').
    (4) AD 2013-25-05, Amendment 39-17701 (78 FR 78701, December 27, 
2013) (``AD 2013-25-05'').
    (5) AD 2016-18-16, Amendment 39-18647 (81 FR 65864, September 
26, 2016) (``AD 2016-18-16'').
    (6) AD 2017-17-09, Amendment 39-18999 (82 FR 40477, August 25, 
2017) (``AD 2017-17-09'').
    (7) AD 2018-04-12, Amendment 39-19208 (83 FR 9178, March 5, 
2018) (``AD 2018-04-12'').

(c) Applicability

    This AD applies to all The Boeing Company Model 737-100, -200, -
200C, -300, -400, and -500 series airplanes, certificated in any 
category.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel; 47, 
Nitrogen Generation System.

(e) Unsafe Condition

    This AD was prompted by a determination that new or revised 
airworthiness limitations (AWLs) are necessary related to fuel tank 
ignition prevention and the nitrogen generation system. The FAA is 
issuing this AD to address the potential of ignition sources inside 
fuel tanks, which, in combination with flammable fuel vapors, could 
result in fuel tank explosions and consequent loss of the airplane.

(f) Compliance

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

(g) Maintenance or Inspection Program Revision

    (1) For The Boeing Company Model 737-100, -200, and -200C series 
airplanes: Within 60 days after the effective date of this AD, 
revise the existing maintenance or inspection program, as 
applicable, to incorporate the information specified in Section C, 
including Subsections C.1, C.2, and C.3 of Boeing 737-100/200/200C/
300/400/500 Airworthiness Limitations (AWLs) and Certification 
Maintenance Requirements (CMRs), D6-38278-CMR, dated March 2019, 
except as provided in paragraph (h) of this AD. The initial 
compliance time for the ALI tasks are within the applicable 
compliance times specified in paragraphs (g)(1)(i) through (x) of 
this AD.
    (i) For AWL No. 28-AWL-01, ``External Wires Over Center Fuel 
Tank'': Within 120 months after the most recent inspection was 
performed as specified in AWL No. 28-AWL-01, or within 12 months 
after the effective date of this AD if no initial inspection has 
been performed.
    (ii) For AWL No. 28-AWL-03, ``Fuel Quantity Indicating System 
(FQIS)--Out Tank Wiring Lightning Shield to Ground Termination'': 
Within 120 months after accomplishment of the actions specified in 
Boeing Service Bulletin 737-28A1178, or within 120 months after the 
most recent inspection was performed as specified in AWL No. 28-AWL-
03, whichever is later.
    (iii) For AWL No. 28-AWL-21, ``Center Tank Fuel Boost Pump 
Automatic Shutoff System'': Within 12 months after accomplishment of 
the actions specified in Boeing Service Bulletin 737-28A1228, or 
within 12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-21, whichever is later.
    (iv) For AWL No. 28-AWL-22, ``Auxiliary Tank Fuel Boost Pump 
Automatic Shutoff System'': Within 12 months after accomplishment of 
the actions specified in Boeing Service Bulletin 737-28A1228, or 
within 12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-22, whichever is later.
    (v) For AWL No. 28-AWL-23, ``Over-Current and Arcing Protection 
Electrical Design Features Operation--Boost Pump Ground Fault 
Interrupter (GFI)'': Within 12 months after accomplishment of the 
actions specified in Boeing Service Bulletin 737-28A1212, or within 
12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-23, whichever is later.
    (vi) For AWL No. 28-AWL-24, ``Center Tank Fuel Boost Pump Power 
Failed On Protection System'': Within 12 months after accomplishment 
of the actions specified in Boeing Service Bulletin 737-28A1227, or 
within 12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-24, whichever is later.
    (vii) For AWL No. 28-AWL-25, ``Auxiliary Fuel Tank Boost Pump 
Power Failed On Protection System'': Within 12 months after 
accomplishment of the actions specified in Boeing Service Bulletin 
737-28A1227, or within 12 months after the most recent inspection 
was performed as specified in AWL No. 28-AWL-25, whichever is later.
    (viii) For AWL No. 28-AWL-29, ``AC Fuel Boost Pump 
Installation'': Within 72 months after the most recent inspection 
was performed as specified in AWL No. 28-AWL-29, or within 12 months 
after the effective date of this AD if no inspection has been 
performed in the last 72 months.
    (ix) For AWL No. 47-AWL-04, ``Nitrogen Generation System (NGS)--
Thermal Switch'': Within 22,500 flight hours after accomplishment of 
the actions specified in Boeing Service Bulletin 737-47-1005; within 
22,500 flight hours after accomplishment of the actions specified in 
Boeing Service Bulletin 737-47-1008; or within 22,500 flight hours 
after the most recent inspection was performed as specified in AWL 
No. 47-AWL-04; whichever is latest.
    (x) For AWL No. 47-AWL-05, ``Nitrogen Generation System (NGS)--
Nitrogen Enriched Air (NEA) Distribution Ducting Integrity'': Within 
14,500 flight hours after accomplishment of the actions specified in 
Boeing Service Bulletin 737-47-1005; within 14,500 flight hours 
after accomplishment of the actions specified in Boeing Service 
Bulletin 737-47-1008; or within 14,500 flight hours after the most 
recent inspection was performed as specified in AWL No. 47-AWL-05; 
whichever is latest.
    (2) For The Boeing Company Model 737-300, -400, and -500 series 
airplanes: Within 60 days after the effective date of this AD, 
revise the existing maintenance or inspection program, as 
applicable, to incorporate the information specified in Section C, 
including Subsections C.1, C.2, and C.3 of Boeing 737-100/200/200C/
300/400/500 Airworthiness Limitations (AWLs) and Certification 
Maintenance Requirements (CMRs), D6-38278-CMR, dated March 2019; 
except as provided in paragraph (h) of this AD. The initial 
compliance time for the ALI tasks are within the applicable 
compliance times specified in paragraphs (g)(2)(i) through (xi) of 
this AD.
    (i) For AWL No. 28-AWL-01, ``External Wires Over Center Fuel 
Tank'': Within 120 months after the most recent inspection was 
performed as specified in AWL No. 28-AWL-01, or within 12 months 
after the effective date of this AD if no initial inspection has 
been performed.

[[Page 2626]]

    (ii) For AWL No. 28-AWL-03, ``Fuel Quantity Indicating System 
(FQIS)--Out Tank Wiring Lightning Shield to Ground Termination'': 
Within 120 months after accomplishment of the actions specified in 
Boeing Service Bulletin 737-28A1175; within 120 months after 
accomplishment of the actions specified in Boeing Service Bulletin 
737-28A1183; within 120 months after accomplishment of the actions 
specified in Boeing Service Bulletin 737-28A1186; or within 120 
months after the most recent inspection was performed as specified 
in AWL No. 28-AWL-03; whichever is latest.
    (iii) For AWL No. 28-AWL-20, ``Center Tank Fuel Boost Pump 
Automatic Shutoff System'': Within 12 months after accomplishment of 
the actions specified in Boeing Service Bulletin 737-28A1216, or 
within 12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-20, whichever is later.
    (iv) For AWL No. 28-AWL-21, ``Auxiliary Tank Fuel Boost Pump 
Automatic Shutoff System'': Within 12 months after accomplishment of 
the actions specified in Boeing Service Bulletin 737-28A1216, or 
within 12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-21, whichever is later.
    (v) For AWL No. 28-AWL-22, ``Over-Current and Arcing Protection 
Electrical Design Features Operation--Boost Pump Ground Fault 
Interrupter (GFI)'': Within 12 months after accomplishment of the 
actions specified in Boeing Service Bulletin 737-28A1212, or within 
12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-22, whichever is later.
    (vi) For AWL No. 28-AWL-23, ``Center Tank Fuel Boost Pump Power 
Failed On Protection System'': Within 12 months after accomplishment 
of the actions specified in Boeing Service Bulletin 737-28A1227, or 
within 12 months after the most recent inspection was performed as 
specified in AWL No. 28-AWL-23, whichever is later.
    (vii) For AWL No. 28-AWL-24, ``Auxiliary Fuel Tank Boost Pump 
Power Failed On Protection System'': Within 12 months after 
accomplishment of the actions specified in Boeing Service Bulletin 
737-28A1227, or within 12 months after the most recent inspection 
was performed as specified in AWL No. 28-AWL-24, whichever is later.
    (viii) For AWL No. 28-AWL-27, ``AC Fuel Boost Pump 
Installation'': Within 72 months after the most recent inspection 
was performed as specified in AWL No. 28-AWL-27, or within 12 months 
after the effective date of this AD if no inspection has been 
performed in the last 72 months.
    (ix) For AWL No. 28-AWL-31, ``Cushion Clamps and Teflon Sleeving 
Installed on Out-of-Tank Wire Bundles Installed on Brackets that are 
Mounted Directly on the Fuel Tanks'': Within 144 months after 
accomplishment of the actions specified in Boeing Service Bulletin 
737-57A1321.
    (x) For AWL No. 47-AWL-04, ``Nitrogen Generation System (NGS)--
Thermal Switch'': Within 22,500 flight hours after accomplishment of 
the actions specified in Boeing Service Bulletin 737-47-1005; within 
22,500 flight hours after accomplishment of the actions specified in 
Boeing Service Bulletin 737-47-1008; or within 22,500 flight hours 
after the most recent inspection was performed as specified in AWL 
No. 47-AWL-04; whichever is latest.
    (xi) For AWL No. 47-AWL-05, ``Nitrogen Generation System (NGS)--
Nitrogen Enriched Air (NEA) Distribution Ducting Integrity'': Within 
14,500 flight hours after accomplishment of the actions specified in 
Boeing Service Bulletin 737-47-1005; within 14,500 flight hours 
after accomplishment of the actions specified in Boeing Service 
Bulletin 737-47-1008; or within 14,500 flight hours after the most 
recent inspection was performed as specified in AWL No. 47-AWL-05; 
whichever is latest.

(h) Additional Acceptable Wire Types and Sleeving

    As an option to accomplishing the actions required by paragraph 
(g) of this AD, the changes specified in paragraphs (h)(1) and (2) 
of this AD are acceptable.
    (1) Where AWL No. 28-AWL-05 identifies wire types BMS 13-48, BMS 
13-58, and BMS 13-60, the following wire types are acceptable: MIL-
W-22759/16, SAE AS22759/16 (M22759/16), MIL-W-22759/32, SAE AS22759/
32 (M22759/32), MIL-W-22759/34, SAE AS22759/34 (M22759/34), MIL-W-
22759/41, SAE AS22759/41 (M22759/41), MIL-W-22759/86, SAE AS22759/86 
(M22759/86), MIL-W-22759/87, SAE AS22759/87 (M22759/87), MIL-W-
22759/92, and SAE AS22759/92 (M22759/92); and MIL-C-27500 and NEMA 
WC 27500 cables constructed from these military or SAE specification 
wire types, as applicable.
    (2) Where AWL No. 28-AWL-05 identifies TFE-2X Standard wall for 
wire sleeving, the following sleeving materials are acceptable: 
Roundit 2000NX and Varglas Type HO, HP, or HM.

(i) No Alternative Actions, Intervals, or Critical Design Configuration 
Control Limitations (CDCCLs)

    After the existing maintenance or inspection program has been 
revised as required by paragraph (g) of this AD, no alternative 
actions (e.g., inspections), intervals, or CDCCLs may be used unless 
the actions, intervals, and CDCCLs are approved as an alternative 
method of compliance (AMOC) in accordance with the procedures 
specified in paragraph (k) of this AD.

(j) Terminating Actions for Certain AD Requirements

    Accomplishment of the revision required by paragraph (g) of this 
AD terminates the requirements specified in paragraphs (j)(1) 
through (7) of this AD for that airplane:
    (1) All requirements of AD 2008-10-09 R1.
    (2) The revision required by paragraph (l) of AD 2011-12-09.
    (3) The revision required by paragraph (h) of AD 2013-13-15.
    (4) The revision required by paragraph (j) of AD 2013-25-05.
    (5) The revisions required by paragraphs (l) and (n) of AD 2016-
18-16.
    (6) The revision required by paragraph (h) of AD 2017-17-09.
    (7) The revision required by paragraph (h) of AD 2018-04-12.

(k) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Los Angeles ACO Branch, 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 certification office, send it to the attention of 
the person identified in paragraph (l) of this AD. Information may 
be emailed to: 9-ANM-LAACO-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, modification, or alteration required by this AD 
if it is approved by The Boeing Company Organization Designation 
Authorization (ODA) that has been authorized by the Manager, Los 
Angeles ACO Branch, FAA, to make those findings. To be approved, the 
repair method, modification deviation, or alteration deviation must 
meet the certification basis of the airplane, and the approval must 
specifically refer to this AD.
    (4) AMOCs that were previously approved for the ADs specified in 
paragraph (j) of this AD are not approved as AMOCs for this AD.

(l) Related Information

    For more information about this AD, contact Serj Harutunian, 
Aerospace Engineer, Propulsion Section, FAA, Los Angeles ACO Branch, 
3960 Paramount Boulevard, Lakewood, CA 90712-4137; phone: 562-627-
5254; fax: 562-627-5210; email: serj.harutunian@faa.gov.

(m) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (3) The following service information was approved for IBR on 
January 21, 2020 (84 FR 68326, December 16, 2019).
    (i) Boeing 737-100/200/200C/300/400/500 Airworthiness 
Limitations (AWLs) and Certification Maintenance Requirements 
(CMRs), D6-38278-CMR, dated March 2019.
    (ii) [Reserved]
    (4) For service information identified in this AD, contact 
Boeing Commercial Airplanes, Attention: Contractual & Data Services 
(C&DS), 2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-
5600; phone: 562-797-1717; internet: https://www.myboeingfleet.com.
    (5) You may view this service information at the FAA, Transport 
Standards Branch, 2200 South 216th St., Des Moines, WA. For 
information on the availability of this material at the FAA, call 
206-231-3195.
    (6) You may view this service information that is incorporated 
by reference at the National Archives and Records

[[Page 2627]]

Administration (NARA). For information on the availability of this 
material at NARA, email fedreg.legal@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on January 9, 2020.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2020-00580 Filed 1-15-20; 8:45 am]
 BILLING CODE 4910-13-P


