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PROPOSED AD THE BOEING COMPANY: Docket No. FAA-2018-0162; Product Identifier 2017-NM-116-AD.
(a) COMMENTS DUE DATE

    The FAA must receive comments on this AD action by April 19, 2018.

(b) AFFECTED ADS

    This AD replaces AD 2016-18-01 Amendment 39-18631 (81 FR 59830, August
    31, 2016) ("AD 2016-18-01").

(c) APPLICABILITY

    This AD  applies to all The Boeing Company Model 737-600, -700, -700C,
    -800, -900, and -900ER series airplanes, certificated in any category,
    as specified in paragraphs (c)(1) through (c)(7) of this AD

(1) Airplanes in Groups 1 and 2, Configuration 1,  as identified in Boeing
    Special  Attention  Service Bulletin  737-32-1448,  Revision 2,  dated
    August 2, 2017 ("BSASB 737-32-1448, R2").

(2) Airplanes in Groups 1 and 2,  Configuration 2,  as identified in BSASB
    737-32-1448, R2.

(3) Airplanes in Group 3, as identified in BSASB 737-32-1448, R2.

(4) Airplanes in Groups 4 and 5, Configuration 1,  as  identified in BSASB
    737-32-1448,  R2,  except  where this  service bulletin  specifies the
    groups as line numbers 3527 through 6510 inclusive, this AD  specifies
    those  groups  as line  number  3527 through  any  line number  of  an
    airplane with an original Certificate of Airworthiness or an  original
    Export Certificate of Airworthiness  dated on or before  the effective
    date of this AD.

(5) Airplanes in Groups 4 and 5,  Configuration 2,  as identified in BSASB
    737-32-1448,  R2,  except  where this  service bulletin  specifies the
    groups as line numbers 3527 through 6510 inclusive, this AD  specifies
    those  groups  as line  number  3527 through  any  line number  of  an
    airplane with an original Certificate of Airworthiness or an  original
    Export Certificate of Airworthiness  dated on or before  the effective
    date of this AD.

(6) Airplanes in Groups 6  as identified in BSASB 737-32-1448, R2,  except
    where this service bulletin specifies the groups as line numbers  3527
    through 6510 inclusive, this AD specifies those groups as line  number
    3527  through  any  line  number  of  an  airplane  with  an  original
    Certificate  of Airworthiness  or  an  original Export  Certificate of
    Airworthiness dated on or before the effective date of this AD.

(7) All Model 737-600, -700, -700C, -800, -900 and -900ER series airplanes
    with  an  original  Certificate of Airworthiness or an original Export
    Certificate of Airworthiness dated after the effective date of this AD

(d) SUBJECT

    Air Transport Association (ATA) of America Code 32, Landing Gear.

(e) UNSAFE CONDITION

    This AD was prompted by reports  of heavy corrosion  and chrome damage
    on the forward and aft trunnion  pin assemblies of the right and  left
    main  landing gears  (MLGs).  We  are issuing  this AD  to detect  and
    correct  heavy corrosion  and chrome  damage  on  the forward  and aft
    trunnion pin assemblies of the right and left MLGs, which could result
    in cracking of these assemblies and collapse of the MLGs.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) INSPECTION TO DETERMINE PART NUMBER OF MLG TRUNNION PIN ASSEMBLY

    For airplanes identified in paragraphs (c)(1), (c)(3), (c)(4), and (c)
    (6) of this AD: Except as required by paragraph (l) of this AD, at the
    applicable time specified in Table 1, Table 2, Table 4, or Table 5, of
    paragraph  1.E.,  "Compliance,"  of  BSASB  737-32-1448,  R2,  do   an
    inspection to determine if any  of the MLG trunnion pin  assembly part
    numbers   identified  in   paragraph  2.C.3.,   "Parts  Modified   and
    Reidentified," of BSASB  737-32-1448, R2, are  installed. A review  of
    airplane maintenance records is acceptable in lieu of this  inspection
    if  the  part  number  of  each  MLG  trunnion  pin  assembly  can  be
    conclusively determined from that review.

(h) REPETITIVE LUBRICATION OF MLG TRUNNION PIN ASSEMBLIES

    For airplanes  identified in paragraphs (c)(1), (c)(3), (c)(4), or (c)
    (6) of this AD, having any part number identified in paragraph 2.C.3.,
    "Parts  Modified   and  Reidentified,"   of  BSASB   737-32-1448,  R2,
    installed: Except  as required  by paragraph  (l) of  this AD,  at the
    applicable time specified in Table 1, Table 2, Table 4, or Table 5, of
    paragraph 1.E., "Compliance," of BSASB 737-32-1448, R2, lubricate  the
    applicable forward and  aft trunnion pin  assemblies of the  right and
    left MLGs,  in accordance  with Work  Package 1  of the Accomplishment
    Instructions  of  BSASB   737-32-1448,  R2.  Repeat   the  lubrication
    thereafter at  intervals not  to exceed  those specified  in Table  1,
    Table 2,  Table 4,  or Table  5, of  paragraph 1.E.,  "Compliance," of
    BSASB  737-32-1448, R2.  Accomplishment  of  the actions  specified in
    paragraph  (j)  of  this  AD  terminates  the  repetitive  lubrication
    required by this paragraph.

(i) REPETITIVE INSPECTIONS, CORRECTIVE ACTIONS, AND LUBRICATION

    For  airplanes identified  in paragraphs  (c)(1), (c)(3),  (c)(4),  or
    (c)(6) of  this AD,  having any  part number  identified in  paragraph
    2.C.3.,  "Parts  Modified and  Reidentified,"  BSASB 737-32-1448,  R2,
    installed: Except  as required  by paragraph  (l) of  this AD,  at the
    applicable time specified in Table 1, Table 2, Table 4, or Table 5, of
    paragraph 1.E., "Compliance," of  BSASB 737-32-1448, R2, do  a general
    visual inspection of the  left and right MLGs  at the forward and  aft
    trunnion pin locations and the visible surfaces of the forward and aft
    trunnion pin assemblies for discrepancies including signs of corrosion
    or chrome plating damage, and  lubricate the forward and aft  trunnion
    pin assemblies as applicable, in accordance with Work Package 2 of the
    Accomplishment  Instructions  of  BSASB  737-32-1448, R2.  Repeat  the
    general visual inspection thereafter at intervals not to exceed  those
    specified in paragraph 1.E.,  "Compliance," of BSASB 737-32-1448,  R2.
    If any  discrepancy is  found during  any inspection  required by this
    paragraph,   before  further   flight,  do   all  applicable   related
    investigative and corrective actions in accordance with Work Package 2
    of  the   Accomplishment  Instructions   of  BSASB   737-32-1448,  R2.
    Accomplishment of  the actions  required by  paragraph (j)  of this AD
    terminates the repetitive inspections required by this paragraph.

(j) MODIFICATION OF MLG TRUNNION PIN ASSEMBLIES

    For  airplanes identified  in  paragraphs  (c)(1), (c)(3),  (c)(4), or
    (c)(6) of  this AD,  having any  part number  identified in  paragraph
    2.C.3.,  "Parts  Modified  and  Reidentified,"  BSASB  737-32-1448, R2
    installed: Except as required by paragraph (l) of this AD, at the time
    specified in Table 1, Table 2, Table 4, or Table 5, as applicable,  of
    paragraph 1.E.,  "Compliance," of  BSASB 737-32-1448,  R2, modify  the
    left and right MLG  trunnion pin assemblies, including  all applicable
    related investigative and corrective actions, in accordance with  Work
    Package 3 of the Accomplishment Instructions of BSASB 737-32-1448, R2.
    All applicable  related investigative  and corrective  actions must be
    done at the time specified  in paragraph 1.E., "Compliance," of  BSASB
    737-32-1448, R2. Accomplishment  of the actions  in Work Package  3 of
    the Accomplishment  Instructions of  BSASB 737-32-1448,  R2 terminates
    the repetitive lubrication  required by paragraph  (h) of this  AD and
    the repetitive inspections required by paragraph (i) of this AD.

(k) REPLACEMENT OF MLG FORWARD TRUNNION PIN HOUSING ASSEMBLY, SEAL AND RE-
    TAINER

    For airplanes identified in paragraphs  (c)(2) and (c)(5) of this  AD:
    Except as required by paragraph (l) of this AD, at the time  specified
    in Table 3 or Table 6, as applicable, of paragraph 1.E., "Compliance,"
    of BSASB 737-32-1448, R2, replace the seal, retainer, and support ring
    assembly  with  a new  seal  and retainer  configuration;  install the
    forward trunnion pin assembly into the housing assembly; and lubricate
    the forward  and aft  trunnion pin  assemblies for  the left and right
    MLGs;  in  accordance  with  Work  Package  4  of  the  Accomplishment
    Instructions of BSASB 737-32-1448, R2.

(l) EXCEPTION TO SERVICE INFORMATION SPECIFICATION

    Where paragraph 1.E., "Compliance," of BSASB 737-32-1448, R2 specifies
    a  compliance  time  "after  the  Revision  2  date  of  this  service
    bulletin," this AD requires compliance within the specified compliance
    time after the effective date of this AD.

(m) PARTS INSTALLATION LIMITATION

    As of the effective  date of this AD,  no person may install  a MLG or
    MLG trunnion  pin assembly  on any  airplane identified  in paragraphs
    (c)(1)  through  (c)(7) of  this  AD unless  the  actions required  by
    paragraphs  (j)  or  (k),  as   applicable,  of  this  AD  have   been
    accomplished on the MLG or MLG trunnion pin assembly.

(n) CREDIT FOR PREVIOUS ACTIONS

(1) This paragraph provides credit  for  the requirements of paragraph (h)
    of this AD, if those actions were performed before the effective  date
    of  this AD  using Boeing  Special Attention  Service Bulletin  737-32
    -1448,  dated  May  19,  2011;  or  Boeing  Special  Attention Service
    Bulletin 737-32-1448, Revision 1, dated May 29, 2015.

(2) This paragraph provides credit for the requirements of paragraphs (i),
    (j), and (k) of this AD,  if those actions were performed  before  the
    effective  date  of this  AD  using Boeing  Special  Attention Service
    Bulletin 737-32-1448, Revision 1, dated May 29, 2015.

(o) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager,  Seattle 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 (p)(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 in-
    spector, 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 Commercial Airplanes  Organization Designation
    Authorization (ODA) that has  been authorized by the  Manager, Seattle
    ACO Branch, 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 approved previously for AD 2016-18-01 are approved  as AMOCs for
    the corresponding provisions of this AD.

(p) RELATED INFORMATION

(1) For more information  about  this  AD,  contact  Alan Pohl,  Aerospace
    Engineer,  Airframe Section, FAA, Seattle ACO Branch, 2200 South 216th
    St, Des Moines, WA 98198; telephone and fax: 206-231-3527; email: alan
    .pohl@faa.gov.

(2) 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;  tele-
    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.

Issued in Renton, Washington, on February 20, 2018. Michael Kaszycki, Act-
ing Director, System Oversight Division, Aircraft Certification Service.

DATES: We must receive comments on this proposed AD by April 19, 2018.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0162; Product Identifier 2017-NM-116-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 Airworthiness Directive (AD) 2016-18-
01, which applies to certain The Boeing Company Model 737-600, -700,
-700C, -800, -900, and -900ER series airplanes. AD 2016-18-01 requires
repetitive lubrication of the forward and aft trunnion pin assemblies
of the right and left main landing gears (MLGs); repetitive inspection
of these assemblies for corrosion and chrome damage, and related
investigative and corrective actions, if necessary; and installation of
new or modified trunnion pin assembly components, which terminates the
repetitive lubrication and repetitive inspections. Since we issued AD
2016-18-01, we have determined that rotable parts were not addressed in
that AD and that all airplanes of the affected models, excluding those
with a certain configuration, should be inspected to determine if
affected MLG trunnion pin assemblies are installed. This proposed AD
would therefore add airplanes to the applicability. We are proposing
this AD to address the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by April 19, 2018.

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 NPRM, contact Boeing
Commercial Airplanes, Attention: Contractual & Data Services (C&DS),
2600 Westminster Blvd., MC 110-SK57, Seal Beach, CA 90740-5600;
telephone 562-797-1717; internet https://www.myboeingfleet.com. 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. It is also
available on the internet at http://www.regulations.gov by searching
for and locating Docket No. FAA-2018-0162.

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-2018-0162;
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 NPRM, 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 Section, FAA, Seattle ACO Branch, 2200 South 216th St., Des
Moines, WA 98198; telephone and fax: 206-231-3527; 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-2018-0162;
Product Identifier 2017-NM-116-AD" at the beginning of your comments.
We specifically invite comments on the overall regulatory, economic,
environmental, and energy aspects of this NPRM. We will consider all
comments received by the closing date and may amend this NPRM 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 issued AD 2016-18-01, Amendment 39-18631 (81 FR 59830, August
31, 2016) ("AD 2016-18-01"), for certain The Boeing Company Model
737-600, -700, -700C, -800, -900, and -900ER series airplanes. AD 2016-
18-01 requires repetitive lubrication of the forward and aft trunnion
pin assemblies of the right and left MLGs; repetitive inspection of
these assemblies for corrosion and chrome damage, and related
investigative and corrective actions, if necessary; and installation of
new or modified trunnion pin assembly components, which terminates the
repetitive lubrication and repetitive inspections. AD 2016-18-01
resulted from reports of heavy corrosion and chrome damage on the
forward and aft trunnion pin assemblies of the right and left MLGs. We
issued AD 2016-18-01 to detect and correct heavy corrosion and chrome
damage on the forward and aft trunnion pin assemblies of the right and
left MLGs, which could result in cracking of these assemblies and
collapse of the MLGs.

Actions Since AD 2016-18-01 Was Issued


To support operations, many operators have put processes in place
that, given certain conditions, allow them to rotate or transfer parts
or equipment within their fleets to different aircraft than what is
defined in the manufacturer's type design. We have determined that the
parts or equipment subject to the unsafe condition addressed by this
proposed AD may have been rotated or transferred in this manner, due to
similarity with parts or equipment not subject to the unsafe condition
addressed by this proposed AD. Therefore, AD 2016-18-01 is being
superseded to include all Model 737-600, -700, -700C, -800, -900, and
-900ER airplanes.

Related Service Information Under 1 CFR Part 51

We reviewed Boeing Special Attention Service Bulletin 737-32-1448,
Revision 2, dated August 2, 2017 ("BSASB 737-32-1448, R2"). This
service information describes procedures for determining the part
numbers of the forward and aft trunnion pin assemblies installed on the
right and left MLGs, inspections for corrosion or damage on the forward
and aft trunnion pin assemblies and related investigative and
corrective actions, repetitive lubrication of these assemblies, and
installation of new or modified trunnion pin assembly components. 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.

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 2016-18-01.
This proposed AD would add airplanes to the applicability. This
proposed AD would also prohibit the installation of a MLG or MLG
trunnion pin assembly on any airplane identified in paragraph (c) of
the proposed AD unless certain actions are accomplished. In addition,
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."
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-2018-0162.

The phrase "related investigative actions" is used in this
proposed AD. Related investigative actions are follow-on actions that
(1) are related to the primary action, and (2) further investigate the
nature of any condition found. Related investigative actions in an AD
could include, for example, inspections.

The phrase "corrective actions" is used in this proposed AD.
Corrective actions correct or address any condition found. Corrective
actions in an AD could include, for example, repairs.

Differences Between This Proposed AD and the Service Information


The effectivity specified in BSASB 737-32-1448, R2 consists of
Model 737-600, -700, -700C, -800, -900, and -900ER airplanes identified
as line numbers 1 through 6510 inclusive. Expanding the applicability
of this proposed AD to all Model 737-600, -700, -700C, -800, -900, and
-900ER airplanes addresses the rotability of the MLG trunnion pin
assembly.

In this proposed AD, operators would need to accomplish the actions
required by paragraphs (g), (h), (i), (j) and (k) of this proposed AD,
and comply with the parts installation prohibition in paragraph (m) of
this proposed AD, on any Model 737-600, -700, -700C, -800, -900, and -
900ER airplanes with an original Certificate of Airworthiness or an
original Export Certificate of Airworthiness dated on or before the
effective date of the final rule. We have confirmed with Boeing that
the accomplishment instructions in BSASB 737-32-1448, R2 are applicable
to these expanded groups of airplanes.

For Model 737-600, -700, -700C, -800, -900, and -900ER airplanes
with an original Certificate of Airworthiness or an original Export
Certificate of Airworthiness dated after the effective date of the
final rule, operators would not be required to comply with the
requirements of paragraphs (g), (h), (i), (j), and (k) of this proposed
AD, but would be required to comply with the parts installation
prohibition in paragraph (m) of this proposed AD.

Costs of Compliance

We estimate that this proposed AD affects up to 1,814 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
Lubrication (retained actions from AD 2016-18-01) 2 work-hours x $85 per hour = $170 per lubrication cycle 0 $170 per lubrication cycle $173,910, per lubrication cycle (1,023 airplanes)
Inspection (Groups 1 and 2, Configuration 1 airplanes; retained actions from AD 2016-18-01) 51 work-hours x $85 per hour = $4,335 per inspection cycle 0 $4,335 per inspection cycle $4,282,980 per inspection cycle (988 airplanes)
Inspection (Group 3 airplanes; retained actions from AD 2016-18-01) 93 work-hours x $85 per hour = $7,905 per inspection cycle 0 $7,905 per inspection cycle $276,675 per inspection cycle (35 airplanes)
Replacement/overhaul (Groups 1 and 2 airplanes; retained actions from AD 2016-18-01) 84 work-hours x $85 per hour = $7,140 0 $7,140 $7,054,320 (988 airplanes)
Replacement/overhaul (Group 3 airplanes retained actions from AD 2016-18-01) 86 work-hours x $85 per hour = $7,310 0 $7,310 $255,850 (35 airplanes)
Lubrication pin assemblies (new proposed action, Work Packages 1 and 2) 2 work-hours x $85 per hour = $170 per lubrication cycle 0 $170 per lubrication cycle $308,380, per lubrication cycle (up to 1,814 airplanes)
Inspection (new proposed action; Groups 3 and 6 airplanes; Work Package 2) 51 work-hours x $85 per hour = $4,335 per inspection cycle 0 $4,335 per inspection cycle $7,594,920 per inspection cycle (1,752 airplanes)
Inspection (new proposed action; Groups 1, 2, 4, and 5, Configuration 1 airplanes; Work Package 2) 93 work-hours x $85 per hour = $7,905 per inspection cycle 0 $7,905 per inspection cycle $490,110 per inspection cycle (62 airplanes)
Replacement/overhaul trunnion pin assembly (Groups 1, 2, 4, and 5 airplanes; new proposed action; Work Package 2) 84 work-hours x $85 per hour = $7,140 0 $7,140 $12,509,280 (up to 1,752 airplanes)
Replacement/overhaul trunnion pin assembly (Groups 3 and 6 airplanes; new proposed action; Work Package 2) 86 work-hours x $85 per hour = $7,310 0 $7,310 $453,220 (62 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.

This proposed AD is issued in accordance with authority delegated
by the Executive Director, Aircraft Certification Service, as
authorized by FAA Order 8000.51C. In accordance with that order,
issuance of ADs is normally a function of the Compliance and
Airworthiness Division, but during this transition period, the
Executive Director has delegated the authority to issue ADs applicable
to transport category airplanes to the Director of the System Oversight
Division.

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.

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.

Sec. 39.13 [Amended]

2. The FAA amends Sec. 39.13 by removing Airworthiness Directive (AD)
2016-18-01, Amendment 39-18631 (81 FR 59830, August 31, 2016), and
adding the following new AD: