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PROPOSED AD HONDA AIRCRAFT COMPANY LLC: Docket No. FAA-2021-0838; Project Identifier AD-2020-01590-A.
(a) COMMENTS DUE DATE

    The FAA must receive comments by November 15, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Honda Aircraft Company LLC Model HA-420  airplanes,
    serial  numbers  42000011 through  42000179,  42000182, and  42000187,
    certificated in  any category,  with a  windshield assembly  installed
    that has  a part  number and  serial number  listed in  table 5 of the
    Accomplishment Instructions  in Honda  Aircraft Company  Alert Service
    Bulletin No. SB-420-56-002,  Revision B, dated  April 19, 2021  (Honda
    SB-420-56-002, Revision B).

(d) SUBJECT

    Joint  Aircraft  System  Component  (JASC) Code  3040, Windshield/Door
    Rain/Ice Removal.

(e) UNSAFE CONDITION

    This AD  was prompted  by a  report of  in-flight smoke  and fire that
    initiated  from  the windshield  heat  power wire  braid.  The FAA  is
    issuing this AD  to prevent arcing  of the windshield  heat power wire
    braid,  which could  ignite the  wire  sheathing  and sealant  and the
    windshield acrylic. This  condition, if not  addressed, could lead  to
    cockpit smoke and fire.

(f) COMPLIANCE

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

(g) TEMPORARY REVISIONS  TO THE AIRPLANE  FLIGHT MANUALS (AFMS)  AND QUICK
    REFERENCE HANDBOOKS (QRHS)

(1) Within 15 days after the effective date  of this AD, revise the exist-
    ing AFM and QRH for your airplane by inserting the pages identified in
    the  applicable  temporary revisions  listed  in paragraphs  (g)(1)(i)
    through (iv) of this AD.

(i) Honda  Aircraft Company  Temporary Revision  TR 04A-1,  dated March 4,
    2020, for Airplane Flight Manual HJI-29001-003-001 Rev C.

(ii) HondaJet Temporary Revision TR 04A-1, dated March 4, 2020, for  Quick
     Reference Handbook HJ1-29000-007-001 Rev C.

(iii) Honda Aircraft  Company  Temporary Revision TR 04A-1, dated March 4,
      2020, for Airplane Flight Manual HJ1-29001-003-001 Rev E.

(iv) HondaJet Temporary Revision TR 04A-1, dated March 4, 2020, for  Quick
     Reference Handbook Normal Procedures Rev E, HJ1-29001-007-001.

(2) The actions required by paragraph  (g)(1) of this AD may be  performed
    by  the  owner/operator  (pilot)  holding  at  least  a  private pilot
    certificate  and must  be entered  into the  aircraft records  showing
    compliance with this AD in  accordance with 14 CFR 43.9(a)(1)  through
    (4), and  14 CFR  91.417(a)(2)(v). The  record must  be maintained  as
    required by 14 CFR 91.417, 121.380, or 135.439.

(h) WINDSHIELD ASSEMBLY REPLACEMENT

    Within  24  months after  the  effective date  of  this AD,  for  each
    windshield assembly  with a  part number  and serial  number listed in
    table 5  of the  Accomplishment Instructions  in Honda  SB-420-56-002,
    Revision B, replace  the windshield assembly  in accordance with  step
    (2) or (3) of the Accomplishment Instructions in Honda SB-420-56- 002,
    Revision B.

(i) REMOVAL OF REVISIONS TO THE AFMS AND QRHS

    Before  further  flight  after  replacing  the  windshield  assemblies
    required by paragraph  (h) of this  AD, remove the  AFM and QRH  pages
    that were required by paragraph (g) of this AD.

(j) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager, Atlanta  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 (k)(1) of this AD.

(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) For  service  information  that  contains steps  that  are labeled  as
    "Required for Compliance" (RC), the following provisions apply.

(i) The steps labeled as RC,  including substeps under an RC step  and any
    figures identified in an RC step, must be done to comply with the  AD.
    An AMOC is required for any deviations to RC steps, including substeps
    and identified figures.

(ii) Steps not labeled as RC  may be deviated from using accepted  methods
     in accordance with the  operator's maintenance or inspection  program
     without  obtaining  approval  of  an  AMOC,  provided  the  RC steps,
     including  substeps  and identified  figures,  can still  be  done as
     specified,  and  the  airplane  can  be  put  back  in  an  airworthy
     condition.

(k) RELATED INFORMATION

(1) For  more  information about  this AD,  contact  Bryan  Long, Aviation
    Safety  Engineer,  Atlanta  ACO  Branch,  FAA,  1701  Columbia Avenue,
    College Park, GA  30337; phone: (404)  474-5578; fax: (404)  474-5606;
    email: bryan.long@faa.gov.

(2) For service information identified in this AD, contact Honda  Aircraft
    Company LLC, 6430 Ballinger  Road, Greensboro, NC 27410;  phone: (336)
    662-0246;  website:  https://www.hondajet.com.   You  may  view   this
    referenced  service  information at  the  FAA, Airworthiness  Products
    Section, Operational Safety Branch, 901 Locust, Kansas City, MO 64106.
    For information on the availability of this material at the FAA,  call
    (816) 329-4148.

Issued  on  September 23,  2021.  Lance T.  Gant,  Director, Compliance  &
Airworthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments  on this proposed AD by November  15,
2021.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration


14 CFR Part 39

[Docket No. FAA-2021-0838; Project Identifier AD-2020-01590-A]
RIN 2120-AA64

Airworthiness Directives;
Honda Aircraft Company, LLC Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Honda Aircraft Company, LLC (Honda) Model HA-420 airplanes.
This proposed AD was prompted by a report of in-flight smoke and fire
that initiated from the windshield heat power wire braid. This proposed
AD would require incorporating temporary revisions into the airplane
flight manual (AFM) and the quick reference handbook (QRH) that modify
procedures for windshield heat operation until the affected windshield
assemblies are replaced. The FAA proposes this AD to address the unsafe
condition on these products.

DATES: The FAA must receive comments on this proposed AD by November 15, 2021.

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 https://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 rule, contact
Honda Aircraft Company, LLC, 6430 Ballinger Road, Greensboro, NC 27410;
phone: (336) 662-0246; website: https://www.hondajet.com. You may view
this service information at the FAA, Airworthiness Products Section,
Operational Safety Branch, 901 Locust, Kansas City, MO 64106. For
information on the availability of this material at the FAA, call (816)
329-4148.

Examining the AD Docket


You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0838; or in person at
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The AD docket contains this NPRM, any comments
received, and other information. The street address for Docket
Operations is listed above.

FOR FURTHER INFORMATION CONTACT:
Bryan Long, Aviation Safety Engineer,
Atlanta ACO Branch, FAA, 1701 Columbia Avenue, College Park, GA 30337;
phone: (404) 474-5578; fax: (404) 474-5606; email: bryan.long@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited


The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments to an address listed
under ADDRESSES. Include "Docket No. FAA-2021-0838; Project Identifier
AD-2020-01590-A" at the beginning of your comments. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
this proposal because of those comments.

Except for Confidential Business Information (CBI) as described in
the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
https://www.regulations.gov, including any personal information you
provide. The agency will also post a report summarizing each
substantive verbal contact received about this NPRM.

Confidential Business Information


CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public disclosure. If your
comments responsive to this NPRM contain commercial or financial
information that is customarily treated as private, that you actually
treat as private, and that is relevant or responsive to this NPRM, it
is important that you clearly designate the submitted comments as CBI.
Please mark each page of your submission containing CBI as "PROPIN."
The FAA will treat such marked submissions as confidential under the
FOIA, and they will not be placed in the public docket of this NPRM.
Submissions containing CBI should be sent to Bryan Long, Aviation
Safety Engineer, Atlanta ACO Branch, FAA, 1701 Columbia Avenue, College
Park, GA 30337. Any commentary that the FAA receives that is not
specifically designated as CBI will be placed in the public docket for
this rulemaking.

Background


The FAA received a report of inflight smoke and fire that initiated
from the windshield heat power wire braid on a Honda Model HA-420
airplane. An investigation identified that certain Honda Model HA-420
airplanes could have a severed windshield heat power wire braid from
installation of the windshield heat wiring during manufacture. The
severed windshield heat power wire braid could cause arcing that
ignites the wire sheathing and sealant and the windshield acrylic. This
condition, if not addressed, could lead to cockpit smoke and fire.

FAA's Determination


The FAA is issuing this NPRM after determining that the unsafe
condition described previously is likely to exist or develop on other
products of the same type design.

Related Service Information Under 1 CFR Part 51


The FAA reviewed the following temporary revisions.

Honda Aircraft Company Temporary Revision TR 04A-1, dated
March 4, 2020, for Airplane Flight Manual HJI-29001-003-001 Rev C.

HondaJet Temporary Revision TR 04A-1, dated March 4, 2020,
for Quick Reference Handbook HJ1-29000-007-001 Rev C.

Honda Aircraft Company Temporary Revision TR 04A-1, dated
March 4, 2020, for Airplane Flight Manual HJ1-29001-003-001 Rev E.

HondaJet Temporary Revision TR 04A-1, dated March 4, 2020,
for Quick Reference Handbook Normal Procedures Rev E, HJ1-29001-007-001.

These temporary revisions provide modified procedures for
windshield heat operation to reduce exposure to potential windshield
heat for the applicable serial numbers specified on the documents.

The FAA also reviewed Honda Service Bulletin SB-420-56-002,
Revision B, dated April 19, 2021 (Honda SB-420-002B). The service
bulletin specifies identifying and replacing affected windshield
assemblies. The service bulletin also specifies removing the temporary
revisions to the AFM, QRH, and electronic checklist (ECL) after the
affected windshield assemblies have been replaced.

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.

Proposed AD Requirements in This NPRM


This proposed AD would require incorporating the temporary
revisions to the AFM and QRH that modify procedures for windshield heat
operations until the affected windshield assemblies are replaced. This
proposal would allow the owner/operator (pilot) to revise the AFM and
QRH. These revisions are not considered maintenance actions and may be
done by a pilot holding at least a private pilot certificate. These
actions must be recorded in the aircraft maintenance records to show
compliance with this AD.

Differences Between This AD and the Service Information


Honda issued temporary revisions to the AFM, QRH, and ECL prior to
issuing Honda SB-420-002B, which specifies replacement of the
windshield assemblies. Honda SB-420-002B does not specify incorporating
the temporary revisions to the AFM, QRH, and ECL but addresses removal
if the temporary revisions were incorporated. The proposed AD would not
require incorporating or removing the temporary revisions to the ECL
because the ECL is not part of the approved type design of the
airplane. All pertinent requirements would be addressed through the
AFM.

Costs of Compliance


The FAA estimates that this AD, if adopted as proposed, would
affect 156 airplanes of U.S. registry. There are 475 affected
windshield assemblies worldwide, and the FAA has no way of knowing the
number of affected windshield assemblies installed on U.S. airplanes.
The estimated cost on U.S. operators reflects the maximum possible cost
based on the 156 airplanes of U.S. registry.

The FAA estimates the following costs to comply with this proposed AD:

Estimated Costs

ACTION
LABOR COST
PARTS COST
COST PER PRODUCT
COST ON U.S.OPERATORS
Insert revised procedures in the AFM and QRH. 1 work-hour x $85 per hour = $85. Not applicable
$85
$13,260
* Windshield assembly replacement(both left and right assemblies). 154 work-hours x $85 per hour = $13,090. $153,286
166,376
25,954,656
Remove revised procedures from the AFM and QRH. 1 work-hour x $85 per hour = $85. Not applicable
85
13,260

* On most airplanes, both the left and right windshield assemblies have a serial number affected by the unsafe
condition, and the above costs represents replacement of both the left and right windshield assemblies.
However, some airplanes may only have one affected windshield assembly and not require replacement of both.

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.

The FAA is proposing 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


The FAA 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) Would not affect intrastate aviation in Alaska, and

(3) Would 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 adding the following new airworthiness
directive: