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PROPOSED AD BRITTEN-NORMAN AIRCRAFT, LTD.: Docket No. FAA-2024-0044; Project Identifier MCAI-2023-00629-A.
(a) COMMENTS DUE DATE

    The FAA must receive comments on this airworthiness directive  (AD) by
    March 18, 2024.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies to Britten-Norman Aircraft Ltd airplanes,  all  serial
    numbers, certificated in any category, identified in paragraphs (c)(1)
    and (2) of this AD.

(1) Model BN-2, BN-2A, BN-2A-2, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2A-
    20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B-
    27, BN-2T, BN2T-4R, and BN2T-4S airplanes.

(2) Model BN2A MK. III, BN2A MK. III-2, and BN2A MK. III-3 airplanes.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 2797,  Flight Control Sys-
    tem Wiring.

(e) UNSAFE CONDITION

    This AD was prompted by reports of electrical cable  (Koiled Kord) and
    flight control cables interference with the control column. The FAA is
    issuing  this  AD to  address  interference between  the  Koiled Kord,
    flight control cables,  and the control  column, which could  restrict
    the  full  and  free  movement of  the  flight  controls.  This unsafe
    condition, if not  addressed, could result  in loss of  control of the
    airplane during flight.

(f) COMPLIANCE

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

(g) DEFINITION

    For  the purposes  of this AD,  a Koiled Kord is the coiled electrical
    cable that carries  the wires  from  switches  on  the  control  yoke,
    through the control column tube,  to the rear of the instrument panel.
    It exits the control column tube  behind the instrument panel and con-
    tinues to a terminal block.

(h) REQUIRED ACTIONS

(1) Within 100 hours time-in-service  (TIS)  after  the  effective date of
    this AD,  inspect for interference  between the control column, rudder
    pedal adjuster cable, and any other wiring, including the Koiled Kord,
    in accordance with Sections 6 and 7(1) of Britten-Norman Service Bull-
    etin SB 398, Issue 2, dated May 30, 2022 (Britten-Norman SB 398, Issue
    2), while concurrently performing a control column full and free move-
    ment inspection, in accordance with Section 8 of Britten-Norman SB 398
    Issue 2,  to inspect for free play,  friction,  binding,  non - linear
    forces, and any remaining interference.

(2) If interference between the control column,  the rudder pedal adjuster
    cable, and any other wiring,  including the Koiled Kord,  or  any free
    play, friction, binding, non-linear forces, or any remaining interfer-
    ence was found during the inspections  required by paragraph (h)(1) of
    this AD, before further flight,  securely tie any interfering electri-
    cal cables clear of the control column  for  its  full range of motion
    and perform a final full  and  free movement inspection  in accordance
    with Section 8 of Britten-Norman SB 398, Issue 2,  to inspect for free
    play, friction, binding,  non-linear forces,  and any remaining inter-
    ference.  If  there is any free play,  friction,  binding,  non-linear
    forces,  or any remaining interference,  before further flight resolve
    these issues in accordance with a method  approved by the Manager, In-
    ternational Validation Branch,  FAA;  or  the Civil Aviation Authority
    United Kingdom  (CAA UK);  or  Britten - Norman Aircraft Ltd.'s CAA UK
    Design Organization Approval  (DOA).  If  approved  by  the  DOA,  the
    approval must include the DOA-authorized signature.

(i) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

    The Manager, International Validation 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 In-
    ternational Validation Branch,  mail  it  to the address identified in
    paragraph (j)(2) of this AD  or  email to: 9-AVS-AIR-730-AMOC@faa.gov.
    If mailing information, also submit information by email. Before using
    any approved AMOC,  notify  your  appropriate principal inspector,  or
    lacking a principal inspector,  the manager of the local Flight Stand-
    ards District Office/certificate holding district office.

(j) ADDITIONAL INFORMATION

(1) Refer to CAA UK AD G-2022-0017, dated September 20, 2022,  for related
    information.  This  CAA UK AD  may  be  found  in  the  AD  docket  at
    regulations.gov under Docket No. FAA-2024-0044.

(2) For more information about this AD,  contact Penelope Trease, Aviation
    Safety Engineer,  FAA,  1600 Stewart Avenue,  Suite 410,  Westbury, NY
    11590; phone: (303) 342-1094; email: penelope.trease@faa.gov.

(k) MATERIAL INCORPORATED BY REFERENCE

(1) The Director of the Federal Register  approved  the  incorporation  by
    reference 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 the AD specifies otherwise.

(i) Britten-Norman Service Bulletin SB 398, Issue 2, dated May 30, 2022.

(ii) [Reserved]

(3) For service information identified in this AD,  contact Britten-Norman
    Aircraft Ltd., Bembridge Airport, Bembridge,  Isle of Wight,  PO35 5PR
    United Kingdom; phone +44 20 3371 4000; email customer.support@britten
    -norman.com;  website:  britten-norman.com/approvals-technical-publica
    tions.

(4) You may view this service information at the FAA,  Airworthiness Prod-
    ucts Section, Operational Safety Branch,  901 Locust,  Kansas City, MO
    64106. For information on the availability of this material at the FAA
    call (817) 222-5110.

(5) You may view this material at the National Archives and Records Admin-
    istration (NARA). For information on the availability of this material
    at NARA,  visit www.archives.gov/federal-register/cfr/ibr-locations or
    email fr.inspection@nara.gov.

Issued on January 26, 2024.  Michael Linegang, Acting Director, Compliance
& Airworthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments on this NPRM by March 18, 2024.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-0044; Project Identifier MCAI-2023-00629-A]
RIN 2120-AA64

Airworthiness Directives; Britten-Norman Aircraft, Ltd. 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 all Britten-Norman Aircraft, Ltd. Model BN-2, BN-2A, BN-2A-2, BN-
2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-
27, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B27, BN-2T, BN2T-4R, and BN2T-4S
airplanes; and Model BN2A MK. III, BN2A MK. III-2, and BN2A MK. III-3
airplanes. This proposed AD was prompted by reports of electrical cable
(Koiled Kord) and flight control cables interference with the control
column. This proposed AD would require inspecting for interference
between the control column, rudder pedal adjuster cable, and any wiring
(including the Koiled Kord) concurrently with performing a flight
control full and free movement inspection, and taking corrective
actions if necessary. The FAA is proposing this AD to address the
unsafe condition on these products.

DATES: The FAA must receive comments on this NPRM by March 18, 2024.

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 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.
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2024-0044; 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, the mandatory
continuing airworthiness information (MCAI), any comments received, and
other information. The street address for Docket Operations is listed
above.
Material Incorporated by Reference:
For service information identified in this NPRM, contact
Britten-Norman Aircraft Ltd., Bembridge Airport, Bembridge, Isle of
Wight, PO35 5PR United Kingdom; phone: +44 20 3371 4000; email:
customer.support@britten-norman.com; website: britten-norman.com/approvals-
technical-publications.
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 (817) 222-5110.

FOR FURTHER INFORMATION CONTACT: Penelope Trease, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
phone: (303) 342-1094; email: penelope.trease@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-2024-0044; Project Identifier
MCAI-2023-00629-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
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
Penelope Trease, Aviation Safety Engineer, FAA, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590. Any commentary that the FAA receives
which is not specifically designated as CBI will be placed in the
public docket for this rulemaking.

Background

The Civil Aviation Authority (CAA), which is the airworthiness
authority for the United Kingdom (UK), has issued CAA UK AD G-2022-
0017, dated September 20, 2022 (also referred to as the MCAI), to
correct an unsafe condition on all Britten-Norman Aircraft Ltd. Model
BN2 series Islander airplanes; and Model BN2A Mark III Trislander
airplanes. The MCAI states that there have been occurrences of flight
control restriction in pitch during the pilot's full and free flight
control checks prior to take-off. Investigations into these occurrences
revealed interference between the routing of the Koiled Kord, flight
control cables, and control column, which could restrict the full and
free movement of the flight controls. An incorrectly routed Koiled Kord
could snag the rudder pedal adjustment cable, draw it towards the
control column tube where it could snag the aileron control stop, and
restrict movement of the control column tube. This increased load on
the rudder pedal adjustment cable could unlock the adjustment
mechanism, permitting the rudder pedals to freely move forward and aft.
One of the investigations also revealed that a correctly routed Koiled
Kord was entangled with an incorrectly routed rudder pedal adjustment
cable, which resulted in snagging the aileron control stop. In order to
address this condition, the MCAI requires an inspection using Britten-
Norman Service Bulletin SB 398, Issue 2, dated May 30, 2022 (Britten-
Norman SB 398, Issue 2), to ensure the Koiled Kord is correctly routed
behind the instrument panel and that the rudder pedal adjustment cable
and Koiled Kord are not interfering with each other.
The FAA is proposing this AD to address this unsafe condition.
Interference between the Koiled Kord, flight control cables, and the
control column, if not addressed, could result in loss of control of
the airplane during flight.
You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2024-0044.

Related Service Information Under 1 CFR Part 51

The FAA reviewed Britten-Norman SB 398, Issue 2, which specifies
procedures for inspecting the cable routing behind the instrument panel
to determine if the cables and wiring to the instrument panel, wiring
in the surrounding area, the rudder pedal adjuster cable, and the
Koiled Kord are routed securely and there is clearance to allow full
and free movement of the flight controls, and if interference is found,
securely tying the cables so they are clear of the control column for
its full range of motion. 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
ADDRESSES.

FAA's Determination

These products have been approved by the aviation authority of
another country and are approved for operation in the United States.
Pursuant to the FAA's bilateral agreement with this State of Design
Authority, it has notified the FAA of the unsafe condition described in
the MCAI and service information referenced above. 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.

Proposed AD Requirements in This NPRM

This proposed AD would require accomplishing the actions specified
in the MCAI except as discussed under ``Differences Between this
Proposed AD and the MCAI.''

Differences Between This Proposed AD the MCAI


The MCAI specifies that if any interference is found during the
inspection for interference between the control column, rudder pedal
adjuster cable, and any wiring (including the Koiled Kord) while
performing a flight control full and free movement check, complete the
operator feedback form in Appendix A of Britten-Norman SB 398, Issue 2,
and return it to Britten-Norman Aircraft, Ltd. That action would not be
required by this proposed AD.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 72 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
Inspect for interference and full and free movement 1 work-hour x $85 per hour = $85
$0
$85
$6,120

The FAA estimates the following costs to do any necessary actions
that would be required based on the results of the proposed inspection.
The agency has no way of determining the number of airplanes that might
need these actions:

On-Condition Costs

Action
Labor cost
Parts cost
Cost per product
Correct Koiled Kord cable routing Up to 3 work-hours x $85 per hour = $255
$0
Up to $255

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 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

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: