preamble attached >>>
ADs updated daily at www.Tdata.com
2023-16-06 HAMILTON SUNDSTRAND CORPORATION: Amendment 39-22525; Docket No. FAA-2023-1398; Project Identifier AD-2023-00472-P.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective October 20, 2023.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This  AD  applies  to  Hamilton Sundstrand Corporation (Hamilton Sund-
    strand) Model 14SF-17 and 14SF-19 propellers.

Note 1 to paragraph (c):  These  propellers  are known to be installed on,
but not limited to,  Viking Air Limited  (type certificate previously held
by Bombardier Inc.; Canadair Limited)  Model CL-215-6B11  (CL-215T and CL-
415 Variants) airplanes.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 6123, Propeller Feathering
    /Reversing.

(e) UNSAFE CONDITION

    This AD was prompted  by a report of an auxiliary motor and pump fail-
    ing to feather a  propeller in flight. The  FAA is issuing this  AD to
    prevent the failure of a  certain auxiliary motor and pump  to feather
    propellers. The unsafe  condition, if not  addressed, could result  in
    reduced controllability of the aircraft and consequent loss of control
    of the aircraft.

(f) COMPLIANCE

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

(g) REQUIRED ACTIONS

(1) Within 90 days after the effective date of this AD,  remove from serv-
    ice an auxiliary motor and pump  having  part  number  (P/N)  782655-3
    (Aerocontrolex P/N 4122-006009)  and  replace  with an auxiliary motor
    and pump having P/N 782655-4 (Aerocontrolex P/N 4122-056000) in accord
    -ance with the Accomplishment Instructions, paragraphs 3.B., 3.C., and
    3.E. of Hamilton Sundstrand Corporation Service Bulletin (SB) 14SF-61-
    168, Revision 1, dated December 21, 2016 (Hamilton Sundstrand SB 14SF-
    61-168, Revision 1).

(2) After replacement of the auxiliary motor and pump,  perform a post-in-
    stallation system test  in accordance with the Accomplishment Instruc-
    tions, paragraph 3.F. of Hamilton Sundstrand SB 14SF-61-168,  Revision
    1.

(h) INSTALLATION PROHIBITION

    After the effective date of this AD, do not install an auxiliary motor
    and pump having P/N 782655-3  (Aerocontrolex P/N 4122-006009)  on  any
    propeller.

(i) NO RETURN OF PARTS

    Where the service information referenced in the Accomplishment Instruc
    -tions, paragraph 3.B. of Hamilton Sundstrand SB 14SF-61-168, Revision
    1, specifies returning certain parts to the manufacturer for modifica-
    tion, this AD does not include that requirement.

(j) CREDIT FOR PREVIOUS ACTIONS

    You may take credit for the actions  required by paragraph (g) of this
    AD if you performed those actions before the effective date of this AD
    using Hamilton Sundstrand SB 14SF-61-168, Original Issue, dated Decem-
    ber 14, 2016.

(k) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The  Manager,  East Certification 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
    branch office, send  it to the  attention of the  person identified in
    paragraph (l)(1) of this AD. Information may be emailed to: 9-AVS-AIR-
    BACO-COS@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.

(l) RELATED INFORMATION

(1) For more information about this AD,  contact Isabel Saltzman, Aviation
    Safety Engineer,  FAA,  1701 Columbia Avenue,  College Park, GA 30337;
    phone: (781) 238-7649; email: 9-AVS-AIR-BACO-COS@faa.gov.

(2) Service information identified in this AD  that is not incorporated by
    reference is available at the addresses specified in paragraphs (m)(3)
    and (4) of this AD.

(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 the AD specifies otherwise.

(i) Hamilton Sundstrand Corporation Service Bulletin 14SF-61-168, Revision
    1, dated December 21, 2016.

Note 2 to paragraph (m)(2)(i):  Hamilton Sundstrand Corporation  is  a UTC
Aerospace Systems Company.  This service information is identified as both
Hamilton Sundstrand Corporation and UTC Aerospace Systems.

(ii) [Reserved]

(3) For service information identified in this AD,  contact Hamilton Sund-
    strand, One Hamilton Road, Windsor Locks, CT 06096;  phone: (877) 808-
    7575; email: CRC@collins.com.

(4) You may view this service information  at FAA,  Airworthiness Products
    Section, Operational Safety Branch,  1200 District Avenue, Burlington,
    MA 01803.  For information on the availability of this material at the
    FAA, call (817) 222-5110.

(5) You may view  this service information  that is incorporated by refer-
    ence at the National Archives and Records Administration  (NARA).  For
    information on the availability of this material  at NARA,  email: fr.
    inspection@nara.gov,  or go to: www.archives.gov/federal-register/cfr/
    ibr-locations.html.

Issued on August 24, 2023.  Victor Wicklund, Deputy Director, Compliance &
Airworthiness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Isabel Saltzman, Aviation Safety Engineer
FAA, 1701 Columbia Avenue, College Park, GA 30337;  phone: (781) 238-7649;
email: 9-AVS-AIR-BACO-COS@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2023-1398; Project Identifier AD-2023-00472-P;
Amendment 39-22525; AD 2023-16-06]
RIN 2120-AA64

Airworthiness Directives; Hamilton Sundstrand Corporation
Propellers

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all
Hamilton Sundstrand Corporation (Hamilton Sundstrand) Model 14SF-17 and
14SF-19 propellers. This AD was prompted by a report of an auxiliary
motor and pump failing to feather a propeller in flight. This AD
requires replacement of a certain auxiliary motor and pump. This AD
also prohibits installation of a certain auxiliary motor and pump on
any propeller. The FAA is issuing this AD to address the unsafe
condition on these products.

DATES: This AD is effective October 20, 2023.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of October 20,
2023.

ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2023-1398; 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 final rule, any comments received, and other
information. The address for Docket Operations is U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
For service information identified in this final rule,
contact Hamilton Sundstrand, One Hamilton Road, Windsor Locks, CT
06096; phone: (877) 808-7575; email: CRC@collins.com.
You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 1200
District Avenue, Burlington, MA 01803. For information on the
availability of this material at the FAA, call (817) 222-5110. It is
also available at regulations.gov under Docket No. FAA-2023-1398.

FOR FURTHER INFORMATION CONTACT: Isabel Saltzman, Aviation Safety
Engineer, FAA, 1701 Columbia Avenue, College Park, GA 30337; phone:
(781) 238-7649; email: 9-AVS-AIR-BACO-COS@faa.gov.

SUPPLEMENTARY INFORMATION:

Background

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all Hamilton Sundstrand
Model 14SF-17 and 14SF-19 propellers. The NPRM published in the Federal
Register on June 27, 2023 (88 FR 41513). The NPRM was prompted by a
report of an auxiliary motor and pump installed on a non-Hamilton
Sundstrand propeller failing to feather the propeller in flight through
either the primary or the backup means. The failure was caused by motor
magnets in the auxiliary motor and pump that were de-bonded due to
corrosion at the magnet and housing interface. The de-bonded motor
magnets prevented motor rotation. Hamilton Sundstrand Model 14SF-17 and
14SF-19 propellers use the same auxiliary motor and pump. These
propellers are installed on, but not limited to, Viking Air Limited
(type certificate previously held by Bombardier Inc.; Canadair Limited)
Model CL-215-6B11 (CL-215T & CL-415 Variants) airplanes. In the NPRM,
the FAA proposed to require the removal from service of an auxiliary
motor and pump having part number (P/N) 782655-3 (Aerocontrolex P/N
4122-006009) and replacement with an auxiliary motor and pump having P/
N 782655-4 (Aerocontrolex P/N 4122-056000). In the NPRM, the FAA also
proposed to prohibit installation of an auxiliary motor and pump having
P/N 782655-3 (Aerocontrolex P/N 4122-006009) on any propeller. The FAA
is issuing this AD to address the unsafe condition on these products.

Discussion of Final Airworthiness Directive

Comments

The FAA received no comments on the NPRM or on the determination of
the costs.

Conclusion

The FAA reviewed the relevant data and determined that air safety
requires adopting this AD as proposed. Accordingly, the FAA is issuing
this AD to address the unsafe condition on these products. Except for
minor editorial changes, this AD is adopted as proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

The FAA reviewed Hamilton Sundstrand Corporation Service Bulletin
(SB) 14SF-61-168, Revision 1, dated December 21, 2016. This service
information specifies instructions for replacing the auxiliary motor
and pump. Hamilton Sundstrand Corporation is a UTC Aerospace Systems
Company. This service information is identified as both Hamilton
Sundstrand Corporation and UTC Aerospace Systems. 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.

Costs of Compliance


The FAA estimates that this AD affects 20 propellers installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

Estimated Costs

Action
Labor cost
Parts cost
Cost per product
Cost on U.S. operators
Replace auxiliary motor and pump 2 work-hours x $85 per hour = $170
$11,000
$11,170
$223,400
Perform post-installation system test 1 work-hour x $85 per hour = $85
0
85
1,700

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

This AD will not have federalism implications under Executive Order
13132. This AD will 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 this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, and
(3) 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 Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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: