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2021-21-10 PACIFIC AEROSPACE LIMITED:
Amendment 39-21770; Docket No. FAA-2021-0603; Project Identifier 2019-CE-006-AD.

(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective December 10, 2021.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD  applies  to  Pacific Aerospace Limited Model 750XL airplanes,
    serial numbers 100 through 205, 207 through 213 and 8001, certificated
    in any category.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 2800, Aircraft Fuel System

(e) UNSAFE CONDITION

    This AD was prompted by mandatory continuing airworthiness information
    (MCAI)  originated  by an  aviation  authority of  another  country to
    identify and correct an unsafe  condition on an aviation product.  The
    MCAI describes the unsafe condition as chafing damage in the port wing
    skin caused by the fuel system finger filters. The FAA is issuing this
    AD to detect and  correct chafing in the  left hand (LH) wing  leading
    edge tank skin, which if not detected and corrected, could result in a
    port wing fuel leak and lead to engine failure or fire.

(f) COMPLIANCE

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

(g) REQUIRED ACTIONS

    Within 165 hours time-in-service  after the effective date of this AD,
    modify the LH inspection panel assembly  and  inspect  the LH wing and
    fuel tank for chafing,  and then,  before further flight,  repair  any
    chafing and install the panels  in accordance  with the Accomplishment
    Instructions in  Pacific Aerospace Limited  Mandatory Service Bulletin
    PACSB/XL/099, Issue 1, dated January 16, 2019.

(h) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)

(1) The Manager,  International  Validation  Branch,  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 (i)(1) of this AD or email: 9-AVS-AIR-730-AMOC
    @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.

(i) RELATED INFORMATION

(1) For more  information  about this AD,  contact  Mike Kiesov,  Aviation
    Safety Engineer,  General Aviation & Rotorcraft Section, International
    Validation Branch, FAA, 901 Locust,  Room 301,  Kansas City, MO 64106;
    phone: (816) 329-4144; fax: (816) 329-4090; email: mike.kiesov@faa.gov

(2) Refer  to  Civil Aviation Authority  (CAA) of New Zealand  AD No. DCA/
    750XL/34, effective date February 7, 2019,  for more information.  You
    may examine the CAA AD in the AD docket at https://www.regulations.gov
    by searching for and locating Docket No. FAA-2021-0603.

(j) 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) Pacific Aerospace Limited  Mandatory  Service  Bulletin  PACSB/XL/099,
    Issue 1, dated January 16, 2019.

(ii) [Reserved]

(3) For service information identified in this AD, contact the Civil Avia-
    tion Authority of New Zealand Level 15, Asteron Centre, 55 Featherston
    Street, Wellington 6011;  phone: +64 4 560 9400;  fax: +64 4 569 2024;
    email: info@caa.govt.nz.

(4) You may view this service information at 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.

(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:  https://www.archives.gov/federal-
    register/cfr/ibr-locations.html.

Issued on October 8, 2021. Lance T Gant, Director, Compliance & Airworthi-
ness Division, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT:  Mike Kiesov, Aviation  Safety  Engineer,
General Aviation & Rotorcraft Section,  International  Validation  Branch,
FAA, 901 Locust, Room 301,  Kansas City, MO 64106;  phone: (816) 329-4144;
fax: (816) 329-4090; email: mike.kiesov@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0603; Project Identifier 2019-CE-006-AD; Amendment
39-21770; AD 2021-21-10]
RIN 2120-AA64

Airworthiness Directives; Pacific Aerospace Limited Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Pacific Aerospace Limited Model 750XL airplanes. This AD was
prompted by mandatory continuing airworthiness information (MCAI)
originated by an aviation authority of another country to identify and
correct an unsafe condition on an aviation product. The MCAI identifies
the unsafe condition as chafing damage in the port wing skin caused by
the fuel system finger filters. This AD requires inspecting the wing
internal skin for chafing and taking any necessary corrective actions.
The FAA is issuing this AD to address the unsafe condition on these
products.

DATES: This AD is effective December 10, 2021.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of December 10,
2021.

ADDRESSES: For service information identified in this final rule,
contact the Civil Aviation Authority of New Zealand, Level 15, Asteron
Centre, 55 Featherston Street, Wellington 6011; phone: +64 4 560 9400;
fax: +64 4 569 2024; email: info@caa.govt.nz. 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. It
is also available at https://www.regulations.gov by searching for and
locating Docket No. FAA-2021-0603.

Examining the AD Docket

You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0603; 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, the
MCAI, 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.

FOR FURTHER INFORMATION CONTACT: Mike Kiesov, Aviation Safety Engineer,
General Aviation & Rotorcraft Section, International Validation Branch,
FAA, 901 Locust, Room 301, Kansas City, MO 64106; phone: (816) 329-
4144; fax: (816) 329-4090; email: mike.kiesov@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 certain serial-numbered
Pacific Aerospace Limited Model 750XL airplanes. The NPRM published in
the Federal Register on July 28, 2021 (86 FR 40384). The NPRM was
prompted by MCAI originated by the Civil Aviation Authority (CAA),
which is the aviation authority for New Zealand. The CAA of New Zealand
has issued AD No. DCA/750XL/34, effective date February 7, 2019
(referred to after this as ``the MCAI''), to correct an unsafe
condition for certain Pacific Aerospace Limited Model 750XL airplanes.
The MCAI states:

DCA/750XL/34 is prompted by a report of finding chafing damage
in the port wing skin caused by the fuel finger filters. The [CAA]
AD is issued to introduce inspection and repair requirements with
the issue of Pacific Aerospace Mandatory Service Bulletin (MSB)
PACSB/XL/099 issue 1, dated 16 January 2019.

The MCAI requires inspecting the wing internal skin for chafing and
taking any necessary corrective actions.
You may examine the MCAI in the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0603.

Discussion of Final Airworthiness Directive

Comments

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

Conclusion

This product has been approved by the aviation authority of another
country and is 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 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. This AD is adopted as proposed in the
NPRM.

Related Service Information Under 1 CFR Part 51

The FAA reviewed Pacific Aerospace Limited Mandatory Service
Bulletin PACSB/XL/099, Issue 1, dated January 16, 2019. The service
information contains procedures for removing and modifying the
inspection panel assembly, inspecting the wing internal skin for
chafing, repairing any chafing damage and replacing the fuel filter as
necessary, and reinstalling the inspection panel assembly. 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.

Costs of Compliance

The FAA estimates that this AD affects 23 airplanes of U.S.
registry. The FAA also estimates that it would take about 5 work-hours
per airplane to do the inspection and modification requirements of this
proposed AD, and no parts would be necessary. Based on these figures,
the FAA estimates the cost of the inspection and modification for U.S.
operators to be $9,725, or $425 per airplane.
In addition, the FAA estimates that that any necessary follow-on
actions for repair or replacement requirements of this AD will take
about 6 work-hours and require parts costing $150, for a cost of $660
per airplane. The FAA has no way of determining the number of airplanes
that may need these actions.

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: