DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0576; Project Identifier 2019-CE-008-AD; Amendment
39-21758; AD 2021-20-20]
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)
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 installation of the wing leading edge tank fuel
pickup assembly in a pre-stressed condition, which could cause cracks
in the wing spar web or the fuel pickup assembly pipe. This AD requires
inspecting the angle of the support bracket on the wing leading edge
tank fuel pickup assembly and taking any necessary corrective actions.
The FAA is issuing this AD to address the unsafe condition on these
DATES: This AD is effective November 22, 2021.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of November 22,
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: email@example.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. It
is also available at https://www.regulations.gov by searching for and
locating Docket No. FAA-2021-0576.
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0576; 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: firstname.lastname@example.org.
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 22, 2021 (86 FR 38615). 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/36, 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/36 is prompted by a review of the installation of the
wing leading edge fuel pickup assemblies. It was found that the fuel
pickup assemblies could have been installed in a pre-stressed
condition, which could result in cracks in the wing spar web, or
cracks in the fuel pickup pipe. The [CAA] AD is issued to introduce
the instructions in Pacific Aerospace Mandatory Service Bulletin
(MSB) PACSB/XL/109 issue 1, dated 16 January 2019.
The MCAI requires inspecting the installation of the fuel pickup
assembly and the wing spar web on both wings and, if any defects are
found, taking all 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-2021-0576.
Discussion of Final Airworthiness Directive
The FAA received no comments on the NPRM or on the determination of
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
Related Service Information Under 1 CFR Part 51
The FAA reviewed Pacific Aerospace Mandatory Service Bulletin
PACSB/XL/109, Issue 1, dated January 16, 2019. The service information
contains procedures for inspecting the wing leading edge tank fuel
pickup assembly to determine if the assembly is under stress and for
accomplishing additional inspections and corrective actions if
necessary. 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 it will take about 1 work-hour per
airplane to comply with the inspection required by this AD. The average
labor rate is $85 per work-hour.
Based on these figures, the FAA estimates the inspection cost of
this AD on U.S. operators to be $1,955 or $85 per airplane.
In addition, the FAA estimates that any necessary follow-on actions
will take 4 work-hours and require parts costing $500, for a cost of
$840 per airplane. The FAA has no way of determining the number of
airplanes that may need these actions.
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some of the costs of this AD
may be covered under warranty, thereby reducing the cost impact on
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.
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
(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
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