[Federal Register Volume 86, Number 193 (Friday, October 8, 2021)]
[Proposed Rules]
[Pages 56227-56229]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-21937]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0218; Project Identifier MCAI-2020-01519-A]
RIN 2120-AA64


Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Pilatus Aircraft Ltd. (Pilatus) Model PC-24 airplanes. This 
proposed AD results from 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 insufficient performance of the 
fuel drain system that could lead to fire and damage of the airplane. 
This proposed AD would require modifying the fuel drain pipe routing 
and installing a drain mast. The FAA is proposing this AD to address 
the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by November 
22, 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 NPRM, contact 
Pilatus Aircraft Ltd., CH-6371, Stans, Switzerland; phone: +41 848 24 7 
exception occurred on : 2021-21937.htm
exception occurred on : 2021-21937.htm
365; email: aircraft.com">[email protected]aircraft.com; website: https://
www.pilatus-aircraft.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-2021-0218; 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 MCAI, 
any comments received, and other information. The street address for 
Docket Operations is listed above.

FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aviation Safety 
Engineer, FAA, General Aviation & Rotorcraft Section, International 
Validation Branch, 901 Locust, Room 301, Kansas City, MO 64106; phone: 
(816) 329-4059; fax: (816) 329-4090; email: doug.rudolph@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 the ADDRESSES section. Include ``Docket No. FAA-2021-0218; 
Project Identifier MCAI-2020-01519-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 NPRM 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

[[Page 56228]]

under the FOIA, and they will not be placed in the public docket of 
this AD. Submissions containing CBI should be sent to Doug Rudolph, 
Aviation Safety Engineer, FAA, General Aviation & Rotorcraft Section, 
International Validation Branch, 901 Locust, Room 301, Kansas City, MO 
64106. 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 European Union Aviation Safety Agency (EASA), which is the 
Technical Agent for the Member States of the European Union, has issued 
EASA AD 2020-0252, dated November 12, 2020 (referred to after this as 
``the MCAI''), to address the unsafe condition on these products. The 
MCAI states:

    An occurrence was reported where an insufficient performance of 
the fuel drain system was detected on certain PC-24 aeroplanes.
    This condition, if not corrected, could lead, in case of a fuel 
leak, to contamination of the inboard rear fuselage, creating a fuel 
vapour which, in combination with an ignition source, could possibly 
result in a fire and consequent damage to the aeroplane.
    To address this potential unsafe condition, Pilatus Aircraft 
issued the [service bulletin] SB providing instructions to modify 
the fuel drain pipe routing and to install a drain mast.
    For the reason described above, this [EASA] AD requires 
modification of the fuel drain system.

    You may examine the MCAI at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0218.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Pilatus PC-24 Service Bulletin No. 28-003, 
Revision 1, dated January 23, 2020 (Pilatus SB 28-003R1). This service 
information specifies procedures for modifying the fuel drain pipe 
routing and installing a drain mast.
    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.

FAA's Determination

    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 us 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 described 
in the service information previously.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 36 airplanes of U.S. registry. The FAA also estimates that it 
would take about 12 work-hours per airplane to do the modification and 
installation of this proposed AD. The average labor rate is $85 per 
work-hour. Required parts would cost about $1,950 per product.
    Based on these figures, the FAA estimates the cost of the proposed 
AD on U.S. operators would be $106,920 or $2,970 per airplane.
    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some of the costs of this 
proposed AD may be covered under warranty, thereby reducing the cost 
impact on affected operators.

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) Would not be 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

0
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]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

Pilatus Aircraft Ltd.: Docket No. FAA-2021-0218; Project Identifier 
MCAI-2020-01519-A.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by November 22, 2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Pilatus Aircraft Ltd. Model PC-24 airplanes, 
serial numbers 101 through 184, certificated in any category.

(d) Subject

    Joint Aircraft System Component (JASC) Code 2830, Fuel Dump 
System.

(e) Reason

    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 insufficient 
performance of the fuel drain system that could lead to fire and 
damage of the airplane. The FAA is issuing this AD to prevent fuel 
contamination of the inboard rear fuselage. If not addressed, this 
unsafe condition, in combination with an ignition source, could 
result in fire and loss of control of the airplane.

[[Page 56229]]

(f) Compliance

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

(g) Required Actions

    Within 5 months after the effective date of this AD, modify the 
fuel drain pipe routing and install the drain mast by following 
paragraphs A. and B. of the Accomplishment Instructions in Pilatus 
PC-24 Service Bulletin No. 28-003, Revision 1, dated January 23, 
2020.

(h) Alternative Methods of Compliance (AMOCs)

    (1) 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 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 inspector, 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 Doug Rudolph, 
Aviation Safety Engineer, General Aviation & Rotorcraft Section, 
FAA, General Aviation & Rotorcraft Section, International Validation 
Branch, 901 Locust, Room 301, Kansas City, MO 64106; phone: (816) 
329-4059; fax: (816) 329-4090; email: doug.rudolph@faa.gov.
    (2) Refer to MCAI European Union Aviation Safety Agency AD 2020-
0252, dated November 12, 2020, for related information. You may 
examine the MCAI at https://www.regulations.gov by searching for and 
locating Docket No. FAA-2021-0218.
    (3) For service information related to this AD, contact Pilatus 
Aircraft Ltd., Customer Support General Aviation, CH-6371 Stans, 
exception occurred on : 2021-21937.htm
exception occurred on : 2021-21937.htm
Switzerland; phone: +41 848 24 7 365; email: aircraft.com">[email protected]aircraft.com; website: https://www.pilatus-aircraft.com. You may 
review 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 30, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-21937 Filed 10-7-21; 8:45 am]
BILLING CODE 4910-13-P


