Proposed Rule2025-17033
Airworthiness Directives; Piaggio Aviation S.p.A. Airplanes
Primary source
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Published
September 5, 2025
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA proposes to adopt a new airworthiness directive (AD) for certain Piaggio Aviation S.p.A. (Piaggio) Model P-180 airplanes. This proposed AD was prompted by a report of leakage from the flexible hydraulic hoses connected to the hydraulic pump package (HPP). This proposed AD would require replacing the affected flexible hydraulic hoses. This proposed AD would also prohibit installing the affected flexible hydraulic hoses on any airplane. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 90 Issue 170 (Friday, September 5, 2025)</title>
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[Federal Register Volume 90, Number 170 (Friday, September 5, 2025)]
[Proposed Rules]
[Pages 42862-42864]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-17033]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2025-2272; Project Identifier MCAI-2025-00818-A]
RIN 2120-AA64
Airworthiness Directives; Piaggio Aviation S.p.A. 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 Piaggio Aviation S.p.A. (Piaggio) Model P-180 airplanes.
This proposed AD was prompted by a report of leakage from the flexible
hydraulic hoses connected to the hydraulic pump package (HPP). This
proposed AD would require replacing the affected flexible hydraulic
hoses. This proposed AD would also prohibit installing the affected
flexible hydraulic hoses on any airplane. The FAA is proposing this AD
to address the unsafe condition on these products.
DATES: The FAA must receive comments on this NPRM by October 20, 2025.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> 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.
<bullet> 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 <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-2272; or in person at Docket Operations between 9
a.m. and 5 p.m., Monday through Friday, except
[[Page 42863]]
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:
<bullet> For Piaggio Aerospace material identified in this proposed
AD, contact Piaggio, P180 Customer Support, via Pionieri e Aviatori
d'Italia, snc--16154 Genoa, Italy; phone: +39 331 679 74 93; email:
<a href="/cdn-cgi/l/email-protection#deaabbbdb6b0b7bdbfb2adabaeaeb1acaa9eaeb7bfb9b9b7b1bfbbacb1adaebfbdbbf0b7aa"><span class="__cf_email__" data-cfemail="deaabbbdb6b0b7bdbfb2adabaeaeb1acaa9eaeb7bfb9b9b7b1bfbbacb1adaebfbdbbf0b7aa">[email protected]</span></a>.
<bullet> You may view this material 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: Adam Hein, Aviation Safety Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (316)
946-4116; email: <a href="/cdn-cgi/l/email-protection#771613161a591f121e193711161659101801"><span class="__cf_email__" data-cfemail="75141114185b1d101c1b351314145b121a03">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written relevant data, views, or
arguments about this proposal. Send your comments using a method listed
under ADDRESSES. Include ``Docket No. FAA-2025-2272; Project Identifier
MCAI-2025-00818-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
<a href="http://regulations.gov">regulations.gov</a>, 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 Adam
Hein, 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 European Union Aviation Safety Agency (EASA), which is the
Technical Agent for the Member States of the European Union, has issued
EASA AD 2025-0102, dated May 5, 2025 (EASA AD 2025-0102) (also referred
to as the MCAI), to correct an unsafe condition on Piaggio Model P-180
Avanti and Avanti II airplanes, manufacturer serial numbers 1002, 1004
to 1234 inclusive, and 3001 to 3018 inclusive. The MCAI states that
leakage from the flexible hydraulic hoses was reported on a Model P-180
airplane. A subsequent investigation revealed that the failure of the
HPP electrical motor caused an anomalous current to return through the
HPP body, resulting in electrical arcing. This arcing, which occurred
as the HPP body was in contact with a flexible steel braided hose,
punctured the flexible hydraulic hose. Additionally, the improper
installation of the HPP, specifically the incorrect routing of the
hydraulic flexible lines according to the airplane maintenance manual,
contributed to the incident. This condition, if not detected and
corrected, could lead to leaks developing in the flexible hydraulic
hoses, which could result in loss of the hydraulic system or fire in
the HPP area.
To address the unsafe condition, the MCAI requires replacing the
affected flexible hydraulic hoses with a new serviceable part.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2025-2272.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Piaggio Aerospace Service Bulletin 80-0497,
Revision 0, dated March 5, 2025 (Piaggio SB 80-0497, Revision 0). This
material specifies procedures for replacing the affected flexible
hydraulic hoses with new flexible hydraulic hoses that have a non-
metallic and non-conductive abrasion sleeve covering the steel braid
which will provide electrical insulation that can prevent arcing and
electrostatic discharge in case of accidental contact between the
flexible hydraulic hoses and HPP body. This material is reasonably
available because the interested parties have access to it through
their normal course of business or by means identified in the ADDRESSES
section.
FAA's Determination
These products have been approved by the civil 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, that authority has notified the FAA of the unsafe condition
described in the MCAI and material 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 material already described. This proposed AD would also prohibit
installing the affected flexible hydraulic hoses on any airplane.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 107 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Replace flexible hydraulic hoses....... 22 work-hours x $85 per $1,241 $3,111 $332,877
hour = $1,870.
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[[Page 42864]]
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
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:
Piaggio Aviation S.p.A.: Docket No. FAA-2025-2272; Project
Identifier MCAI-2025-00818-A.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by October 20, 2025.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Piaggio Aviation S.p.A. Model P-180
airplanes, manufacturer serial numbers 1002, 1004 through 1234
inclusive, and 3001 through 3018 inclusive, certificated in any
category.
(d) Subject
Joint Aircraft System Component (JASC) Code 2910, Hydraulic
System, Main.
(e) Unsafe Condition
This AD was prompted by a report of leakage from the flexible
hydraulic hoses connected to the hydraulic pump package (HPP). The
FAA is issuing this AD to prevent contact between the flexible
hydraulic hoses and the HPP body, which could result in leaks
developing in the flexible hydraulic hoses. The unsafe condition, if
not addressed, could result in loss of the hydraulic system or fire
in the HPP area.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Action
For airplanes with flexible hydraulic hoses part number (P/N)
AS117-04-0205 or P/N 98E0520FAMA000W (landing gear (LG) up and LG
down lines); or flexible hydraulic hoses P/N MS8006G207AL or P/N
99G0530FDFD000W (return line) installed: Within 660 hours time-in-
service after the effective date of this AD, replace the affected
flexible hydraulic hoses in accordance with part 2. B. and 2. C. of
the Accomplishment Instructions of Piaggio Aerospace Service
Bulletin 80-0497, Revision 0, dated March 5, 2025.
(h) Installation Prohibition
For all airplanes, after the effective date of this AD, do not
install flexible hydraulic hoses with part number (P/N) AS117-04-
0205 or P/N 98E0520FAMA000W (LG up and LG down lines); or flexible
hydraulic hoses P/N MS8006G207AL or P/N 99G0530FDFD000W (return
line) on any airplane.
(i) Alternative Methods of Compliance
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 International Validation Branch, send
it to the attention of the person identified in paragraph (j) of
this AD and email to: <a href="/cdn-cgi/l/email-protection#d7969a989497b1b6b6f9b0b8a1"><span class="__cf_email__" data-cfemail="5b1a1614181b3d3a3a753c342d">[email protected]</span></a>. 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.
(j) Additional Information
For more information about this AD, contact Adam Hein, Aviation
Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; phone: (316) 946-4116; email: <a href="/cdn-cgi/l/email-protection#365752575b185e535f587650575718515940"><span class="__cf_email__" data-cfemail="98f9fcf9f5b6f0fdf1f6d8fef9f9b6fff7ee">[email protected]</span></a>.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the material listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions
required by this AD, unless the AD specifies otherwise.
(i) Piaggio Aerospace Service Bulletin 80-0497, Revision 0,
dated March 5, 2025.
(ii) [Reserved]
(3) For Piaggio Aerospace material identified in this AD,
contact Piaggio Aviation S.p.A., P180 Customer Support, via Pionieri
e Aviatori d'Italia, snc--16154 Genoa, Italy; phone: +39 331 679 74
93; email: <a href="/cdn-cgi/l/email-protection#651100060d0b0c060409161015150a171125150c0402020c0a0400170a16150406004b0c11"><span class="__cf_email__" data-cfemail="027667616a6c6b61636e717772726d707642726b6365656b6d6367706d71726361672c6b76">[email protected]</span></a>.
(4) You may view this material 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.
(5) You may view this material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit <a href="http://www.archives.gov/federal-register/cfr/ibr-locations">www.archives.gov/federal-register/cfr/ibr-locations</a> or email <a href="/cdn-cgi/l/email-protection#6f091d4106011c1f0a0c1b0600012f010e1d0e41080019"><span class="__cf_email__" data-cfemail="ea8c98c48384999a8f899e838584aa848b988bc48d859c">[email protected]</span></a>.
Issued on August 28, 2025.
Paul R. Bernado,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2025-17033 Filed 9-4-25; 8:45 am]
BILLING CODE 4910-13-P
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