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PROPOSED AD PIAGGIO AERO INDUSTRIES S.P.A.: Docket No. FAA-2022-0599; Project Identifier MCAI-2021-00456-A.
(a) COMMENTS DUE DATE

    The FAA must receive comments on this airworthiness directive (AD)  by
    August 1, 2022.

(b) AFFECTED ADS

    None.

(c) APPLICABILITY

    This AD applies  to Piaggio Aero  Industries S.p.A. (Piaggio)  Model P
    -180 airplanes, serial numbers  (S/N) 1174 through 1214  inclusive and
    S/N 1218 through 1230 inclusive, certificated in any category.

(d) SUBJECT

    Joint Aircraft System Component (JASC) Code 5330 Fuselage Main, Plate/
    Skin.

(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  identifies  the  unsafe condition  as  corrosion  in the  bottom
    fuselage area of the cabin compartment due to inner and outer sides of
    fuselage skin panels  treated with less  effective primer. The  FAA is
    issuing this AD to prevent degradation of the structural integrity  of
    the fuselage. This condition, if not addressed, could lead to loss  of
    control of the airplane.

(f) COMPLIANCE

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

(g) REQUIRED ACTIONS

(1) Within 12 months  after the effective date of this AD,  do the applic-
    able inspections and  corrective  actions  on  each fuselage wing skin
    panel in accordance with the Accomplishment Instructions, Part A, par-
    agraphs (1) through (15) and (17) through (20),  or  Part A (Alternate
    Procedure),  paragraphs  (31)  through (37),  (41) through (43),  (50)
    through (55), and (57) through (60),  in  Piaggio Service Bulletin 80-
    0405, Revision 0 dated March 15, 2021, as corrected by Piaggio Service
    Bulletin 80-0405,  Revision 0,  Errata Corrige No. 1,  dated March 24,
    2021 (Piaggio SB 80-0405), except for the following:

(i) You are not required to contact the manufacturer. Instead, for any re-
    pairs, use a method approved by the FAA or the European Union Aviation
    Safety Agency (EASA).

(ii) Where the steps in Part A  or  Part A (Alternate Procedure) reference
     Part B, you must follow the Accomplishment Instructions, Part B, par-
     agraphs (82) through (86), (88), and (104) of Piaggio SB 80-0405.

(2) If, as part of the corrective actions  required by paragraph (g)(1) of
    this AD,  you  repaired areas of the fuselage skin but did not replace
    the panels, do the following:

(i) Within 60 days  after completing the actions required by paragraph (g)
    (1) of this AD, report the inspection results,  including the informa-
    tion specified  in  the  Confirmation Slip  attached to Piaggio SB 80-
    0405, to Piaggio at technicalsupport@piaggioaerospace.it; and

(ii) Repeat the requirements of paragraph (g)(1) of this AD  at  intervals
     not to exceed 660 hours time-in-service (TIS) or 26 months, whichever
     occurs first.

(3) If, as part of the corrective actions  required by paragraph (g)(1) of
    this AD, you replaced the panels, within 60 days  after completing the
    actions required by paragraph (g)(1) of this AD, report the inspection
    results, including the information  specified in the Confirmation Slip
    attached to  Piaggio  SB  80-0405,  to  Piaggio  at  technicalsupport@
    piaggioaerospace.it.

(4) If, during all of the inspections required by paragraph (g)(1) of this
    AD, there is  no corrosion and  no primer inconsistencies,  no further
    action is required by this AD.

(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 and email to: 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,  FAA,  General Aviation & Rotorcraft Section,  Inter-
    national Validation Branch,  901 Locust,  Room  301,  Kansas City,  MO
    64106; phone: (816) 329-4144; email: mike.kiesov@faa.gov.

(2) Refer to EASA AD 2021-0104 dated April 15, 2021, for more information.
    You may view the EASA AD  at https://www.regulations.gov in Docket No.
    FAA-2022-0599.

(3) For service information  identified in this AD,  contact  Piaggio Aero
    Industries  S.p.A,  P180  Customer  Support,  via  Pionieri e Aviatori
    d'Italia, snc - 16154 Genoa, Italy;  phone: +39 331 679 74 93;  email:
    technicalsupport@piaggioaerospace.it. You may view this service infor-
    mation 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.

Issued on June 13, 2022.  Christina Underwood, Acting Director, Compliance
& Airworthiness Division, Aircraft Certification Service.

DATES: The FAA must receive comments on  this  proposed  AD  by  August 1,
2022.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0599; Project Identifier MCAI-2021-00456-A]
RIN 2120-AA64

Airworthiness Directives; Piaggio Aero Industries S.p.A. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Piaggio Aero Industries S.p.A. (Piaggio) Model P-180
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 identifies the unsafe condition as corrosion
in the bottom fuselage area of the cabin compartment due to inner and
outer sides of fuselage skin panels of certain airplanes treated with
the less effective primer. This proposed AD would require repetitively
inspecting the fuselage skin panels, visually inspecting the entire
fuselage inner side skin if necessary, and taking any necessary
corrective actions. 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 August 1,
2022.

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 Piaggio
Aero Industries S.p.A, P180 Customer Support, via Pionieri e Aviatori
d'Italia, snc--16154 Genoa, Italy; phone: +39 331 679 74 93; email:
technicalsupport@piaggioaerospace.it. 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 (817) 222-5110.

Examining the AD Docket

You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0599; 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: Mike Kiesov, Aviation Safety Engineer,
FAA, General Aviation & Rotorcraft Section, International Validation
Branch, 901 Locust, Room 301, Kansas City, MO 64106; phone: (816) 329-
4144; email: mike.kiesov@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-2022-0599;
Project Identifier MCAI-2021-00456-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 under the FOIA, and they will not be placed in the public
docket of this AD. Submissions containing CBI should be sent to Mike
Kiesov, 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 2021-0104, dated April 15, 2021 (referred to after this as
``the MCAI''), to address the unsafe condition on certain serial-
numbered Piaggio Model P.180 airplanes. The MCAI states:

Occurrences were reported where, during routine inspections,
diffused corrosion was detected on the fuselage inner side skin in
the area of the passenger cabin. Evidence indicates that the
presence of undetected (infiltrated or condensed) water, trapped in
between the inner surface of fuselage skin panels and the thermo-
acoustic insulation panels, could have started a galvanic corrosion
phenomenon, mainly in the bottom fuselage area of the cabin
compartment. Fuselage skin panels of certain aeroplanes, delivered
from 2009 to 2013, were treated with the first type of ``chromate-
free'' primer, chemically not as effective against corrosion when
compared to those containing chrome. The phenomenon has been
observed on aeroplanes subjected to prolonged inactivity and not
stored in a hangar, or those operating in an environment with high
humidity and/or frequent heavy precipitation, combined with a
possible deterioration of window sealing due to normal aging, wear
and tear.
This condition, if not corrected, could affect the structural
integrity of the fuselage.
To address this potential unsafe condition, Piaggio published
the [Piaggio Service Bulletin (SB) 80-0405, Revision 0, dated March
15, 2021] SB to provide inspection instructions.
For the reason described above, this [EASA] AD requires
repetitive inspections of each affected area and, if necessary, an
additional visual inspection of the entire fuselage inner side skin
and, depending on findings, accomplishment of applicable repair.
This [EASA] AD also requires reporting the inspection results to
Piaggio.

You may examine the MCAI in the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0599.

Related Service Information Under 1 CFR Part 51

The FAA reviewed Piaggio SB No. 80-0405, Revision 0, dated March
15, 2021. This service information specifies procedures for inspecting
the fuselage skin panels and inspecting the full inner fuselage skin.
It also specifies repairing or replacing any parts where corrosion is
found.
The FAA also reviewed Piaggio SB No. 80-0405, Revision 0, Errata
Corrige No. 1, dated March 24, 2021, which addresses discrepancies
identified in Piaggio SB No. 80-0405, Revision 0, dated March 15, 2021.
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 the FAA of the unsafe condition described in the MCAI and
service information referenced above. The FAA is issuing this NPRM
after determining 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 service information already described.

Differences Between This Proposed AD and the MCAI or Service
Information


The MCAI allows credit for the fuselage inner skin inspection if
previously done using Piaggio Aerospace Temporary Revision No. 332 to
Chapter 53-00-00 of Piaggio P.180 Avanti II Maintenance Manual, and this
proposed AD would not. The FAA will consider requests for an alternative
method of compliance for this under paragraph (h) of this AD.
The MCAI specifies compliance times of 8 months and 12 months
depending on when the P-180 airplane maintenance manual 3,600 flight
hour or 5-year inspection was accomplished. This proposed AD has a 12-
month compliance time for all airplanes because the 3,600 flight hour
and 5-year maintenance manual inspections are not required for U.S.
operators by FAA regulation.
The service information specifies contacting Piaggio for certain
repair instructions, while this proposed AD would require repair using
a method approved by the FAA or EASA.

Costs of Compliance

The FAA estimates that this AD, if adopted as proposed, would
affect 14 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this proposed
AD:

Estimated Costs

Action Labor cost Parts cost Cost per airplane Cost on U.S. operators
Inspections Up to 150 work-hours x $85 per hour = $12,750 $2,360 Up to $15,110 Up to $211,540

The FAA estimates the following costs to do any necessary actions
that may be required based on the results of the proposed inspections.
The FAA has no way of estimating the number of airplanes that might
need these actions:

On-Condition Costs

Action Labor cost Parts cost Cost per airplane
Repair Up to 80 work-hours x $85 per hour = $6,800 $1,220 Up to $8,020
Replace skin panel Up to 250 work- Up to hours x $85 per hour = $21,250 $12,200 Up to $33,450
Reporting Results 1 work-hour x $85 per hour = $85 Not Applicable $1,190

Paperwork Reduction Act

A federal agency may not conduct or sponsor, and a person is not
required to respond to, nor shall a person be subject to a penalty for
failure to comply with a collection of information subject to the
requirements of the Paperwork Reduction Act unless that collection of
information displays a currently valid OMB Control Number. The OMB
Control Number for this information collection is 2120-0056. Public
reporting for this collection of information is estimated to be
approximately 1 hour per response, including the time for reviewing
instructions, searching existing data sources, gathering and
maintaining the data needed, completing and reviewing the collection of
information. All responses to this collection of information are
mandatory. Send comments regarding this burden estimate or any other
aspect of this collection of information, including suggestions for
reducing this burden, to: Information Collection Clearance Officer,
Federal Aviation Administration, 10101 Hillwood Parkway, Fort Worth, TX
76177-1524.

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 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

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: