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Proposed Rules
Federal Register Vol. 86, No. 178
Friday, September 17, 2021

This section of the FEDERAL REGISTER
contains notices to the public of the proposed issuance of rules and regulations. The purpose of these notices is to give interested persons an opportunity to participate in the rule making prior to the adoption of the final rules.

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210786; Project Identifier MCAI202100429A
RIN 2120AA64

Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Notice of proposed rulemaking NPRM.
AGENCY:

The FAA proposes to supersede Airworthiness Directive AD
20120616, which applies to all Pilatus Aircraft Ltd. Pilatus Models PC6, PC
6H1, PC6H2, PC6/350, PC6/350
H1, PC6/350H2, PC6/A, PC6/AH1, PC6/AH2, PC6/BH2, PC6/B1H2, PC6/B2H2, PC6/B2H4, PC6/CH2, and PC6/C1H2 airplanes. AD 2012
0616 requires installing a new rudder and elevator locking screw and modifying the installation of the rudder and elevator hinge bolt. Since the FAA
issued AD 20120616, the European Union Aviation Safety Agency EASA
superseded its mandatory continuing airworthiness information MCAI to correct an unsafe condition on these products. This proposed AD would not retain any actions required by AD 2012
0616 and would require inspecting and modifying the rudder, elevator, and right-hand RH aileron hinge bolt installations. 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 1, 2021.
SUMMARY:

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.

ADDRESSES:

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Fax: 202 4932251.
Mail: U.S. Department of Transportation, Docket Operations, M
30, West Building Ground Floor, Room W12140, 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., Customer Support General Aviation, CH6371 Stans, Switzerland; phone:
+41 848 24 7 365; email:
techsupport.ch@pilatus-aircraft.com;
website: https www.pilatusaircraft.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 3294148.
Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.
FAA20210786; 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 3294059; fax: 816 3294090;
email: doug.rudolph@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposed AD.
Send your comments to an address listed under the ADDRESSES section.
Include Docket No. FAA20210786;
Project Identifier MCAI202100429
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
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amend the 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 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 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 FAA issued AD 20120616, Amendment 3916997 77 FR 19061, March 30, 2012 AD 20120616 for Pilatus Models PC6, PC6H1, PC6
H2, PC6/350, PC6/350H1, PC6/
350H2, PC6/A, PC6/AH1, PC6/A
H2, PC6/BH2, PC6/B1H2, PC6/
B2H2, PC6/B2H4, PC6/CH2, and PC6/C1H2 airplanes. AD 20120616
was prompted by MCAI originated by EASA, which is the Technical Agent for the Member States of the European Union. EASA issued EASA AD 2011
0230, dated December 9, 2011, to identify and correct an unsafe condition identified as loose elevator and rudder
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