Voglio sapere a riguardo di…

Federal Register / Vol. 86, No. 101 / Thursday, May 27, 2021 / Rules and Regulations to the manager of the International Validation Branch, send it to the attention of the person identified in paragraph j of this AD.
Information may be emailed to: 9-AVS-AIR730-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.

DEPARTMENT OF TRANSPORTATION

j Related Information
Airworthiness Directives; De Havilland Aircraft of Canada Limited Type Certificate Previously Held by Bombardier, Inc. Airplanes
For more information about this AD, contact Kathleen Arrigotti, Program Manager, Large Aircraft Section, International Validation Branch, FAA, 2200 South 216th St., Des Moines, WA 98198; phone and fax:
2062313218; email: kathleen.arrigotti@
faa.gov.
k Material Incorporated by Reference 1 The Director of the Federal Register approved the incorporation by reference IBR of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise.
i European Aviation Safety Agency EASA AD 20170177, dated September 14, 2017.
ii Reserved 3 For EASA AD 20170177, contact the EASA, Konrad-Adenauer-Ufer 3, 50668
Cologne, Germany; telephone +49 221 8999
000; email ADs@easa.europa.eu; internet www.easa.europa.eu. You may find this EASA AD on the EASA website at https
ad.easa.europa.eu.
4 You may view this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 8172225110. This material may be found in the AD docket on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20201171.
5 You may view this material that is incorporated by reference at the National Archives and Records Administration NARA. For information on the availability of this material at NARA, email fedreg.legal@
nara.gov, or go to https www.archives.gov/
federal-register/cfr/ibr-locations.html.
Issued on May 3, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.

jbell on DSKJLSW7X2PROD with RULES

FR Doc. 202111080 Filed 52621; 8:45 am BILLING CODE 491013P

VerDate Sep<11>2014

16:14 May 26, 2021

Jkt 253001

Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210018; Project Identifier MCAI202001214T; Amendment 3921546; AD 20211013
RIN 2120AA64

Federal Aviation Administration FAA, Department of Transportation DOT.
ACTION: Final rule.
AGENCY:

28479

through Friday, except Federal holidays.
The AD docket contains this final rule, 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 W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:

Siddeeq Bacchus, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 5162287362; fax 5167945531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:

The FAA is superseding Airworthiness Directive AD 201517
08, which applied to certain Bombardier, Inc. Model DHC8400
series airplanes. AD 20151708
required installing new cable assemblies with a pull-down resistor. This AD
requires modifications to the nose wheel steering NWS system. This AD was prompted by a report indicating that several failure modes of the NWS
system may cause the loss of feedback from both rotary variable differential transformers to the steering control unit.
The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective July 1, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of July 1, 2021.
ADDRESSES: For service information identified in this final rule, contact De Havilland Aircraft of Canada Limited, Q-Series Technical Help Desk, 123
Garratt Boulevard, Toronto, Ontario M3K 1Y5, Canada; telephone 416375
4000; fax 4163754539; email thd@
dehavilland.com; internet https
dehavilland.com. You may view this referenced service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 2200 South 216th St., Des Moines, WA. For information on the availability of this material at the FAA, call 2062313195.
It is also available on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210018.

Discussion
Examining the AD Docket
Comments
You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0018; or in person at Docket Operations between 9 a.m. and 5 p.m., Monday
The FAA gave the public the opportunity to participate in developing this final rule. The FAA has considered the comment received. The Air Line Pilots Association, International ALPA
indicated its support for the NPRM.

SUMMARY:

PO 00000

Frm 00011

Fmt 4700

Sfmt 4700

Transport Canada Civil Aviation TCCA, which is the aviation authority for Canada, has issued TCCA AD CF
202028, dated August 14, 2020 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for certain De Havilland Aircraft of Canada Limited Model DHC8401 and 402 airplanes. You may examine the MCAI in the AD docket on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210018.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 to supersede AD 20151708, Amendment 3918241 80 FR 51459, August 25, 2015 AD 20151708. AD
20151708 applied to certain Bombardier, Inc. Model DHC8400
series airplanes. The NPRM published in the Federal Register on February 24, 2021 86 FR 11175. The NPRM was prompted by a report indicating that several failure modes of the NWS
system may cause the loss of feedback from both rotary variable differential transformers to the steering control unit.
The NPRM proposed to require modifications to the NWS system. The FAA is issuing this AD to address failure modes of the NWS system, which could lead to NWS runaway, loss of directional control of the airplane, and possible consequent runway excursion. See the MCAI for additional background information.

E:FRFM27MYR1.SGM

27MYR1