Airworthiness Directives; De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes, 41794-41798 [2021-16431]
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Federal Register / Vol. 86, No. 146 / Tuesday, August 3, 2021 / Proposed Rules
Revision 4, dated July 26, 2017 (SB 44301–
10–17). If the elastomeric energy absorber has
taken a permanent compression set, replace
the elastomeric energy absorber before the
next hoist operation.
(2) Replace the retaining ring by following
the Accomplishment Instructions, paragraphs
2.D through 2.K, of SB 44301–10–17.
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(h) New Requirements
Except as specified in paragraph (i) of this
AD: Comply with all required actions and
compliance times specified in, and in
accordance with, EASA AD 2021–0011.
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 (l)(5) 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.
(i) Exceptions to EASA AD 2021–0011
(1) Where EASA AD 2021–0011 refers to its
effective date, this AD requires using the
effective date of this AD.
(2) Paragraphs (1) and (2) of EASA AD
2021–0011 do not apply to this AD. The
equivalent FAA requirements are specified in
paragraph (g) of this AD.
(3) The ‘‘Remarks’’ section of EASA AD
2021–0011 does not apply to this AD.
(4) Where the service information
referenced in EASA AD 2021–0011 specifies
to discard certain parts, this AD requires
removing those parts from service.
(5) Where paragraph (3) of EASA AD 2021–
0011 specifies to modify using ‘‘the
instructions of the modification ASB,’’ this
AD requires using ‘‘paragraph 3.B.1 and 3.B.2
of the Accomplishment Instructions of the
modification ASB.’’
(6) Where the service information
referenced in EASA AD 2021–0011 specifies
to use tooling, equivalent tooling may be
used.
(7) Accomplishing the modification
specified in paragraph (3) of EASA AD 2021–
0011 or the replacement specified in
paragraph (4) of EASA AD 2021–0011
terminates the repetitive actions required by
paragraph (g) of this AD.
(8) Where paragraph (6) of EASA AD 2021–
0011 refers to October 25, 2017 (the effective
date of EASA AD 2017–0199), this AD
requires using the effective date of this AD;
and where paragraph (6) of EASA AD 2021–
0011 specified to do actions ‘‘as required by
paragraph (1) of this [EASA] AD,’’ for this
AD, do the actions required by paragraph (g)
of this AD.
(9) Paragraph (7) of EASA AD 2021–0011
does not apply to this AD. For this AD, for
helicopters that do not have an affected hoist
identified in paragraph (c) of this AD
installed: As of the effective date of this AD,
do not install an affected hoist identified in
paragraph (c) of this AD on any helicopter.
(l) Related Information
(j) Special Flight Permit
Special flight permits may be issued in
accordance with 14 CFR 21.197 and 21.199
to operate the helicopter to a location where
the required actions can be done to the
helicopter (if the operator elects to do so),
provided the hoist is not used.
[FR Doc. 2021–16467 Filed 8–2–21; 8:45 am]
(1) For EASA AD 2021–0011, 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.
(2) For Goodrich service information
identified in this AD, contact Airbus
Helicopters, 2701 N Forum Drive, Grand
Prairie, TX 75052; telephone (972) 641–0000
or (800) 232–0323; fax (972) 641–3775; or at
https://www.airbus.com/helicopters/services/
technical-support.html.
(3) You may view this material at the FAA,
Office of the Regional Counsel, Southwest
Region, 10101 Hillwood Pkwy., Room 6N–
321, Fort Worth, TX 76177. For information
on the availability of this material at the
FAA, call 817–222–5110. This material may
be found in the AD docket on the internet at
https://www.regulations.gov by searching for
and locating Docket No. FAA–2021–0611.
(4) Airbus Helicopters Alert Service
Bulletin No. ASB EC135–85A–069, Revision
0, dated August 2, 2017, which is not
incorporated by reference, contains
additional information about the actions
specified in paragraph (g) of this AD.
(5) For more information about this AD,
contact Jacob Fitch, Aerospace Engineer, COS
Program Management Section, Operational
Safety Branch, Compliance & Airworthiness
Division, FAA, 10101 Hillwood Pkwy., Fort
Worth, TX 76177; phone: (817) 222–4130;
email: jacob.fitch@faa.gov.
Issued on July 27, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
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Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA–2021–0613; Project
Identifier MCAI–2020–01431–T]
RIN 2120–AA64
Airworthiness Directives; De Havilland
Aircraft of Canada Limited (Type
Certificate Previously Held by
Bombardier, Inc.) Airplanes
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking
(NPRM).
AGENCY:
The FAA proposes to adopt a
new airworthiness directive (AD) for
certain De Havilland Aircraft of Canada
Limited Model DHC–8–400, –401, and
–402 airplanes. This proposed AD was
prompted by a report of cracking found
on a main landing gear (MLG) drag strut
assembly. This proposed AD would
require a records review to determine if
an affected MLG drag strut assembly is
installed, repetitive detailed inspections
for cracking of affected strut assemblies,
a one-time magnetic particle inspection
for cracking, and on-condition actions if
necessary. 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 September 17,
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.
SUMMARY:
Examining the AD Docket
You may examine the AD docket at
https://www.regulations.gov by
searching for and locating Docket No.
FAA–2021–0613; 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, any comments received, and
other information. The street address for
Docket Operations is listed above.
(k) 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
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DEPARTMENT OF TRANSPORTATION
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Federal Register / Vol. 86, No. 146 / Tuesday, August 3, 2021 / Proposed Rules
Aziz
Ahmed, Aerospace Engineer, Airframe
and Propulsion Section, FAA, New York
ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590;
telephone 516–228–7329; fax 516–794–
5531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
FOR FURTHER INFORMATION CONTACT:
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 ADDRESSES. Include ‘‘Docket No.
FAA–2021–0613; Project Identifier
MCAI–2020–01431–T’’ 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 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
NPRM. Submissions containing CBI
should be sent to Aziz Ahmed,
Aerospace Engineer, Airframe and
Propulsion Section, FAA, New York
ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590;
telephone 516–228–7329; fax 516–794–
5531; email 9-avs-nyaco-cos@faa.gov.
Any commentary that the FAA receives
which is not specifically designated as
CBI will be placed in the public docket
for this rulemaking.
Background
Transport Canada Civil Aviation
(TCCA), which is the aviation authority
for Canada, has issued TCCA AD CF–
2020–43, dated October 21, 2020
(referred to after this as the Mandatory
Continuing Airworthiness Information,
or ‘‘the MCAI’’), to correct an unsafe
condition for certain De Havilland
Aircraft of Canada Limited Model DHC–
8–400, –401, and –402 airplanes. You
may examine the MCAI in the AD
docket at https://www.regulations.gov
by searching for and locating Docket No.
FAA–2021–0613.
This proposed AD was prompted by
a report of cracking found on an MLG
drag strut assembly. The MLG drag strut
had accumulated a total of 26,968 flight
cycles and 12,392 flight hours since
new, of which 2,830 flight cycles and
1,420 flight hours had accumulated
since the last overhaul. The last
overhaul had been conducted one year
prior to the crack finding. It is suspected
that the cracking was caused by the
clamping method used by the repair
facility during the most recent overhaul,
and was missed during subsequent non-
41795
destructive testing (NDT) inspections
required as part of the refurbishment
process. The FAA is proposing this AD
to address cracking of the MLG drag
strut assembly and possible failure
under compression loads during landing
or ground operations, which could
result in asymmetric MLG configuration
and potential runway excursion. See the
MCAI for additional background
information.
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 the State
of Design Authority, the FAA has been
notified of the unsafe condition
described in the MCAI and service
information referenced above. The FAA
is proposing this AD because the FAA
evaluated all the relevant information
and determined 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 a
records review to determine if an
affected MLG drag strut assembly is
installed, repetitive detailed inspections
for cracking of affected strut assemblies,
a one-time magnetic particle inspection
for cracking, and on-condition actions if
necessary. On-condition actions include
replacing the MLG drag strut assembly
and re-identifying the MLG drag strut
assembly.
Costs of Compliance
The FAA estimates that this AD, if
adopted as proposed, would affect 34
airplanes of U.S. registry. The FAA
estimates the following costs to comply
with this proposed AD:
ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Up to 11 work-hours × $85 per hour = Up to $935 ................................
$0
Up to $935 ......................................
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The FAA estimates the following
costs to do any necessary on-condition
actions that would be required based on
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the results of any required actions. The
FAA has no way of determining the
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Cost on U.S.
operators
Up to $31,790.
number of aircraft that might need these
on-condition actions:
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Federal Register / Vol. 86, No. 146 / Tuesday, August 3, 2021 / Proposed Rules
ESTIMATED COSTS OF ON-CONDITION ACTIONS
Labor cost
Parts cost
Cost per product
Up to 10 work-hours × $85 per hour = Up to $850 ................................
$*
Up to $850 ......................................
Cost on U.S.
operators
Up to $850.
* The FAA has received no definitive data that would enable the agency to provide parts cost estimates for the actions specified in this proposed AD.
The FAA has included all known
costs in its cost estimate. According to
the manufacturer, however, some or all
of the costs of this proposed AD may be
covered under warranty, thereby
reducing the cost impact on affected
operators.
Authority for This Rulemaking
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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.
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
1. The authority citation for part 39
continues to read as follows:
■
Authority: 49 U.S.C. 106(g), 40113, 44701.
Regulatory Findings
§ 39.13
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
■
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[Amended]
2. The FAA amends § 39.13 by adding
the following new airworthiness
directive:
De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by
Bombardier, Inc.): Docket No. FAA–
2021–0613; Project Identifier MCAI–
2020–01431–T.
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(a) Comments Due Date
The FAA must receive comments on this
airworthiness directive (AD) by September
17, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to De Havilland Aircraft
of Canada Limited Model DHC–8–400, –401,
and –402 airplanes, certificated in any
category, serial numbers 4001, 4003, and
subsequent.
(d) Subject
Air Transport Association (ATA) of
America Code 32, Landing Gear.
(e) Unsafe Condition
This AD was prompted by a report of
cracking found on a main landing gear (MLG)
drag strut assembly. The FAA is issuing this
AD to address cracking of the MLG drag strut
assembly and possible failure under
compression loads during landing or ground
operations, which could result in asymmetric
MLG configuration and potential runway
excursion.
(f) Compliance
Comply with this AD within the
compliance times specified, unless already
done.
(g) Records Review, Repetitive Inspections,
and On-Condition Actions
Within 30 days after the effective date of
this AD: Review the applicable airplane
maintenance records to determine if any
affected MLG drag strut assembly identified
in figure 1 to the introductory text of
paragraph (g) of this AD is installed. If any
affected MLG drag strut assembly is installed,
do the actions specified in paragraphs (g)(1)
and (2) of this AD.
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41797
Figure 1 to the introductory text of paragraph (g) - Affected MLG Drag Strut
Assembly
Part Number
Serial N um her
MBM0056
MBM0073
MBM0076
MBM0130
MBM0136
MBM0145
MBM0179
MBM0204
MBM0208
46301-13
MBM0302
MBM0303
MBM0324
MBM0405
MBM0408
MBM0412
MBM0417
MBM0423
(1) Within 80 flight hours after
accomplishing the records review required
by paragraph (g) of this AD, do a detailed
inspection for cracking of the affected MLG
drag strut assembly, and do all applicable oncondition actions before further flight, in
accordance with a method approved by the
Manager, New York ACO Branch, FAA.
Repeat the inspection thereafter at intervals
not to exceed 80 flight hours until the
magnetic particle inspection required by
paragraph (g)(2) of this AD is done.
Note 1 to paragraph (g)(1): Guidance on
the inspections and on-condition actions
required by this AD can be found in
Transport Canada Civil Aviation (TCCA) AD
CF–2020–43, dated October 21, 2020.
(2) Within 1,600 flight hours or 12 months
after the effective date of this AD, whichever
occurs first, perform a magnetic particle
inspection for cracks of the entire tubular
section of the affected MLG drag strut
assembly, and do all on-condition actions
before further flight, in accordance with a
method approved by the Manager, New York
ACO Branch, FAA. Performing the magnetic
particle inspection required by this
paragraph terminates the repetitive detailed
inspections required by paragraph (g)(1) of
this AD.
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(h) Parts Installation Prohibition
As of the effective date of this AD, no
person may install an affected MLG drag strut
assembly identified in figure 1 to the
introductory text of paragraph (g) of this AD
on any airplane unless the inspections and
applicable on-conditions specified in
paragraphs (g)(1) and (2) of this AD are done
before further flight.
(i) Other FAA AD Provisions
The following provisions also apply to this
AD:
(1) Alternative Methods of Compliance
(AMOCs): The Manager, New York ACO
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
responsible Flight Standards Office, as
appropriate. If sending information directly
to the manager of the certification office,
send it to ATTN: Program Manager,
Continuing Operational Safety, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7300; fax 516–794–5531. Before
using any approved AMOC, notify your
appropriate principal inspector, or lacking a
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principal inspector, the manager of the
responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any
requirement in this AD to obtain instructions
from a manufacturer, the instructions must
be accomplished using a method approved
by the Manager, New York ACO Branch,
FAA; or Transport Canada Civil Aviation
(TCCA); or De Havilland Aircraft of Canada
Limited’s TCCA Design Approval
Organization (DAO). If approved by the DAO,
the approval must include the DAOauthorized signature.
(j) Related Information
(1) Refer to Mandatory Continuing
Airworthiness Information (MCAI) TCCA AD
CF–2020–43, dated October 21, 2020, for
related information. This MCAI may be
found in the AD docket on the internet at
https://www.regulations.gov by searching for
and locating Docket No. FAA–2021–0613.
(2) For more information about this AD,
contact Aziz Ahmed, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New
York ACO Branch, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone
516–228–7329; fax 516–794–5531; email 9avs-nyaco-cos@faa.gov.
(3) For information about TCCA AD CF–
2020–43, dated October 21, 2020, contact
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TCCA, Transport Canada National Aircraft
Certification, 159 Cleopatra Drive, Nepean,
Ontario K1A 0N5, Canada; telephone 888–
663–3639; email AD-CN@tc.gc.ca; internet
https://tc.canada.ca/en/aviation. You may
view this 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
206–231–3195.
Issued on July 28, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021–16431 Filed 8–2–21; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF HOMELAND
SECURITY
Coast Guard
33 CFR Part 100
[Docket Number USCG–2021–0540]
RIN 1625–AA08
Special Local Regulations, Choptank
River, Cambridge, MD
Coast Guard, DHS.
Notice of proposed rulemaking.
AGENCY:
ACTION:
The Coast Guard is proposing
to establish special local regulations for
certain waters of the Choptank River.
This action is necessary to provide for
the safety of life on navigable waters
located at Cambridge, MD, during a
high-speed power boat racing event on
October 9, 2021, and October 10, 2021.
This proposed rulemaking would
prohibit persons and vessels from being
in the regulated area unless authorized
by the Captain of the Port MarylandNational Capital Region or Coast Guard
Event Patrol Commander. We invite
your comments on this proposed
rulemaking.
DATES: Comments and related material
must be received by the Coast Guard on
or before September 2, 2021.
ADDRESSES: You may submit comments
identified by docket number USCG–
2021–0540 using the Federal
eRulemaking Portal at https://
www.regulations.gov. See the ‘‘Public
Participation and Request for
Comments’’ portion of the
SUPPLEMENTARY INFORMATION section for
further instructions on submitting
comments.
FOR FURTHER INFORMATION CONTACT: If
you have questions about this proposed
rulemaking, call or email Mr. Ron
Houck, Waterways Management
Division, U.S. Coast Guard; telephone
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SUMMARY:
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410–576–2674, email D05-DGSectorMD-NCR-MarineEvents@uscg.mil.
SUPPLEMENTARY INFORMATION:
I. Table of Abbreviations
CFR Code of Federal Regulations
COTP Captain of the Port
DHS Department of Homeland Security
Event PATCOM Event Patrol Commander
FR Federal Register
NPRM Notice of proposed rulemaking
§ Section
U.S.C. United States Code
II. Background, Purpose, and Legal
Basis
The Cambridge Power Boat Regatta
Association of Cambridge, MD, notified
the Coast Guard that it will be
conducting the Cambridge Classic
Power Boat Regatta from 10 a.m. to 5
p.m. on October 9, 2021, and from 10
a.m. to 5 p.m. on October 10, 2021. The
high-speed power boat racing event
consists of approximately 60
participating inboard and outboard
hydroplane and runabout race boats of
various classes, 16 to 24 feet in length.
The vessels will be competing on a
designated, marked 1-mile oval course
located in the Choptank River in a cove
located between Hambrooks Bar and the
shoreline at Cambridge, MD. Hazards
from the power boat racing event
include risks of injury or death resulting
from near or actual contact among
participant vessels and spectator vessels
or waterway users if normal vessel
traffic were to interfere with the event.
Additionally, such hazards include
participants operating near designated
navigation channels, as well as
operating near approaches to local
public boat ramps, private marinas and
yacht clubs, and waterfront businesses.
The COTP Maryland-National Capital
Region has determined that potential
hazards associated with the power boat
races would be a safety concern for
anyone intending to operate within
certain waters of the Choptank River at
Cambridge, MD.
The purpose of this rulemaking is to
protect event participants, spectators,
and transiting vessels on certain waters
of Choptank River before, during, and
after the scheduled event. The Coast
Guard proposes this rulemaking under
authority in 46 U.S.C. 70041.
III. Discussion of Proposed Rule
The COTP Maryland-National Capital
Region is proposing to establish special
local regulations from 9 a.m. on October
9, 2021, until 6 p.m. on October 10,
2021. The special local regulations
would be enforced from 9 a.m. to 6 p.m.
on October 9th and those same hours on
October 10th. The regulated area would
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cover all navigable waters within
Choptank River and Hambrooks Bay
bounded by a line connecting the
following coordinates: Commencing at
the shoreline at Long Wharf Park,
Cambridge, MD, at position latitude
38°34′30″ N, longitude 076°04′16″ W;
thence east to latitude 38°34′20″ N,
longitude 076°03′46″ W; thence
northeast across the Choptank River
along the Senator Frederick C. Malkus,
Jr. (US–50) Memorial Bridge, at mile
15.5, to latitude 38°35′30″ N, longitude
076°02′52″ W; thence west along the
shoreline to latitude 38°35′38″ N,
longitude 076°03′09″ W; thence north
and west along the shoreline to latitude
38°36′42″ N, longitude 076°04′15″ W;
thence southwest across the Choptank
River to latitude 38°35′31″ N, longitude
076°04′57″ W; thence west along the
Hambrooks Bay breakwall to latitude
38°35′33″ N, longitude 076°05′17″ W;
thence south and east along the
shoreline to and terminating at the point
of origin in Dorchester County, MD.
This proposed rule provides
additional information about areas
within the regulated area, and the
restrictions that apply to mariners.
These areas include a ‘‘Race Area,’’
‘‘Buffer Area’’ and ‘‘Spectator Area’’.
The proposed duration of the rule and
size of the regulated area are intended
to ensure the safety of life on these
navigable waters before, during, and
after the high-speed power boat races,
scheduled from 10 a.m. until 5 p.m. on
October 9, 2021 and October 10, 2021.
The COTP and Coast Guard Event Patrol
Commander (Event PATCOM) would
have authority to forbid and control the
movement of all vessels and persons,
including event participants, in the
regulated area. When hailed or signaled
by an official patrol, a vessel or person
in the regulated area would be required
to immediately comply with the
directions given by the COTP or Event
PATCOM. If a person or vessel fails to
follow such directions, the Coast Guard
may expel them from the area, issue
them a citation for failure to comply, or
both.
Except for Cambridge Classic Power
Boat Regatta participants and vessels
already at berth, a vessel or person
would be required to get permission
from the COTP or Event PATCOM
before entering the regulated area while
the rule is being enforced. Vessel
operators could request permission to
enter and transit through the regulated
area by contacting the Event PATCOM
on VHF–FM channel 16. Vessel traffic
would be able to safely transit the
regulated area once the Event PATCOM
deems it safe to do so. A person or
vessel not registered with the event
E:\FR\FM\03AUP1.SGM
03AUP1
]]>Agencies
[Federal Register Volume 86, Number 146 (Tuesday, August 3, 2021)]
[Proposed Rules]
[Pages 41794-41798]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-16431]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0613; Project Identifier MCAI-2020-01431-T]
RIN 2120-AA64
Airworthiness Directives; De Havilland Aircraft of Canada Limited
(Type Certificate Previously Held by Bombardier, Inc.) 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 De Havilland Aircraft of Canada Limited Model DHC-8-400, -
401, and -402 airplanes. This proposed AD was prompted by a report of
cracking found on a main landing gear (MLG) drag strut assembly. This
proposed AD would require a records review to determine if an affected
MLG drag strut assembly is installed, repetitive detailed inspections
for cracking of affected strut assemblies, a one-time magnetic particle
inspection for cracking, and on-condition actions if necessary. 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 September
17, 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.
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-0613; 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, any comments
received, and other information. The street address for Docket
Operations is listed above.
[[Page 41795]]
FOR FURTHER INFORMATION CONTACT: Aziz Ahmed, Aerospace Engineer,
Airframe and Propulsion Section, FAA, New York ACO Branch, 1600 Stewart
Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7329; fax 516-
794-5531; email [email protected].
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 ADDRESSES. Include ``Docket No. FAA-2021-0613; Project Identifier
MCAI-2020-01431-T'' 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
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 NPRM. Submissions containing CBI should be sent to Aziz
Ahmed, Aerospace Engineer, Airframe and Propulsion Section, FAA, New
York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7329; fax 516-794-5531; email [email protected]. Any commentary that the FAA receives which is not
specifically designated as CBI will be placed in the public docket for
this rulemaking.
Background
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2020-43, dated October 21,
2020 (referred to after this as the Mandatory Continuing Airworthiness
Information, or ``the MCAI''), to correct an unsafe condition for
certain De Havilland Aircraft of Canada Limited Model DHC-8-400, -401,
and -402 airplanes. You may examine the MCAI in the AD docket at
https://www.regulations.gov by searching for and locating Docket No.
FAA-2021-0613.
This proposed AD was prompted by a report of cracking found on an
MLG drag strut assembly. The MLG drag strut had accumulated a total of
26,968 flight cycles and 12,392 flight hours since new, of which 2,830
flight cycles and 1,420 flight hours had accumulated since the last
overhaul. The last overhaul had been conducted one year prior to the
crack finding. It is suspected that the cracking was caused by the
clamping method used by the repair facility during the most recent
overhaul, and was missed during subsequent non-destructive testing
(NDT) inspections required as part of the refurbishment process. The
FAA is proposing this AD to address cracking of the MLG drag strut
assembly and possible failure under compression loads during landing or
ground operations, which could result in asymmetric MLG configuration
and potential runway excursion. See the MCAI for additional background
information.
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 the State of Design Authority,
the FAA has been notified of the unsafe condition described in the MCAI
and service information referenced above. The FAA is proposing this AD
because the FAA evaluated all the relevant information and determined
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 a records review to determine if an
affected MLG drag strut assembly is installed, repetitive detailed
inspections for cracking of affected strut assemblies, a one-time
magnetic particle inspection for cracking, and on-condition actions if
necessary. On-condition actions include replacing the MLG drag strut
assembly and re-identifying the MLG drag strut assembly.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 34 airplanes of U.S. registry. The FAA estimates the following
costs to comply with this proposed AD:
Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 11 work-hours x $85 per hour = $0 Up to $935.............. Up to $31,790.
Up to $935.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need these on-condition actions:
[[Page 41796]]
Estimated Costs of On-Condition Actions
----------------------------------------------------------------------------------------------------------------
Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 10 work-hours x $85 per hour = $ * Up to $850.............. Up to $850.
Up to $850.
----------------------------------------------------------------------------------------------------------------
* The FAA has received no definitive data that would enable the agency to provide parts cost estimates for the
actions specified in this proposed AD.
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all 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) 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:
De Havilland Aircraft of Canada Limited (Type Certificate Previously
Held by Bombardier, Inc.): Docket No. FAA-2021-0613; Project
Identifier MCAI-2020-01431-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by September 17, 2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to De Havilland Aircraft of Canada Limited Model
DHC-8-400, -401, and -402 airplanes, certificated in any category,
serial numbers 4001, 4003, and subsequent.
(d) Subject
Air Transport Association (ATA) of America Code 32, Landing
Gear.
(e) Unsafe Condition
This AD was prompted by a report of cracking found on a main
landing gear (MLG) drag strut assembly. The FAA is issuing this AD
to address cracking of the MLG drag strut assembly and possible
failure under compression loads during landing or ground operations,
which could result in asymmetric MLG configuration and potential
runway excursion.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Records Review, Repetitive Inspections, and On-Condition Actions
Within 30 days after the effective date of this AD: Review the
applicable airplane maintenance records to determine if any affected
MLG drag strut assembly identified in figure 1 to the introductory
text of paragraph (g) of this AD is installed. If any affected MLG
drag strut assembly is installed, do the actions specified in
paragraphs (g)(1) and (2) of this AD.
BILLING CODE 4910-13-P
[[Page 41797]]
[GRAPHIC] [TIFF OMITTED] TP03AU21.001
BILLING CODE 4910-13-C
(1) Within 80 flight hours after accomplishing the records
review required by paragraph (g) of this AD, do a detailed
inspection for cracking of the affected MLG drag strut assembly, and
do all applicable on-condition actions before further flight, in
accordance with a method approved by the Manager, New York ACO
Branch, FAA. Repeat the inspection thereafter at intervals not to
exceed 80 flight hours until the magnetic particle inspection
required by paragraph (g)(2) of this AD is done.
Note 1 to paragraph (g)(1): Guidance on the inspections and on-
condition actions required by this AD can be found in Transport
Canada Civil Aviation (TCCA) AD CF-2020-43, dated October 21, 2020.
(2) Within 1,600 flight hours or 12 months after the effective
date of this AD, whichever occurs first, perform a magnetic particle
inspection for cracks of the entire tubular section of the affected
MLG drag strut assembly, and do all on-condition actions before
further flight, in accordance with a method approved by the Manager,
New York ACO Branch, FAA. Performing the magnetic particle
inspection required by this paragraph terminates the repetitive
detailed inspections required by paragraph (g)(1) of this AD.
(h) Parts Installation Prohibition
As of the effective date of this AD, no person may install an
affected MLG drag strut assembly identified in figure 1 to the
introductory text of paragraph (g) of this AD on any airplane unless
the inspections and applicable on-conditions specified in paragraphs
(g)(1) and (2) of this AD are done before further flight.
(i) Other FAA AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York ACO 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 responsible Flight Standards Office, as appropriate. If
sending information directly to the manager of the certification
office, send it to ATTN: Program Manager, Continuing Operational
Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. Before
using any approved AMOC, notify your appropriate principal
inspector, or lacking a principal inspector, the manager of the
responsible Flight Standards Office.
(2) Contacting the Manufacturer: For any requirement in this AD
to obtain instructions from a manufacturer, the instructions must be
accomplished using a method approved by the Manager, New York ACO
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or De
Havilland Aircraft of Canada Limited's TCCA Design Approval
Organization (DAO). If approved by the DAO, the approval must
include the DAO-authorized signature.
(j) Related Information
(1) Refer to Mandatory Continuing Airworthiness Information
(MCAI) TCCA AD CF-2020-43, dated October 21, 2020, for related
information. This MCAI may be found in the AD docket on the internet
at https://www.regulations.gov by searching for and locating Docket
No. FAA-2021-0613.
(2) For more information about this AD, contact Aziz Ahmed,
Aerospace Engineer, Airframe and Propulsion Section, FAA, New York
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7329; fax 516-794-5531; email [email protected].
(3) For information about TCCA AD CF-2020-43, dated October 21,
2020, contact
[[Page 41798]]
TCCA, Transport Canada National Aircraft Certification, 159
Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-663-
3639; email [email protected]; internet https://tc.canada.ca/en/aviation. You may view this 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 206-231-3195.
Issued on July 28, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2021-16431 Filed 8-2-21; 8:45 am]
BILLING CODE 4910-13-P
