Special Conditions: SNECMA, Silvercrest-2 SC-2D; Rated 10-Minute One Engine Inoperative Takeoff Thrust at High Ambient Temperature, 44321-44324 [2014-18074]
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Federal Register / Vol. 79, No. 147 / Thursday, July 31, 2014 / Proposed Rules
parties. The FAA will also reach out to
our bilateral partners (i.e., Transport
Canada Civil Aviation and the European
Aviation Safety Agency) and invite their
participation in this effort. Parties
interested in this initiative may look
forward to future public announcements
on upcoming developments.
Issued in Fort Worth, TX, on July 10, 2014.
Kimberly K. Smith,
Manager, Rotorcraft Directorate, Aircraft
Certification Service.
[FR Doc. 2014–16999 Filed 7–30–14; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 33
[Docket No.FAA–2014–0376; Notice No. 33–
14–01–SC]
Special Conditions: SNECMA,
Silvercrest-2 SC–2D; Rated 10-Minute
One Engine Inoperative Takeoff Thrust
at High Ambient Temperature
Federal Aviation
Administration (FAA), DOT.
ACTION: Notice of proposed special
conditions.
AGENCY:
This action proposes special
conditions for the SNECMA, Silvercrest2 SC–2D engine model. This engine will
have a novel or unusual design
feature—an additional takeoff rating that
increases the exhaust gas temperature
(EGT) limit to maintain takeoff thrust in
certain high ambient temperature
conditions with one engine inoperative
(OEI) for a maximum of 10 minutes. The
applicable airworthiness regulations do
not contain adequate or appropriate
safety standards for this design feature.
The proposed special conditions
contain the additional safety standards
that the Administrator considers
necessary to establish a level of safety
equivalent to that established by the
existing airworthiness standards.
DATES: Send your comments on or
before September 2, 2014.
ADDRESSES: Send comments identified
by docket number [FAA–2014–0376]
using any of the following methods:
• Federal eRegulations Portal: Go to
https://www.regulations.gov and follow
the online instructions for sending your
comments electronically.
• Mail: Send comments to Docket
Operations, M–30, U.S. Department of
Transportation (DOT), 1200 New Jersey
Avenue SE., Room W12–140, West
Building Ground Floor, Washington,
DC, 20590–0001.
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SUMMARY:
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• Hand Delivery of Courier: Take
comments to Docket Operations in
Room W12–140 of the West Building
Ground Floor at 1200 New Jersey
Avenue SE., Washington, DC, between 8
a.m., and 5 p.m., Monday through
Friday, except Federal holidays.
• Fax: Fax comments to Docket
Operations at 202–493–2251.
Privacy: Docket Operations will post
all comments it receives, without
change, to https://regulations.gov,
including any personal information the
commenter provides. Using the search
function of the docket Web site, anyone
can find and read the electronic form of
all comments received into any FAA
docket, including the name of the
individual sending the comment (or
signing the comment for an association,
business, labor union, etc.). DOT’s
complete Privacy Act Statement can be
found in the Federal Register published
on April 11, 2000 (65 FR 19477–19478),
as well as at https://DocketsInfo.dot.gov.
Docket: You may read background
documents or comments received at
https://www.regulations.gov at any time.
Follow the online instructions for
accessing the docket or go to the Docket
Operations in Room W12–140 of the
West Building Ground Floor at 1200
New Jersey Avenue SE., Washington,
DC, between 9 a.m., and 5 p.m., Monday
through Friday, except federal holidays.
FOR FURTHER INFORMATION CONTACT: For
technical questions concerning this
proposed rule, contact Tara Fitzgerald,
ANE–111, Engine and Propeller
Directorate, Aircraft Certification
Service, 12 New England Executive
Park, Burlington, Massachusetts, 01803–
5213; telephone (781) 238–7130;
facsimile (781) 238–7199. For legal
questions concerning this proposed
rule, contact Vincent Bennett, ANE–7,
Engine and Propeller Directorate,
Aircraft Certification Service, 12 New
England Executive Park, Burlington,
Massachusetts, 01803–5299; telephone
(781) 238–7044; facsimile (781) 238–
7055; email vincent.bennett@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite interested persons to
participate in this rulemaking by
submitting written comments, data, or
views. The agency also invites
comments relating to the economic,
environmental, energy, or federalism
impacts that might result from adopting
the proposals in this document. The
most helpful comments reference a
specific portion of the proposal, explain
the reason for any recommended
change, and include supporting data. To
ensure the docket does not contain
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duplicate comments, commenters
should send only one copy of written
comments, or if comments are filed
electronically, commenters should
submit only one time.
We will file in the docket all
comments it receives, as well as a report
summarizing each substantive public
contact with FAA personnel concerning
this proposed rulemaking. Before acting
on this proposal, we will consider
comments filed late if it is possible to
do so without incurring expense or
delay. We may change these special
conditions based on the comments we
receive.
Background
On April 19, 2011, SNECMA applied
for a new type certificate (TC) for the
Silvercrest-2 SC–2D engine model. On
April 30, 2014, SNECMA requested an
extension to their original TC
application, which the FAA granted
through June 30, 2015.
For their Silvercrest-2 SC–2D engine
model, SNECMA requests an additional
takeoff rating to maintain takeoff thrust
in certain high ambient temperature
conditions with OEI. Therefore, the
Silvercrest-2 SC–2D engine model
would have two different takeoff ratings.
The first rating corresponds with the
rated takeoff thrust of the engine. The
second takeoff rating maintains the
takeoff thrust in certain high ambient
temperature conditions for a maximum
of 10 minutes. This additional takeoff
rating is named, ‘‘Rated 10-Minute OEI
Takeoff Thrust at High Ambient
Temperature’’ (Rated 10-minute OEI
TOTHAT).
These special conditions are
necessary because the applicable
airworthiness regulations do not contain
adequate or appropriate safety standards
for the additional takeoff rating.
Type Certification Basis
Under the provisions of Title 14, Code
of Federal Regulations (14 CFR) 21.17,
SNECMA must show that the
Silvercrest-2 SC–2D meets the
applicable provisions of the applicable
regulations in effect on the date of
application, except as detailed in
paragraphs 21.101(b) and (c). The FAA
has determined the following
certification basis for the Silvercrest-2
SC–2D engine model:
1. 14 CFR part 33, ‘‘Airworthiness
Standards Aircraft Engines,’’ dated
February 1, 1965, with Amendments
33–1 through 33–31, dated July 18,
2011.
If the FAA finds that the regulations
in effect on the date of the application
for the change do not provide adequate
or appropriate safety standards for the
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Federal Register / Vol. 79, No. 147 / Thursday, July 31, 2014 / Proposed Rules
Silvercrest-2 SC–2D because of a novel
or unusual design feature, special
conditions are prescribed under the
provisions of § 21.16.
Special conditions are initially
applicable to the model for which they
are issued. Should the type certificate
for that model be amended later to
include any other model that
incorporates the same or similar novel
or unusual design feature, the special
conditions would also apply to the other
model under § 21.101.
In addition to complying with the
applicable product airworthiness
regulations and the requirements of
these special conditions, the Silvercrest2 SC–2D engine model must also
comply with the fuel vent and exhaust
emission requirements of 14 CFR part
34 and the noise certification
requirements of 14 CFR part 36 in
accordance with the ‘‘Noise Control Act
of 1972.’’
The FAA issues special conditions, as
defined in 14 CFR 11.19, per § 11.38,
and they become part of the type
certification basis under § 21.17(a)(2).
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Novel or Unusual Design Features
The Silvercrest-2 SC–2D engine
model will incorporate the following
novel or unusual design feature:
The SNECMA Silvercrest-2 SC–2D
engine model will incorporate an
additional takeoff rating to maintain
takeoff thrust in certain high ambient
temperature OEI takeoff conditions for a
maximum of 10 minutes. The result will
be two different takeoff ratings, one for
the rated takeoff thrust of the engine and
the other to maintain the takeoff thrust
in certain high ambient temperature OEI
takeoff conditions for a maximum of 10
minutes. The additional takeoff rating is
referred to as ‘‘Rated 10-Minute OEI
Takeoff Thrust at High Ambient
Temperature’’ (Rated 10-minute OEI
TOTHAT).
The Rated 10-minute OEI TOTHAT is
a novel and unusual design feature that
requires additional airworthiness
standards for type certification of the
SNECMA Silvercrest-2 SC–2D engine
model.
Discussion
These proposed special conditions are
necessary because current part 33
regulations do not contain airworthiness
standards for airplane applications of
OEI ratings. For an airplane application,
the OEI rating is the same as the rated
thrust of the engine. All OEI ratings in
current part 33 regulations are only
applicable to rotorcraft applications.
These proposed special conditions
were modeled based on the rotorcraft
requirements for the 30-second and 2-
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minute OEI ratings, and modified to
represent the airplane application. The
Rated 10-minute OEI TOTHAT is
similar to the 30-second and 2-minute
OEI ratings available in part 33 for
rotorcraft engines. The Rated 10-minute
OEI TOTHAT shares common features,
such as the need to notify the pilot and
maintenance personnel about the
rating’s use, provides data needed for
power assurance check, and continued
validation of the related maintenance
procedures.
The Rated 10-minute OEI TOTHAT is
for use during OEI events that occur
during takeoff in high ambient
temperature conditions, up to 5 degrees
Celsius hotter than the rated takeoff
thrust corner point. Under these unique
conditions (extreme hot day and OEI),
the Rated 10-minute OEI TOTHAT leads
to an increase in EGT to maintain the
takeoff thrust of the engine. These
proposed special conditions contain
additional mandatory post-flight
inspection and maintenance action
requirements associated with any use of
the Rated 10-minute OEI TOTHAT.
These requirements add a rating
definition in part 1.1 and mandates
mandatory inspections in the ICA;
instructions for installing and operating
the engine; engine rating and operating
limitations; instrument connection; and
endurance testing.
The current requirements of the
endurance test under § 33.87 represent a
typical airplane flight profile and the
severity of the takeoff rating. Therefore,
the endurance test under § 33.87 covers
normal all-engines-operating takeoff
conditions for which the engine control
system limits the engine to the takeoff
thrust rating. The proposed special
conditions for the endurance testing
requirements are intended to represent
the airplane flight profile when an OEI
event occurs during takeoff under
specified ambient temperatures, and
until the mandatory inspection and
maintenance actions can be performed.
These proposed special conditions
require endurance testing that is not less
than 135 minutes in duration and
demonstrates the engine is capable of
the additional Rated 10-minute OEI
TOTHAT rating at the higher EGT limit
following completion of the tests
required by § 33.87(b), without
disassembly or modification.
The associated engine deterioration
after use of the Rated 10-minute OEI
TOTHAT is not known without the
intervening mandatory inspections in
these special conditions. The mandatory
inspections ensure the engine will
continue to comply with its certification
basis after any use of the Rated 10minute OEI TOTHAT. The applicant is
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expected to assess the deterioration
from use of the Rated 10-minute OEI
TOTHAT. The Airworthiness
Limitations section must prescribe the
mandatory post-flight inspections and
maintenance actions associated with
any use of the Rated 10-minute OEI
TOTHAT.
These requirements maintain a level
of safety equivalent to the level
intended by the applicable
airworthiness standards in effect on the
date of application.
Applicability
As discussed above, these special
conditions are applicable to the
Silvercrest-2 SC–2D engine model.
Should SNECMA apply at a later date
for a change to the type certificate to
include another engine model
incorporating the same novel or unusual
design feature, these special conditions
would apply to that model as well.
Conclusion
This action affects only the Rated 10minute OEI TOTHAT features on the
Silvercrest-2 SC–2D engine model. It is
not a rule of general applicability and
applies only to SNECMA, who
requested FAA approval of this engine
feature.
List of Subjects in 14 CFR Part 33
Air Transportation, Aircraft, Aviation,
Aviation safety, Safety.
The authority citation for these
special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701,
44702, 44704.
The Proposed Special Conditions
Accordingly, the FAA proposes the
following special conditions as part of
the type certification basis for the
SNECMA Silvercrest-2 SC–2D engine
model.
1. Part 1.1 Definitions.
‘‘Rated 10-Minute One Engine
Inoperative Take-off Thrust at High
Ambient Temperature’’ (Rated 10minute OEI TOTHAT) means the
approved engine thrust developed
under specified altitudes and
temperatures within the operating
limitations established for the engine,
and for continuation of flight operation
after failure or shutdown of one engine
in a multi-engine airplane during takeoff
operation. Use is limited to two periods,
no longer than 10 minutes each in any
one flight, and followed by mandatory
inspection and maintenance actions.
2. Part 33 Requirements.
In addition to the airworthiness
standards in 14 CFR part 33, effective
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February 1, 1965, Amendments 33–1
through 33–31 applicable to the engine
and the Rated 10-minute OEI TOTHAT,
the following special conditions apply:
§ 33.4 Instructions for Continued
Airworthiness.
(a) The Airworthiness Limitations
section must prescribe the mandatory
post-flight inspections and maintenance
actions associated with any use of the
Rated 10-minute OEI TOTHAT.
(b) The applicant must validate the
adequacy of the inspections and
maintenance actions required under
paragraph § 33.4(a) of these special
conditions.
(c) The applicant must establish an inservice engine evaluation program to
ensure the continued adequacy of the
instructions for mandatory post-flight
inspections and maintenance actions
prescribed under paragraph § 33.4(a) of
these special conditions, and of the data
for thrust assurance procedures required
by § 33.5(b)(1) of these special
conditions. The program must include
service engine tests or equivalent
service engine test experience on
engines of similar design and
evaluations of service use of the Rated
10-minute OEI TOTHAT.
§ 33.5 Instruction manual for installing and
operating the engine.
(a) Installation Instructions:
(1) The applicant must identify the
means, or provisions for means,
provided in compliance with the
requirements of § 33.29 of these special
conditions.
(2) The applicant must specify that
the engine thrust control system
automatically resets the thrust on the
operating engine to the Rated 10-minute
OEI TOTHAT level when one engine
fails during takeoff at specified altitudes
and temperatures, and that the Rated 10minute OEI TOTHAT is not available
when all engines are operational.
(b) Operating Instructions:
(1) The applicant must provide data
on engine performance characteristics
and variability to enable the airplane
manufacturer to establish airplane
thrust assurance procedures.
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§ 33.7 Engine ratings and operating
limitations.
(a) The Rated 10-minute OEI
TOTHAT and the associated operating
limitations are established as follows:
(1) The thrust is the same as the
engine takeoff rated thrust with
extended flat rating corner point,
(2) The rotational speed limits are the
same as those associated with the
engine takeoff rated thrust,
(3) The applicant must establish a gas
temperature steady-state limit and, if
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necessary, a transient gas
overtemperature limit for which the
time duration is no longer than 30
seconds, and
(4) The use is limited to two periods
of no longer than 10 minutes each in
any one flight, and followed by
mandatory inspection and maintenance
actions prescribed by § 33.4(a) of these
special conditions.
(b) The applicant must propose
language to include in the type
certificate data sheet specified in § 21.41
for the following:
(1) The Rated 10-minute OEI
TOTHAT and associated limitations.
(2) As required by § 33.5(b), Operating
instructions, include a note stating that
‘‘Rated 10-Minute One Engine
Inoperative Take-off Thrust at High
Ambient Temperature’’ (Rated 10minute OEI TOTHAT) means the
approved engine thrust developed
under specified altitudes and
temperatures within the operating
limitations established for the engine,
and for continuation of flight operation
after failure or shutdown of one engine
in multi-engine airplane during takeoff
operation. Use is limited to two periods,
no longer than 10 minutes each in any
one flight, and followed by mandatory
inspection and maintenance actions.
(3) As required by § 33.5(b), Operating
instructions, include a note stating that
the engine thrust control system
automatically resets the thrust on the
operating engine to the Rated 10-minute
OEI TOTHAT level when one engine
fails during takeoff at specified altitudes
and temperatures, and that the Rated 10minute OEI TOTHAT is not available
when all engines are operational.
§ 33.28
Engine control systems.
(a) The engine must incorporate a
means, or a provision for a means, for
automatic availability and automatic
control of the Rated 10-minute OEI
TOTHAT.
(b) The engine controls managing the
OEI takeoff thrust for all ambient
conditions must assure that:
(1) The approved rated takeoff thrust
is available to the pilot at all times by
throttle selection, and
(2) The Rated 10-minute OEI
TOTHAT is only available in an OEI
condition at specified altitudes and
temperatures.
§ 33.29
Instrument connection.
(a) The engine must:
(1) Have means or provisions for
means, to alert the pilot when the Rated
10-minute OEI TOTHAT is in use, when
the event begins, and when the time
interval expires.
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(2) Have means, or provision for
means, which cannot be reset in flight,
to:
(i) Automatically record each use and
duration of the Rated 10-minute OEI
TOTHAT, and
(ii) Alert maintenance personnel that
the engine has been operated at the
Rated 10-minute OEI TOTHAT, and
permit retrieval of recorded data.
(iii) Have means, or provision for
means, to enable routine verification of
the proper operation of the means in
§§ 33.29(1) and (2) of these special
conditions.
§ 33.85(b)
Calibration tests.
The applicant must base the
calibration test on the thrust check at
the end of the endurance test required
by § 33.87 of these special conditions.
§ 33.87
Endurance test.
(a) Following completion of the tests
required by § 33.87(b), and without
intervening disassembly, except as
needed to replace those parts described
as consumables in the ICA, the
applicant must conduct the following
test sequence for a total time of not less
than 135 minutes:
(1) Ten minutes at Rated 10-minute
OEI TOTHAT,
(2) Sixty-five minutes at maximum
continuous thrust,
(3) One minute at 50 percent of
takeoff thrust,
(4) Ten minutes at Rated 10-minute
OEI TOTHAT,
(5) One minute at flight idle,
(6) Ten minutes at Rated 10-minute
OEI TOTHAT,
(7) Five minutes at maximum
continuous thrust,
(8) One minute at 50 percent of
takeoff thrust,
(9) Five minutes at Rated 10-minute
OEI TOTHAT,
(10) One minute at flight idle,
(11) Ten minutes at Rated 10-minute
OEI TOTHAT,
(12) Five minutes at maximum
continuous thrust,
(13) One minute at 50 percent of
takeoff thrust,
(14) Nine minutes at Rated 10-minute
OEI TOTHAT, and
(15) One minute at flight idle
(b) The test sequence of §§ 33.87(a)(1)
through (a)(15) of these special
conditions must be run continuously. If
a stop occurs during these tests, the
interrupted sequence must be repeated
unless the applicant shows that the
severity of the test would not be
reduced if the current tests were
continued.
(c) Where the engine characteristics
are such that acceleration to the Rated
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Federal Register / Vol. 79, No. 147 / Thursday, July 31, 2014 / Proposed Rules
10-minute OEI TOTHAT results in a
transient overtemperature in excess of
the steady-state temperature limit
identified in § 33.7(a)(3) of these special
conditions, the transient gas
overtemperature must be applied to
each acceleration to the Rated 10minute OEI TOTHAT of the test
sequence in § 33.87(a) of these special
conditions.
§ 33.93
Teardown inspection.
The applicant must perform the
teardown inspection required by
§ 33.93(a) after completing the
endurance test prescribed by § 33.87 of
these special conditions.
§ 33.201 Design and test requirements for
Early ETOPS eligibility.
In addition to the requirements of
§ 33.201(c)(1), the simulated ETOPS
mission cyclic endurance test must
include two cycles of 10 minute
duration, each at the Rated 10-minute
OEI TOTHAT; one before the last
diversion cycle and one at the end of the
ETOPS test.
Issued in Burlington, Massachusetts, on
July 11, 2014.
Kimberly K. Smith,
Acting Manager, Engine and Propeller
Directorate, Aircraft Certification Service.
[FR Doc. 2014–18074 Filed 7–30–14; 8:45 am]
BILLING CODE 4910–13–P
DEPARTMENT OF THE TREASURY
Internal Revenue Service
26 CFR Part 1
[REG–105067–14]
RIN 1545–BM17
Segregation Rule Effective Date
Internal Revenue Service (IRS),
Treasury.
ACTION: Notice of proposed rulemaking
by cross-reference to temporary
regulations.
AGENCY:
In the Rules and Regulations
section of this issue of the Federal
Register, the IRS is issuing temporary
regulations that modify the effective
date provision of recently published
final regulations under Section 382 of
the Internal Revenue Code. The
temporary regulations affect
corporations whose stock is or was
acquired by the Department of the
Treasury (Treasury) pursuant to certain
programs under the Emergency
Economic Stabilization Act of 2008
(EESA). The text of those temporary
regulations published in this issue of
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SUMMARY:
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the Federal Register also serves as the
text of these proposed regulations.
DATES: Written or electronic comments
and requests for a public hearing must
be submitted by October 29, 2014.
ADDRESSES: Send submissions to
CC:PA:LPD:PR (REG–105067–14), Room
5203, Internal Revenue Service, P.O.
Box 7604, Ben Franklin Station,
Washington, DC 20044. Submissions
may be hand-delivered Monday through
Friday between the hours of 8 a.m. and
4 p.m. to CC:PA:LPD:PR (REG–105067–
14), Courier’s Desk, Internal Revenue
Service, 1111 Constitution Avenue NW.,
Washington, DC 20224, or sent
electronically via the Federal
eRulemaking Portal at
www.regulations.gov (IRS REG–105067–
14).
FOR FURTHER INFORMATION CONTACT:
Concerning the proposed regulations,
Stephen R. Cleary, (202) 317–5353;
concerning submission of comments
and requests for a public hearing,
Oluwafumnilayo Taylor, (202) 317–6901
(not toll-free numbers).
SUPPLEMENTARY INFORMATION:
Background and Explanation of
Provisions
Temporary regulations in the Rules
and Regulations section of this issue of
the Federal Register amend 26 CFR Part
1. The temporary regulations modify the
effective date provision for TD 9638 [78
FR 62418], published on October 22,
2013, which provided final regulations
that altered the operation of certain of
the public group segregation rules under
section 382. The temporary regulations
apply to stock acquired by Treasury
pursuant to certain programs under
EESA (Programs). In particular, the
temporary regulations apply to the
subsequent sale by Treasury of that
stock. The text of those regulations also
serves as the text of these proposed
regulations. The preamble to the
temporary regulations explains the
amendments.
Special Analyses
It has been determined that this notice
of proposed rulemaking is not a
significant regulatory action as defined
in Executive Order 12866, as
supplemented by Executive Order
13563. Therefore, a regulatory
assessment is not required. It is hereby
certified that these regulations will not
have a significant economic impact on
a substantial number of small entities.
This certification is based on the fact
that, if the regulations apply to any
small entities, the effect will not be to
increase their tax liability, but to
prevent a potential increase in tax
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liability that might otherwise occur.
Therefore, a Regulatory Flexibility
Analysis under the Regulatory
Flexibility Act (5 U.S.C. chapter 6) is
not required. Pursuant to section 7805(f)
of the Code, these regulations have been
submitted to the Chief Counsel for
Advocacy of the Small Business
Administration for comment on their
impact on small business.
Comments and Requests for a Public
Hearing
Before these proposed regulations are
adopted as final regulations,
consideration will be given to any
written (a signed original and eight (8)
copies) or electronic copies that are
submitted timely to the IRS. The IRS
and the Treasury Department request
comments on the clarity of the proposed
rules and how they can be made easier
to understand. All comments will be
made available for public inspection
and copying at www.regulations.gov or
upon request. A public hearing will be
scheduled if requested in writing by any
person that timely submits written
comments. If a public hearing is
scheduled, notice of the date, time, and
place for the public hearing will be
published in the Federal Register.
Drafting information
The principal author of these
regulations is Stephen R. Cleary, Office
of Associate Chief Counsel (Corporate).
However, other personnel from the IRS
and the Treasury Department
participated in their development.
List of Subjects in 26 CFR Part 1
Income taxes, Reporting and
recordkeeping requirements.
Proposed Amendments to the
Regulations
Accordingly, 26 CFR part 1 is
proposed to be amended as follows:
PART 1—INCOME TAXES
Paragraph 1. The authority citation
for part 1 continues to read in part as
follows:
■
Authority: 26 U.S.C. 7805 * * *
Section 1.382–3 also issued under 26
U.S.C. 382(g)(4)(C) and 26 U.S.C. 382(m).
* * *
Par. 2. Section 1.382–3 is amended by
revising paragraph (j)(17) to read as
follows:
■
§ 1.382–3 Definitions and Rules Relating to
a 5-percent Shareholder.
*
*
*
*
*
(j) * * *
(17) Effective/applicability date. [The
text of the proposed amendment to
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]]>Agencies
[Federal Register Volume 79, Number 147 (Thursday, July 31, 2014)]
[Proposed Rules]
[Pages 44321-44324]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-18074]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 33
[Docket No.FAA-2014-0376; Notice No. 33-14-01-SC]
Special Conditions: SNECMA, Silvercrest-2 SC-2D; Rated 10-Minute
One Engine Inoperative Takeoff Thrust at High Ambient Temperature
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed special conditions.
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SUMMARY: This action proposes special conditions for the SNECMA,
Silvercrest-2 SC-2D engine model. This engine will have a novel or
unusual design feature--an additional takeoff rating that increases the
exhaust gas temperature (EGT) limit to maintain takeoff thrust in
certain high ambient temperature conditions with one engine inoperative
(OEI) for a maximum of 10 minutes. The applicable airworthiness
regulations do not contain adequate or appropriate safety standards for
this design feature. The proposed special conditions contain the
additional safety standards that the Administrator considers necessary
to establish a level of safety equivalent to that established by the
existing airworthiness standards.
DATES: Send your comments on or before September 2, 2014.
ADDRESSES: Send comments identified by docket number [FAA-2014-0376]
using any of the following methods:
Federal eRegulations Portal: Go to https://www.regulations.gov and follow the online instructions for sending your
comments electronically.
Mail: Send comments to Docket Operations, M-30, U.S.
Department of Transportation (DOT), 1200 New Jersey Avenue SE., Room
W12-140, West Building Ground Floor, Washington, DC, 20590-0001.
Hand Delivery of Courier: Take comments to Docket
Operations in Room W12-140 of the West Building Ground Floor at 1200
New Jersey Avenue SE., Washington, DC, between 8 a.m., and 5 p.m.,
Monday through Friday, except Federal holidays.
Fax: Fax comments to Docket Operations at 202-493-2251.
Privacy: Docket Operations will post all comments it receives,
without change, to https://regulations.gov, including any personal
information the commenter provides. Using the search function of the
docket Web site, anyone can find and read the electronic form of all
comments received into any FAA docket, including the name of the
individual sending the comment (or signing the comment for an
association, business, labor union, etc.). DOT's complete Privacy Act
Statement can be found in the Federal Register published on April 11,
2000 (65 FR 19477-19478), as well as at https://DocketsInfo.dot.gov.
Docket: You may read background documents or comments received at
https://www.regulations.gov at any time. Follow the online instructions
for accessing the docket or go to the Docket Operations in Room W12-140
of the West Building Ground Floor at 1200 New Jersey Avenue SE.,
Washington, DC, between 9 a.m., and 5 p.m., Monday through Friday,
except federal holidays.
FOR FURTHER INFORMATION CONTACT: For technical questions concerning
this proposed rule, contact Tara Fitzgerald, ANE-111, Engine and
Propeller Directorate, Aircraft Certification Service, 12 New England
Executive Park, Burlington, Massachusetts, 01803-5213; telephone (781)
238-7130; facsimile (781) 238-7199. For legal questions concerning this
proposed rule, contact Vincent Bennett, ANE-7, Engine and Propeller
Directorate, Aircraft Certification Service, 12 New England Executive
Park, Burlington, Massachusetts, 01803-5299; telephone (781) 238-7044;
facsimile (781) 238-7055; email vincent.bennett@faa.gov.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite interested persons to participate in this rulemaking by
submitting written comments, data, or views. The agency also invites
comments relating to the economic, environmental, energy, or federalism
impacts that might result from adopting the proposals in this document.
The most helpful comments reference a specific portion of the proposal,
explain the reason for any recommended change, and include supporting
data. To ensure the docket does not contain duplicate comments,
commenters should send only one copy of written comments, or if
comments are filed electronically, commenters should submit only one
time.
We will file in the docket all comments it receives, as well as a
report summarizing each substantive public contact with FAA personnel
concerning this proposed rulemaking. Before acting on this proposal, we
will consider comments filed late if it is possible to do so without
incurring expense or delay. We may change these special conditions
based on the comments we receive.
Background
On April 19, 2011, SNECMA applied for a new type certificate (TC)
for the Silvercrest-2 SC-2D engine model. On April 30, 2014, SNECMA
requested an extension to their original TC application, which the FAA
granted through June 30, 2015.
For their Silvercrest-2 SC-2D engine model, SNECMA requests an
additional takeoff rating to maintain takeoff thrust in certain high
ambient temperature conditions with OEI. Therefore, the Silvercrest-2
SC-2D engine model would have two different takeoff ratings. The first
rating corresponds with the rated takeoff thrust of the engine. The
second takeoff rating maintains the takeoff thrust in certain high
ambient temperature conditions for a maximum of 10 minutes. This
additional takeoff rating is named, ``Rated 10-Minute OEI Takeoff
Thrust at High Ambient Temperature'' (Rated 10-minute OEI TOTHAT).
These special conditions are necessary because the applicable
airworthiness regulations do not contain adequate or appropriate safety
standards for the additional takeoff rating.
Type Certification Basis
Under the provisions of Title 14, Code of Federal Regulations (14
CFR) 21.17, SNECMA must show that the Silvercrest-2 SC-2D meets the
applicable provisions of the applicable regulations in effect on the
date of application, except as detailed in paragraphs 21.101(b) and
(c). The FAA has determined the following certification basis for the
Silvercrest-2 SC-2D engine model:
1. 14 CFR part 33, ``Airworthiness Standards Aircraft Engines,''
dated February 1, 1965, with Amendments 33-1 through 33-31, dated July
18, 2011.
If the FAA finds that the regulations in effect on the date of the
application for the change do not provide adequate or appropriate
safety standards for the
[[Page 44322]]
Silvercrest-2 SC-2D because of a novel or unusual design feature,
special conditions are prescribed under the provisions of Sec. 21.16.
Special conditions are initially applicable to the model for which
they are issued. Should the type certificate for that model be amended
later to include any other model that incorporates the same or similar
novel or unusual design feature, the special conditions would also
apply to the other model under Sec. 21.101.
In addition to complying with the applicable product airworthiness
regulations and the requirements of these special conditions, the
Silvercrest-2 SC-2D engine model must also comply with the fuel vent
and exhaust emission requirements of 14 CFR part 34 and the noise
certification requirements of 14 CFR part 36 in accordance with the
``Noise Control Act of 1972.''
The FAA issues special conditions, as defined in 14 CFR 11.19, per
Sec. 11.38, and they become part of the type certification basis under
Sec. 21.17(a)(2).
Novel or Unusual Design Features
The Silvercrest-2 SC-2D engine model will incorporate the following
novel or unusual design feature:
The SNECMA Silvercrest-2 SC-2D engine model will incorporate an
additional takeoff rating to maintain takeoff thrust in certain high
ambient temperature OEI takeoff conditions for a maximum of 10 minutes.
The result will be two different takeoff ratings, one for the rated
takeoff thrust of the engine and the other to maintain the takeoff
thrust in certain high ambient temperature OEI takeoff conditions for a
maximum of 10 minutes. The additional takeoff rating is referred to as
``Rated 10-Minute OEI Takeoff Thrust at High Ambient Temperature''
(Rated 10-minute OEI TOTHAT).
The Rated 10-minute OEI TOTHAT is a novel and unusual design
feature that requires additional airworthiness standards for type
certification of the SNECMA Silvercrest-2 SC-2D engine model.
Discussion
These proposed special conditions are necessary because current
part 33 regulations do not contain airworthiness standards for airplane
applications of OEI ratings. For an airplane application, the OEI
rating is the same as the rated thrust of the engine. All OEI ratings
in current part 33 regulations are only applicable to rotorcraft
applications.
These proposed special conditions were modeled based on the
rotorcraft requirements for the 30-second and 2-minute OEI ratings, and
modified to represent the airplane application. The Rated 10-minute OEI
TOTHAT is similar to the 30-second and 2-minute OEI ratings available
in part 33 for rotorcraft engines. The Rated 10-minute OEI TOTHAT
shares common features, such as the need to notify the pilot and
maintenance personnel about the rating's use, provides data needed for
power assurance check, and continued validation of the related
maintenance procedures.
The Rated 10-minute OEI TOTHAT is for use during OEI events that
occur during takeoff in high ambient temperature conditions, up to 5
degrees Celsius hotter than the rated takeoff thrust corner point.
Under these unique conditions (extreme hot day and OEI), the Rated 10-
minute OEI TOTHAT leads to an increase in EGT to maintain the takeoff
thrust of the engine. These proposed special conditions contain
additional mandatory post-flight inspection and maintenance action
requirements associated with any use of the Rated 10-minute OEI TOTHAT.
These requirements add a rating definition in part 1.1 and mandates
mandatory inspections in the ICA; instructions for installing and
operating the engine; engine rating and operating limitations;
instrument connection; and endurance testing.
The current requirements of the endurance test under Sec. 33.87
represent a typical airplane flight profile and the severity of the
takeoff rating. Therefore, the endurance test under Sec. 33.87 covers
normal all-engines-operating takeoff conditions for which the engine
control system limits the engine to the takeoff thrust rating. The
proposed special conditions for the endurance testing requirements are
intended to represent the airplane flight profile when an OEI event
occurs during takeoff under specified ambient temperatures, and until
the mandatory inspection and maintenance actions can be performed.
These proposed special conditions require endurance testing that is not
less than 135 minutes in duration and demonstrates the engine is
capable of the additional Rated 10-minute OEI TOTHAT rating at the
higher EGT limit following completion of the tests required by Sec.
33.87(b), without disassembly or modification.
The associated engine deterioration after use of the Rated 10-
minute OEI TOTHAT is not known without the intervening mandatory
inspections in these special conditions. The mandatory inspections
ensure the engine will continue to comply with its certification basis
after any use of the Rated 10-minute OEI TOTHAT. The applicant is
expected to assess the deterioration from use of the Rated 10-minute
OEI TOTHAT. The Airworthiness Limitations section must prescribe the
mandatory post-flight inspections and maintenance actions associated
with any use of the Rated 10-minute OEI TOTHAT.
These requirements maintain a level of safety equivalent to the
level intended by the applicable airworthiness standards in effect on
the date of application.
Applicability
As discussed above, these special conditions are applicable to the
Silvercrest-2 SC-2D engine model. Should SNECMA apply at a later date
for a change to the type certificate to include another engine model
incorporating the same novel or unusual design feature, these special
conditions would apply to that model as well.
Conclusion
This action affects only the Rated 10-minute OEI TOTHAT features on
the Silvercrest-2 SC-2D engine model. It is not a rule of general
applicability and applies only to SNECMA, who requested FAA approval of
this engine feature.
List of Subjects in 14 CFR Part 33
Air Transportation, Aircraft, Aviation, Aviation safety, Safety.
The authority citation for these special conditions is as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701, 44702, 44704.
The Proposed Special Conditions
Accordingly, the FAA proposes the following special conditions as
part of the type certification basis for the SNECMA Silvercrest-2 SC-2D
engine model.
1. Part 1.1 Definitions.
``Rated 10-Minute One Engine Inoperative Take-off Thrust at High
Ambient Temperature'' (Rated 10-minute OEI TOTHAT) means the approved
engine thrust developed under specified altitudes and temperatures
within the operating limitations established for the engine, and for
continuation of flight operation after failure or shutdown of one
engine in a multi-engine airplane during takeoff operation. Use is
limited to two periods, no longer than 10 minutes each in any one
flight, and followed by mandatory inspection and maintenance actions.
2. Part 33 Requirements.
In addition to the airworthiness standards in 14 CFR part 33,
effective
[[Page 44323]]
February 1, 1965, Amendments 33-1 through 33-31 applicable to the
engine and the Rated 10-minute OEI TOTHAT, the following special
conditions apply:
Sec. 33.4 Instructions for Continued Airworthiness.
(a) The Airworthiness Limitations section must prescribe the
mandatory post-flight inspections and maintenance actions associated
with any use of the Rated 10-minute OEI TOTHAT.
(b) The applicant must validate the adequacy of the inspections and
maintenance actions required under paragraph Sec. 33.4(a) of these
special conditions.
(c) The applicant must establish an in-service engine evaluation
program to ensure the continued adequacy of the instructions for
mandatory post-flight inspections and maintenance actions prescribed
under paragraph Sec. 33.4(a) of these special conditions, and of the
data for thrust assurance procedures required by Sec. 33.5(b)(1) of
these special conditions. The program must include service engine tests
or equivalent service engine test experience on engines of similar
design and evaluations of service use of the Rated 10-minute OEI
TOTHAT.
Sec. 33.5 Instruction manual for installing and operating the engine.
(a) Installation Instructions:
(1) The applicant must identify the means, or provisions for means,
provided in compliance with the requirements of Sec. 33.29 of these
special conditions.
(2) The applicant must specify that the engine thrust control
system automatically resets the thrust on the operating engine to the
Rated 10-minute OEI TOTHAT level when one engine fails during takeoff
at specified altitudes and temperatures, and that the Rated 10-minute
OEI TOTHAT is not available when all engines are operational.
(b) Operating Instructions:
(1) The applicant must provide data on engine performance
characteristics and variability to enable the airplane manufacturer to
establish airplane thrust assurance procedures.
Sec. 33.7 Engine ratings and operating limitations.
(a) The Rated 10-minute OEI TOTHAT and the associated operating
limitations are established as follows:
(1) The thrust is the same as the engine takeoff rated thrust with
extended flat rating corner point,
(2) The rotational speed limits are the same as those associated
with the engine takeoff rated thrust,
(3) The applicant must establish a gas temperature steady-state
limit and, if necessary, a transient gas overtemperature limit for
which the time duration is no longer than 30 seconds, and
(4) The use is limited to two periods of no longer than 10 minutes
each in any one flight, and followed by mandatory inspection and
maintenance actions prescribed by Sec. 33.4(a) of these special
conditions.
(b) The applicant must propose language to include in the type
certificate data sheet specified in Sec. 21.41 for the following:
(1) The Rated 10-minute OEI TOTHAT and associated limitations.
(2) As required by Sec. 33.5(b), Operating instructions, include a
note stating that ``Rated 10-Minute One Engine Inoperative Take-off
Thrust at High Ambient Temperature'' (Rated 10-minute OEI TOTHAT) means
the approved engine thrust developed under specified altitudes and
temperatures within the operating limitations established for the
engine, and for continuation of flight operation after failure or
shutdown of one engine in multi-engine airplane during takeoff
operation. Use is limited to two periods, no longer than 10 minutes
each in any one flight, and followed by mandatory inspection and
maintenance actions.
(3) As required by Sec. 33.5(b), Operating instructions, include a
note stating that the engine thrust control system automatically resets
the thrust on the operating engine to the Rated 10-minute OEI TOTHAT
level when one engine fails during takeoff at specified altitudes and
temperatures, and that the Rated 10-minute OEI TOTHAT is not available
when all engines are operational.
Sec. 33.28 Engine control systems.
(a) The engine must incorporate a means, or a provision for a
means, for automatic availability and automatic control of the Rated
10-minute OEI TOTHAT.
(b) The engine controls managing the OEI takeoff thrust for all
ambient conditions must assure that:
(1) The approved rated takeoff thrust is available to the pilot at
all times by throttle selection, and
(2) The Rated 10-minute OEI TOTHAT is only available in an OEI
condition at specified altitudes and temperatures.
Sec. 33.29 Instrument connection.
(a) The engine must:
(1) Have means or provisions for means, to alert the pilot when the
Rated 10-minute OEI TOTHAT is in use, when the event begins, and when
the time interval expires.
(2) Have means, or provision for means, which cannot be reset in
flight, to:
(i) Automatically record each use and duration of the Rated 10-
minute OEI TOTHAT, and
(ii) Alert maintenance personnel that the engine has been operated
at the Rated 10-minute OEI TOTHAT, and permit retrieval of recorded
data.
(iii) Have means, or provision for means, to enable routine
verification of the proper operation of the means in Sec. Sec.
33.29(1) and (2) of these special conditions.
Sec. 33.85(b) Calibration tests.
The applicant must base the calibration test on the thrust check at
the end of the endurance test required by Sec. 33.87 of these special
conditions.
Sec. 33.87 Endurance test.
(a) Following completion of the tests required by Sec. 33.87(b),
and without intervening disassembly, except as needed to replace those
parts described as consumables in the ICA, the applicant must conduct
the following test sequence for a total time of not less than 135
minutes:
(1) Ten minutes at Rated 10-minute OEI TOTHAT,
(2) Sixty-five minutes at maximum continuous thrust,
(3) One minute at 50 percent of takeoff thrust,
(4) Ten minutes at Rated 10-minute OEI TOTHAT,
(5) One minute at flight idle,
(6) Ten minutes at Rated 10-minute OEI TOTHAT,
(7) Five minutes at maximum continuous thrust,
(8) One minute at 50 percent of takeoff thrust,
(9) Five minutes at Rated 10-minute OEI TOTHAT,
(10) One minute at flight idle,
(11) Ten minutes at Rated 10-minute OEI TOTHAT,
(12) Five minutes at maximum continuous thrust,
(13) One minute at 50 percent of takeoff thrust,
(14) Nine minutes at Rated 10-minute OEI TOTHAT, and
(15) One minute at flight idle
(b) The test sequence of Sec. Sec. 33.87(a)(1) through (a)(15) of
these special conditions must be run continuously. If a stop occurs
during these tests, the interrupted sequence must be repeated unless
the applicant shows that the severity of the test would not be reduced
if the current tests were continued.
(c) Where the engine characteristics are such that acceleration to
the Rated
[[Page 44324]]
10-minute OEI TOTHAT results in a transient overtemperature in excess
of the steady-state temperature limit identified in Sec. 33.7(a)(3) of
these special conditions, the transient gas overtemperature must be
applied to each acceleration to the Rated 10-minute OEI TOTHAT of the
test sequence in Sec. 33.87(a) of these special conditions.
Sec. 33.93 Teardown inspection.
The applicant must perform the teardown inspection required by
Sec. 33.93(a) after completing the endurance test prescribed by Sec.
33.87 of these special conditions.
Sec. 33.201 Design and test requirements for Early ETOPS eligibility.
In addition to the requirements of Sec. 33.201(c)(1), the
simulated ETOPS mission cyclic endurance test must include two cycles
of 10 minute duration, each at the Rated 10-minute OEI TOTHAT; one
before the last diversion cycle and one at the end of the ETOPS test.
Issued in Burlington, Massachusetts, on July 11, 2014.
Kimberly K. Smith,
Acting Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2014-18074 Filed 7-30-14; 8:45 am]
BILLING CODE 4910-13-P
