Special Conditions: SNECMA, Silvercrest-2 SC-2D; Rated 10-Minute One Engine Inoperative Takeoff Thrust at High Ambient Temperature, 64666-64669 [2014-25884]
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Federal Register / Vol. 79, No. 211 / Friday, October 31, 2014 / Rules and Regulations
Non-Objection Letter, with such action
being effective only on a prospective
basis.
(b) Requests. A regulated entity or the
Office of Finance may request a NonObjection Letter in accordance with
§ 1211.6.
§ 1211.5
Regulatory Interpretations.
(a) Authority. The General Counsel
may, in his or her discretion, issue a
Regulatory Interpretation to a regulated
entity or the Office of Finance,
providing guidance with respect to the
application of any applicable statute,
rule, regulation, or order to a proposed
transaction or activity. The Director
reserves the right to modify, rescind, or
supersede a Regulatory Interpretation,
with such action being effective only on
a prospective basis.
(b) Requests. A regulated entity or the
Office of Finance may request a
Regulatory Interpretation in accordance
with § 1211.6.
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§ 1211.6
Submission requirements.
Applications for a Waiver or Approval
and requests for a Non-Objection Letter
or Regulatory Interpretation shall
comply with the requirements of this
section and shall pertain to regulatory
matters relating to the Banks or
Enterprises, and not to conservatorship
matters.
(a) Filing. Each application or request
shall be in writing. A Bank or the Office
of Finance shall submit its filing to the
Deputy Director for the Division of
Federal Home Loan Bank Regulation,
and an Enterprise shall submit its filing
to the Deputy Director for Enterprise
Regulation. Applications for regulatory
interpretations shall be submitted also
to the General Counsel.
(b) Authorization. An application for
a Waiver or Approval and a request for
a Non-Objection Letter or Regulatory
Interpretation shall be signed by the
principal executive officer or other
authorized executive officer of the
regulated entity or by the chairperson of
the board of directors or authorized
executive officer of the Office of
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(c) Information requirements. Each
application or request shall contain:
(1) The name of the requester, and the
name, title, business address, telephone
number, and business electronic mail
address, if any, of the official filing the
application or request on its behalf;
(2) The name, business address,
telephone number, and business
electronic mail address, if any, of a
contact person from whom FHFA staff
may seek additional information if
necessary;
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(3) The section numbers of the
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or request are accurate and complete.
The following form of certification is
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the submission are true and complete to
the best of my knowledge. [Name and
Title].’’
(d) Exceptions. In any given matter or
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the application or request.
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Dated: October 27, 2014.
Melvin L. Watt,
Director, Federal Housing Finance Agency.
[FR Doc. 2014–25973 Filed 10–30–14; 8:45 am]
BILLING CODE 8070–01–P
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 33
[Docket No. FAA–2014–0376; Notice No. 33–
014–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: Final special conditions.
AGENCY:
These final special conditions
are issued 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.
These final 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: The effective date of these
special conditions is December 1, 2014.
FOR FURTHER INFORMATION CONTACT: For
technical questions concerning this 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; email tara.fitzgerald@faa.gov. For
legal questions concerning this 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:
SUMMARY:
Background
On April 19, 2011, SNECMA applied
for a new type certificate (TC) for the
Silvercrest-2 SC–2D engine model. For
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their Silvercrest-2 SC–2D engine model,
SNECMA requested an additional
takeoff rating to maintain takeoff thrust
in certain high ambient temperature
conditions with OEI. Therefore, the
Silvercrest-2 SC–2D engine model will
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 when one engine is
inoperative. This additional takeoff
rating is named, ‘‘Rated 10-Minute OEI
Takeoff Thrust at High Ambient
Temperature’’ (Rated 10-minute OEI
TOTHAT).
These final 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 final special conditions were
modeled based on the rotorcraft
requirements for the 30-second and 2minute OEI ratings, and modified to
represent the airplane application. 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 final
special conditions contain additional
mandatory post-flight inspection and
maintenance action requirements
associated with any use of the Rated 10minute OEI TOTHAT. These
requirements add a rating definition in
part 1.1; 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
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thrust rating. These final 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 final 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
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 special conditions are
necessary because the applicable
airworthiness regulations do not contain
adequate or appropriate safety standards
for the additional takeoff rating, and
their requirements maintain a level of
safety equivalent to the level intended
by the applicable airworthiness
standards in effect on the date of
application.
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
Silvercrest-2 SC–2D because of a novel
or unusual design feature, special
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64667
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, these 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 venting and
exhaust emission requirements of 14
CFR part 34.
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).
Novel or Unusual Design Features
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 of Comments
A notice of proposed special
conditions, No. 33–14–01–SC, for the
Silvercrest-2 SC–2D engine model was
published in the Federal Register on
July 31, 2014 (79 FR 44321). We did not
receive any public comments. We did,
however, modify the proposed special
conditions by removing requirement (b)
under ‘‘§ 33.28, Engine control
systems.’’ These requirements are
addressed at the aircraft level.
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
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design feature, these special conditions
would apply to that model as well.
Conclusion
We reviewed the available data and
determined that air safety and the
public interest require adopting these
special conditions. 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 Special Conditions
Accordingly, pursuant to the authority
delegated to me by the Administrator,
the following special conditions are
issued 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 Takeoff 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
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:
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§ 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.
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(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.
§ 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 § 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.
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(2) As required by § 33.5(b), Operating
instructions, include a note stating that
‘‘Rated 10-Minute One Engine
Inoperative Takeoff 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.
(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.
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.
§ 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
§ 33.29(a)(1) and (a)(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
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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 rated
maximum continuous thrust,
(3) One minute at 50 percent of rated
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 rated maximum
continuous thrust,
(8) One minute at 50 percent of rated
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 rated maximum
continuous thrust,
(13) One minute at 50 percent of rated
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
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.
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§ 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.
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Issued in Burlington, Massachusetts, on
October 23, 2014.
Colleen M. D’Alessandro,
Assistant Manager, Engine and Propeller
Directorate, Aircraft Certification Service.
64669
I. Background
those recordings1. The Judges set rates
and terms for use of the rights during
the period 2006 through 2010,
publishing their Final Determination on
May 1, 2007. 72 FR 24084 (May 1, 2007)
(Web II).
Intercollegiate Broadcasting System,
Inc. (IBS) appealed the Judges’
determination to the U.S. Court of
Appeals for the DC Circuit. The DC
Circuit remanded the Judges’
determination of the minimum fee
established for noncommercial
webcasters, viz. $500 per year per
station or channel, citing insufficient
evidence in the record to substantiate
the $500 minimum fee. On May 18,
2010, after granting the parties leave to
engage in additional briefing and
discovery, the Judges held a further
hearing on remand. Following the
remand hearing, the Judges issued their
determination on September 17, 2010.
75 FR 56873 (Sept. 17, 2010).
IBS again appealed the Judges’
determination. During the pendency of
the Web II appeal, the Judges issued a
final determination regarding rates and
terms for the same licenses for the
period 2011 through 2015.2 (Web III).
IBS appealed the Judges’ Web III
determination challenging again the
$500 minimum fee and asserting that
appointment of the Judges violated the
Appointments Clause of the U.S.
Constitution. Given the overlap of issues
and the introduction of a constitutional
challenge, the DC Circuit stayed further
proceedings on appeal in Web II.
The DC Circuit decided Web III and
concluded that the Judges’
appointments were unconstitutional.
The DC Circuit struck portions of the
Copyright Act that it determined to be
unconstitutional and the Librarian of
Congress appointed a panel of Judges
consistent with the altered statute. The
DC Circuit remanded Web III for further
proceedings 3 by a constitutionally valid
panel of Judges. After the Web III
remand, on motion of the Web II parties,
the DC Circuit vacated and remanded
the Web II matter.4
The issue before the Judges is
determination of the validity and
The captioned matter began with a
notice in the Federal Register in
February 2005. In that notice, the
Copyright Royalty Judges (Judges)
commenced a rate-setting proceeding
and solicited Petitions to Participate.
See 70 FR 7970 (February 16, 2005). The
aim of the proceeding was to establish
royalty rates and terms, including the
establishment of minimum fees,
applicable to entities making ephemeral
recordings of copyrighted sound
recordings and digitally performing
1 Owners of rights in sound recordings are subject
to compulsory licenses under the Copyright Act.
See, e.g., 17 U.S.C. 112(e) (ephemeral recordings),
114 (d)(2), (3) (transmission). The Judges are tasked
to adjudicate, inter alia, disputes relating to
licensing fees. See, e.g., 17 U.S.C. 112(e)(3), (4),
114(f), 801, 803, 804.
2 See 76 FR 13026 (Mar. 9, 2011) (Web III).
3 Intercollegiate Broadcasting Sys., Inc. v.
Copyright Royalty Board, 684 F.3d 1332, 1342 (D.C.
Cir. 2012), cert. denied, 133 S. Ct. 2735 (2013).
4 Intercollegiate Broadcasting Sys., Inc. v.
Copyright Royalty Board, No. 10–1314 (D.C. Cir.
Sept. 30, 2013) (order granting joint motion for
vacatur and remand).
[FR Doc. 2014–25884 Filed 10–30–14; 8:45 am]
BILLING CODE 4910–13–P
LIBRARY OF CONGRESS
Copyright Royalty Board
37 CFR Part 380
[2005–1 CRB DTRA (Webcasting II)]
Digital Performance Right in Sound
Recordings and Ephemeral
Recordings
Copyright Royalty Board,
Library of Congress.
ACTION: Final Determination after
Second Remand.
AGENCY:
The Copyright Royalty Judges
are announcing their final
determination upholding the validity
and application of the $500 minimum
fee for noncommercial webcasters for
the licensing period 2006 through 2010.
The judges issued the determination in
response to a second order of remand by
the United States Court of Appeals for
the District of Columbia Circuit. Their
review of the evidence was de novo. The
judges issued their initial determination
in March 2014 and received no motions
for rehearing.
DATES: Effective date: October 31, 2014.
Applicability date: The fee applies to
the license period January 1, 2006,
through December 31, 2010.
ADDRESSES: The determination is also
published on the agency’s Web site at
www.loc.gov/crb. For related matters see
also the Federal eRulemaking Portal at
www.regulations.gov.
FOR FURTHER INFORMATION CONTACT:
Richard Strasser, Senior Attorney, or
Kim Whittle, Attorney Advisor, (202)
707–7658 or crb@loc.gov.
SUPPLEMENTARY INFORMATION:
SUMMARY:
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]]>Agencies
[Federal Register Volume 79, Number 211 (Friday, October 31, 2014)]
[Rules and Regulations]
[Pages 64666-64669]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-25884]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 33
[Docket No. FAA-2014-0376; Notice No. 33-014-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: Final special conditions.
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SUMMARY: These final special conditions are issued 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. These final 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: The effective date of these special conditions is December 1,
2014.
FOR FURTHER INFORMATION CONTACT: For technical questions concerning
this 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; email tara.fitzgerald@faa.gov. For legal
questions concerning this 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:
Background
On April 19, 2011, SNECMA applied for a new type certificate (TC)
for the Silvercrest-2 SC-2D engine model. For
[[Page 64667]]
their Silvercrest-2 SC-2D engine model, SNECMA requested an additional
takeoff rating to maintain takeoff thrust in certain high ambient
temperature conditions with OEI. Therefore, the Silvercrest-2 SC-2D
engine model will 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 when one engine is
inoperative. This additional takeoff rating is named, ``Rated 10-Minute
OEI Takeoff Thrust at High Ambient Temperature'' (Rated 10-minute OEI
TOTHAT).
These final 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 final 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 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 final 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; 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. These
final 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 final 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 special conditions are necessary because the applicable
airworthiness regulations do not contain adequate or appropriate safety
standards for the additional takeoff rating, and their requirements
maintain a level of safety equivalent to the level intended by the
applicable airworthiness standards in effect on the date of
application.
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 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, these 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 venting
and exhaust emission requirements of 14 CFR part 34.
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 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 of Comments
A notice of proposed special conditions, No. 33-14-01-SC, for the
Silvercrest-2 SC-2D engine model was published in the Federal Register
on July 31, 2014 (79 FR 44321). We did not receive any public comments.
We did, however, modify the proposed special conditions by removing
requirement (b) under ``Sec. 33.28, Engine control systems.'' These
requirements are addressed at the aircraft level.
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
[[Page 64668]]
design feature, these special conditions would apply to that model as
well.
Conclusion
We reviewed the available data and determined that air safety and
the public interest require adopting these special conditions. 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 Special Conditions
0
Accordingly, pursuant to the authority delegated to me by the
Administrator, the following special conditions are issued 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 Takeoff 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 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 Takeoff
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.
(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.
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.
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. 33.29(a)(1)
and (a)(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
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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 rated maximum continuous thrust,
(3) One minute at 50 percent of rated 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 rated maximum continuous thrust,
(8) One minute at 50 percent of rated 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 rated maximum continuous thrust,
(13) One minute at 50 percent of rated takeoff thrust,
(14) Nine minutes at Rated 10-minute OEI TOTHAT, and
(15) One minute at flight idle
(b) The test sequence of 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 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 October 23, 2014.
Colleen M. D'Alessandro,
Assistant Manager, Engine and Propeller Directorate, Aircraft
Certification Service.
[FR Doc. 2014-25884 Filed 10-30-14; 8:45 am]
BILLING CODE 4910-13-P
