81 FR 6753 - Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration

Federal Register Volume 81, Issue 26 (February 9, 2016)

Page Range		6753-6755
FR Document		2016-02477

We are adopting a new airworthiness directive (AD) for all Turbomeca S.A. ARRIEL 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines with modification TU34 or TU34A installed. This AD requires inspecting the torque conformation box (TCB) for correct resistance values and removing TCBs that fail inspection before further flight. This AD was prompted by TCB failures. We are issuing this AD to prevent failure of the TCB, loss of engine thrust control, and damage to the helicopter.

Federal Register, Volume 81 Issue 26 (Tuesday, February 9, 2016)

[Federal Register Volume 81, Number 26 (Tuesday, February 9, 2016)]
[Rules and Regulations]
[Pages 6753-6755]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2016-02477]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-3805; Directorate Identifier 2015-NE-28-AD; 
Amendment 39-18389; AD 2016-03-02]
RIN 2120-AA64


Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: We are adopting a new airworthiness directive (AD) for all 
Turbomeca S.A. ARRIEL 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines 
with modification TU34 or TU34A installed. This AD requires inspecting 
the torque conformation box (TCB) for correct resistance values and 
removing TCBs that fail inspection before further flight. This AD was 
prompted by TCB failures. We are issuing this AD to prevent failure of 
the TCB, loss of engine thrust control, and damage to the helicopter.

DATES: This AD becomes effective March 15, 2016.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of March 15, 
2016.

ADDRESSES: For service information identified in this AD, contact 
Turbomeca S.A., 40220 Tarnos, France; phone: 33 (0)5 59 74 40 00; fax: 
33 (0)5 59 74 45 15. You may view this service information at the FAA, 
Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA. 
For information on the availability of this material at the FAA, call 
781-238-7125. It is also available on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-
3805.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-
3805, or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday,

[[Page 6754]]

except Federal holidays. The AD docket contains this AD, the mandatory 
continuing airworthiness information (MCAI), the regulatory evaluation, 
any comments received, and other information. The address for the 
Docket Office (phone: 800-647-5527) is Document Management Facility, 
U.S. Department of Transportation, Docket Operations, M-30, West 
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE., 
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Brian Kierstead, Aerospace Engineer, 
Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 
District Avenue, Burlington, MA 01803; phone: 781-238-7772; fax: 781-
238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 by adding an AD that would apply to the specified products. The 
NPRM was published in the Federal Register on November 5, 2015 (80 FR 
68475). The NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    Several cases of torque conformation box (TCB) failures have 
been reported on engines incorporating mod TU34 or mod TU34A. 
Investigation concluded that these failures were caused by cracks on 
soldered joints of TCB resistors.
    This condition, if not corrected, could lead to limited power 
availability in a One Engine Inoperative (OEI) case, possibly 
resulting in reduced control of the helicopter.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We received no comments on the NPRM (80 FR 68475, November 5, 
2015).

Conclusion

    We reviewed the available data and determined that air safety and 
the public interest require adopting this AD as proposed.

Related Service Information Under 1 CFR Part 51

    Turbomeca S.A. has issued Mandatory Service Bulletin (MSB) No. 292 
72 2860, Version A, dated July 15, 2015. The MSB describes procedures 
for checking TCB resistance values. This service information is 
reasonably available because the interested parties have access to it 
through their normal course of business or by the means identified in 
the ADDRESSES section of this final rule.

Costs of Compliance

    We estimate that this AD affects 300 engines installed on 
helicopters of U.S. registry. We estimate that it would take about 1 
hour to perform an inspection. We also estimate that 20% of these 
engines would fail the inspection and require TCB removal, which would 
take about 1 hour. The average labor rate is $85 per hour. Based on 
these figures, we estimate the cost of this AD on U.S. operators to be 
$30,600.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this AD will not have federalism implications 
under Executive Order 13132. This AD will not have a substantial direct 
effect on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government.
    For the reasons discussed above, I certify this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska to the extent 
that it justifies making a regulatory distinction, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive (AD):

2016-03-02 Turbomeca S.A.: Amendment 39-18389; Docket No. FAA-2015-
3805; Directorate Identifier 2015-NE-28-AD.

(a) Effective Date

    This AD becomes effective March 15, 2016.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Turbomeca S.A. ARRIEL 2C, 2C1, 2C2, 2S1, and 
2S2 turboshaft engines with modification TU34 or TU34A installed.

(d) Reason

    This AD was prompted by torque conformation box (TCB) failures. 
We are issuing this AD to prevent failure of the TCB, loss of engine 
thrust control, and damage to the helicopter.

(e) Actions and Compliance

    Comply with this AD within the compliance times specified, 
unless already done.
    (1) Within 600 engine flight hours (EFHs) or 6 months after the 
effective date of this AD, whichever occurs first, check the 
resistance values on the TCB. Use Accomplishment Instructions, 
paragraph 2.3.2 of Turbomeca S.A. Mandatory Service Bulletin 292 72 
2860, Version A, dated July 15, 2015, to do the inspection. Repeat 
this inspection every 600 EFHs since last inspection.
    (2) Remove before further flight any TCB that fails the 
inspection required by paragraph (e)(1) of this AD.

(f) Alternative Methods of Compliance (AMOCs)

    The Manager, Engine Certification Office, FAA, may approve AMOCs 
for this AD. Use the procedures found in 14 CFR 39.19 to make your 
request. You may email your request to: [email protected].

(g) Related Information

    (1) For more information about this AD, contact Brian Kierstead, 
Aerospace Engineer, Engine Certification Office, FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; 
phone: 781-238-7772; fax: 781-238-7199; email: 
[email protected].

[[Page 6755]]

    (2) Refer to MCAI European Aviation Safety Agency AD 2015-0177, 
dated August 25, 2015, for more information. You may examine the 
MCAI in the AD docket on the Internet at http://www.regulations.gov 
by searching for and locating Docket No. FAA-2015-3805.

(h) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Turbomeca S.A. Mandatory Service Bulletin No. 292 72 2860, 
Version A, dated July 15, 2015.
    (ii) Reserved.
    (3) For Turbomeca S.A. service information identified in this 
AD, contact Turbomeca S.A., 40220 Tarnos, France; phone: 33 (0)5 59 
74 40 00; fax: 33 (0)5 59 74 45 15.
    (4) You may view this service information at FAA, Engine & 
Propeller Directorate, 1200 District Avenue, Burlington, MA. For 
information on the availability of this material at the FAA, call 
781-238-7125.
    (5) You may view this service information at the National 
Archives and Records Administration (NARA). For information on the 
availability of this material at NARA, call 202-741-6030, or go to: 
http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Burlington, Massachusetts, on February 2, 2016.
Colleen M. D'Alessandro,
Manager, Engine & Propeller Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-02477 Filed 2-8-16; 8:45 am]
 BILLING CODE 4910-13-P

Federal Register / Vol. 81, No. 26 / Tuesday, February 9, 2016 / Rules and Regulations 6753

List of Subjects in 14 CFR Part 39 (2) Replace each hoist damper unit with a Issued in Fort Worth, Texas, on January 29,
unit that has been repaired as required by 2016.
Air transportation, Aircraft, Aviation paragraph (f)(1) of this AD; or Lance T. Gant,
safety, Incorporation by reference, (3) Deactivate the rescue hoist system.
Safety. Manager, Rotorcraft Directorate, Aircraft
(g) Alternative Methods of Compliance Certification Service.
Adoption of the Amendment (AMOCs) [FR Doc. 2016–02233 Filed 2–8–16; 8:45 am]
Accordingly, under the authority (1) The Manager, Safety Management BILLING CODE 4910–13–P
delegated to me by the Administrator, Group, FAA, may approve AMOCs for this
the FAA amends 14 CFR part 39 as AD. Send your proposal to: David N.
follows: Hatfield, Aviation Safety Engineer, Safety DEPARTMENT OF TRANSPORTATION
Management Group, Rotorcraft Directorate,
PART 39—AIRWORTHINESS FAA, 10101 Hillwood Pkwy, Fort Worth, TX Federal Aviation Administration
DIRECTIVES 76177; telephone (817) 222–5110; email 9-
ASW-FTW-AMOC-Requests@faa.gov. 14 CFR Part 39
■ 1. The authority citation for part 39 (2) For operations conducted under a 14
continues to read as follows: CFR part 119 operating certificate or under [Docket No. FAA–2015–3805; Directorate
14 CFR part 91, subpart K, we suggest that Identifier 2015–NE–28–AD; Amendment 39–
Authority: 49 U.S.C. 106(g), 40113, 44701. you notify your principal inspector, or 18389; AD 2016–03–02]
§ 39.13 [Amended] lacking a principal inspector, the manager of RIN 2120–AA64
the local flight standards district office or
■ 2. The FAA amends § 39.13 by certificate holding district office, before Airworthiness Directives; Turbomeca
removing Airworthiness Directive (AD) operating any aircraft complying with this S.A. Turboshaft Engines
2014–13–01, Amendment 39–17875 (79 AD through an AMOC.
FR 36635, June 30, 2014), and adding AGENCY: Federal Aviation
(h) Additional Information
the following new AD: Administration (FAA), DOT.
The subject of this AD is addressed in
2016–03–05 Airbus Helicopters European Aviation Safety Agency (EASA) AD ACTION: Final rule.
Deutschland GmbH: Amendment 39– No. 2015–0019R1, dated February 13, 2015.
18392; Docket No. FAA–2016–2843; You may view the EASA AD on the Internet
SUMMARY: We are adopting a new
Directorate Identifier 2015–SW–003–AD. airworthiness directive (AD) for all
at http://www.regulations.gov by searching
(a) Applicability for and locating it in Docket No. FAA–2016– Turbomeca S.A. ARRIEL 2C, 2C1, 2C2,
2843. 2S1, and 2S2 turboshaft engines with
This AD applies to Model MBB–BK 117 C–
2 and MBB–BK 117 D–2 helicopters with a modification TU34 or TU34A installed.
(i) Subject
Goodrich hoist damper unit, part number (P/ This AD requires inspecting the torque
N) 44307–480, 44307–480–1, or 44307–480– Joint Aircraft Service Component (JASC) conformation box (TCB) for correct
2 installed, certificated in any category. Code: 2500, Cabin Equipment/Furnishings. resistance values and removing TCBs
(b) Unsafe Condition (j) Material Incorporated by Reference that fail inspection before further flight.
(1) The Director of the Federal Register This AD was prompted by TCB failures.
This AD defines the unsafe condition as We are issuing this AD to prevent
uncommanded detachment of the external approved the incorporation by reference of
hoist damper unit, which could result in loss the service information listed in this failure of the TCB, loss of engine thrust
of an external load or person from the paragraph under 5 U.S.C. 552(a) and 1 CFR control, and damage to the helicopter.
helicopter hoist, resulting in injury to part 51. DATES: This AD becomes effective
persons being lifted by the hoist. (2) You must use this service information March 15, 2016.
as applicable to do the actions required by The Director of the Federal Register
(c) Affected ADs this AD, unless the AD specifies otherwise.
This AD supersedes AD 2014–13–01,
approved the incorporation by reference
(i) Airbus Helicopters Emergency Alert
Amendment 39–17875 (79 FR 36635, June Service Bulletin (ASB) No. ASB MBB–BK117
of a certain publication listed in this AD
30, 2014). C–2–85A–041, Revision 4, dated February 12, as of March 15, 2016.
2015. ADDRESSES: For service information
(d) Effective Date
(ii) Airbus Helicopters Emergency ASB No. identified in this AD, contact
This AD becomes effective February 24, ASB MBB–BK117 D–2–85A–002, Revision 1, Turbomeca S.A., 40220 Tarnos, France;
2016. dated February 12, 2015. phone: 33 (0)5 59 74 40 00; fax: 33 (0)5
(e) Compliance (3) For Airbus Helicopters service 59 74 45 15. You may view this service
information identified in this final rule,
You are responsible for performing each information at the FAA, Engine &
contact Airbus Helicopters, 2701 N. Forum
action required by this AD within the
Drive, Grand Prairie, TX 75052; telephone
Propeller Directorate, 1200 District
specified compliance time unless it has Avenue, Burlington, MA. For
(972) 641–0000 or (800) 232–0323; fax (972)
already been accomplished prior to that time. information on the availability of this
641–3775; or at http://www.airbus
(f) Required Actions helicopters.com/techpub. material at the FAA, call 781–238–7125.
Before the next hoist operation, comply (4) You may view this service information It is also available on the Internet at
with paragraph (f)(1), (f)(2), or (f)(3) of this at FAA, Office of the Regional Counsel, http://www.regulations.gov by searching
AD: Southwest Region, 10101 Hillwood Pkwy, for and locating Docket No. FAA–2015–
(1) Replace the split retainers and re- Room 6N–321, Fort Worth, TX 76177. For 3805.
identify each hoist damper unit in information on the availability of this
accordance with the Accomplishment material at the FAA, call (817) 222–5110. Examining the AD Docket
mstockstill on DSK4VPTVN1PROD with RULES

Instructions, paragraph 3.B.1, of Airbus (5) You may view this service information You may examine the AD docket on
Helicopters Emergency Alert Service Bulletin that is incorporated by reference at the
National Archives and Records
the Internet at http://
(ASB) No. ASB MBB–BK117 C–2–85A–041,
Revision 4, dated February 12, 2015, or Administration (NARA). For information on www.regulations.gov by searching for
Emergency ASB No. ASB MBB–BK117 D–2– the availability of this material at NARA, call and locating Docket No. FAA–2015–
85A–002, Revision 1, dated February 12, (202) 741–6030, or go to: http://www. 3805, or in person at the Docket
2015, as applicable to your model helicopter; archives.gov/federal-register/cfr/ibr- Management Facility between 9 a.m.
or locations.html. and 5 p.m., Monday through Friday,

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6754 Federal Register / Vol. 81, No. 26 / Tuesday, February 9, 2016 / Rules and Regulations

except Federal holidays. The AD docket Costs of Compliance Adoption of the Amendment
contains this AD, the mandatory We estimate that this AD affects 300 Accordingly, under the authority
continuing airworthiness information engines installed on helicopters of U.S. delegated to me by the Administrator,
(MCAI), the regulatory evaluation, any registry. We estimate that it would take the FAA amends 14 CFR part 39 as
comments received, and other about 1 hour to perform an inspection. follows:
information. The address for the Docket We also estimate that 20% of these
Office (phone: 800–647–5527) is engines would fail the inspection and PART 39—AIRWORTHINESS
Document Management Facility, U.S. require TCB removal, which would take DIRECTIVES
Department of Transportation, Docket about 1 hour. The average labor rate is
Operations, M–30, West Building $85 per hour. Based on these figures, we ■ 1. The authority citation for part 39
Ground Floor, Room W12–140, 1200 estimate the cost of this AD on U.S. continues to read as follows:
New Jersey Avenue SE., Washington, operators to be $30,600. Authority: 49 U.S.C. 106(g), 40113, 44701.
DC 20590.
Authority for This Rulemaking § 39.13 [Amended]
FOR FURTHER INFORMATION CONTACT:
Brian Kierstead, Aerospace Engineer, Title 49 of the United States Code ■ 2. The FAA amends § 39.13 by adding
Engine Certification Office, FAA, Engine specifies the FAA’s authority to issue the following new airworthiness
& Propeller Directorate, 1200 District rules on aviation safety. Subtitle I, directive (AD):
Avenue, Burlington, MA 01803; phone: section 106, describes the authority of 2016–03–02 Turbomeca S.A.: Amendment
781–238–7772; fax: 781–238–7199; the FAA Administrator. ‘‘Subtitle VII: 39–18389; Docket No. FAA–2015–3805;
email: brian.kierstead@faa.gov. Aviation Programs,’’ describes in more Directorate Identifier 2015–NE–28–AD.
detail the scope of the Agency’s
SUPPLEMENTARY INFORMATION: (a) Effective Date
authority.
Discussion We are issuing this rulemaking under This AD becomes effective March 15, 2016.
the authority described in ‘‘Subtitle VII, (b) Affected ADs
We issued a notice of proposed
Part A, Subpart III, Section 44701:
rulemaking (NPRM) to amend 14 CFR None.
General requirements.’’ Under that
part 39 by adding an AD that would (c) Applicability
section, Congress charges the FAA with
apply to the specified products. The
promoting safe flight of civil aircraft in This AD applies to Turbomeca S.A.
NPRM was published in the Federal
air commerce by prescribing regulations ARRIEL 2C, 2C1, 2C2, 2S1, and 2S2
Register on November 5, 2015 (80 FR turboshaft engines with modification TU34
for practices, methods, and procedures
68475). The NPRM proposed to correct or TU34A installed.
the Administrator finds necessary for
an unsafe condition for the specified
safety in air commerce. This regulation (d) Reason
products. The MCAI states:
is within the scope of that authority This AD was prompted by torque
Several cases of torque conformation box because it addresses an unsafe condition conformation box (TCB) failures. We are
(TCB) failures have been reported on engines that is likely to exist or develop on issuing this AD to prevent failure of the TCB,
incorporating mod TU34 or mod TU34A. products identified in this rulemaking loss of engine thrust control, and damage to
Investigation concluded that these failures
were caused by cracks on soldered joints of
action. the helicopter.
TCB resistors. Regulatory Findings (e) Actions and Compliance
This condition, if not corrected, could lead Comply with this AD within the
to limited power availability in a One Engine We determined that this AD will not
have federalism implications under compliance times specified, unless already
Inoperative (OEI) case, possibly resulting in done.
reduced control of the helicopter. Executive Order 13132. This AD will
(1) Within 600 engine flight hours (EFHs)
not have a substantial direct effect on or 6 months after the effective date of this
Comments the States, on the relationship between AD, whichever occurs first, check the
the national government and the States, resistance values on the TCB. Use
We gave the public the opportunity to
or on the distribution of power and Accomplishment Instructions, paragraph
participate in developing this AD. We
responsibilities among the various 2.3.2 of Turbomeca S.A. Mandatory Service
received no comments on the NPRM (80 Bulletin 292 72 2860, Version A, dated July
levels of government.
FR 68475, November 5, 2015). For the reasons discussed above, I 15, 2015, to do the inspection. Repeat this
Conclusion certify this AD: inspection every 600 EFHs since last
(1) Is not a ‘‘significant regulatory inspection.
We reviewed the available data and action’’ under Executive Order 12866, (2) Remove before further flight any TCB
determined that air safety and the (2) Is not a ‘‘significant rule’’ under that fails the inspection required by
public interest require adopting this AD paragraph (e)(1) of this AD.
the DOT Regulatory Policies and
as proposed. Procedures (44 FR 11034, February 26, (f) Alternative Methods of Compliance
Related Service Information Under 1 1979), (AMOCs)
CFR Part 51 (3) Will not affect intrastate aviation The Manager, Engine Certification Office,
in Alaska to the extent that it justifies FAA, may approve AMOCs for this AD. Use
Turbomeca S.A. has issued making a regulatory distinction, and the procedures found in 14 CFR 39.19 to
Mandatory Service Bulletin (MSB) No. (4) Will not have a significant make your request. You may email your
292 72 2860, Version A, dated July 15, economic impact, positive or negative, request to: ANE-AD-AMOC@faa.gov.
2015. The MSB describes procedures for on a substantial number of small entities (g) Related Information
mstockstill on DSK4VPTVN1PROD with RULES

checking TCB resistance values. This under the criteria of the Regulatory
service information is reasonably (1) For more information about this AD,
Flexibility Act. contact Brian Kierstead, Aerospace Engineer,
available because the interested parties Engine Certification Office, FAA, Engine &
have access to it through their normal List of Subjects in 14 CFR Part 39
Propeller Directorate, 1200 District Avenue,
course of business or by the means Air transportation, Aircraft, Aviation Burlington, MA 01803; phone: 781–238–
identified in the ADDRESSES section of safety, Incorporation by reference, 7772; fax: 781–238–7199; email:
this final rule. Safety. brian.kierstead@faa.gov.

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Document Created: 2018-02-02 14:30:23
Document Modified: 2018-02-02 14:30:23

Category		Regulatory Information
Collection		Federal Register
sudoc Class		AE 2.7: GS 4.107: AE 2.106:
Publisher		Office of the Federal Register, National Archives and Records Administration
Section		Rules and Regulations
Action		Final rule.
Dates		This AD becomes effective March 15, 2016.
Contact		Brian Kierstead, Aerospace Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 1200 District Avenue, Burlington, MA 01803; phone: 781-238-7772; fax: 781- 238-7199; email: [email protected]
FR Citation		81 FR 6753
RIN Number		2120-AA64
CFR Associated		Air Transportation; Aircraft; Aviation Safety; Incorporation by Reference and Safety

81 FR 6753 - Airworthiness Directives; Turbomeca S.A. Turboshaft Engines

DEPARTMENT OF TRANSPORTATIONFederal Aviation Administration

Federal Register Volume 81, Issue 26 (February 9, 2016)

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration