Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters, 12393-12395 [2017-04115]

Download as PDF 12393 Rules and Regulations Federal Register Vol. 82, No. 41 Friday, March 3, 2017 This section of the FEDERAL REGISTER contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510. The Code of Federal Regulations is sold by the Superintendent of Documents. Prices of new books are listed in the first FEDERAL REGISTER issue of each week. DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2017–0169; Directorate Identifier 2017–SW–003–AD; Amendment 39–18818; AD 2017–02–51] RIN 2120–AA64 Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Final rule; request for comments. AGENCY: We are publishing a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S–92A helicopters. This AD requires inspecting certain bearings. This AD is prompted by reports of failed bearings with subsequent loss of tail rotor (TR) control. The actions of this AD are intended to address an unsafe condition on these helicopters. DATES: This AD becomes effective March 20, 2017 to all persons except those persons to whom it was made immediately effective by Emergency AD 2017–02–51 issued on January 13, 2017, which contains the requirements of this AD. We must receive comments on this AD by May 2, 2017. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your comments electronically. • Fax: 202–493–2251. • Mail: Send comments to the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington, DC 20590–0001. • Hand Delivery: Deliver to the ‘‘Mail’’ address between 9 a.m. and 5 mstockstill on DSK3G9T082PROD with RULES SUMMARY: VerDate Sep<11>2014 16:07 Mar 02, 2017 Jkt 241001 p.m., Monday through Friday, except Federal holidays. 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–2017– 0169; or in person at the Docket Operations Office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the economic evaluation, any comments received, and other information. The street address for the Docket Operations Office (telephone 800–647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. For service information identified in this final rule, contact Sikorsky Aircraft Corporation, Customer Service Engineering, 124 Quarry Road, Trumbull, CT 06611; telephone 1–800Winged-S or 203–416–4299; email: wcs_ cust_service_eng.gr-sik@lmco.com. You may review the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. FOR FURTHER INFORMATION CONTACT: Blaine Williams, Aerospace Engineer, Boston Aircraft Certification Office, Engine & Propeller Directorate, 1200 District Avenue, Burlington, Massachusetts 01803; telephone (781) 238–7161; email blaine.williams@ faa.gov. SUPPLEMENTARY INFORMATION: Comments Invited This AD is a final rule that involves requirements affecting flight safety, and we did not provide you with notice and an opportunity to provide your comments prior to it becoming effective. However, we invite you to participate in this rulemaking by submitting written comments, data, or views. We also invite comments relating to the economic, environmental, energy, or federalism impacts that resulted from adopting this AD. The most helpful comments reference a specific portion of the AD, 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 PO 00000 Frm 00001 Fmt 4700 Sfmt 4700 submit them only one time. We will file in the docket all comments that we receive, as well as a report summarizing each substantive public contact with FAA personnel concerning this rulemaking during the comment period. We will consider all the comments we receive and may conduct additional rulemaking based on those comments. Discussion On November 16, 2016, we issued Emergency AD 2016–24–51 to correct an unsafe condition on Sikorsky Model S–92A helicopters with a TR pitch change shaft (TRPCS) assembly, part number (P/N) 92358–06303–041 or P/N 92358–06303–042, with bearings that were manufactured prior to November 3, 2016. AD 2016–24–51 subsequently published in the Federal Register as a final rule (81 FR 95425, December 28, 2016). AD 2016–24–51 requires removing from service TRPCS assemblies with less than 5 hours timein-service (TIS) since new or overhaul. For TRPCS assemblies with between 5 and 80 hours TIS since new or overhaul, AD 2016–24–51 also requires performing one-time inspections of the TRPCS bearings and replacing the TRPCS assembly if the bearings do not pass these inspections. AD 2016–24–51 was prompted by two reports of an operator losing TR control caused by a failed TRPCS assembly. Actions Since AD 2016–24–51 Was Issued After AD 2016–24–51 was issued, we received a report of an S–92A helicopter losing TR control because of a failed bearing with more than 80 hours TIS. We have now determined that the unsafe condition can exist on TRPCS bearings regardless of hours TIS. Therefore, on January 13, 2017, we issued Emergency AD 2017–02–51, which applies to all TRPCS assemblies, regardless of hours TIS. Emergency AD 2017–02–51 requires a one-time visual inspection and a repetitive borescope inspection of the TRPCS assembly bearing. The repetitive inspection is intended to detect bearing deterioration. The actions in Emergency AD 2017–02– 51 are intended to detect a binding bearing, prevent loss of TR control, and possible loss of control of the helicopter. FAA’s Determination We are issuing this AD because we evaluated all the relevant information E:\FR\FM\03MRR1.SGM 03MRR1 12394 Federal Register / Vol. 82, No. 41 / Friday, March 3, 2017 / Rules and Regulations and determined the unsafe condition described previously is likely to exist or develop in other helicopters of the same type design. Related Service Information We reviewed Sikorsky Alert Service Bulletin 92–64–011, Basic Issue, dated January 10, 2017 (ASB). The ASB describes procedures for inspecting the TRPCS and bearing assemblies for ratcheting, binding, and rough turning. The ASB also specifies periodic review of the health and usage monitoring system (HUMS) tail gearbox bearing energy tool. AD Requirements This AD requires, before further flight, removing the TRPCS assembly and inspecting the bearing. If the bearing does not rotate freely; the bearing sounds rough or chatters; there is any purged grease with metal particles; a nick or dent; or if there is a cut, tear, or distortion in the bearing seal, before further flight, replacing the TRPCS assembly is required. This AD also requires, within 10 hours TIS, and thereafter at intervals not to exceed 10 hours TIS, inspecting the TRPCS assembly with a borescope. If the white Teflon seal or snap ring is missing, or if there is a rip, tear, or heat damage on the seal or if there is no gap in the snap ring, replacing the TRPCS assembly is required before further flight. mstockstill on DSK3G9T082PROD with RULES Differences Between This AD and the Service Information This AD requires repetitive borescope inspections of the TRPCS; the ASB does not. The ASB specifies that operators review HUMS data in addition to the one-time inspection and specifies contacting Sikorsky if any discrepancies are found; this AD does not. Costs of Compliance We estimate that this AD will affect 80 helicopters of U.S. Registry. We estimate that operators may incur the following costs in order to comply with this AD. At an average labor rate of $85 per hour, borescope and visually inspecting the TRPCS assembly will require 16 work-hours, for a cost per helicopter of $1,360 and a cost of $108,800 for the U.S. fleet per inspection. If required, replacing a TRPCS assembly will require 16 workhours and required parts will cost $4,000, for a cost per helicopter of $5,360. FAA’s Justification and Determination of the Effective Date Providing an opportunity for public comments prior to adopting these AD VerDate Sep<11>2014 16:07 Mar 02, 2017 Jkt 241001 requirements would delay implementing the safety actions needed to correct this known unsafe condition. Therefore, we found and continue to find that the risk to the flying public justifies waiving notice and comment prior to the adoption of this rule because the previously described unsafe condition can result in loss of TR control and certain actions must be accomplished before further flight and within 10 hours TIS, a very short interval for these helicopters. Since it was found that immediate corrective action was required, notice and opportunity for prior public comments before issuing this AD were impracticable and contrary to public interest and good cause existed to make the AD effective immediately by Emergency AD 2017–02–51, issued on January 13, 2017, to all known U.S. owners and operators of these helicopters. These conditions still exist and the AD is hereby published in the Federal Register as an amendment to section 39.13 of the Federal Aviation Regulations (14 CFR 39.13) to make it effective to all persons. 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, I certify that this AD: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; PO 00000 Frm 00002 Fmt 4700 Sfmt 4700 2. Is not a ‘‘significant rule’’ under 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. We prepared an economic evaluation of the estimated costs to comply with this AD and placed it in the AD docket. 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 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ 2017–02–51 Sikorsky Aircraft Corporation: Amendment 39–18818; Docket No. FAA–2017–FAA–2017–0169; Directorate Identifier 2017–SW–003–AD. (a) Applicability This AD applies to Sikorsky Aircraft Corporation (Sikorsky) Model S–92A helicopters, certificated in any category, with a tail rotor pitch change shaft (TRPCS) assembly part number (P/N) 92358–06303– 041 or P/N 92358–06303–042 installed. (b) Unsafe Condition This AD defines the unsafe condition as a binding TRPCS bearing. This condition could result in loss of tail rotor (TR) control and possible loss of control of the helicopter. (c) Effective Date This AD becomes effective March 20, 2017 to all persons except those persons to whom it was made immediately effective by Emergency AD 2017–02–51, issued on January 13, 2017, which contains the requirements of this AD. (d) Compliance You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time. (e) Required Actions (1) Before further flight, unless already done, remove the TRPCS assembly and E:\FR\FM\03MRR1.SGM 03MRR1 Federal Register / Vol. 82, No. 41 / Friday, March 3, 2017 / Rules and Regulations inspect the SB2310 angular contact bearing for free rotation, purged grease with metal particles, a nick or a dent, and any cut, tear, or distortion on the bearing seal. If the bearing does not rotate freely; the bearing sounds rough or chatters; there is any purged grease with metal particles; a nick or dent; or if there is a cut, tear, or distortion in the bearing seal, before further flight, replace the TRPCS assembly. (2) Within 10 hours time-in-service (TIS), unless already done within the last 10 hours TIS, and thereafter at intervals not to exceed 10 hours TIS, on the TR side of the TRPCS bearing, remove the plug from the end of the TRPCS, insert the borescope into the TRPCS, and determine whether the white Teflon seal and snap ring are installed. If the white Teflon seal or snap ring is missing, or if there is a rip, tear, or heat damage on the seal or if there is no gap in the snap ring, before further flight replace the TRPCS assembly. (f) Alternative Methods of Compliance (AMOCs) (1) The Manager, Boston Aircraft Certification Office, FAA, may approve AMOCs for this Emergency AD. Send your proposal to: Blaine Williams, Aerospace Engineer, Boston Aircraft Certification Office, Engine & Propeller Directorate, 1200 District Avenue, Burlington, Massachusetts 01803; telephone (781) 238–7161; email blaine.williams@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office before operating any aircraft complying with this AD through an AMOC. (g) Additional Information Sikorsky Alert Service Bulletin 92–64–011, Basic Issue, dated January 10, 2017, which is not incorporated by reference, contains additional information about the subject of this final rule. For service information identified in this final rule, contact Sikorsky Aircraft Corporation, Customer Service Engineering, 124 Quarry Road, Trumbull, CT 06611; telephone 1–800–Winged–S or 203– 416–4299; email: wcs_cust_service_eng.grsik@lmco.com. You may review this service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N–321, Fort Worth, TX 76177. (h) Subject mstockstill on DSK3G9T082PROD with RULES Issued in Fort Worth, Texas, on February 23, 2017. Lance T. Gant, Manager, Rotorcraft Directorate, Aircraft Certification Service. BILLING CODE 4910–13–P VerDate Sep<11>2014 16:07 Mar 02, 2017 Jkt 241001 Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2016–9345; Directorate Identifier 2016–CE–028–AD; Amendment 39–18801; AD 2017–04–06] RIN 2120–AA64 Airworthiness Directives; United Instruments, Inc. Series Altimeters Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: We are adopting a new airworthiness directive (AD) for certain United Instruments, Inc. 5934 series altimeters that were manufactured between January 2015 and February 2016 and installed in airplanes and helicopters. This AD was prompted by reports of certain altimeters displaying higher than actual altitude due to a slow diaphragm leak, which would affect the accuracy of the altimeters. This AD requires replacing the affected altimeters. We are issuing this AD to correct the unsafe condition on these products. SUMMARY: This AD is effective April 7, 2017. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of April 7, 2017. ADDRESSES: For service information identified in this final rule, contact United Instruments, Inc., 3625 Comotara Avenue, Wichita, KS 67226; telephone (316) 636–9203; fax: (316) 636–9243; email: customerservice@unitedinst.com; Internet: www.unitedinst.com or http:// www.unitedinst.com/Products/ SpecificationsSheets/d132811.aspx. You may view this referenced service information at the FAA, Small Airplane Directorate, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call (816) 329–4148. It is also available on the internet at http:// www.regulations.gov by searching for and locating Docket No. FAA–2016– 9345. DATES: Examining the AD Docket Joint Aircraft Service Component (JASC) Code: 6720 Tail Rotor Control System. [FR Doc. 2017–04115 Filed 3–2–17; 8:45 am] DEPARTMENT OF TRANSPORTATION You may examine the AD docket on the Internet at http:// www.regulations.gov by searching for and locating Docket No. FAA–2016– 9345; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains this AD, the regulatory PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 12395 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: Les Lyne, Aerospace Engineer, FAA, Wichita Aircraft Certification Office, 1801 Airport Road, Room 100, Wichita, Kansas 67209; telephone: (316) 946– 4190; fax: (316) 946–4107; email: leslie.lyne@faa.gov. 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 certain United Instruments, Inc. 5934 series altimeters that were manufactured between January 2015 and February 2016 and installed in airplanes and helicopters. The NPRM published in the Federal Register on November 7, 2016 (81 FR 78083). The NPRM was prompted by a report that certain 5934 series altimeters that were manufactured between January 2015 and February 2016 may display higher than actual altitude. These altimeters are susceptible to developing a slow diaphragm leak, which would affect the accuracy of the altimeters. It has been determined that insufficient removal of chemical substance on the diaphragm assembly during the production process of the altimeter caused the misleading display of altitude data. The NPRM proposed to require replacing the affected altimeters. We are issuing this AD to prevent display of misleading altitude data, which could result in inadvertent flight into terrain. Comments We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM or on the determination of the cost to the public. Conclusion We reviewed the relevant data and determined that air safety and the public interest require adopting this AD as proposed except for minor editorial changes. We have determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM for correcting the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. E:\FR\FM\03MRR1.SGM 03MRR1

Agencies

[Federal Register Volume 82, Number 41 (Friday, March 3, 2017)]
[Rules and Regulations]
[Pages 12393-12395]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-04115]



========================================================================
Rules and Regulations
                                                Federal Register
________________________________________________________________________

This section of the FEDERAL REGISTER contains regulatory documents 
having general applicability and legal effect, most of which are keyed 
to and codified in the Code of Federal Regulations, which is published 
under 50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by the Superintendent of Documents. 
Prices of new books are listed in the first FEDERAL REGISTER issue of each 
week.

========================================================================


Federal Register / Vol. 82, No. 41 / Friday, March 3, 2017 / Rules 
and Regulations

[[Page 12393]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0169; Directorate Identifier 2017-SW-003-AD; 
Amendment 39-18818; AD 2017-02-51]
RIN 2120-AA64


Airworthiness Directives; Sikorsky Aircraft Corporation 
Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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

SUMMARY: We are publishing a new airworthiness directive (AD) for 
Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This 
AD requires inspecting certain bearings. This AD is prompted by reports 
of failed bearings with subsequent loss of tail rotor (TR) control. The 
actions of this AD are intended to address an unsafe condition on these 
helicopters.

DATES: This AD becomes effective March 20, 2017 to all persons except 
those persons to whom it was made immediately effective by Emergency AD 
2017-02-51 issued on January 13, 2017, which contains the requirements 
of this AD. We must receive comments on this AD by May 2, 2017.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your 
comments electronically.
     Fax: 202-493-2251.
     Mail: Send comments to the U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590-0001.
     Hand Delivery: Deliver to the ``Mail'' address between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.

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-2017-
0169; or in person at the Docket Operations Office between 9 a.m. and 5 
p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this AD, the economic evaluation, any comments received, and 
other information. The street address for the Docket Operations Office 
(telephone 800-647-5527) is in the ADDRESSES section. Comments will be 
available in the AD docket shortly after receipt.
    For service information identified in this final rule, contact 
Sikorsky Aircraft Corporation, Customer Service Engineering, 124 Quarry 
Road, Trumbull, CT 06611; telephone 1-800-Winged-S or 203-416-4299; 
email: wcs_cust_service_eng.gr-sik@lmco.com. You may review the 
referenced service information at the FAA, Office of the Regional 
Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort 
Worth, TX 76177.

FOR FURTHER INFORMATION CONTACT: Blaine Williams, Aerospace Engineer, 
Boston Aircraft Certification Office, Engine & Propeller Directorate, 
1200 District Avenue, Burlington, Massachusetts 01803; telephone (781) 
238-7161; email blaine.williams@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    This AD is a final rule that involves requirements affecting flight 
safety, and we did not provide you with notice and an opportunity to 
provide your comments prior to it becoming effective. However, we 
invite you to participate in this rulemaking by submitting written 
comments, data, or views. We also invite comments relating to the 
economic, environmental, energy, or federalism impacts that resulted 
from adopting this AD. The most helpful comments reference a specific 
portion of the AD, 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 them only one time. We will file in the docket all comments that 
we receive, as well as a report summarizing each substantive public 
contact with FAA personnel concerning this rulemaking during the 
comment period. We will consider all the comments we receive and may 
conduct additional rulemaking based on those comments.

Discussion

    On November 16, 2016, we issued Emergency AD 2016-24-51 to correct 
an unsafe condition on Sikorsky Model S-92A helicopters with a TR pitch 
change shaft (TRPCS) assembly, part number (P/N) 92358-06303-041 or P/N 
92358-06303-042, with bearings that were manufactured prior to November 
3, 2016. AD 2016-24-51 subsequently published in the Federal Register 
as a final rule (81 FR 95425, December 28, 2016). AD 2016-24-51 
requires removing from service TRPCS assemblies with less than 5 hours 
time-in-service (TIS) since new or overhaul. For TRPCS assemblies with 
between 5 and 80 hours TIS since new or overhaul, AD 2016-24-51 also 
requires performing one-time inspections of the TRPCS bearings and 
replacing the TRPCS assembly if the bearings do not pass these 
inspections. AD 2016-24-51 was prompted by two reports of an operator 
losing TR control caused by a failed TRPCS assembly.

Actions Since AD 2016-24-51 Was Issued

    After AD 2016-24-51 was issued, we received a report of an S-92A 
helicopter losing TR control because of a failed bearing with more than 
80 hours TIS. We have now determined that the unsafe condition can 
exist on TRPCS bearings regardless of hours TIS. Therefore, on January 
13, 2017, we issued Emergency AD 2017-02-51, which applies to all TRPCS 
assemblies, regardless of hours TIS. Emergency AD 2017-02-51 requires a 
one-time visual inspection and a repetitive borescope inspection of the 
TRPCS assembly bearing. The repetitive inspection is intended to detect 
bearing deterioration. The actions in Emergency AD 2017-02-51 are 
intended to detect a binding bearing, prevent loss of TR control, and 
possible loss of control of the helicopter.

FAA's Determination

    We are issuing this AD because we evaluated all the relevant 
information

[[Page 12394]]

and determined the unsafe condition described previously is likely to 
exist or develop in other helicopters of the same type design.

Related Service Information

    We reviewed Sikorsky Alert Service Bulletin 92-64-011, Basic Issue, 
dated January 10, 2017 (ASB). The ASB describes procedures for 
inspecting the TRPCS and bearing assemblies for ratcheting, binding, 
and rough turning. The ASB also specifies periodic review of the health 
and usage monitoring system (HUMS) tail gearbox bearing energy tool.

AD Requirements

    This AD requires, before further flight, removing the TRPCS 
assembly and inspecting the bearing. If the bearing does not rotate 
freely; the bearing sounds rough or chatters; there is any purged 
grease with metal particles; a nick or dent; or if there is a cut, 
tear, or distortion in the bearing seal, before further flight, 
replacing the TRPCS assembly is required. This AD also requires, within 
10 hours TIS, and thereafter at intervals not to exceed 10 hours TIS, 
inspecting the TRPCS assembly with a borescope. If the white Teflon 
seal or snap ring is missing, or if there is a rip, tear, or heat 
damage on the seal or if there is no gap in the snap ring, replacing 
the TRPCS assembly is required before further flight.

Differences Between This AD and the Service Information

    This AD requires repetitive borescope inspections of the TRPCS; the 
ASB does not. The ASB specifies that operators review HUMS data in 
addition to the one-time inspection and specifies contacting Sikorsky 
if any discrepancies are found; this AD does not.

Costs of Compliance

    We estimate that this AD will affect 80 helicopters of U.S. 
Registry.
    We estimate that operators may incur the following costs in order 
to comply with this AD. At an average labor rate of $85 per hour, 
borescope and visually inspecting the TRPCS assembly will require 16 
work-hours, for a cost per helicopter of $1,360 and a cost of $108,800 
for the U.S. fleet per inspection. If required, replacing a TRPCS 
assembly will require 16 work-hours and required parts will cost 
$4,000, for a cost per helicopter of $5,360.

FAA's Justification and Determination of the Effective Date

    Providing an opportunity for public comments prior to adopting 
these AD requirements would delay implementing the safety actions 
needed to correct this known unsafe condition. Therefore, we found and 
continue to find that the risk to the flying public justifies waiving 
notice and comment prior to the adoption of this rule because the 
previously described unsafe condition can result in loss of TR control 
and certain actions must be accomplished before further flight and 
within 10 hours TIS, a very short interval for these helicopters.
    Since it was found that immediate corrective action was required, 
notice and opportunity for prior public comments before issuing this AD 
were impracticable and contrary to public interest and good cause 
existed to make the AD effective immediately by Emergency AD 2017-02-
51, issued on January 13, 2017, to all known U.S. owners and operators 
of these helicopters. These conditions still exist and the AD is hereby 
published in the Federal Register as an amendment to section 39.13 of 
the Federal Aviation Regulations (14 CFR 39.13) to make it effective to 
all persons.

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, I certify that this AD:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under 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.
    We prepared an economic evaluation of the estimated costs to comply 
with this AD and placed it in the AD docket.

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):

2017-02-51 Sikorsky Aircraft Corporation: Amendment 39-18818; Docket 
No. FAA-2017-FAA-2017-0169; Directorate Identifier 2017-SW-003-AD.

(a) Applicability

    This AD applies to Sikorsky Aircraft Corporation (Sikorsky) 
Model S-92A helicopters, certificated in any category, with a tail 
rotor pitch change shaft (TRPCS) assembly part number (P/N) 92358-
06303-041 or P/N 92358-06303-042 installed.

(b) Unsafe Condition

    This AD defines the unsafe condition as a binding TRPCS bearing. 
This condition could result in loss of tail rotor (TR) control and 
possible loss of control of the helicopter.

(c) Effective Date

    This AD becomes effective March 20, 2017 to all persons except 
those persons to whom it was made immediately effective by Emergency 
AD 2017-02-51, issued on January 13, 2017, which contains the 
requirements of this AD.

(d) Compliance

    You are responsible for performing each action required by this 
AD within the specified compliance time unless it has already been 
accomplished prior to that time.

(e) Required Actions

    (1) Before further flight, unless already done, remove the TRPCS 
assembly and

[[Page 12395]]

inspect the SB2310 angular contact bearing for free rotation, purged 
grease with metal particles, a nick or a dent, and any cut, tear, or 
distortion on the bearing seal. If the bearing does not rotate 
freely; the bearing sounds rough or chatters; there is any purged 
grease with metal particles; a nick or dent; or if there is a cut, 
tear, or distortion in the bearing seal, before further flight, 
replace the TRPCS assembly.
    (2) Within 10 hours time-in-service (TIS), unless already done 
within the last 10 hours TIS, and thereafter at intervals not to 
exceed 10 hours TIS, on the TR side of the TRPCS bearing, remove the 
plug from the end of the TRPCS, insert the borescope into the TRPCS, 
and determine whether the white Teflon seal and snap ring are 
installed. If the white Teflon seal or snap ring is missing, or if 
there is a rip, tear, or heat damage on the seal or if there is no 
gap in the snap ring, before further flight replace the TRPCS 
assembly.

(f) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Boston Aircraft Certification Office, FAA, may 
approve AMOCs for this Emergency AD. Send your proposal to: Blaine 
Williams, Aerospace Engineer, Boston Aircraft Certification Office, 
Engine & Propeller Directorate, 1200 District Avenue, Burlington, 
Massachusetts 01803; telephone (781) 238-7161; email 
blaine.williams@faa.gov.
    (2) For operations conducted under a 14 CFR part 119 operating 
certificate or under 14 CFR part 91, subpart K, we suggest that you 
notify your principal inspector, or lacking a principal inspector, 
the manager of the local flight standards district office or 
certificate holding district office before operating any aircraft 
complying with this AD through an AMOC.

(g) Additional Information

    Sikorsky Alert Service Bulletin 92-64-011, Basic Issue, dated 
January 10, 2017, which is not incorporated by reference, contains 
additional information about the subject of this final rule. For 
service information identified in this final rule, contact Sikorsky 
Aircraft Corporation, Customer Service Engineering, 124 Quarry Road, 
Trumbull, CT 06611; telephone 1-800-Winged-S or 203-416-4299; email: 
wcs_cust_service_eng.gr-sik@lmco.com. You may review this service 
information at the FAA, Office of the Regional Counsel, Southwest 
Region, 10101 Hillwood Pkwy., Room 6N-321, Fort Worth, TX 76177.

(h) Subject

    Joint Aircraft Service Component (JASC) Code: 6720 Tail Rotor 
Control System.


    Issued in Fort Worth, Texas, on February 23, 2017.
Lance T. Gant,
Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2017-04115 Filed 3-2-17; 8:45 am]
 BILLING CODE 4910-13-P