Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters, 25748-25750 [2017-11128]

Download as PDF 25748 Federal Register / Vol. 82, No. 106 / Monday, June 5, 2017 / Proposed Rules For the reasons discussed above, I certify this proposed regulation: 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; 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. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ Bombardier, Inc.: Docket No. FAA–2017– 0528; Directorate Identifier 2017–NM– 028–AD. (a) Comments Due Date We must receive comments by July 20, 2017. (b) Affected ADs None. (c) Applicability This AD applies to Bombardier, Inc., Model CL–600–2B16 (CL–604 Variant) airplanes, certificated in any category, serial numbers 5301 through 5665 inclusive; 5701 through 5988 inclusive; and 6050 through 6080 inclusive. nlaroche on DSK30NT082PROD with PROPOSALS (d) Subject Air Transport Association (ATA) of America Code 34, Navigation. (e) Reason This AD was prompted by reports of inservice incidents regarding the loss of all air data system information provided to the flightcrew. We are issuing this AD to provide the flightcrew with procedures for ‘‘Unreliable Airspeed’’ that stabilize the airplane’s airspeed and attitude for continued safe flight and landing. (f) Compliance Comply with this AD within the compliance times specified, unless already done. VerDate Sep<11>2014 13:57 Jun 02, 2017 Jkt 241001 (g) Revision of the Airplane Flight Manual (AFM) Within 30 days after the effective date of this AD: Revise the Emergency Procedures section of the AFM to include the information in Unreliable Airspeed, of Section 03–15, Instruments System, of Chapter 3, Emergency Procedures, of the applicable AFM specified in paragraph (g)(1), (g)(2), or (g)(3) of this AD. These revisions incorporate a procedure for ‘‘Unreliable Airspeed.’’ Thereafter, operate the airplane according to the limitation and procedure in the applicable revision. (1) For airplanes having serial numbers 5301 through 5665 inclusive: Bombardier Challenger 604 AFM, PSP 604–1, Revision 103, dated November 28, 2016. (2) For airplanes having serial numbers 5701 through 5988 inclusive (Marketing Designation—Challenger 605): Bombardier Challenger 605 AFM, PSP 605–1, Revision 41, dated November 28, 2016. (3) For airplanes having serial numbers 6050 through 6080 inclusive (Marketing Designation—Challenger 650): Bombardier Challenger 650 AFM, PSP 650–1, Revision 6, dated November 28, 2016. (h) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York Aircraft Certification Office (ACO), ANE–170, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the New York ACO, send it to: ATTN: the Program Manager, Continuing Operational Safety, New York ACO, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7300; fax 516–794–5531. Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/certificate holding district office. (2) Contacting the Manufacturer: For any requirement in this AD to obtain corrective actions from a manufacturer, the action must be accomplished using a method approved by the Manager, New York ACO, ANE–170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.’s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (i) Related Information (1) Refer to Mandatory Continuing Airworthiness Information (MCAI) Canadian Airworthiness Directive CF–2017–01, dated January 6, 2017, for related information. This MCAI may be found in the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA– 2017–0528. (2) For more information about this AD, contact Assata Dessaline, Aerospace Engineer, Avionics and Services Branch, ANE–172, FAA, New York Aircraft PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7301; fax 516–794–5531. (3) For service information identified in ˆ this AD, contact Bombardier, Inc., 400 Cote´ Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; telephone: 514–855–5000; fax: 514– 855–7401; email: thd.crj@ aero.bombardier.com; Internet: http:// www.bombardier.com. You may view this service information at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information on the availability of this material at the FAA, call 425–227–1221. Issued in Renton, Washington, on May 23, 2017. Michael Kaszycki, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. 2017–11256 Filed 6–2–17; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2017–0491; Directorate Identifier 2016–SW–020–AD] RIN 2120–AA64 Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: We propose to adopt a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S–76A, S–76B, S–76C, and S– 76D helicopters. This proposed AD would require inspecting the main rotor (M/R) servo pushrod (pushrod) assembly and applying slippage marks. This proposed AD is prompted by an accident of a Sikorsky Model S–76C helicopter caused by a failed pushrod assembly. The proposed actions are intended to prevent an unsafe condition on these products. DATES: We must receive comments on this proposed AD by August 4, 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. SUMMARY: E:\FR\FM\05JNP1.SGM 05JNP1 Federal Register / Vol. 82, No. 106 / Monday, June 5, 2017 / Proposed Rules • 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– 0491; 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 proposed 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 proposed 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: nlaroche on DSK30NT082PROD with PROPOSALS Comments Invited 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 might result from adopting the proposals in this document. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. To ensure the docket does not contain duplicate comments, commenters should send only one copy of written comments, or if comments are filed electronically, commenters should submit only one time. We will file in the docket all comments that we receive, as well as a report summarizing each substantive public contact with FAA personnel concerning this proposed rulemaking. Before acting on this proposal, we will VerDate Sep<11>2014 13:57 Jun 02, 2017 Jkt 241001 consider all comments we receive on or before the closing date for comments. We will consider comments filed after the comment period has closed if it is possible to do so without incurring expense or delay. We may change this proposal in light of the comments we receive. Discussion We propose to adopt a new AD for Sikorsky Model S–76A, S–76B, S–76C, and S–76D helicopters with a serial number up to and including 761075 and with an M/R pushrod assembly part number (P/N) 76400–00034–059, 76400–00014–074, 76400–00014–076, or 76400–00014–077 installed. This proposed AD would not affect the requirements of AD 2015–19–51, which was issued as an emergency AD on September 14, 2015, and published in the Federal Register on October 26, 2015 (80 FR 65128). AD 2015–19–51 applies to Sikorsky Model S–76A, S– 76B, S–76C, and S–76D helicopters with M/R pushrod assembly P/N 76400– 00034–059 or tail rotor pushrod assembly P/N 76400–00014–071. AD 2015–19–51 requires inspecting the pushrod assemblies and jamnuts, and applying slippage marks across the pushrod tubes and jamnuts. This new proposed AD would apply to M/R pushrod assembly P/N 76400–00034– 059 as well as M/R pushrod assemblies that are installed farther away from the servo actuators. Further flight testing has revealed additional data regarding the vibration environment of these M/R pushrod assemblies making it necessary to inspect the pushrod assemblies and jamnuts and apply torque to the jamnuts. This proposed AD would require inspecting the M/R forward, aft, and lateral pushrod assembly control rods and jamnuts, applying torque to the jamnuts, and applying slippage marks across the control rods and jamnuts. This proposed AD is prompted by an accident of a Sikorsky Model S–76C helicopter caused by a loose jamnut and subsequent failure of the pushrod assembly. Separation of the control rod and the rod end was found. The proposed actions are intended to detect a loose jamnut and prevent failure of the pushrod assembly, loss of M/R flight control, and subsequent loss of control of the helicopter. FAA’s Determination We are proposing this AD because we evaluated all known relevant information and determined that an unsafe condition exists and is likely to exist or develop on other helicopters of these same type designs. PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 25749 Related Service Information We reviewed Sikorksy S–76 Helicopter Alert Service Bulletin 76– 67–58, Basic Issue, dated November 19, 2015 (ASB), which specifies a one-time inspection of the M/R forward, aft, and lateral pushrod assemblies and jamnuts for proper installation, condition, and security. If a pushrod or jamnut does not meet criteria specified in the inspections, the ASB specifies replacing the assembly. The ASB also specifies applying torque to each jamnut and applying two slippage marks across each control rod and jamnut. Proposed AD Requirements This proposed AD would require, within 300 hours time-in-service, inspecting each pushrod assembly by inspecting the position of the rod end in the control rod. If the lockwire passes through the inspection hole, this proposed AD would require replacing the pushrod assembly. If the lockwire does not pass through the inspection hole, this proposed AD would require inspecting the jamnut to determine seating position against the control rod and whether the jamnut can be turned with finger pressure. If the jamnut is not seated against the control rod or is loose, this proposed AD would require replacing the pushrod assembly. If the jamnut is seated against the control rod and cannot be turned with finger pressure, this proposed AD would require applying 140 inch-pounds of torque to the jamnut while using a pushrod tool. This proposed AD would also require, both for those pushrod assemblies that are replaced and for those that pass the inspections, applying two slippage marks across each control rod and jamnut. Differences Between This Proposed AD and the Service Information The Sikorsky ASB specifies returning any removed M/R pushrod assembly to Sikorsky. This proposed AD does not require returning any parts to Sikorsky. Costs of Compliance We estimate that this proposed AD would affect 198 helicopters of U.S. Registry. We estimate that operators may incur the following costs in order to comply with this AD. Labor costs are estimated at $85 per work-hour. Inspecting the M/ R pushrod assemblies would take about 2.2 work-hours for an estimated cost of $187 per helicopter and $37,026 for the U.S. fleet. Replacing an M/R pushrod assembly would take about 2 workhours for a labor cost of $170. Parts to replace M/R pushrod assembly P/N 76400–00034–059 would cost about E:\FR\FM\05JNP1.SGM 05JNP1 25750 Federal Register / Vol. 82, No. 106 / Monday, June 5, 2017 / Proposed Rules $2,411 for a total estimated replacement cost of $2,581. Parts to replace M/R pushrod assembly P/N 76400–00014–074 would cost about $2,224 for a total estimated replacement cost of $2,394. Parts to replace M/R pushrod assembly P/N 76400–00014–076 would cost about $2,488 for a total estimated replacement cost of $2,658. Parts to replace M/R pushrod assembly P/N 76400–00014– 077 would cost about $2,414 for a total estimated replacement cost of $2,584. It takes a minimal amount of time to apply the slippage marks for a negligible cost. nlaroche on DSK30NT082PROD with PROPOSALS 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 proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed, I certify this proposed regulation: 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. We prepared an economic evaluation of the estimated costs to comply with VerDate Sep<11>2014 13:57 Jun 02, 2017 Jkt 241001 this proposed 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. The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 1. The authority citation for part 39 continues to read as follows: ■ Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD): ■ Sikorsky Aircraft Corporation: Docket No. FAA–2017–0491; Directorate Identifier 2016–SW–020–AD. (a) Applicability This AD applies to Model S–76A, S–76B, S–76C, and S–76D helicopters, serial numbers up to and including 761075, with a main rotor (M/R) servo pushrod (pushrod) assembly part number (P/N) 76400–00034– 059, 76400–00014–074, 76400–00014–076, or 76400–00014–077 installed, certificated in any category. Note 1 to paragraph (a) of this AD: M/R pushrod P/N 76400–00034–059 is included in the Applicability section of AD 2015–19– 51, Amendment 39–18300 (80 FR 65128, October 26, 2015). This AD does not affect AD 2015–19–51. (b) Unsafe Condition This AD defines the unsafe condition as a loose jamnut. This condition could result in failure of a pushrod assembly, loss of M/R flight control, and subsequent loss of control of the helicopter. (c) Comments Due Date We must receive comments by August 4, 2017. (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 Within 300 hours time-in-service: (1) Inspect the control rod of each pushrod assembly (control rod) to determine whether 0.020 inch diameter lockwire can pass through the inspection hole. (i) If the lockwire passes through the inspection hole, before further flight, replace the pushrod assembly. (ii) If the lockwire does not pass through the inspection hole, inspect the jamnut to determine whether it is seated against the PO 00000 Frm 00009 Fmt 4702 Sfmt 9990 control rod and whether it can be turned with finger pressure. (A) If the jamnut is not seated against the control rod or can be turned with finger pressure, before further flight, replace the pushrod assembly. (B) If the jamnut is seated against the control rod and cannot be turned with finger pressure, using a pushrod tool, apply 140 inch-pounds of torque to the jamnut. (2) Apply two slippage marks across each control rod and jamnut as follows: (i) Clean the area where a slippage mark is to be applied. (ii) Apply two slippage marks across the control rod and jamnut, parallel and on opposite sides of each other. Each slippage mark must extend at least 0.5 inch onto the control rod and must not cover the inspection hole. Figure 1 (Sheet 2) of Sikorsky S–76 Helicopter Alert Service Bulletin 76–67–58, Basic Issue, dated November 19, 2015, illustrates a slippage mark across a control rod and jamnut. (f) Alternative Methods of Compliance (AMOC) (1) The Manager, Boston Aircraft Certification Office, FAA, may approve AMOCs for this 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 Sikorksy S–76 Helicopter Alert Service Bulletin 76–67–58, Basic Issue, dated November 19, 2015, which is not incorporated by reference, contains additional information about the subject of this AD. For service information identified in this AD, 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 a copy of 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: 6700, Rotorcraft Flight Control. Issued in Fort Worth, Texas, on May 17, 2017. Scott A. Horn, Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. 2017–11128 Filed 6–2–17; 8:45 am] BILLING CODE 4910–13–P E:\FR\FM\05JNP1.SGM 05JNP1

Agencies

[Federal Register Volume 82, Number 106 (Monday, June 5, 2017)]
[Proposed Rules]
[Pages 25748-25750]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2017-11128]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2017-0491; Directorate Identifier 2016-SW-020-AD]
RIN 2120-AA64


Airworthiness Directives; Sikorsky Aircraft Corporation 
Helicopters

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
Sikorsky Aircraft Corporation (Sikorsky) Model S-76A, S-76B, S-76C, and 
S-76D helicopters. This proposed AD would require inspecting the main 
rotor (M/R) servo pushrod (pushrod) assembly and applying slippage 
marks. This proposed AD is prompted by an accident of a Sikorsky Model 
S-76C helicopter caused by a failed pushrod assembly. The proposed 
actions are intended to prevent an unsafe condition on these products.

DATES: We must receive comments on this proposed AD by August 4, 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.

[[Page 25749]]

     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-
0491; 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 proposed 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 proposed 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

    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 might 
result from adopting the proposals in this document. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. To 
ensure the docket does not contain duplicate comments, commenters 
should send only one copy of written comments, or if comments are filed 
electronically, commenters should submit only one time.
    We will file in the docket all comments that we receive, as well as 
a report summarizing each substantive public contact with FAA personnel 
concerning this proposed rulemaking. Before acting on this proposal, we 
will consider all comments we receive on or before the closing date for 
comments. We will consider comments filed after the comment period has 
closed if it is possible to do so without incurring expense or delay. 
We may change this proposal in light of the comments we receive.

Discussion

    We propose to adopt a new AD for Sikorsky Model S-76A, S-76B, S-
76C, and S-76D helicopters with a serial number up to and including 
761075 and with an M/R pushrod assembly part number (P/N) 76400-00034-
059, 76400-00014-074, 76400-00014-076, or 76400-00014-077 installed. 
This proposed AD would not affect the requirements of AD 2015-19-51, 
which was issued as an emergency AD on September 14, 2015, and 
published in the Federal Register on October 26, 2015 (80 FR 65128). AD 
2015-19-51 applies to Sikorsky Model S-76A, S-76B, S-76C, and S-76D 
helicopters with M/R pushrod assembly P/N 76400-00034-059 or tail rotor 
pushrod assembly P/N 76400-00014-071. AD 2015-19-51 requires inspecting 
the pushrod assemblies and jamnuts, and applying slippage marks across 
the pushrod tubes and jamnuts. This new proposed AD would apply to M/R 
pushrod assembly P/N 76400-00034-059 as well as M/R pushrod assemblies 
that are installed farther away from the servo actuators. Further 
flight testing has revealed additional data regarding the vibration 
environment of these M/R pushrod assemblies making it necessary to 
inspect the pushrod assemblies and jamnuts and apply torque to the 
jamnuts.
    This proposed AD would require inspecting the M/R forward, aft, and 
lateral pushrod assembly control rods and jamnuts, applying torque to 
the jamnuts, and applying slippage marks across the control rods and 
jamnuts. This proposed AD is prompted by an accident of a Sikorsky 
Model S-76C helicopter caused by a loose jamnut and subsequent failure 
of the pushrod assembly. Separation of the control rod and the rod end 
was found. The proposed actions are intended to detect a loose jamnut 
and prevent failure of the pushrod assembly, loss of M/R flight 
control, and subsequent loss of control of the helicopter.

FAA's Determination

    We are proposing this AD because we evaluated all known relevant 
information and determined that an unsafe condition exists and is 
likely to exist or develop on other helicopters of these same type 
designs.

Related Service Information

    We reviewed Sikorksy S-76 Helicopter Alert Service Bulletin 76-67-
58, Basic Issue, dated November 19, 2015 (ASB), which specifies a one-
time inspection of the M/R forward, aft, and lateral pushrod assemblies 
and jamnuts for proper installation, condition, and security. If a 
pushrod or jamnut does not meet criteria specified in the inspections, 
the ASB specifies replacing the assembly. The ASB also specifies 
applying torque to each jamnut and applying two slippage marks across 
each control rod and jamnut.

Proposed AD Requirements

    This proposed AD would require, within 300 hours time-in-service, 
inspecting each pushrod assembly by inspecting the position of the rod 
end in the control rod. If the lockwire passes through the inspection 
hole, this proposed AD would require replacing the pushrod assembly. If 
the lockwire does not pass through the inspection hole, this proposed 
AD would require inspecting the jamnut to determine seating position 
against the control rod and whether the jamnut can be turned with 
finger pressure. If the jamnut is not seated against the control rod or 
is loose, this proposed AD would require replacing the pushrod 
assembly. If the jamnut is seated against the control rod and cannot be 
turned with finger pressure, this proposed AD would require applying 
140 inch-pounds of torque to the jamnut while using a pushrod tool. 
This proposed AD would also require, both for those pushrod assemblies 
that are replaced and for those that pass the inspections, applying two 
slippage marks across each control rod and jamnut.

Differences Between This Proposed AD and the Service Information

    The Sikorsky ASB specifies returning any removed M/R pushrod 
assembly to Sikorsky. This proposed AD does not require returning any 
parts to Sikorsky.

Costs of Compliance

    We estimate that this proposed AD would affect 198 helicopters of 
U.S. Registry.
    We estimate that operators may incur the following costs in order 
to comply with this AD. Labor costs are estimated at $85 per work-hour. 
Inspecting the M/R pushrod assemblies would take about 2.2 work-hours 
for an estimated cost of $187 per helicopter and $37,026 for the U.S. 
fleet. Replacing an M/R pushrod assembly would take about 2 work-hours 
for a labor cost of $170. Parts to replace M/R pushrod assembly P/N 
76400-00034-059 would cost about

[[Page 25750]]

$2,411 for a total estimated replacement cost of $2,581.
    Parts to replace M/R pushrod assembly P/N 76400-00014-074 would 
cost about $2,224 for a total estimated replacement cost of $2,394. 
Parts to replace M/R pushrod assembly P/N 76400-00014-076 would cost 
about $2,488 for a total estimated replacement cost of $2,658. Parts to 
replace M/R pushrod assembly P/N 76400-00014-077 would cost about 
$2,414 for a total estimated replacement cost of $2,584. It takes a 
minimal amount of time to apply the slippage marks for a negligible 
cost.

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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed, I certify this proposed regulation:
    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.
    We prepared an economic evaluation of the estimated costs to comply 
with this proposed 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.

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

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

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


Sec.  39.13   [Amended]

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

Sikorsky Aircraft Corporation: Docket No. FAA-2017-0491; Directorate 
Identifier 2016-SW-020-AD.

(a) Applicability

    This AD applies to Model S-76A, S-76B, S-76C, and S-76D 
helicopters, serial numbers up to and including 761075, with a main 
rotor (M/R) servo pushrod (pushrod) assembly part number (P/N) 
76400-00034-059, 76400-00014-074, 76400-00014-076, or 76400-00014-
077 installed, certificated in any category.
    Note 1 to paragraph (a) of this AD: M/R pushrod P/N 76400-00034-
059 is included in the Applicability section of AD 2015-19-51, 
Amendment 39-18300 (80 FR 65128, October 26, 2015). This AD does not 
affect AD 2015-19-51.

(b) Unsafe Condition

    This AD defines the unsafe condition as a loose jamnut. This 
condition could result in failure of a pushrod assembly, loss of M/R 
flight control, and subsequent loss of control of the helicopter.

(c) Comments Due Date

    We must receive comments by August 4, 2017.

(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

    Within 300 hours time-in-service:
    (1) Inspect the control rod of each pushrod assembly (control 
rod) to determine whether 0.020 inch diameter lockwire can pass 
through the inspection hole.
    (i) If the lockwire passes through the inspection hole, before 
further flight, replace the pushrod assembly.
    (ii) If the lockwire does not pass through the inspection hole, 
inspect the jamnut to determine whether it is seated against the 
control rod and whether it can be turned with finger pressure.
    (A) If the jamnut is not seated against the control rod or can 
be turned with finger pressure, before further flight, replace the 
pushrod assembly.
    (B) If the jamnut is seated against the control rod and cannot 
be turned with finger pressure, using a pushrod tool, apply 140 
inch-pounds of torque to the jamnut.
    (2) Apply two slippage marks across each control rod and jamnut 
as follows:
    (i) Clean the area where a slippage mark is to be applied.
    (ii) Apply two slippage marks across the control rod and jamnut, 
parallel and on opposite sides of each other. Each slippage mark 
must extend at least 0.5 inch onto the control rod and must not 
cover the inspection hole. Figure 1 (Sheet 2) of Sikorsky S-76 
Helicopter Alert Service Bulletin 76-67-58, Basic Issue, dated 
November 19, 2015, illustrates a slippage mark across a control rod 
and jamnut.

(f) Alternative Methods of Compliance (AMOC)

    (1) The Manager, Boston Aircraft Certification Office, FAA, may 
approve AMOCs for this 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

    Sikorksy S-76 Helicopter Alert Service Bulletin 76-67-58, Basic 
Issue, dated November 19, 2015, which is not incorporated by 
reference, contains additional information about the subject of this 
AD. For service information identified in this AD, 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 a copy of 
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: 6700, Rotorcraft 
Flight Control.


    Issued in Fort Worth, Texas, on May 17, 2017.
Scott A. Horn,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 2017-11128 Filed 6-2-17; 8:45 am]
 BILLING CODE 4910-13-P