Document ID: FAA-2018-0439-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Sikorsky Aircraft Corporation
Posted Date: 2018-05-17T04:00Z

[Federal Register Volume 83, Number 96 (Thursday, May 17, 2018)]
[Proposed Rules]
[Pages 22883-22886]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-10495]

 ========================================================================
 Proposed Rules
                                                 Federal Register
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 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
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  Federal Register / Vol. 83, No. 96 / Thursday, May 17, 2018 / 
Proposed Rules  

[[Page 22883]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0439; Product Identifier 2016-SW-074-AD]
RIN 2120-AA64

Airworthiness Directives; Sikorsky Aircraft Corporation

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to supersede airworthiness directive (AD) 2017-14-
03 for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A 
helicopters. AD 2017-14-03 requires an inspection and reduces the 
retirement lives of certain landing gear components. This proposed AD 
would retain the requirements of AD 2017-14-03, reduce the retirement 
lives of additional landing gear components, and require repeating the 
inspection. The actions of this proposed AD are intended to prevent an 
unsafe condition on these products.

DATES: We must receive comments on this proposed AD by July 16, 2018.

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-2018-
0439; or in person at Docket Operations 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 Docket Operations (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: [email protected]. You may review 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: Dorie Resnik, Aviation Safety 
Engineer, Boston ACO Branch, Compliance and Airworthiness Division, 
1200 District Avenue, Burlington, Massachusetts 01803; telephone (781) 
238-7693; email [email protected].

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 issued AD 2017-14-03, Amendment 39-18947 (82 FR 34838, July 27, 
2017), for Sikorsky Model S-92A helicopters. AD 2017-14-03 was prompted 
by Sikorsky's updated fatigue analysis of the nose and main landing 
gear, which revealed that certain components require a reduced service 
life. Therefore, AD 2017-14-03 requires reducing the retirement lives 
of main landing gear (MLG) wheel axle part number (P/N) 2392-2334-001, 
MLG and nose landing gear (NLG) threaded hinge pin P/N 2392-2311-003, 
NLG cylinder P/N 2392-4006-005, NLG hinge pin P/N 2392-4312-003, and 
landing gear actuator rod end P/N 2392-0876-901. AD 2017-14-03 also 
requires a one-time visual and ultrasonic inspection of NLG airframe 
fitting assembly P/N 92209-01101-041 once it has accumulated 31,600 
landing cycles. Those actions are intended to detect and prevent cracks 
or failure of any landing gear component, which could result in damage 
and loss of control of the helicopter.
    When we issued AD 2017-14-03, we determined it would be an interim 
action. Because Sikorsky's updated airworthiness limitations schedule 
included a repetitive inspection of the NLG airframe fitting assemblies 
P/N 92209-01101-041 every 1,989 landing cycles, we determined that the 
planned compliance time for these inspections would allow enough time 
to provide notice and opportunity for prior public comment on the 
merits of the repetitive inspection. Also, the reduced retirement lives 
for MLG cylinder P/N 2392-2006-005, MLG pin outboard P/N 2392-2312-003, 
MLG bulkhead left-hand side (LHS) P/N 92201-08111-105, -107, and -109, 
and MLG bulkhead right-hand side (RHS) P/N 92201-08111-106, -108, and -
110 were not included in AD 2017-14-03. We determined the age of the 
existing Model S-92A fleet would also allow enough time to provide 
notice and opportunity for public comment on the merits of the reduced 
life limits. This proposed AD would require these inspections and 
reduced life limits.

[[Page 22884]]

FAA's Determination

    We are proposing this AD because we evaluated all the relevant 
information and determined the unsafe condition described previously is 
likely to exist or develop in other products of the same type design.

Related Service Information Under 1 CFR Part 51

    We reviewed Ultrasonic Inspection Technique No. UT 5077, Revision 
0, dated July 25, 2014 (UT 5077). UT 5077 contains the inspection 
method, equipment and materials, calibration, and inspection procedure 
for performing an ultrasonic inspection of nose gear actuator fitting 
P/N 92209-01101-101.
    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.

 Other Related Service Information

    We also reviewed Sikorsky S-92 Helicopter Alert Service Bulletin 
92-32-004, Basic Issue, dated January 30, 2015 (ASB). The ASB describes 
procedures for conducting a visual inspection of the NLG airframe 
fitting assembly and an ultrasonic inspection by following the 
procedures in UT 5077.

 Proposed AD Requirements

    This proposed AD would require removing the following components 
from service:
     Any MLG wheel axle P/N 2392-2334-001 that has 22,300 or 
more landing cycles.
     Any MLG or NLG threaded hinge pin P/N 2392-2311-003 that 
has 26,100 or more landing cycles.
     Any NLG cylinder P/N 2392-4006-005 that has 26,300 or more 
landing cycles.
     Any NLG hinge pin P/N 2392-4312-003 that has 26,700 or 
more landing cycles.
     Any landing gear actuator rod end P/N 2392-0876-901 that 
has 41,700 or more landing cycles.
     Any MLG cylinder P/N 2392-2006-005 that has 76,300 or more 
landing cycles.
     Any MLG pin outboard P/N 2392-2312-003 that has 50,300 or 
more landing cycles.
     Any MLG bulkhead LHS P/N 92201-08111-105, -107, and -109 
that has 58,400 or more landing cycles.
     Any MLG bulkhead RHS P/N 92201-08111-106, -108, and -110 
that has 58,400 or more landing cycles.
    For helicopters that have 31,600 or more landing cycles and an NLG 
airframe fitting assembly P/N 92209-01101-041 installed, this proposed 
AD would also require, before further flight and thereafter at 
intervals not exceeding 1,989 landing cycles:
     Using a 10X or higher power magnifying glass, inspecting 
each bushing and all visible surfaces of mating lug fittings adjacent 
to each bushing for fretting, corrosion, wear, and scratches.
     Replacing the NLG airframe fitting assembly before further 
flight if there is fretting, corrosion, wear, or a scratch more than 
0.0005 inch deep.
     Ultrasonic inspecting the NLG actuator fitting and 
replacing the NLG actuator fitting before further flight if there are 
any anomalies.

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:
     Replacing a wheel axle P/N 2392-2334-001 would require 2 
work-hours and required parts cost $22,000, for a cost per helicopter 
of $22,170.
     Replacing a MLG or NLG threaded hinge pin P/N 2392-2311-
003 would require 1 work-hour and required parts cost $3,800, for a 
cost per helicopter of $3,885.
     Replacing a NLG cylinder P/N 2392-4006-005 would require 1 
work-hour and required parts cost $27,200, for a cost per helicopter of 
$27,285.
     Replacing a NLG hinge pin P/N 2392-4312-003 would require 
1 work-hour and required parts cost $4,400, for a cost per helicopter 
of $4,485.
     Replacing a landing gear actuator rod end P/N 2392-0876-
901 would require 1 work-hour and required parts cost $900, for a cost 
per helicopter of $985.
     Replacing a MLG cylinder P/N 2392-2006-005 would require 2 
work-hours and required parts cost $33,100, for a cost per helicopter 
of $33,270.
     Replacing a MLG pin outboard P/N 2392-2312-003 would 
require 1 work-hour and required parts cost $4,300, for a cost per 
helicopter of $4,385.
     Replacing a MLG bulkhead LHS P/N 92201-08111-105, -107, 
and -109 would require 70 work-hours and required parts would cost 
$12,550, for a cost per helicopter of $18,500.
     Replacing a MLG bulkhead RHS P/N 92201-08111-106, -108, 
and -110 would require 70 work-hours and required parts would cost 
$12,550, for a cost per helicopter of $18,500.
     Inspecting the NLG airframe fitting assembly P/N 92209-
01101-041 would require 8 work-hours, and required parts cost is 
minimal, for a cost of $680 per helicopter and $54,400 for the U.S. 
fleet, per inspection cycle.
     If required, replacing a NLG actuator fitting P/N 92209-
01101-101 would require 70 work-hours, and required parts cost $10,000, 
for a cost per helicopter of $15,950.

 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.

[[Page 22885]]

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 removing Airworthiness Directive (AD) 
2017-14-03, Amendment 39-18947 (82 FR 34838, July 27, 2017) and adding 
the following new AD:

Sikorsky Aircraft Corporation (Sikorsky): Docket No. FAA-2018-0439; 
Product Identifier 2017-SW-074-AD.

(a) Applicability

    This AD applies to Sikorsky Model S-92A helicopters, 
certificated in any category.

(b) Unsafe Condition

    This AD defines the unsafe condition as fatigue failure of the 
landing gear. This condition could result in failure of the landing 
gear and subsequent damage to and loss of control of the helicopter.

(c) Affected ADs

    This AD replaces AD 2017-14-03, Amendment 39-18947 (82 FR 34838, 
July 27, 2017).

(d) Comments Due Date

    We must receive comments by July 16, 2018.

(e) 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.

 (f) Required Actions

    (1) Before further flight, remove from service any part that has 
accumulated the number of landing cycles listed in Table 1 to 
paragraph (f)(1) of this AD. Thereafter, remove from service any 
part before accumulating the number of landing cycles listed in 
Table 1 to paragraph (f)(1) of this AD. For purposes of this AD, a 
landing cycle is counted anytime the helicopter lifts off into the 
air and then lands again regardless of the duration of the landing 
and regardless of whether the engine is shut down. If the number of 
landing cycles in unknown, multiply the number of hours time-in-
service by 4.5 to determine the number of landing cycles.
[GRAPHIC] [TIFF OMITTED] TP17MY18.007

    (2) For helicopters with 31,600 or more landing cycles and an 
NLG airframe fitting assembly P/N 92209-01101-041 installed, before 
further flight and thereafter at intervals not to exceed 1,989 
landing cycles:
    (i) Using a 10X or higher power magnifying glass, inspect each 
bushing (P/N 92209-01101-102 and P/N 92209-01101-103) and all 
visible surfaces of mating lug fittings adjacent to each bushing for 
fretting, corrosion, wear, and scratches. If there is fretting, 
corrosion, wear, or a scratch more than 0.0005 inch deep, replace 
the NLG airframe fitting assembly before further flight.
    (ii) Ultrasonic inspect each NLG actuator fitting P/N 92209-
01101-101 in accordance with Sikorsky Ultrasonic Inspection 
Technique No. UT 5077, Revision 0, dated July 25, 2014 (UT 5077), 
except you are not required to report to or contact Sikorsky. If 
there are any anomalies or suspect indications, replace the NLG 
actuator fitting before further flight.

    Note 1 to paragraph (f)(2)(ii) of this AD:  A copy of UT 5077 is 
attached to Sikorsky S-92 Helicopter Alert Service Bulletin 92-32-
004, Basic Issue, dated January 30, 2015.

(g) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, Boston ACO Branch, FAA, may approve AMOCs for 
this AD. Send your proposal to: Dorie Resnik, Aviation Safety 
Engineer, Boston ACO Branch, Compliance and Airworthiness Division, 
1200 District Avenue, Burlington, Massachusetts 01803; telephone 
(781) 238-7693; email [email protected].
    (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.

(h) Additional Information

    Sikorsky S-92 Helicopter Alert Service Bulletin 92-32-004, Basic 
Issue, dated January 30, 2015, which is not incorporated by 
reference, contains additional information about the subject of this 
AD. For service

[[Page 22886]]

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: 
[email protected]. 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.

(i) Subject

    Joint Aircraft Service Component (JASC) Code: 3200 Main Landing 
Gear and 3220 Nose Landing Gear.

    Issued in Fort Worth, Texas, on May 9, 2018.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2018-10495 Filed 5-16-18; 8:45 am]
 BILLING CODE 4910-13-P