Federal Register / Vol. 82, No. 66 / Friday, April 7, 2017 / Rules and Regulations 16897 

(b) Unsafe Condition 

This AD defines the unsafe condition as a 

delaminated engine mount bushing. This 

condition could result in excessive vibration, 

which could lead to cracking and failure of 

the engine mount front support pins, and loss 

of helicopter control. 

(c) Effective Date 

This AD becomes effective May 12, 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 50 hours time-in-service (TIS) and 

thereafter at intervals not to exceed 50 hours 

TIS: 

(1) Visually inspect each engine mount 

bushing (bushing) for separation of the 

rubber from the metal or missing rubber. 

(2) If any rubber has separated from the 

metal or if there is missing rubber, inspect 

the bushing for deformation, corrosion, and 

mechanical damage. 

(i) Replace the bushing with an airworthy 

bushing if there is any deformation, 

separation of the rubber from the metal, 

corrosion, or mechanical damage, or repair 

the bushing if the deformation, separation of 

the rubber, corrosion, or mechanical damage 

is within the maximum repair damage 

limitations. 

(ii) If the inner and outer parts of the 

bushing are separated with missing rubber, 

replace the bushing with an airworthy 

bushing. 

(f) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Safety Management 

Group, FAA, may approve AMOCs for this 

AD. Send your proposal to: Matt Fuller, 

Senior Aviation Safety Engineer, Safety 

Management Group, Rotorcraft Directorate, 

FAA, 10101 Hillwood Pkwy., Fort Worth, TX 

76177; telephone (817) 222–5110; email 9- 

ASW-FTW-AMOC-Requests@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 

(1) Airbus Helicopters Alert Service 

Bulletin ASB MBB–BK117 D–2–71A–002, 

Revision 0, dated September 28, 2015, which 

is not incorporated by reference, contains 

additional information about the subject of 

this AD. For service information identified in 

AD, contact Airbus Helicopters, 2701 N. 

Forum Drive, Grand Prairie, TX 75052; 

telephone (972) 641–0000 or (800) 232–0323; 

fax (972) 641–3775; or at http://

www.airbushelicopters.com/techpub. 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. 

(2) The subject of this AD is addressed in 

European Aviation Safety Agency (EASA) AD 

No. 2015–0198, dated September 30, 2015. 

You may view the EASA AD on the Internet 

at http://www.regulations.gov in Docket No. 

FAA–2016–3257. 

(h) Subject 

Joint Aircraft Service Component (JASC) 

Code: 7200, Engine (Turbine, Turboprop). 

Issued in Fort Worth, Texas, on March 29, 

2017. 

Scott A. Horn, 

Acting Manager, Rotorcraft Directorate, 

Aircraft Certification Service. 

[FR Doc. 2017–06706 Filed 4–6–17; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–7095; Directorate 

Identifier 2015–SW–085–AD; Amendment 

39–18848; AD 2017–07–09] 

RIN 2120–AA64 

Airworthiness Directives; Sikorsky 

Aircraft Corporation Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for 

Sikorsky Aircraft Corporation (Sikorsky) 

Model S–92A helicopters. This AD 

requires removing from service the tail 

gearbox center housing (housing) when 

it has 12,200 or more hours time-inservice (TIS). This AD was prompted by 

fatigue analysis conducted by Sikorsky 

that determined the housing required a 

retirement life. The actions are intended 

to prevent an unsafe condition on these 

products. 

DATES: This AD is effective May 12, 

2017. 

ADDRESSES: 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 a copy of the referenced 

service information at the FAA, Office 

of the Regional Counsel, Southwest 

Region, 10101 Hillwood Pkwy., Room 

6N–321, Fort Worth, TX 76177. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

7095; 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 (phone: 

800–647–5527) is U.S. Department of 

Transportation, Docket Operations 

Office, M–30, West Building Ground 

Floor, Room W12–140, 1200 New Jersey 

Avenue SE., Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Kristopher Greer, Aerospace Engineer, 

Boston Aircraft Certification Office, 

Engine & Propeller Directorate, FAA, 

1200 District Avenue, Burlington, 

Massachusetts 01803; telephone 781– 

238–7799; email Kristopher.Greer@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

On August 30, 2016, at 81 FR 59526, 

the Federal Register published our 

notice of proposed rulemaking (NPRM), 

which proposed to amend 14 CFR part 

39 by adding an AD that would apply 

to Sikorsky Model S–92A helicopters 

with a housing part number (P/N) 

92358–06107–043 installed. The NPRM 

proposed to require removing from 

service any housing with 12,200 or more 

hours TIS. The NPRM was prompted by 

fatigue analysis conducted by Sikorsky 

that determined the housing required a 

retirement life. The proposed actions 

were intended to prevent a crack in the 

housing, which could lead to loss of tail 

rotor drive and loss of helicopter 

control. 

Comments 

After our NPRM was published, we 

received a comment from Sikorsky. 

Request 

Sikorsky requested a minimum 45- 

day extension of the comment period. In 

support of this request, Sikorsky stated 

it is re-evaluating the housing’s 12,200- 

hour life limit due to an error in the 

measured flight test loads used in the 

structural fatigue substantiation. When 

asked for additional information, 

Sikorsky advised that it had completed 

its re-evaluation and determined that 

the 12,200-hour life limit was, in fact, 

correct. 

FAA’s Determination 

We have reviewed the relevant 

information and determined that an 

unsafe condition exists and is likely to 

exist or develop on other products of 


nlaroche on DSK30NT082PROD with RULES
16898 Federal Register / Vol. 82, No. 66 / Friday, April 7, 2017 / Rules and Regulations 

these same type designs and that air 

safety and the public interest require 

adopting the AD requirements as 

proposed. 

Related Service Information 

We reviewed Sikorsky S–92 

Maintenance Manual 4–00–00, 

Temporary Revision No. 4–49, dated 

April 10, 2015, which establishes a 

replacement interval of 12,200 hours for 

housing, P/N 92358–06107–043. 

Costs of Compliance 

We estimate that this AD affects 80 

helicopters of U.S. Registry and that 

labor costs average $85 per work hour. 

Based on these estimates, we expect the 

following costs. 

Replacing the housing requires 24 

work-hours, and parts cost $58,000 for 

a total cost of $60,040 per helicopter. 

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 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify 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 

■ 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): 

2017–07–09 Sikorsky Aircraft Corporation: 

Amendment 39–18848; Docket No. 

FAA–2015–7095; Directorate Identifier 

2015–SW–085–AD. 

(a) Applicability 

This AD applies to Sikorsky Aircraft 

Corporation (Sikorsky) Model S–92A 

helicopters, certificated in any category, with 

a tail gearbox center housing, part number 

(P/N) 92358–06107–043, installed. 

(b) Unsafe Condition 

This AD defines the unsafe condition as a 

crack in a tail gearbox center housing. This 

condition could result in failure of the tail 

rotor drive and consequently loss of 

helicopter control. 

(c) Effective Date 

This AD becomes effective May 12, 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 

Before further flight, remove from service 

any tail gearbox housing, P/N 92358–06107– 

043, that has 12,200 or more hours time-inservice. 

(f) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Boston Aircraft 

Certification Office, FAA, may approve 

AMOCs for this AD. Send your proposal to: 

Kristopher Greer, aerospace engineer, Boston 

Aircraft Certification Office, Engine & 

Propeller Directorate, FAA, 1200 District 

Avenue, Burlington, Massachusetts 01803; 

telephone 781–238–7799; email 

Kristopher.Greer@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 S–92 Maintenance Manual 4–00– 

00, Temporary Revision No. 4–49, dated 

April 10, 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 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: 6520, Tail Rotor Gearbox. 

Issued in Fort Worth, Texas, on March 29, 

2017. 

Scott A. Horn, 

Acting Manager, Rotorcraft Directorate, 

Aircraft Certification Service. 

[FR Doc. 2017–06708 Filed 4–6–17; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2016–9102; Airspace 

Docket No. 16–AEA–6] 

Amendment of Class E Airspace; 

Monongahela, PA 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: This action amends Class E 

airspace at Monongahela, PA, as the 

Allegheny VHF Omnidirectional Radio 

Range (VOR) has been decommissioned, 

requiring airspace reconfiguration at 

Rostraver Airport. This action enhances 

the safety and airspace management of 

Instrument Flight Rules (IFR) operations 

at the airport. 

DATES: Effective 0901 UTC, June 22, 

2017. The Director of the Federal 

Register approves this incorporation by 

reference action under Title 1, Code of 

Federal Regulations, part 51, subject to 

the annual revision of FAA Order 

7400.11 and publication of conforming 

amendments. 


nlaroche on DSK30NT082PROD with RULES