Federal Register / Vol. 79, No. 105 / Monday, June 2, 2014 / Proposed Rules 31231 

Group, Rotorcraft Directorate, FAA, 2601 

Meacham Blvd., Fort Worth, Texas 76137; 

telephone (817) 222–5110; email 

rao.edupuganti@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) Eurocopter Service Bulletin (SB) No. 

EC225–05–027 and SB No. AS332–05.00.92, 

both Revision 1 and dated July 17, 2013; 

Eurocopter SB No. AS332–29.00.17 and SB 

No. EC225–29–005, both Revision 0 and both 

dated June 21, 2013; and Eurocopter 

Information Notice No. 2506–I–29, Revision 

2, dated July 24, 2013; which are not 

incorporated by reference, contain additional 

information about the subject of this AD. For 

service information identified in this AD, 

contact Airbus Helicopters, Inc., 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, 2601 

Meacham Blvd., Room 663, Fort Worth, 

Texas 76137. 

(2) The subject of this AD is addressed in 

the European Aviation Safety Agency (EASA) 

AD No. 2013–0069, dated March 18, 2013. 

You may view the EASA AD on the Internet 

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

FAA–2014–0333. 

(h) Subject 

Joint Aircraft Service Component (JASC) 

Code: 2910, Main Hydraulic System. 

Issued in Fort Worth, Texas, on May 21, 

2014. 

Lance T. Gant, 

Acting Directorate Manager, Rotorcraft 

Directorate, Aircraft Certification Service. 

[FR Doc. 2014–12740 Filed 5–30–14; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2014–0335; Directorate 

Identifier 2013–SW–021–AD] 

RIN 2120–AA64 

Airworthiness Directives; Sikorsky 

Aircraft Corporation (Sikorsky) 

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 Model S–76A, S–76B, and S– 

76C helicopters with a main gearbox 

(MGB) installed that has undergone 

certain repairs. This proposed AD 

would require inspecting the MGB 

lower housing jet bores for leaks, paint 

or caulk blistering, and liner protrusion. 

This proposed AD is prompted by 

several reports of MGB low oil pressure 

warnings which were determined to be 

the result of unsecured jet bore liners 

that had protruded. The proposed 

actions are intended to prevent failure 

of the MGB from loss of oil, which 

could result in subsequent loss of 

control of the helicopter. 

DATES: We must receive comments on 

this proposed AD by August 1, 2014. 

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 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 AD, contact Sikorsky 

Aircraft Corporation, Customer Service 

Engineering, 124 Quarry Road, 

Trumbull, CT 06611; telephone 1–800– 

Winged–S or 203–416–4299; email 

sikorskywcs@sikorsky.com. You may 

review the referenced service 

information at the FAA, Office of the 

Regional Counsel, Southwest Region, 

2601 Meacham Blvd., Room 663, Fort 

Worth, Texas 76137. 

FOR FURTHER INFORMATION CONTACT: 

Jeffrey Lee, Aviation Safety Engineer, 

Boston Aircraft Certification Office, 

Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, 

Massachusetts 01803; telephone (781) 

238–7161; email jeffrey.lee@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 have received four reports of 

protruding jet bore liners on Sikorsky S– 

76 helicopters with a MGB, part number 

(P/N) 76351–09000 series, 76351–09500 

series, and 76351–09600 series, that 

have been repaired in accordance with 

Sikorsky Overhaul and Repair 

Instruction (ORI) No. 76350–065, 

Revisions A through E. Two of the 

protruding liners were discovered 

following low MGB oil pressure 

warnings, and two were discovered on 

the same MGB during maintenance. 

Subsequent investigation revealed that 

during an overhaul of the MGB, the jet 

bore liner retaining pins were not 

adequately drilled into the liner, 

allowing the jet bore liner to move in 

the housing. The investigation 

determined that the ORI instructions 

did not adequately describe procedures 

and housing wall thickness limitations 

for installing the retaining pins. 

Movement of the jet bore liner into the 

housing allows oil to leak between the 

liner and the housing, possibly resulting 

in loss of oil in the MGB, which could 

result in failure of the MGB and 

subsequent loss of control of the 


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31232 Federal Register / Vol. 79, No. 105 / Monday, June 2, 2014 / Proposed Rules 

helicopter. Sikorksy ORI No. 76350– 

065, Revision F, dated May 10, 2012 

(ORI 76350–065F), resolves this 

condition by clarifying the wall 

thickness limitations, specifying 

additional retaining pins for some jet 

bores, and providing additional 

information to perform the repair 

procedures. 

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 products of 

these same type designs. 

Related Service Information 

Sikorsky has issued Alert Service 

Bulletin (ASB) 76–66–50 Basic Issue, 

dated January 14, 2013 (ASB 76–66–50) 

for Model S–76A, S–76B, and S–76C 

helicopters with an MGB P/N 76351– 

09000 series, 76351–09500 series, and 

76351–09600 series, which have been 

repaired in accordance with ORI 

number 76350–065. An MGB that has 

been repaired in accordance with ORI 

number 76350–065 may be marked TS– 

065–II, TS–065–IIA, TS–065–2, or TS– 

065–2A, depending on the ORI revision 

used. ASB 76–66–50 describes 

procedures for inspecting each MGB 

lower housing jet bore for leaking oil, 

paint or caulk blistering, and liner 

protrusion. If there is any liner 

protrusion or leaking oil between the 

liner and the housing, the ASB requires 

replacing the MGB. If there is paint or 

caulk blistering, the ASB requires 

further inspecting for leaking oil by 

replacing the jet bore packing, 

performing a ground run of the main 

rotor for 30 minutes, and re-inspecting 

the jet bore for leaking oil. 

Sikorsky ORI 76350–065F describes 

procedures for repairing the retaining 

ring groove areas of the MGB jet bores. 

ORI 76350–065F also contains clarified 

housing wall thickness limits for 

installing jet bore liners and procedures 

for installing additional retaining pins 

in the jet bore liners. 

Proposed AD Requirements 

This proposed AD would require, 

within 50 hours time-in-service (TIS), 

compliance with the inspection 

requirements of the manufacturer’s 

service bulletin. If there is oil leakage or 

protrusion of a jet bore liner, this 

proposed AD would require replacing 

the MGB before further flight. 

Within 1,500 hours TIS, this proposed 

AD would require replacing the MGB 

with an MGB that is not subject to the 

applicability of this proposed AD unless 

it has been repaired in accordance with 

ORI 76350–065F. 

Differences Between This Proposed AD 

and the Service Information 

The ASB specifies compliance by a 

specific calendar date, while the 

compliance time in this proposed AD is 

in hours TIS. The ASB does not specify 

a terminating action for the recurring 

inspections of the MGB jet bores; the 

proposed AD would require installing 

an MGB not subject to the applicability 

of the proposed AD unless it has been 

repaired in accordance with ORI 76350– 

065F, which would be terminating 

action for the daily inspections. The 

service information also allows any 

affected MGB sent in for repair or 

overhaul to be repaired in accordance 

with ORI 76350–065 Revision B or later; 

the proposed AD would not allow 

installation of an affected MGB unless it 

has been repaired in accordance with 

ORI 76350–065F, as this revision 

incorporates the clarified instructions 

and additional retaining pin 

requirements that would provide 

terminating action for the daily 

inspections. 

Costs of Compliance 

We estimate that this proposed AD 

would affect 53 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, inspecting 

the jet bore liners would require about 

1.1 work-hours, for a cost per helicopter 

of $94 and a total cost to US operators 

of $4,982 per inspection cycle. If 

required, repairing a jet bore liner 

would require about 14 work-hours, and 

required parts would cost $200, for a 

cost per helicopter of $1,390. If 

required, replacing the MGB would 

require about 134 work-hours, and 

required parts would cost $994,000, for 

a cost per helicopter of $1,005,390. 

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 proposed 

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 

■ 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 (Sikorsky): 

Docket No. FAA–2014–0335; Directorate 

Identifier 2013–SW–021–AD. 

(a) Applicability 

This AD applies to Sikorsky Model S–76A, 

S–76B, and S–76C helicopters with a main 

gearbox (MGB) part number (P/N) 76351– 

09000 series, 76351–09500 series, and 

76351–09600 series installed that has been 


emcdonald on DSK67QTVN1PROD with PROPOSALS
Federal Register / Vol. 79, No. 105 / Monday, June 2, 2014 / Proposed Rules 31233 

repaired in accordance with Sikorsky 

Overhaul and Repair Instruction (ORI) No. 

76350–065, Revision A through Revision E, 

certificated in any category. 

(b) Unsafe Condition 

This AD defines the unsafe condition as an 

unsecured MGB lower housing jet bore liner. 

This condition may cause the liner to move 

out of place, allowing oil to leak from the 

MGB, resulting in MGB failure and 

subsequent loss of control of the helicopter. 

(c) Comments Due Date 

We must receive comments by August 1, 

2014. 

(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 Action 

(1) Within 50 hours time-in-service (TIS), 

and thereafter at intervals not to exceed 6 

hours TIS, inspect each MGB lower housing 

jet bore (jet bore), as depicted in Figures 3 

and 4 of Sikorsky S–76 Alert Service Bulletin 

76–66–50, Basic Issue, dated January 14, 

2013 (ASB 76–66–50), for liner protrusion or 

movement, paint or caulk blistering, or oil 

leakage. 

(i) If there is any liner protrusion or 

movement, before further flight, replace the 

MGB with an MGB that has not been repaired 

in accordance with Sikorsky ORI No. 76350– 

065, Revision A through Revision E, unless 

it has been subsequently repaired in 

accordance with Sikorsky ORI No. 76350– 

065, Revision F, dated May 10, 2012. 

(ii) If there is any oil leakage or paint or 

caulk blistering, inspect the jet bore for liner 

protrusion and perform a leakage check by 

following the Accomplishment Instructions, 

Paragraphs 3.C.(1) through 3.C.(6)(a), of ASB 

76–66–50. 

(iii) If any moisture or droplets of MGB oil 

are visible on a jet bore after accomplishing 

the leakage check specified in paragraph 

3.C.(6)(a) of ASB 76–66–50, repeat 

paragraphs 3.C(4) through 3.C(6) of ASB 76– 

66–50. If any moisture or droplets of MGB oil 

are still visible, before further flight, replace 

the MGB with an MGB that has not been 

repaired in accordance with Sikorsky ORI 

No. 76350–065, Revision A through Revision 

E, unless it has been subsequently repaired 

in accordance with Sikorsky ORI No. 76350– 

065, Revision F. 

(2) Within 1500 hours TIS, replace the 

MGB with an MGB that has not been repaired 

in accordance with Sikorsky ORI No. 76350– 

065, Revision A through Revision E, unless 

it has been subsequently repaired in 

accordance with Sikorsky ORI No. 76350– 

065, Revision F. This is terminating action 

for the repetitive inspections required by this 

AD. 

(f) Alternative Methods of Compliance 

(AMOC) 

(1) The Manager, Boston Aircraft 

Certification Office, FAA, may approve 

AMOCs for this AD. Send your proposal to: 

Jeffrey Lee, Aviation Safety Engineer, Boston 

Aircraft Certification Office, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, Massachusetts 

01803; telephone (781) 238–7161; email 

jeffrey.lee@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. 

(h) Additional Information 

Sikorsky Overhaul and Repair Instruction 

No. 76350–065, Revision F, dated May 10, 

2012, which is not incorporated by reference, 

contains additional information about the 

subject of this AD. You may review copies of 

information at the FAA, Office of the 

Regional Counsel, Southwest Region, 2601 

Meacham Blvd., Room 663, Fort Worth, 

Texas 76137. For information on the 

availability of this material at the FAA, call 

(817) 222–5110. 

(i) Subject 

Joint Aircraft Service Component (JASC) 

Code: 6320: Main Rotor Gearbox. 

Issued in Fort Worth, Texas, on May 21, 

2014. 

Lance T. Gant, 

Acting Directorate Manager, Rotorcraft 

Directorate, Aircraft Certification Service. 

[FR Doc. 2014–12738 Filed 5–30–14; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2014–0337; Directorate 

Identifier 2013–SW–029–AD] 

RIN 2120–AA64 

Airworthiness Directives; Various 

Restricted Category Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to supersede 

airworthiness directive (AD) 2012–14– 

11 for Arrow Falcon Exporters, Inc. 

(AFE), Rotorcraft Development 

Corporation (RDC), and San Joaquin 

Helicopters (SJH) Model OH–58A, OH– 

58A+, and OH–58C helicopters. AD 

2012–14–11 currently requires 

inspecting the main rotor mast (mast) 

for a crack. Since we issued AD 2012– 

14–11, we have determined that the area 

of the mast requiring inspection should 

be expanded and repetitive inspections 

of the mast should be accomplished. 

This proposed AD would expand the 

area of the mast that requires an 

inspection for a crack and would require 

repetitive inspections of the mast. The 

proposed actions are intended to 

prevent failure of the mast and 

subsequent loss of control of the 

helicopter. 

DATES: We must receive comments on 

this proposed AD by August 1, 2014. 

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 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 FURTHER INFORMATION CONTACT: John 

Cecil, Aviation Safety Engineer, Los 

Angeles Aircraft Certification Office, 

Transport Airplane Directorate, FAA, 

3960 Paramount Blvd., Lakewood, CA 

90712; telephone (562) 627–5228; email 

john.cecil@faa.gov; or Roger Caldwell, 

Aerospace Engineer, Denver Aircraft 

Certification Office, FAA, 26805 East 

68th Ave., Room 214, Denver, CO 

80249; telephone (303) 342–1086; email 

roger.caldwell@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 


emcdonald on DSK67QTVN1PROD with PROPOSALS