32198 Federal Register / Vol. 83, No. 134 / Thursday, July 12, 2018 / Rules and Regulations 

Dated: July 9, 2018. 

Bruce Summers, 

Administrator, Agricultural Marketing 

Service. 

[FR Doc. 2018–14939 Filed 7–11–18; 8:45 am] 

BILLING CODE 3410–02–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2018–0588; Product 

Identifier 2017–NM–105–AD; Amendment 

39–19328; AD 2018–14–08] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 777–200LR 

series airplanes. This AD requires 

revising certain documents to provide 

revised operating limitations. For 

certain airplanes, modification of the 

water and fuel scavenge systems in the 

fuel tanks, electrical changes in the 

main equipment center, and installation 

of new electrical load management 

system (ELMS2) software is an 

acceptable alternative to the documents 

revision. This AD was prompted by 

reports of unreliable performance of the 

water and fuel scavenge systems. We are 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective July 27, 

2018. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of July 27, 2018. 

We must receive comments on this 

AD by August 27, 2018. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE, Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this final rule, contact Boeing 

Commercial Airplanes, Attention: 

Contractual & Data Services (C&DS), 

2600 Westminster Blvd., MC 110–SK57, 

Seal Beach, CA 90740–5600; telephone 

562–797–1717; internet https://

www.myboeingfleet.com. You may view 

this service information at the FAA, 

Transport Standards Branch, 2200 

South 216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

It is also available on the internet at 

http://www.regulations.gov by searching 

for and locating Docket No. FAA–2018– 

0588. 

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– 

0588; or in person at the Docket 

Management Facility between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this final rule, the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Office (phone: 800–647– 

5527) is in the ADDRESSES section. 

Comments will be available in the AD 

docket shortly after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Kevin Nguyen, Aerospace Engineer, 

Propulsion Section, FAA, Seattle ACO 

Branch, 2200 South 216th St., Des 

Moines, WA 98198; phone and fax: 206– 

231–3555; email: Kevin.Nguyen@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

Operators have reported unreliable 

performance of the water and fuel 

scavenge systems. During flight, any 

water in the fuel can sink to the bottom 

of the fuel tank. This water can enter the 

fuel scavenge inlets and can then freeze 

as it travels from the body center fuel 

tank into the colder fuel scavenge tubes 

in the left and right cheek center fuel 

tanks (outboard of the side of body ribs). 

The frozen water can restrict the flow of 

scavenge fuel from the center fuel tank 

to the main fuel tanks, causing the fuel 

flow to decrease or stop. When this 

occurs, as much as 700 pounds of fuel 

can remain unavailable during flight. If 

the flightcrew is not aware that this fuel 

is unavailable and the fuel quantity 

decreases to the quantity of the 

unavailable fuel, then fuel exhaustion 

will occur, which could lead to 

subsequent power loss of all engines 

due to loss of capability to scavenge fuel 

in the center fuel tank. 

Related Rulemaking 

We issued AD 2016–11–03, 

Amendment 39–18530 (81 FR 34867, 

June 1, 2016) (‘‘AD 2016–11–03’’), that 

applied to certain Boeing Model 777– 

200LR series airplanes equipped with or 

without auxiliary fuel tanks. For 

airplanes with auxiliary fuel tanks, 

variable numbers WD049–WD053 

inclusive only, AD 2016–11–03 requires 

modification of the water and fuel 

scavenge systems after removal of the 

auxiliary fuel tanks. This AD requires 

incorporation of revised operating 

limitations for those airplanes, which 

terminates the associated requirements 

of AD 2016–11–03. This AD also 

provides the option of modifying the 

water and fuel scavenge systems in the 

fuel tanks, making electrical changes in 

the main equipment center, and 

installing new ELMS2 software after 

removal of the auxiliary fuel tanks. 

Either compliance method terminates 

the requirements of paragraphs (g), (h), 

and (i) of AD 2016–11–03 for those 

airplanes. 

Additionally, paragraph (g) of this AD 

requires a revision to certain documents 

to provide revised operating limitations 

for airplane variable numbers WD011 

through WD015 inclusive and WD016 

through WD018 inclusive. These 

airplanes are not affected by AD 2016– 

11–03, which refers to Boeing Special 

Attention Service Bulletin 777–28– 

0078, Revision 1, dated April 27, 2015, 

for the applicability. 

Airplane variable numbers WD011 

through WD015 inclusive are included 

in the effectivity of Boeing Special 

Attention Service Bulletin 777–28– 

0078, Revision 3, dated December 19, 

2017; therefore, this AD provides a 

modification of the water and fuel 

scavenge systems in the fuel tanks, 

electrical changes in the main 

equipment center, and installation of 

new ELMS2 software as an acceptable 

alternative to the documents revision. 

However, there is no approved service 

information for airplane variable 

numbers WD016 through WD018 

inclusive for the modification of the 

water and fuel scavenge systems in the 

fuel tanks, electrical changes in the 

main equipment center, and installation 

of new ELMS2 software; therefore, there 

is no alternative to the documents 

revision specified in this AD for these 

airplanes. 

Related Service Information Under 

1 CFR Part 51 

We reviewed Boeing Special 

Attention Service Bulletin 777–28– 

0078, Revision 3, dated December 19, 

2017. The service information describes 


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Federal Register / Vol. 83, No. 134 / Thursday, July 12, 2018 / Rules and Regulations 32199 

procedures for the removal of the 

auxiliary fuel tanks and modification of 

the water and fuel scavenge systems in 

the fuel tanks, electrical changes in the 

main equipment center, and installation 

of new ELMS2 software. 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. 

FAA’s Determination 

We are issuing 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. 

AD Requirements 

This AD requires revising certain 

documents to provide revised operating 

limitations. For certain airplanes, this 

AD provides for the optional 

accomplishment of the actions specified 

in the service information described 

previously, as an acceptable alternative 

to the documents revision. 

FAA’s Justification and Determination 

of the Effective Date 

There are currently no domestic 

operators of this product. Therefore, we 

find that notice and opportunity for 

prior public comment are unnecessary 

and that good cause exists for making 

this amendment effective in less than 30 

days. 

Comments Invited 

This AD is a final rule that involves 

requirements affecting flight safety and 

was not preceded by notice and an 

opportunity for public comment. 

However, we invite you to send any 

written data, views, or arguments about 

this final rule. Send your comments to 

an address listed under the ADDRESSES

section. Include the docket number 

FAA–2018–0588 and Product Identifier 

2017–NM–105–AD at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this final rule. We will 

consider all comments received by the 

closing date and may amend this final 

rule because of those comments. 

We will post all comments we 

receive, without change, to http://

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this final rule. 

Costs of Compliance 

Currently, there are no affected U.S.- 

registered airplanes. If an affected 

airplane is imported and placed on the 

U.S. Register in the future, we provide 

the following cost estimates to comply 

with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Action Labor cost Parts cost Cost per 

product 

Revise operating limitations ......................................... 1 work-hour × $85 per hour = $85 ............................... $0 $85 

ESTIMATED COSTS FOR OPTIONAL ACTIONS

Action Labor cost Parts cost Cost per 

product 

Modification ................................................................. Up to 253 work-hours × $85 per hour = up to 

$21,505.

$66,960 Up to $88,465. 

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. 

This AD is issued in accordance with 

authority delegated by the Executive 

Director, Aircraft Certification Service, 

as authorized by FAA Order 8000.51C. 

In accordance with that order, issuance 

of ADs is normally a function of the 

Compliance and Airworthiness 

Division, but during this transition 

period, the Executive Director has 

delegated the authority to issue ADs 

applicable to transport category 

airplanes to the Director of the System 

Oversight Division. 

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, 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. 

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. 


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32200 Federal Register / Vol. 83, No. 134 / Thursday, July 12, 2018 / Rules and Regulations 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive (AD): 

2018–14–08 The Boeing Company: 

Amendment 39–19328; Docket No. 

FAA–2018–0588; Product Identifier 

2017–NM–105–AD. 

(a) Effective Date 

This AD is effective July 27, 2018. 

(b) Affected ADs 

This new AD affects AD 2016–11–03, 

Amendment 39–18530 (81 FR 34867, June 1, 

2016) (‘‘AD 2016–11–03’’). 

(c) Applicability 

This AD applies to The Boeing Company 

Model 777–200LR series airplanes, 

certificated in any category, variable numbers 

(V/Ns) WD011 through WD015 inclusive, 

WD016 through WD018 inclusive, and 

WD049 through WD053 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 28, Fuel. 

(e) Unsafe Condition 

This AD was prompted by reports of 

unreliable performance of the water and fuel 

scavenge systems. We are issuing this AD to 

prevent fuel exhaustion and subsequent 

power loss of all engines due to loss of access 

to fuel in the center fuel tank. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Revision to Operating Limitations 

Except as provided by paragraph (h) of this 

AD: Within 36 months after the effective date 

of this AD, revise the applicable section of 

the documents specified in paragraphs (g)(1) 

and (g)(2) of this AD to include the 

information specified in figure 1 to the 

introductory text of paragraph (g) of this AD. 

(1) Insert the information specified in 

figure 1 to the introductory text of paragraph 

(g) of this AD into the ‘‘Fuel-System— 

Loading’’ section of the ‘‘Certificate 

Limitations’’ section of the FAA-approved 

Boeing Model 777 Airplane Flight Manual. 

(2) Insert the information specified in 

figure 1 to the introductory text of paragraph 

(g) of this AD into the ‘‘Loading Limitations’’ 

section of the ‘‘Fuel Loading Procedures’’ 

section of the ‘‘Fuel Management’’ section of 

the FAA-approved Boeing Model 777 Weight 

and Balance Control and Loading Manual. 

(h) Optional Terminating Action for V/Ns 

WD049–WD053 Inclusive and WD011– 

WD015 Inclusive 

For airplane V/Ns WD049 through WD053 

inclusive, and WD011 through WD015 

inclusive: Accomplishment of the actions 

specified in paragraphs (h)(1) and (h)(2) of 

this AD terminates the requirements of 

paragraph (g) of this AD. 

(1) Remove the auxiliary fuel tanks in 

accordance with step 1. of the 

Accomplishment Instructions of Boeing 

Special Attention Service Bulletin 777–28– 

0078, Revision 3, dated December 19, 2017. 

(2) Modify the water and fuel scavenge 

systems in the fuel tanks, make electrical 

changes in the main equipment center, and 

install new electrical load management 

system (ELMS2) software, by doing all 

applicable actions identified as ‘‘RC’’ 

(required for compliance) in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 777–28–0078, Revision 3, 

dated December 19, 2017. 

(i) Credit for Previous Actions 

(1) This paragraph provides credit for the 

actions specified in paragraphs (h)(1) and 

(h)(2) of this AD, if those actions were 

performed before the effective date of this AD 

using Boeing Special Attention Service 

Bulletin 777–28–0078, Revision 2, dated 

October 5, 2016. 

(2) This paragraph provides credit for 

airplane V/Ns WD049 through WD053 

inclusive for the actions specified in 

paragraphs (h)(1) and (h)(2) of this AD, if 

those actions were performed before the 

effective date of this AD using April 27, 2015; 

or Boeing Special Attention Service Bulletin 

777–28–0078, Revision 1, dated April 27, 

2015. 

(j) Parts Installation Prohibition 

After completion of the actions specified in 

paragraph (h) of this AD, no person may 

install an auxiliary fuel tank on that airplane. 

(k) Terminating Action for AD 2016–11–03 

for V/Ns WD049–WD053 Inclusive 

Accomplishment of the actions required by 

paragraph (g) or (h) of this AD terminates the 

requirements of paragraphs (g), (h), and (i) of 

AD 2016–11–03 for that airplane, V/Ns 

WD049 through WD053 inclusive only. 

(l) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle ACO Branch, 

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 

certification office, send it to the attention of 

the person identified in paragraph (m) of this 

AD. Information may be emailed to 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) 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. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by the Boeing 

Commercial Airplanes Organization 

Designation Authorization (ODA) that has 

been authorized by the Manager, Seattle ACO 

Branch, FAA, to make those findings. To be 

approved, the repair method, modification 

deviation, or alteration deviation must meet 

the certification basis of the airplane, and the 

approval must specifically refer to this AD. 

(4) For service information that contains 

steps that are labeled as Required for 

Compliance (RC), the provisions of 

paragraphs (l)(4)(i) and (l)(4)(ii) of this AD 

apply. 

(i) The steps labeled as RC, including 

substeps under an RC step and any figures 

identified in an RC step, must be done to 

comply with the AD. If a step or substep is 

labeled ‘‘RC Exempt,’’ then the RC 

requirement is removed from that step or 

substep. An AMOC is required for any 

deviations to RC steps, including substeps 

and identified figures. 

(ii) Steps not labeled as RC may be 

deviated from using accepted methods in 

accordance with the operator’s maintenance 

or inspection program without obtaining 

approval of an AMOC, provided the RC steps, 

including substeps and identified figures, can 

still be done as specified, and the airplane 

can be put back in an airworthy condition. 

(m) Related Information 

For more information about this AD, 

contact Kevin Nguyen, Aerospace Engineer, 

Propulsion Section, FAA, Seattle ACO 

Branch, 2200 South 216th St., Des Moines, 

WA 98198; phone and fax: 206–231–3555; 

email: Kevin.Nguyen@faa.gov. 


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Federal Register / Vol. 83, No. 134 / Thursday, July 12, 2018 / Rules and Regulations 32201 

(n) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Boeing Special Attention Service 

Bulletin 777–28–0078, Revision 3, dated 

December 19, 2017. 

(ii) Reserved. 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; internet https://

www.myboeingfleet.com. 

(4) You may view this service information 

at the FAA, Transport Standards Branch, 

2200 South 216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, call 

202–741–6030, or go to: http://

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued in Des Moines, Washington, on June 

29, 2018. 

Jeffrey E. Duven, 

Director, System Oversight Division, Aircraft 

Certification Service. 

[FR Doc. 2018–14702 Filed 7–11–18; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2017–0757; Product 

Identifier 2017–SW–022–AD; Amendment 

39–19327; AD 2018–14–07] 

RIN 2120–AA64 

Airworthiness Directives; Bell 

Helicopter Textron Canada Limited 

Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

serial numbered Bell Helicopter Textron 

Canada Limited (BHTC) Model 429 

helicopters. This AD requires marking a 

serial number on life-limited forward 

spars and actuator fitting assemblies. 

The actions of this AD are intended to 

prevent an unsafe condition on these 

products. 

DATES: This AD is effective August 16, 

2018. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain document listed in this AD 

as of August 16, 2018. 

ADDRESSES: For service information 

identified in this final rule, contact Bell 

Helicopter Textron Canada Limited, 

12,800 Rue de l’Avenir, Mirabel, Quebec 

J7J1R4; telephone (450) 437–2862 or 

(800) 363–8023; fax (450) 433–0272; or 

at http://www.bellcustomer.com/files/. 

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. It is also 

available on the internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2017– 

0757. 

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– 

0757; 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 AD, the 

Transport Canada Civil Aviation 

(Transport Canada) AD, any 

incorporated-by-reference service 

information, the economic evaluation, 

any comments received, and other 

information. The street address for 

Docket Operations (phone: 800–647– 

5527) is U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Helene Gandy, Aviation Safety 

Engineer, Regulations & Policy Section, 

Rotorcraft Standards Branch, FAA, 

10101 Hillwood Pkwy., Fort Worth, TX 

76177; telephone (817) 222–5413; email 

helene.gandy@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

On January 26, 2018, at 83 FR 3628, 

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 Bell Model 429 helicopters, serial 

number (S/N) 57150, 57168, 57176, 

57210 through 57216, 57265, 57266, 

57267, and 57287, with a forward spar 

part number (P/N) 429–031–213–103 or 

429–031–213–104 or actuator fitting 

assembly P/N 429–031–222–101 or 429– 

031–222–102 installed. 

The NPRM proposed to require 

marking a serial number on life-limited 

forward spars and actuator fitting 

assemblies. The proposed requirements 

were intended to prevent the forward 

spar or actuator fitting assembly from 

remaining in service after reaching its 

life limit. This condition could result in 

failure of a forward spar or actuator 

fitting assembly and subsequent 

collapse of the landing gear. 

The NPRM was prompted by AD No. 

CF–2017–02, dated January 16, 2017, 

issued by Transport Canada, which is 

the aviation authority for Canada, to 

correct an unsafe condition for Bell 

Model 429 helicopters, S/N 57150, 

57168, 57176, 57210, 57211 through 

57216, 57265, 57266, 57267, and 57287. 

Transport Canada advises that forward 

spars P/N 429–031–213–103 and 429– 

031–213–104 and actuator fitting 

assembly P/N 429–031–222–101 and 

429–031–222–102 have life limits of 

30,000 and 19,000 Retirement Index 

Numbers, respectively. However, 

Transport Canada states these parts are 

not serialized, and therefore their 

accumulated usage is difficult to track, 

which creates a risk that these parts 

could remain in service beyond their 

life limits. This condition could result 

in failure of the part. 

Comments 

We gave the public the opportunity to 

participate in developing this AD, but 

we received no comments on the NPRM. 

FAA’s Determination 

These helicopters have been approved 

by the aviation authority of Canada and 

are approved for operation in the United 

States. Pursuant to our bilateral 

agreement with Canada, Transport 

Canada, its technical representative, has 

notified us of the unsafe condition 

described in the Transport Canada AD. 

We are issuing this AD because we 

evaluated all information provided by 

Transport Canada and determined the 

unsafe condition exists and is likely to 

exist or develop on other helicopters of 

these same type designs and that air 

safety and the public interest require 

adopting the AD requirements as 

proposed. 

Differences Between This AD and the 

Transport Canada AD 

The Transport Canada AD requires 

compliance within 12 months from its 

effective date, unless already 

accomplished. This AD requires 

compliance within 800 hours time-inservice. 

Related Service Information Under 1 

CFR Part 51 

We reviewed Bell Helicopter Alert 

Service Bulletin 429–16–34, dated 

November 10, 2016, which specifies 


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