10750 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 

paragraph (i) of this AD was done before the 

effective date of this AD: 

(1) The actions specified in paragraph (g) 

of this AD are not required. 

(2) The initial accomplishment of the task 

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

AD is not required. 

(3) Task 33–51–54–603 must be done 

within 48 months after task ‘‘33–51–54–602’’ 

was accomplished, and thereafter at the 

intervals specified in task 33–51–54–603. 

(k) No Alternative Actions and Intervals 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (h) of this AD, no 

alternative actions (e.g., inspections) and 

intervals may be used unless the actions and 

intervals are approved as an alternative 

method of compliance (AMOC) in 

accordance with the procedures specified in 

paragraph (l)(1) of this AD. 

(l) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York 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 ATTN: Program Manager, 

Continuing Operational Safety, FAA, New 

York ACO Branch, 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 instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, New York ACO Branch, 

FAA; or Transport Canada Civil Aviation 

(TCCA); or Bombardier’s TCCA Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(m) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

AD CF–2020–07, dated March 17, 2020, for 

related information. This MCAI may be 

found in the AD docket on the internet at 

https://www.regulations.gov by searching for 

and locating Docket No. FAA–2020–0843. 

(2) For more information about this AD, 

contact Thomas Niczky, Aerospace Engineer, 

Avionics and Electrical Systems Section, 

FAA, New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7347; fax 516–794–5531; 

email 9-avs-nyaco-cos@faa.gov. 

(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 this AD specifies otherwise. 

(i) Bombardier Service Bulletin 700–33– 

024, dated May 13, 2019. 

(ii) Bombardier Global Express BD–700 

Supplemental Time Limits/Maintenance 

Checks (STLMC) Temporary Revision (TR) 

05–19091701, dated September 17, 2019. 

(iii) Bombardier Global Express BD–700 

STLMC TR 05–19091704, dated September 

17, 2019. 

(iv) Bombardier Global Express XRS BD– 

700 STLMC TR 05–19091705, dated 

September 17, 2019. 

(3) For service information identified in 

this AD, contact Bombardier, Inc., 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–5000; fax 514– 

855–7401; email ac.yul@

aero.bombardier.com; internet https://

www.bombardier.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety 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, 

email fedreg.legal@nara.gov, or go to: https:// 

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

Issued on January 29, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–03574 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0211; Product 

Identifier 2020–NM–006–AD; Amendment 

39–21398; AD 2021–02–15] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 747–100, 

747–100B, 747–100B SUD, 747–200B, 

747–200C, 747–200F, 747–300, 747– 

400, 747–400D, 747–400F, and 747SR 

series airplanes. This AD was prompted 

by reports of inboard foreflap departures 

from the airplane. This AD requires 

repetitive replacement of certain parts; a 

general visual inspection to determine 

production configuration for certain 

parts; a repetitive lubrication of certain 

parts and a repetitive general visual 

inspection of certain parts for any 

exuding grease; repetitive detailed 

inspections of certain parts for loose or 

missing attachment bolts, cracks or 

bushing migration, cracks or gouges, or 

broken, binding, or missing rollers; 

repetitive detailed inspections of certain 

parts for cracks or corrosion; repetitive 

lubrication; and on-condition actions if 

necessary. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective March 30, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 30, 2021. 

ADDRESSES: 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; 

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

www.myboeingfleet.com. You may view 

this service information at the FAA, 

Airworthiness Products Section, 

Operational Safety 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 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0211. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0211; 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 final rule, 

any comments received, and other 

information. The address for Docket 

Operations 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: Eric 

Lin, Aerospace Engineer, Airframe 

Section, FAA, Seattle ACO Branch, 2200 

South 216th St., Des Moines, WA 98198; 

phone and fax: 206–231–3523; email: 

eric.lin@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 10751 

Discussion 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain The Boeing Company 

Model 747–100, 747–100B, 747–100B 

SUD, 747–200B, 747–200C, 747–200F, 

747–300, 747–400, 747–400D, 747– 

400F, and 747SR series airplanes. The 

NPRM published in the Federal 

Register on May 18, 2020 (85 FR 29673). 

The NPRM was prompted by reports of 

inboard foreflap departures from the 

airplane. The NPRM proposed to require 

repetitive replacement of certain parts; a 

general visual inspection to determine 

production configuration for certain 

parts; a repetitive lubrication of certain 

parts and a repetitive general visual 

inspection of certain parts for any 

exuding grease; repetitive detailed 

inspections of certain parts for loose or 

missing attachment bolts, cracks or 

bushing migration, cracks or gouges, or 

broken, binding, or missing rollers; 

repetitive detailed inspections of certain 

parts for cracks or corrosion; repetitive 

lubrication; and on-condition actions if 

necessary. 

The FAA is issuing this AD to address 

departures of the inboard foreflap 

assembly from the airplane, which 

could result in damage to the airplane 

and adversely affect the airplane’s 

continued safe flight and landing. 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule. The following presents 

the comments received on the NPRM 

and the FAA’s response to each 

comment. 

Support for the NPRM 

The Air Line Pilots Association, 

International (ALPA) and Boeing 

expressed support for the NPRM. 

Request To Incorporate Inspection and 

Overhaul Program 

Atlas Air (Atlas) requested that the 

FAA revise the proposed AD to 

incorporate and provide credit for 

Atlas’s flap inspection and overhaul 

program. Atlas explained that after four 

flap failure events, their flap mitigation 

team formulated a program of actions 

that successfully address the unsafe 

conditions cited in the NPRM. 

The FAA acknowledges that 

alternative methods may exist to 

address the potential unsafe condition, 

but disagrees with the request to revise 

this AD to incorporate specific actions 

from the Atlas flap mitigation program. 

That program is unique to an individual 

operator, and Atlas has not provided the 

FAA substantiating data demonstrating 

that these proposed changes provide an 

equivalent level of safety. Atlas may 

apply for an AMOC with substantiating 

data. The FAA has not changed this AD 

with regard to this request. 

Request for Change in Inspection 

Requirement 

Cargolux (CLX) requested that the 

proposed inspection, as specified in 

Boeing Alert Requirements Bulletin 

747–57A2367 RB, dated November 15, 

2019, Table 1, Action 2, no longer 

include identifying nuts with part 

number BACN10HR7CD. CLX explained 

that determining the part number by 

inspection is difficult due to access 

restrictions, and operators may have to 

replace the subject nuts to be compliant 

with the proposed AD. 

The FAA disagrees with the requested 

exemption because it is unnecessary. 

Boeing Alert Requirements Bulletin 

747–57A2367 RB, dated November 15, 

2019, Table 1, Action 2, specifies a 

‘‘general visual inspection of the 

inboard foreflap assembly stop, stop 

attachment bolts, stop lug attachment 

bolts, and rollers.’’ The subject nuts are 

not specifically identified. Additionally, 

the service bulletin does not mandate a 

specific method of compliance for this 

inspection. It refers to Part 2 of Boeing 

Alert Service Bulletin 747–57A2367, 

dated November 15, 2019, where the 

subject nut is listed, as an accepted 

procedure. In accordance with Note 6 of 

the Accomplishment Instructions, 

‘‘when the words ‘refer to’ are used and 

the operator has an accepted alternative 

procedure, the accepted alternative 

procedure can be used.’’ The FAA has 

not changed this AD regarding this 

request. 

Request To Allow Alternative Part 

Numbers 

CLX requested that approved 

alternative, substitute, or 

interchangeable part numbers for 

specified parts be allowed when 

demonstrating compliance. CLX is 

concerned that operators may have 

trouble obtaining parts if the parts have 

been replaced and there are 

interchangeable parts available in lieu of 

the required part number. 

The FAA disagrees with the request. 

The design approval holder (DAH) 

identified the parts necessary to address 

the unsafe condition. Kits with those 

replacement part numbers may be 

acquired from the DAH. Additionally, 

CLX did not provide the FAA any 

substantiating data to demonstrate that 

any alternative/substitute part provides 

an acceptable level of safety. CLX may 

submit an AMOC request with 

supporting data that demonstrates an 

acceptable level of safety for a 

replacement part not specified in the 

service information. The FAA has not 

changed this AD regarding this request. 

Request To Specify Document as Aid 

Royal Dutch Airlines (KLM) and CLX 

requested that Boeing document 747– 

FTD–57–10002 be specified in the 

proposed AD as an aid for the general 

visual inspection described in Boeing 

Alert Requirements Bulletin 747– 

57A2367 RB, dated November 15, 2019, 

to identify part numbers currently 

installed on the airplane. KLM and CLX 

claimed that dirt, grease, or sealant may 

prevent part numbers from being 

identified by way of a general visual 

inspection and that the document 

provided by Boeing should be used as 

a visual aid. 

The FAA agrees with using visual 

aids or other documentation to help 

identify part numbers during the 

inspection. However, the FAA disagrees 

with revising the AD to require the 

specified document. Boeing Alert 

Requirements Bulletin 747–57A2367 

RB, dated November 15, 2019, refers to 

a procedure in Boeing Alert Service 

Bulletin 747–57A2367, dated November 

15, 2019, as an accepted procedure for 

the general visual inspection to identify 

the parts production configuration. Note 

6 of the Accomplishment Instructions 

states that ‘‘when the words ‘refer to’ are 

used and the operator has an accepted 

alternative procedure, the accepted 

alternative procedure can be used.’’ The 

FAA has not changed this AD regarding 

this request. 

Request To Allow Optional Records 

Check 

Both KLM and CLX requested that a 

maintenance records check be allowed 

as an option to the general visual 

inspection specified in Boeing Alert 

Requirements Bulletin 747–57A2367 

RB, dated November 15, 2019, for the 

purpose of identifying parts currently 

installed on the airplane. Both KLM and 

CLX stated that operators should be able 

to determine whether their maintenance 

records are accurate. 

The FAA disagrees with the request. 

The service information was 

coordinated with the DAH and it was 

determined that a physical check, as 

specified in Boeing Alert Requirements 

Bulletin 747–57A2367 RB, dated 

November 15, 2019, is required. This 

AD has not been changed regarding this 

request. 

Request To Accept Work Package From 

Previous Service Bulletin 

United Parcel Service (UPS) requested 

that the FAA also accept 

10752 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 

accomplishment of Work Package 3 of 

Boeing Alert Service Bulletin 747–27– 

2366, Revision 3, dated March 22, 2016, 

in lieu of the initial inspection specified 

by Table 4 of Boeing Alert Requirements 

Bulletin 747–57A2367 RB, dated 

November 15, 2019. UPS asserted that 

there is significant overlap between the 

two flap inspections. 

The FAA does not agree with the 

request. The inspections specified in 

Boeing Alert Requirements Bulletin 

747–57A2367 RB, dated November 15, 

2019, include additional structure to 

inspect, compared to Boeing Alert 

Service Bulletin 747–27–2366, Revision 

3, dated March 22, 2016, and also 

specify corrective action if damage is 

detected. The requirements of this AD 

have been coordinated with the DAH. 

UPS did not provide the FAA any 

substantiating data to demonstrate that 

the less stringent inspections from 

Boeing Alert Service Bulletin 747–27– 

2366, Revision 3, dated March 22, 2016, 

provide an acceptable level of safety. 

The FAA has not changed this AD as a 

result of this comment. 

Conclusion 

The FAA reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting this 

final rule as proposed, except for minor 

editorial changes. The FAA has 

determined that these minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM for 

addressing the unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Boeing Alert 

Requirements Bulletin 747–57A2367 

RB, dated November 15, 2019. This 

service information describes 

procedures for repetitive replacement of 

certain parts; a general visual inspection 

to determine production configuration 

for certain parts; a repetitive lubrication 

of certain parts and a repetitive general 

visual inspection of certain parts for any 

exuding grease; repetitive detailed 

inspections of certain parts for loose or 

missing attachment bolts, cracks or 

bushing migration, cracks or gouges, or 

broken, binding, or missing rollers; 

repetitive detailed inspections of certain 

parts for cracks or corrosion; repetitive 

lubrication; and on-condition actions if 

necessary. On-condition actions include 

replacements and repair. 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. 

Costs of Compliance 

The FAA estimates that this AD 

affects 125 airplanes of U.S. registry. 

The FAA estimate the following costs to 

comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Action Labor cost Parts cost Cost per product Cost on U.S. operators 

Repetitive replacement ................... Up to 10 work-hours × $85 per 

hour = Up to $850 per replacement cycle.

$35,719 Up to $36,569 per replacement cycle.Up to $4,571,125 per replacement cycle. 

General visual inspection for parts 

production configuration.

1 work-hour × $85 per hour = $85 0 $85 .................................. $10,625. 

Repetitive detailed inspections ....... 4 work-hours × $85 per hour = 

$340 per inspection cycle.

0 $340 per inspection cycle $42,500 per inspection 

cycle. 

Repetitive inspection for lubrication 

and repetitive lubrication.

1 work-hour × $85 per hour = $85 

per lubrication.

0 $85 per lubrication .......... $10,625 per lubrication. 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that would be required. The 

FAA has no way of determining the 

number of aircraft that might need these 

on-condition actions: 

ESTIMATED COSTS OF ON-CONDITION REPLACEMENTS

Labor cost Parts cost Cost per product 

Up to 8 work-hour × $85 per hour = $680 ........................................................................................................ Up to $17,720 .. Up to $18,400. 

The FAA has received no definitive 

data that would enable the FAA to 

provide cost estimates for the oncondition repairs specified in this AD. 

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. 

The FAA is 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) Will not affect intrastate aviation 

in Alaska, and 

(3) 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. 

Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 10753 

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: 

2021–02–15 The Boeing Company: 

Amendment 39–21398; Docket No. 

FAA–2020–0211; Product Identifier 

2020–NM–006–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 30, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 747–100, 747–100B, 747–100B SUD, 

747–200B, 747–200C, 747–200F, 747–300, 

747–400, 747–400D, 747–400F, and 747SR 

series airplanes, certificated in any category, 

as identified in Boeing Alert Requirements 

Bulletin 747–57A2367 RB, dated November 

15, 2019. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 57, Wings. 

(e) Unsafe Condition 

This AD was prompted by reports of 

inboard foreflap departures from the 

airplane. The FAA is issuing this AD to 

address departures of the inboard foreflap 

assembly from the airplane, which could 

result in damage to the airplane and 

adversely affect the airplane’s continued safe 

flight and landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Except as specified by paragraph (h) of this 

AD: At the applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Alert 

Requirements Bulletin 747–57A2367 RB, 

dated November 15, 2019, do all applicable 

actions identified in, and in accordance with, 

the Accomplishment Instructions of Boeing 

Alert Requirements Bulletin 747–57A2367 

RB, dated November 15, 2019. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 747–57A2367, dated November 15, 

2019, which is referred to in Boeing Alert 

Requirements Bulletin 747–57A2367 RB, 

dated November 15, 2019. 

(h) Exceptions to Service Information 

Specifications 

Where Boeing Alert Requirements Bulletin 

747–57A2367 RB, dated November 15, 2019, 

uses the phrase ‘‘the original issue date of 

Requirements Bulletin 747–57A2367 RB,’’ 

this AD requires using ‘‘the effective date of 

this AD.’’ 

(i) 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 (j) 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 Company 

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. 

(j) Related Information 

For more information about this AD, 

contact Eric Lin, Aerospace Engineer, 

Airframe Section, FAA, Seattle ACO Branch, 

2200 South 216th St., Des Moines, WA 

98198; phone and fax: 206–231–3523; email: 

eric.lin@faa.gov. 

(k) 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 Alert Requirements Bulletin 

747–57A2367 RB, dated November 15, 2019. 

(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; 

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

www.myboeingfleet.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety 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, 

email fedreg.legal@nara.gov, or go to: https:// 

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

Issued on January 14, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03593 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0691; Product 

Identifier 2020–NM–064–AD; Amendment 

39–21377; AD 2021–01–01] 

RIN 2120–AA64 

Airworthiness Directives; MHI RJ 

Aviation ULC (Type Certificate 

Previously Held by Bombardier, Inc.) 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

MHI RJ Aviation ULC Model CL–600– 

2B19 (Regional Jet Series 100 & 440) 

airplanes. This AD was prompted by 

evidence that a revised structural life 

limit of some components of the nose 

landing gear (NLG) and/or main landing 

gear (MLG) was not implemented during 

repair. This AD requires verifying that 

the affected components are installed on 

the airplane, revising the structural life 

limits in the existing structural 

deviation inspection requirements 

(SDIR) airplane document, and 

replacing affected components if 

necessary. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective March 30, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 30, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact MHI