33112 Federal Register / Vol. 86, No. 119 / Thursday, June 24, 2021 / Rules and Regulations 

(e) Unsafe Condition 

This AD was prompted by a report that 

during refueling of the right main tank, if 

there is a failure of the automatic shutoff 

system, the refueling panel does not provide 

the required flashing indication that the 

automatic shutoff has failed to shut off the 

fuel. The FAA is issuing this AD to address 

this indication failure to warn the person 

fueling the airplane, which could cause 

overfill of the right main tank, spilled fuel, 

and pooling on the ground that could come 

in contact with an ignition source, resulting 

in a ground fire. 

(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 Special 

Attention Requirements Bulletin 737–28– 

1363 RB, dated June 2, 2020, do all 

applicable actions identified in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Special Attention 

Requirements Bulletin 737–28–1363 RB, 

dated June 2, 2020. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Special Attention 

Service Bulletin 737–28–1363, dated June 2, 

2020, which is referred to in Boeing Special 

Attention Requirements Bulletin 737–28– 

1363 RB, dated June 2, 2020. 

(h) Exception to Service Information 

Specifications 

Where Boeing Special Attention 

Requirements Bulletin 737–28–1363 RB, 

dated June 2, 2020, uses the phrase ‘‘the 

Original Issue date of Requirements Bulletin 

737–28–1363 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 responsible Flight 

Standards 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)(1) of 

this AD. Information may be emailed to: 

9-ANM-Seattle-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 responsible Flight Standards 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 

(1) For more information about this AD, 

contact Chris Baker, Aerospace Engineer, 

Propulsion Section, FAA, Seattle ACO 

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

WA 98198; phone and fax: 206–231–3552; 

email: christopher.r.baker@faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (k)(3) and (4) of this AD. 

(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 Special Attention Requirements 

Bulletin 737–28–1363 RB, dated June 2, 

2020. 

(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, 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 June 3, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–13125 Filed 6–23–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0680; Project 

Identifier 2020–NM–079–AD; Amendment 

39–21598; AD 2021–12–11] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2016–25– 

29, which applied to certain The Boeing 

Company Model 767–200 and –300 

series airplanes. AD 2016–25–29 

required replacing the cargo 

compartment insulation blankets on the 

left and right sides with new insulation 

blankets that incorporate fire stops. This 

AD was prompted by a report of a fire 

in the bilge area of the cargo 

compartment that burned through the 

insulation blankets that were intended 

to prevent smoke from migrating behind 

the cargo compartment sidewall liners 

and upward into the main cabin. This 

AD continues to require the actions in 

AD 2016–25–29 for certain airplanes. 

This AD also adds airplanes to the 

applicability and requires a general 

visual inspection of the replacement 

insulation blankets to determine if the 

blankets are in serviceable condition 

and correctly installed, and applicable 

on-condition actions. For certain 

airplanes, this AD also requires an 

inspection to determine the insulation 

blanket part number installed; 

replacement of additional insulation 

blankets; and applicable on-condition 

actions. The FAA is issuing this AD to 

address the unsafe condition on these 

products. 

DATES: This AD is effective July 29, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publications listed in this 

AD as of July 29, 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; 

telephone 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 at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0680. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0680; 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 


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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: Julie 

Linn, Aerospace Engineer, Cabin Safety 

and Environmental Systems Section, 

FAA, Seattle ACO Branch, 2200 South 

216th St., Des Moines, WA 98198; 

phone and fax: 206–231–3584; email: 

Julie.Linn@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2016–25–29, 

Amendment 39–18755 (81 FR 94956, 

December 27, 2016) (AD 2016–25–29). 

AD 2016–25–29 applied to certain The 

Boeing Company Model 767–200 and 

–300 series airplanes, and required 

replacing the cargo compartment 

insulation blankets on the left and right 

sides with new insulation blankets that 

incorporate fire stops. The NPRM 

published in the Federal Register on 

August 10, 2020 (85 FR 48122). The 

NPRM was prompted by a report of a 

fire in the bilge area of the cargo 

compartment that burned through the 

insulation blankets that were intended 

to prevent smoke from migrating behind 

the cargo compartment sidewall liners 

and upward into the main cabin. In the 

NPRM, the FAA proposed to continue to 

require the actions in AD 2016–25–29 

for certain airplanes. The NPRM also 

proposed to add airplanes to the 

applicability and proposed to require a 

general visual inspection of the 

replacement insulation blankets to 

determine if the blankets are in 

serviceable condition and correctly 

installed, and applicable on-condition 

actions. For certain airplanes, the NPRM 

also proposed to require an inspection 

to determine the insulation blanket part 

number installed; replacement of 

additional insulation blankets; and 

applicable on-condition actions. The 

FAA is issuing this AD to address a fire 

in the bilge area of the cargo 

compartment, which if not contained 

could lead to a possible smoke and fire 

event in the passenger compartment. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

three commenters, including Aviation 

Partners Boeing, Delta Air Lines (DAL), 

and United Airlines (UAL). The 

following presents the comments 

received on the NPRM and the FAA’s 

response to each comment. 

Effect of Winglets on Accomplishment 

of the Proposed Actions 

Aviation Partners Boeing stated that 

the installation of winglets per 

Supplemental Type Certificate (STC) 

ST01920SE does not affect the 

accomplishment of the manufacturer’s 

service instructions. 

The FAA agrees with the commenter 

that STC ST01920SE does not affect the 

accomplishment of the manufacturer’s 

service instructions. Therefore, the 

installation of STC ST01920SE does not 

affect the ability to accomplish the 

actions required by this AD. The FAA 

has not changed this AD in this regard. 

Request To Delay Rule Pending Revised 

Referenced Service Information 

UAL concurs with the NPRM and 

requested that the FAA delay issuance 

of the final rule until the referenced 

Illustrated Parts Catalog (IPC) and 

airplane maintenance manual (AMM) 

specified in Boeing Service Bulletin 

767–25–0550, Revision 1, dated 

December 4, 2019, are revised to ensure 

continued airworthiness and safety. 

UAL stated that the referenced service 

information will provide proper 

documentation support to maintain the 

insulation blanket changes specified in 

Boeing Service Bulletin 767–25–0550, 

Revision 1, dated December 4, 2019, 

prior to the release of the final rule. 

UAL also commented that the revised 

referenced service information can 

mitigate incorrect repairs and blanket 

installation, and minimize future 

alternative methods of compliance 

(AMOC) requests. 

The FAA disagrees with delaying the 

final rule. Since the publication of the 

NPRM, the operator’s existing IPC and 

AMM have been revised and provide 

accurate part numbers and corrective 

action procedures for missing insulation 

blankets. In addition, an operator unable 

to accomplish the actions in this AD for 

any reason may request approval of an 

AMOC under the provisions of 

paragraph (i)(1) of this AD, if sufficient 

data are submitted to substantiate that 

the change would provide an acceptable 

level of safety. The FAA has not 

changed this AD in this regard. 

Request To Identify Proper Insulation 

Blankets 

UAL expressed concern about the 

post-compliance maintenance 

configuration using Boeing Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, in the absence of a 

revised Boeing 767 IPC (i.e., Boeing 767 

IPC sections 25–21–05; 25–52–03; 25– 

52–52; 25–52–62; 25–55–01) to identify 

the proper insulation blankets with 

integrated fire stops. UAL described 

disagreements in the service 

information for the identity of the 

insulation blanket installations and 

corresponding part numbers in the aft 

and forward cargo compartment of postmodification airplanes and missing 

insulation blankets from certain 

appendixes and figures. UAL stated that 

it is essential to identify post-service 

bulletin configurations in certain Boeing 

767 IPCs to ensure that AD compliance 

is maintained and to avoid inadvertent 

demodification by maintenance 

technicians. UAL commented that the 

configuration control for the airplane is 

the IPC, which maintenance technicians 

use for proper part replacement, and 

would alert maintenance personnel of 

insulation blankets having the 

integrated fire stops to ensure continued 

airworthiness. 

As the FAA stated previously, since 

the NPRM was issued, relevant sections 

of the IPC have been revised. The 

operator’s existing IPC contains the 

accurate part numbers and corrects 

missing insulation blankets. For 

clarification, the part numbers for the 

insulation blankets specified in Boeing 

Special Attention Service Bulletin 767– 

25–0550, dated January 15, 2015, and 

Boeing Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, are acceptable for 

installation; the new part numbers 

requires less work to install. The FAA 

has revised paragraph (h)(4) of this AD 

accordingly. 

In addition, Boeing found that the 

insulation blankets at certain locations 

were not affected by the integrated fire 

stop issue that are addressed in Boeing 

Special Attention Service Bulletin 767– 

25–0550, Revision 1, dated December 4, 

2019. Therefore, these insulation 

blankets were removed from Boeing 

Special Attention Service Bulletin 767– 

25–0550, Revision 1, dated December 4, 

2019. Boeing Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, includes work to reinspect the installation of the insulation 

blankets that were installed in Boeing 

Special Attention Service Bulletin 767– 

25–0550, dated January 15, 2015. Since 

those insulation blankets that are not 

affected by the fire stop issue were 

removed from Boeing Special Attention 

Service Bulletin 767–25–0550, Revision 

1, dated December 4, 2019, there is no 

need for instructions in Revision 1 to 

inspect the work that was performed in 

Boeing Special Attention Service 

Bulletin 767–25–0550, dated January 15, 

2015. The FAA has not changed this AD 

in this regard. 


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Request To Correct the Date of the 

Service Information 

UAL commented that, in the toolbox 

on https://www.myboeingfleet.com, 

there are two versions of Boeing Special 

Attention Service Bulletin 767–25– 

0550, Revision 1: One version is dated 

December 4, 2019, and one version is 

dated December 5, 2019. UAL also 

commented that the header of the 

toolbox states that Boeing Special 

Attention Service Bulletin 767–25– 

0550, Revision 1, dated December 4, 

2019, is not the current version. UAL 

stated that the proper service 

information date needs to be addressed 

in the NPRM. 

The FAA has confirmed that the 

correct date of the service information is 

December 4, 2019, and that there is 

currently only one version of the service 

information cited on https://

www.myboeingfleet.com. The FAA has 

not changed this AD in this regard. 

Request for Correct Figure Reference 

DAL commented that figure 42–A of 

Boeing Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, refers to item 4 

between stations 434 through 456, but it 

should be item 3. DAL stated this 

citation has been confirmed by Boeing 

in Service Request 3–4634446605. 

The FAA agrees that the correct 

reference for figure 42–A between 

stations 434 through 456 of Boeing 

Special Attention Service Bulletin 767– 

25–0550, Revision 1, dated December 4, 

2019, is item 3. In addition, figure 42 is 

a RC step. The FAA has added 

paragraph (h)(2) of this AD to identify 

the correct item number. 

Request To Correct Insulation Blanket 

Location 

DAL commented that in figure 51 of 

Boeing Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, there should be an 

insulation blanket depicted between 

station (STA) 1395 and STA 1417. DAL 

also commented that appendixes D, E, 

F, G, H, and I of Boeing Special 

Attention Service Bulletin 767–25– 

0550, Revision 1, dated December 4, 

2019, show the insulation blanket part 

numbers between STA 1395 and STA 

1417. DAL reported that Boeing 

confirmed that the insulation blanket 

was missing from that figure. 

The FAA agrees with the commenter’s 

statement. The FAA has added 

paragraph (h)(3) of this AD to specify 

that Boeing Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, figures 49, 50, and 

51, between STA 1395 and STA 1417, 

should indicate that an insulation 

blanket is installed. 

Request To Allow Stoppage Options Due 

to the Pandemic 

For airplanes that have been in mass 

parking due to the worldwide 

pandemic, DAL requested clock 

stoppage options such as those offered 

to operators by the manufacturer for 

scheduled maintenance program tasks. 

DAL stated that this request is for 

airplanes that meet the following 

conditions: 

• Airplanes that are currently 

undergoing storage, or airplanes that 

will enter storage during the compliance 

time of the proposed AD. 

• Airplanes that were preserved with 

instructions in close reference to the 

AMM procedures. 

DAL also commented that an airplane 

in a preserved state does not experience 

the following risk factors that are taken 

into consideration for the proposed AD: 

• Passenger Safety: The newly 

installed insulation blankets are meant 

to prevent smoke from migrating behind 

the cargo compartment sidewall liners 

and upward into the main cabin, where 

it could affect passengers. If the airplane 

does not have passengers during the 

time in which it is preserved, there is no 

increased risk to the public. 

• Potential fire in the cargo 

compartments: Since the airplane is not 

in operation, there is no cargo being 

stored in the cargo compartments, 

meaning it is highly unlikely that there 

will be a fire initiated to cause smoke. 

In addition, DAL asserted that the 

safety risk associated with the inferior 

insulation blankets installed on the 

airplane is either a small consideration 

or not a consideration at all in the 

calculation of overall fleet risk because 

the concern is not with degradation of 

insulation blanket material, or any other 

factor in which an increase in 

compliance time would increase the 

risk. 

The FAA disagrees with having 

stoppage options due to the unsafe 

condition. In developing an appropriate 

compliance time, the FAA considered 

the safety implications, parts 

availability, and normal maintenance 

schedules for timely accomplishment of 

the actions in this AD. Further, the FAA 

arrived at the proposed compliance time 

with Boeing’s concurrence. It is difficult 

to plan for every possible storage 

scenario, and currently, the FAA does 

not have procedures that would address 

every possible scenario to ensure that all 

airplanes will be addressed in a timely 

manner once the airplanes are back in 

service. If an operator is unable to 

accomplish the actions in this AD for 

whatever reason or has the airplane in 

storage, it may request approval of an 

AMOC under the provisions of 

paragraph (i)(1) of this AD, if sufficient 

data are submitted to substantiate that 

the change would provide an acceptable 

level of safety. The FAA has not 

changed this AD in this regard. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting this AD as proposed. Except 

for minor editorial changes, and any 

other changes described previously, this 

AD is adopted as proposed in the 

NPRM. None of the changes will 

increase the economic burden on any 

operator. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Boeing Special 

Attention Service Bulletin 767–25– 

0550, Revision 1, dated December 4, 

2019. The service information describes 

procedures for replacement of cargo 

compartment insulation blankets 

between stringers 29 and 33, on the left 

and right sides, with new insulation 

blankets that incorporate fire stops; an 

inspection to determine the insulation 

blanket part number installed between 

stringers 29 and 33, on the left and right 

sides; a general visual inspection of the 

replacement insulation blankets 

between stringers 29 and 33, on the left 

and right sides to determine if the 

insulation blankets are in serviceable 

condition and correctly installed; and 

applicable on-condition actions. Oncondition actions include repair, 

replacement, and correction of 

insulation blanket installations. 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 ADDRESSES. 

Costs of Compliance 

The FAA estimates that this AD 

affects 329 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 


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ESTIMATED COSTS FOR REQUIRED ACTIONS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Replacement (retained actions from 

AD 2016-25-29).

Up to 54 work-hours × $85 per hour 

= Up to $4,590.

(*) Up to $4,590 ........ Up to $1,510,110. 

Inspections and replacements (new 

proposed action).

Up to 62 work-hour × $85 per hour = 

Up to $5,270.

Up to $35,900 Up to $41,170 ...... Up to $13,944,530. 

* The FAA has received no definitive data that would enable providing parts cost estimates for the retained actions specified in this AD. 

The FAA has received no definitive 

data that would enable us to provide 

cost estimates for the on-condition 

actions specified in this AD. 

According to the manufacturer, some 

of the costs of this AD may be covered 

under warranty, thereby reducing the 

cost impact on affected operators. The 

FAA does not control warranty coverage 

for affected operators. As a result, the 

FAA has included all available costs in 

our cost estimate. 

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. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

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: 

■ a. Removing Airworthiness Directive 

(AD) 2016–25–29, Amendment 39– 

18755 (81 FR 94956, December 27, 

2016); and 

■ b. Adding the following new AD: 

2021–12–11 The Boeing Company: 

Amendment 39–21598; Docket No. 

FAA–2020–0680; Project Identifier 

2020–NM–079–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective July 29, 2021. 

(b) Affected ADs 

This AD replaces AD 2016–25–29, 

Amendment 39–18755 (81 FR 94956, 

December 27, 2016) (AD 2016–25–29). 

(c) Applicability 

This AD applies to The Boeing Company 

Model 767–200, –300, –300F, and –400ER 

series airplanes, certificated in any category, 

as identified in Boeing Special Attention 

Service Bulletin 767–25–0550, Revision 1, 

dated December 4, 2019. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 25, Equipment/furnishings. 

(e) Unsafe Condition 

This AD was prompted by a report of a fire 

in the bilge area of the cargo compartment 

that burned through the insulation blankets 

that were intended to prevent smoke from 

migrating behind the cargo compartment 

sidewall liners and upward into the main 

cabin. The FAA is issuing this AD to address 

a fire in the bilge area of the cargo 

compartment, which if not contained could 

lead to a possible smoke and fire event in the 

passenger compartment. 

(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 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Special Attention Service Bulletin 767–25– 

0550, Revision 1, dated December 4, 2019, do 

all applicable actions identified as ‘‘RC’’ 

(required for compliance) in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Special Attention 

Service Bulletin 767–25–0550, Revision 1, 

dated December 4, 2019. 

(h) Exceptions and Clarifications to Service 

Information Specifications 

(1) Where Boeing Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 2019, uses the phrase ‘‘the 

Revision 1 date of this service bulletin,’’ this 

AD requires using ‘‘the effective date of this 

AD.’’ 

(2) Where Figure 42–A of Boeing Special 

Attention Service Bulletin 767–25–0550, 

Revision 1, dated December 4, 2019, 

identifies item 4 between stations 434 

through 456, the correct item between 

stations 434 through 456 is item 3. 

(3) Figures 49, 50, and 51 of Boeing Special 

Attention Service Bulletin 767–25–0550, 

Revision 1, dated December 4, 2019, are 

missing the depiction of an insulation 

blanket, and an installation blanket must be 

installed between station (STA) 1395 and 

1417. 

(4) The part numbers for the insulation 

blankets specified in Boeing Special 

Attention Service Bulletin 767–25–0550, 

dated January 15, 2015, and Boeing Special 

Attention Service Bulletin 767–25–0550, 

Revision 1, dated December 4, 2019, are 

acceptable for installation; the new part 

numbers specified in Boeing Special 

Attention Service Bulletin 767–25–0550, 

Revision 1, dated December 4, 2019, require 

less work to install. 

(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 


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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. 

(4) AMOCs approved previously for AD 

2016–25–29 are approved as AMOCs for the 

corresponding provisions of Boeing Special 

Attention Service Bulletin 767–25–0550, 

Revision 1, dated December 4, 2019, that are 

required by paragraph (g) of this AD. 

(5) For service information that contains 

steps that are labeled as Required for 

Compliance (RC), the provisions of 

paragraphs (i)(5)(i) and (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. 

(j) Related Information 

For more information about this AD, 

contact Julie Linn, Aerospace Engineer, 

Cabin Safety and Environmental Systems 

Section, FAA, Seattle ACO Branch, 2200 

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

phone and fax: 206–231–3584; email: 

Julie.Linn@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 Special Attention Service 

Bulletin 767–25–0550, Revision 1, dated 

December 4, 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; 

telephone 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 June 3, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–13097 Filed 6–23–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1028; Project 

Identifier AD–2020–00978–T; Amendment 

39–21599; AD 2021–12–12] 

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 all The 

Boeing Company Model 717–200 

airplanes. This AD was prompted by a 

report of discrepant spoiler assemblies, 

which have the wrong splice bar 

installed and lack reinforcing doublers, 

and by reports that some splice bars 

were shipped for installation on Model 

717–200 airplanes, although they were 

not eligible for installation on Model 

717–200 airplanes and were identified 

incorrectly with the Model 717–200 

splice bar part number. This AD 

requires a one-time inspection of the 

left- and right-wing inboard and 

outboard spoiler assemblies, for the 

correct configuration of the splice bar 

and doublers, and repair or replacement 

if necessary. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective July 29, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of July 29, 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; 

telephone 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 at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

1028. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–1028; 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: 

Mohit Garg, Aerospace Engineer, 

Airframe Section, FAA, Los Angeles 

ACO Branch, 3960 Paramount 

Boulevard, Lakewood, CA 90712–4137; 

phone: 562–627–5264; fax: 562–627– 

5210; email: mohit.garg@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all The Boeing Company Model 

717–200 airplanes. The NPRM 

published in the Federal Register on 

December 29, 2020 (85 FR 85559). The 

NPRM was prompted by a report of 

discrepant spoiler assemblies, which 

have the wrong splice bar installed and 

lack reinforcing doublers, and by reports 

that some splice bars were shipped for 

installation on Model 717–200 

airplanes, although they were not 

eligible for installation on Model 717– 

200 airplanes and were identified 

incorrectly with the Model 717–200 

splice bar part number. In the NPRM, 

the FAA proposed to require a one-time 

inspection of the left- and right-wing 

inboard and outboard spoiler assemblies 

for the correct splice bar and doublers 


khammond on DSKJM1Z7X2PROD with RULES