37224 Federal Register / Vol. 86, No. 133 / Thursday, July 15, 2021 / Rules and Regulations 

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 Luis A. Cortez-Muniz, Aerospace 

Engineer, Airframe Section, FAA, Seattle 

ACO Branch, 2200 South 216th St., Des 

Moines, WA 98198; phone and fax: 206–231– 

3958; email: luis.a.cortez-muniz@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 

777–57A0118 RB, dated June 23, 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 10, 2021. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–15029 Filed 7–14–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0258; Project 

Identifier AD–2020–01565–T; Amendment 

39–21637; AD 2021–14–10] 

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 747–400, 

747–400D, and 747–400F series 

airplanes. This AD was prompted by 

reports of burned Boeing Material 

Specification (BMS) 8–39 urethane foam 

found in certain locations on the 

airplane; investigation revealed that the 

fire-retardant properties degrade with 

age. This AD requires inspecting the 

insulation blankets in certain areas of 

the forward cargo compartment for 

exposed BMS 8–39 urethane foam, not 

encapsulated by a protective fire 

resistant barrier, and for seal integrity, 

and replacing the BMS 8–39 urethane 

foam and seal if necessary. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective August 19, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of August 19, 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–2021– 

0258. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0258; 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: 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 by adding an AD that would 

apply to certain The Boeing Company 

Model 747–400, 747–400D, and 747– 

400F series airplanes. The NPRM 

published in the Federal Register on 

April 13, 2021 (86 FR 19160). The 

NPRM was prompted by reports of 

burned BMS 8–39 urethane foam found 

in certain locations on the airplane; 

investigation revealed that the fireretardant properties degrade with age. In 

the NPRM, the FAA proposed to require 

inspecting the insulation blankets in 

certain areas of the forward cargo 

compartment for exposed BMS 8–39 

urethane foam, not encapsulated by a 

protective fire resistant barrier, and for 

seal integrity, and replacing the BMS 8– 

39 urethane foam and seal if necessary. 

The FAA is issuing this AD to address 

degraded BMS 8–39 urethane foam used 

in seals, which may fail to maintain 

sufficient halon concentrations in the 

cargo compartments to extinguish or 

contain fire or smoke, and may fail to 

prevent penetration of fire or smoke in 

areas of the airplane that are difficult to 

access for fire and smoke detection or 

suppression, which could result in loss 

of control of the airplane. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from Air 

Line Pilots Association, International 

(ALPA), who supported the NPRM 

without change. 

Conclusion 

The FAA reviewed the relevant data, 

considered the comment received, and 

determined that air safety requires 

adopting this AD as proposed. Except 

for minor editorial changes, this AD is 

adopted as proposed in the NPRM. 


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Federal Register / Vol. 86, No. 133 / Thursday, July 15, 2021 / Rules and Regulations 37225 

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 Requirements Bulletin 747– 

25–3725 RB, dated October 27, 2020. 

This service information specifies 

procedures for doing a general visual 

inspection of the insulation blankets in 

the area between station (STA) 960 and 

STA 1000 on the left and right sides of 

the forward cargo compartment for 

exposed BMS 8–39 urethane foam, not 

encapsulated by a protective fire 

resistant barrier, and seal integrity, and 

replacing any BMS 8–39 urethane foam 

that is found exposed and any seal that 

does not have acceptable integrity for a 

smoke barrier. 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 109 airplanes of U.S. registry. 

The FAA estimates 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 

Inspection ............................... 3 work-hours × $85 per hour = $255 ..................................... $0 $255 $27,795 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that are required. The FAA has 

no way of determining the number of 

aircraft that might need these oncondition actions: 

ESTIMATED COSTS OF ON-CONDITION ACTIONS

Labor cost Parts cost Cost per 

product 

1 work-hour × $85 per hour = $85 per finding ................................................................................................ Minimal .......... $85 per finding. 

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 adding 

the following new airworthiness 

directive: 

2021–14–10 The Boeing Company: 

Amendment 39–21637; Docket No. 

FAA–2021–0258; Project Identifier AD– 

2020–01565–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective August 19, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 747–400, 747–400D, and 747–400F 

series airplanes, certificated in any category, 

as identified in Boeing Special Attention 

Requirements Bulletin 747–25–3725 RB, 

dated October 27, 2020. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 25, Equipment/furnishings. 

(e) Unsafe Condition 

This AD was prompted by reports of 

burned Boeing Material Specification (BMS) 

8–39 urethane foam found in certain 

locations on the airplane; investigation 

revealed that the fire-retardant properties 

degrade with age. The FAA is issuing this AD 

to address degraded BMS 8–39 urethane 

foam used in seals, which may fail to 

maintain sufficient halon concentrations in 

the cargo compartments to extinguish or 

contain fire or smoke, and may fail to prevent 

penetration of fire or smoke in areas of the 

airplane that are difficult to access for fire 

and smoke detection or suppression, which 

could result in loss of control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 


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37226 Federal Register / Vol. 86, No. 133 / Thursday, July 15, 2021 / Rules and Regulations 

(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 747–25– 

3725 RB, dated October 27, 2020, do all 

applicable actions identified in, and in 

accordance with, the Accomplishment 

Instructions of Boeing Special Attention 

Requirements Bulletin 747–25–3725 RB, 

dated October 27, 2020. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Special Attention 

Service Bulletin 747–25–3725, dated October 

27, 2020, which is referred to in Boeing 

Special Attention Requirements Bulletin 

747–25–3725 RB, dated October 27, 2020. 

(h) Exception to Service Information 

Specifications 

Where Boeing Special Attention 

Requirements Bulletin 747–25–3725 RB, 

dated October 27, 2020, uses the phrase 

‘‘after the Original Issue date of Requirements 

Bulletin 747–25–3725 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) 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 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 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. 

(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 747–25–3725 RB, dated October 27, 

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 25, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–15027 Filed 7–14–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1025; Project 

Identifier MCAI–2020–00757–E; Amendment 

39–21630; AD 2021–14–03] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG (Type 

Certificate Previously Held by BMW 

Rolls-Royce GmbH and BMW RollsRoyce Aero Engines) Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Rolls-Royce Deutschland Ltd. & Co KG 

(RRD) BR700–715A1–30, BR700– 

715B1–30, and BR700–715C1–30 model 

turbofan engines. This AD was 

prompted by reports of HPT stage 1 

blades failing in service due to 

sulphidation and subsequent crack 

initiation. This AD requires removal and 

replacement of the HPT stage 1 blade 

and HPT stage 1 blade damper. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective August 19, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of August 19, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact 

Rolls-Royce Deutschland Ltd. & Co KG, 

Eschenweg 11, 15827 BlankenfeldeMahlow, Germany; phone: +49 (0) 33 

708 6 0; email: rrd.techhelp@rolls-royce; 

website: https://www.rolls-royce.com/ 

contact-us.aspx. You may view this 

service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 1200 District 

Avenue, Burlington, MA 01803. For 

information on the availability of this 

material at the FAA, call (781) 238– 

7759. It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

1025. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–1025; 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: 

Barbara Caufield, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7146; fax: (781) 238– 

7199; email: barbara.caufield@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 certain RRD BR700–715A1–30, 

BR700–715B1–30, and BR700–715C1– 

30 model turbofan engines. The NPRM 

published in the Federal Register on 

November 13, 2020 (85 FR 72608). The 

NPRM was prompted by reports of HPT 

stage 1 blades failing in service due to 

sulphidation and subsequent crack 

initiation, due to contamination of the 

blade shank passing by the blade 

damper. In the NPRM, the FAA 

proposed to require removal and 

replacement of the HPT stage 1 blade 

and HPT stage 1 blade damper. The 


khammond on DSKJM1Z7X2PROD with RULES