40932 Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Rules and Regulations 

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 18, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–16174 Filed 7–29–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0193; Project 

Identifier MCAI–2020–01612–T; Amendment 

39–21585; AD 2021–11–23] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

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 

Airbus SAS Model A350–941 and –1041 

airplanes. This AD was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. This AD requires revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations, as specified in a European 

Union Aviation Safety Agency (EASA) 

AD, which is incorporated by reference. 

This AD also requires, for certain 

airplanes, an update of the hydraulic 

monitoring system to include additional 

redundancy. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective September 3, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of September 3, 2021. 

ADDRESSES: For EASA material 

incorporated by reference (IBR) in this 

AD, contact the EASA, KonradAdenauer-Ufer 3, 50668 Cologne, 

Germany; telephone +49 221 8999 000; 

email ADs@easa.europa.eu; internet 

www.easa.europa.eu. You may find this 

IBR material on the EASA website at 

https://ad.easa.europa.eu. For Airbus 

SAS service information identified in 

this AD, contact Airbus SAS, 

Airworthiness Office—EAL, Rond-Point 

Emile Dewoitine No: 2, 31700 Blagnac 

Cedex, France; telephone +33 5 61 93 36 

96; fax +33 5 61 93 45 80; email 

continued-airworthiness.a350@

airbus.com; internet http://

www.airbus.com. You may view this 

IBR material 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 in 

the AD docket on the internet at https:// 

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0193. 

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–2021– 

0193; 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: 

Kathleen Arrigotti, Aerospace Engineer, 

Large Aircraft Section, International 

Validation Branch, FAA, 2200 South 

216th St., Des Moines, WA 98198; 

telephone and fax 206–231–3218; 

Kathleen.Arrigotti@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The EASA, which is the Technical 

Agent for the Member States of the 

European Union, has issued EASA AD 

2020–0268, dated December 4, 2020 

(EASA AD 2020–0268) (also referred to 

as the Mandatory Continuing 

Airworthiness Information, or the 

MCAI), to correct an unsafe condition 

for all Airbus SAS Model A350–941 and 

–1041 airplanes. EASA AD 2020–0268 

refers to Airbus A350 Airworthiness 

Limitations Section (ALS), Part 5, ‘‘Fuel 

Airworthiness Limitations (FAL),’’ 

Revision 04, dated May 29, 2020; and 

Airbus A350 ALS Part 5, ‘‘Fuel 

Airworthiness Limitations (FAL),’’ 

Variation 4.1, dated September 15, 2020. 

Airplanes with an original airworthiness 

certificate or original export certificate 

of airworthiness issued after September 

15, 2020, must comply with the 

airworthiness limitations specified as 

part of the approved type design and 

referenced on the type certificate data 

sheet; this AD therefore does not 

include those airplanes in the 

applicability. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Airbus SAS Model 

A350–941 and –1041 airplanes. The 

NPRM published in the Federal 

Register on March 26, 2021 (86 FR 

16117). The NPRM was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. The NPRM proposed to 

require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations, as 

specified in EASA AD 2020–0268. The 

NPRM also proposed to require, for 

certain airplanes, an update of the 

hydraulic monitoring system to include 

additional redundancy. 

The FAA is issuing this AD to address 

the overheat failure mode of the 

hydraulic engine-driven pump (EDP), 

which may cause a fast temperature rise 

of the hydraulic fluid, and, if combined 

with an inoperative fuel tank inerting 

system, could lead to an uncontrolled 

overheat of the hydraulic fluid, possibly 

resulting in ignition of the fuel-air 

mixture of the affected fuel tank. See the 

MCAI for additional background 

information. 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule. The FAA has considered 

the comment received. The Air Line 

Pilots Association, International (ALPA) 

stated that it supports the NPRM. 

Conclusion 

The FAA reviewed the relevant data, 

considered the comment 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 

EASA AD 2020–0268 describes new 

or more restrictive airworthiness 

limitations related to fuel tank ignition 


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Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Rules and Regulations 40933 

prevention and fuel tank flammability 

reduction. 

This AD would also require 

accomplishing a certain airworthiness 

limitation using the following service 

information. This service information 

describes procedures for an update of 

the hydraulic monitoring system to 

include additional redundancy (i.e., 

modifying the case-drain filter 

manifolds by installing new dual 

temperature sensors on the hydraulic 

EDP). These documents are distinct 

since they apply to different airplane 

models. 

• Airbus Service Bulletin A350–29– 

P025, dated August 10, 2020. 

• Airbus Service Bulletin A350–29– 

P027, dated November 24, 2020. 

• Airbus Service Bulletin A350–29– 

P029, dated December 16, 2020. 

This material 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 15 airplanes of U.S. registry. The 

FAA estimates the following costs to 

comply with this AD: 

The FAA has determined that revising 

the existing maintenance or inspection 

program takes an average of 90 workhours per operator, although the agency 

recognizes that this number may vary 

from operator to operator. Since 

operators incorporate maintenance or 

inspection program changes for their 

affected fleet(s), the FAA has 

determined that a per-operator estimate 

is more accurate than a per-airplane 

estimate. Therefore, the agency 

estimates the average total cost per 

operator to be $7,650 (90 work-hours × 

$85 per work-hour). 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Up to 510 work-hours × $85 per hour = Up to $43,350 .......................................... Up to $29,320 .. Up to $72,670 ........ Up to $1,090,050. 

According to the manufacturer, some 

or all 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 

known costs in the 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. 

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: 

2021–11–23 Airbus SAS: Amendment 39– 

21585; Docket No. FAA–2021–0193; 

Project Identifier MCAI–2020–01612–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective September 3, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Airbus SAS Model 

A350–941 and –1041 airplanes, certificated 

in any category; with an original 

airworthiness certificate or original export 

certificate of airworthiness issued after 

September 15, 2020. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 05, Time Limits/Maintenance 

checks; 29, Hydraulic power. 

(e) Reason 

This AD was prompted by a determination 

that new or more restrictive airworthiness 

limitations are necessary. The FAA is issuing 

this AD to address the overheat failure mode 

of the hydraulic engine-driven pump, which 

may cause a fast temperature rise of the 

hydraulic fluid, and, if combined with an 

inoperative fuel tank inerting system, could 

lead to an uncontrolled overheat of the 

hydraulic fluid, possibly resulting in ignition 

of the fuel-air mixture of the affected fuel 

tank. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Requirements 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, European Union Aviation 

Safety Agency (EASA) AD 2020–0268, dated 

December 4, 2020 (EASA AD 2020–0268). 

(h) Exceptions to EASA AD 2020–0268 

(1) Where Section 6 of the service 

information referenced in EASA AD 2020– 

0268 specifies to update the hydraulic 

monitoring system ‘‘to include additional 

redundancy to be installed (MOD 114073 and 

MOD 114075 OR 114531 and MOD 114075 

OR MOD 114533 and MOD 114075 OR MOD 

114535 and MOD 114075),’’ this AD requires 


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40934 Federal Register / Vol. 86, No. 144 / Friday, July 30, 2021 / Rules and Regulations 

that the update of the hydraulic monitoring 

system be accomplished using the method of 

compliance specified in paragraphs (h)(1)(i) 

through (iv) of this AD, as applicable. 

(i) For Model A350–941 airplanes 

identified in Airbus Service Bulletin A350– 

29–P025 (MOD 114531 and MOD 114075): 

The modification must be done in 

accordance with paragraphs 3.C., 3.D., and 

3.E. of the Accomplishment Instructions of 

Airbus Service Bulletin A350–29–P025, 

dated August 10, 2020. 

(ii) For Model A350–941 airplanes 

identified in Airbus Service Bulletin A350– 

29–P027 (MOD 114533 and MOD 114075): 

The modification must be done in 

accordance with paragraphs 3.C., 3.D., and 

3.E. of the Accomplishment Instructions of 

Airbus Service Bulletin A350–29–P027, 

dated November 24, 2020. 

(iii) For Model A350–941 airplanes 

identified in Airbus Service Bulletin A350– 

29–P029 (MOD 114535 and MOD 114075): 

The modification must be done in 

accordance with paragraphs 3.C., 3.D., and 

3.E. of the Accomplishment Instructions of 

Airbus Service Bulletin A350–29–P029, 

dated December 16, 2020. 

(iv) For Model A350–941 airplanes not 

identified in paragraphs (h)(1)(i) through (iii) 

of this AD, and without MOD 114073 and 

114075 installed in production: The 

modification must be done using a method 

approved by the Manager, Large Aircraft 

Section, International Validation Branch, 

FAA; or EASA; or Airbus SAS’s EASA 

Design Organization Approval (DOA). If 

approved by the DOA, the approval must 

include the DOA-authorized signature. 

(2) Where EASA AD 2020–0268 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(3) The requirements specified in 

paragraphs (1) and (2) of EASA AD 2020– 

0268 do not apply to this AD. 

(4) Paragraph (3) of EASA AD 2020–0268 

specifies revising ‘‘the approved AMP’’ 

within 12 months after its effective date, but 

this AD requires revising the existing 

maintenance or inspection program, as 

applicable, within 90 days after the effective 

date of this AD. 

(5) The initial compliance time for doing 

the tasks specified in paragraph (3) of EASA 

AD 2020–0268 is at the applicable 

‘‘thresholds’’ as incorporated by the 

requirements of paragraph (3) of EASA AD 

2020–0268, or within 90 days after the 

effective date of this AD, whichever occurs 

later. 

(6) The provisions specified in paragraphs 

(4) and (5) of EASA AD 2020–0268 do not 

apply to this AD. 

(7) The ‘‘Remarks’’ section of EASA AD 

2020–0268 does not apply to this AD. 

(i) Provisions for Alternative Actions, 

Intervals, and Critical Design Configuration 

Control Limitations (CDCCLs) 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections), 

intervals, and CDCCLs are allowed unless 

they are approved as specified in the 

provisions of the ‘‘Ref. Publications’’ section 

of EASA AD 2020–0268. 

(j) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, Large Aircraft 

Section, International Validation 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 Large Aircraft 

Section, International Validation Branch, 

send it to the attention of the person 

identified in paragraph (k) of this AD. 

Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov. 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, Large Aircraft Section, 

International Validation Branch, FAA; or 

EASA; or Airbus SAS’s EASA DOA. If 

approved by the DOA, the approval must 

include the DOA-authorized signature. 

(3) Required for Compliance (RC): Except 

as required by paragraph (j)(2) of this AD, if 

any service information contains procedures 

or tests that are identified as RC, those 

procedures and tests must be done to comply 

with this AD; any procedures or tests that are 

not identified as RC are recommended. Those 

procedures and tests that are not identified 

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 procedures and tests identified as RC can 

be done and the airplane can be put back in 

an airworthy condition. Any substitutions or 

changes to procedures or tests identified as 

RC require approval of an AMOC. 

(k) Related Information 

For more information about this AD, 

contact Kathleen Arrigotti, Aerospace 

Engineer, Large Aircraft Section, 

International Validation Branch, FAA, 2200 

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

telephone and fax 206–231–3218; 

Kathleen.Arrigotti@faa.gov. 

(l) 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) European Union Aviation Safety Agency 

(EASA) AD 2020–0268, dated December 4, 

2020. 

(ii) Airbus Service Bulletin A350–29–P025, 

dated August 10, 2020. 

(iii) Airbus Service Bulletin A350–29– 

P027, dated November 24, 2020. 

(iv) Airbus Service Bulletin A350–29– 

P029, dated December 16, 2020. 

(3) For EASA AD 2020–0268, contact the 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

000; email ADs@easa.europa.eu; internet 

www.easa.europa.eu. You may find this 

EASA AD on the EASA website at https://

ad.easa.europa.eu. For Airbus SAS service 

information identified in this AD, contact 

Airbus SAS, Airworthiness Office—EAL, 

Rond-Point Emile Dewoitine No: 2, 31700 

Blagnac Cedex, France; telephone +33 5 61 

93 36 96; fax +33 5 61 93 45 80; email 

continued-airworthiness.a350@airbus.com; 

internet http://www.airbus.com. 

(4) You may view this material 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. This material may be found 

in the AD docket on the internet at https:// 

www.regulations.gov by searching for and 

locating Docket No. FAA–2021–0193. 

(5) You may view this material 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/ibr-locations.html. 

Issued on May 21, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–16241 Filed 7–29–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0303; Project 

Identifier MCAI–2020–01367–T; Amendment 

39–21611; AD 2021–13–06] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Airbus SAS Model A350–941 and –1041 

airplanes. This AD was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. This AD requires revising the 

existing maintenance or inspection 

program, as applicable, to incorporate 

new or more restrictive airworthiness 

limitations, as specified in two 

European Union Aviation Safety Agency 

(EASA) ADs, which are incorporated by 

reference. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 


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