22438 Federal Register / Vol. 87, No. 73 / Friday, April 15, 2022 / Rules and Regulations 

opinion, or expert testimony relating to 

official information, or for production of 

official records or information, in legal 

proceedings in which the United States 

or the DNFSB is not a named party. 

However, it does not apply to: 

* * * * * 

Dated: April 12, 2022. 

Joyce Connery, 

Chairperson. 

[FR Doc. 2022–08133 Filed 4–14–22; 8:45 am] 

BILLING CODE P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0389; Project 

Identifier MCAI–2022–00291–T; Amendment 

39–22003; AD 2022–07–15] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Airbus SAS Model A318, A319, A320, 

and A321 series airplanes. This AD was 

prompted by the detection of several 

channel failures on a newly developed 

braking and steering control unit 

(BSCU). This AD requires replacing 

affected BSCUs and revising the 

operator’s existing FAA-approved 

minimum equipment list (MEL), as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

incorporated by reference. This AD also 

limits the installation of affected parts. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

DATES: This AD becomes effective May 

2, 2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of May 2, 2022. 

The FAA must receive comments on 

this AD by May 31, 2022. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

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

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590, between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. 

For EASA material incorporated by 

reference (IBR) in this AD, contact 

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 IBR material on the EASA 

website at https://ad.easa.europa.eu. 

For Airbus SAS material IBR in this AD, 

contact Airbus SAS, Airworthiness 

Office—EIAS, Rond-Point Emile 

Dewoitine No: 2, 31700 Blagnac Cedex, 

France; telephone +33 5 61 93 36 96; fax 

+33 5 61 93 44 51; email 

account.airworth-eas@airbus.com; 

internet https://www.airbus.com. 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. 

It is also available in the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0389. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0389; or in person at Docket 

Operations between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. The AD docket contains this 

AD, the mandatory continuing 

airworthiness information (MCAI), any 

comments received, and other 

information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: Dan 

Rodina, Aerospace Engineer, Large 

Aircraft Section, FAA, International 

Validation Branch, 2200 South 216th 

St., Des Moines, WA 98198; telephone 

206–231–3225; email Dan.Rodina@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written data, views, or arguments about 

this final rule. Send your comments to 

an address listed under ADDRESSES. 

Include ‘‘Docket No. FAA–2022–0389; 

Project Identifier MCAI–2022–00291–T’’ 

at the beginning of your comments. The 

most helpful comments reference a 

specific portion of the final rule, explain 

the reason for any recommended 

change, and include supporting data. 

The FAA will consider all comments 

received by the closing date and may 

amend this final rule because of those 

comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in 14 CFR 

11.35, the FAA will post all comments 

received, without change, to https://

www.regulations.gov, including any 

personal information you provide. The 

agency will also post a report 

summarizing each substantive verbal 

contact received about this final rule. 

Confidential Business Information 

CBI is commercial or financial 

information that is both customarily and 

actually treated as private by its owner. 

Under the Freedom of Information Act 

(FOIA) (5 U.S.C. 552), CBI is exempt 

from public disclosure. If your 

comments responsive to this AD contain 

commercial or financial information 

that is customarily treated as private, 

that you actually treat as private, and 

that is relevant or responsive to this AD, 

it is important that you clearly designate 

the submitted comments as CBI. Please 

mark each page of your submission 

containing CBI as ‘‘PROPIN.’’ The FAA 

will treat such marked submissions as 

confidential under the FOIA, and they 

will not be placed in the public docket 

of this AD. Submissions containing CBI 

should be sent to Dan Rodina, 

Aerospace Engineer, Large Aircraft 

Section, FAA, International Validation 

Branch, 2200 South 216th St., Des 

Moines, WA 98198; telephone 206–231– 

3225; email Dan.Rodina@faa.gov. Any 

commentary that the FAA receives 

which is not specifically designated as 

CBI will be placed in the public docket 

for this rulemaking. 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2022–0032, 

dated March 3, 2022 (EASA AD 2022– 

0032) (also referred to as the MCAI), to 

correct an unsafe condition for all 

Airbus SAS Model A318–111, –112, 

–121, and –122 airplanes; Model A319– 

111, –112, –113, –114, –115, –131, –132, 

–133, –151N, –153N, and –171N 

airplanes; Model A320–211, –212, –214, 

–215, –216, –231, –232, –233, –251N, 

–252N, –253N, –271N, –272N, and 

–273N airplanes; and Model A321–111, 

–112, –131, –211, –212, –213, –231, 

–232, –251N, –251NX, –252N, –252NX, 

–253N, –253NX, –271N, –271NX, 

–272N, and –272NX airplanes. Model 


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A320–215 airplanes are not certificated 

by the FAA and are not included on the 

U.S. type certificate data sheet; this AD 

therefore does not include those 

airplanes in the applicability. 

This AD was prompted by the 

detection of several BSCU channel 

failures on a newly developed BSCU, 

having part number (P/N) E21327307. In 

the case of a loss of a single channel, the 

remaining channel will control aircraft 

braking. However, in case of dual 

channel failures, a loss of anti-skid 

function together with the reversion to 

the alternate braking mode, and the loss 

of nose wheel steering on these 

airplanes, could be induced. The FAA is 

issuing this AD to address this 

condition, which, if not corrected, could 

lead to loss of braking performance with 

significant increase in airplane stopping 

distance, possibly resulting in runway 

excursion. See the MCAI for additional 

background information. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2022–0032 specifies 

procedures for replacing BSCUs with P/ 

N E21327307, on which a fault signature 

is triggered. EASA AD 2022–0032 also 

specifies procedures for implementing 

the instructions of master minimum 

equipment list (MMEL) updates on the 

basis of which the operator’s existing 

MEL must be amended—that is, 

procedures for revising the operator’s 

existing FAA-approved MEL with the 

provisions in the MMEL updates 

specified in the EASA AD. EASA AD 

2022–0032 also limits the installation of 

affected parts. 

Airbus Alert Operators Transmission 

A32N025–22, Rev 00, dated February 

24, 2022, including Appendixes 1 

through 4, dated February 21, 2022, 

defines BSCU fault signatures that may 

be triggered on the airplane, and 

specifies procedures for replacing 

affected parts among other actions. 

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. 

FAA’s Determination 

These products have been approved 

by the aviation authority of another 

country and are approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with this 

State of Design Authority, it has notified 

the FAA of the unsafe condition 

described in the MCAI described above. 

The FAA is issuing this AD after 

determining that the unsafe condition 

described previously is likely to exist or 

develop on other products of these same 

type designs. 

Requirements of This AD 

This AD requires accomplishing the 

actions specified in EASA AD 2022– 

0032 described previously, except for 

any differences identified as exceptions 

in the regulatory text of this AD. 

EASA AD 2022–0032 requires 

operators to ‘‘inform all flight crews’’ of 

revisions to the MMEL, and thereafter to 

‘‘operate the aeroplane accordingly.’’ 

However, this AD does not specifically 

require those actions as they are already 

required by FAA regulations. FAA 

regulations (14 CFR 121.628(a)(2)) 

require operators to provide pilots with 

access to all of the information 

contained in the operator’s existing 

MEL. Furthermore, 14 CFR 121.628 

(a)(5) requires airplanes to be operated 

under all applicable conditions and 

limitations contained in the operator’s 

existing MEL. Therefore, including a 

requirement in this AD to operate the 

airplane according to the revised MEL 

would be redundant and unnecessary. 

Further, compliance with such a 

requirement in an AD would be 

impracticable to demonstrate or track on 

an ongoing basis; therefore, a 

requirement to operate the airplane in 

such a manner would be unenforceable. 

Explanation of Required Compliance 

Information 

In the FAA’s ongoing efforts to 

improve the efficiency of the AD 

process, the FAA developed a process to 

use some civil aviation authority (CAA) 

ADs as the primary source of 

information for compliance with 

requirements for corresponding FAA 

ADs. The FAA has been coordinating 

this process with manufacturers and 

CAAs. As a result, EASA AD 2022–0032 

is incorporated by reference in this AD. 

This AD requires compliance with 

EASA AD 2022–0032 in its entirety 

through that incorporation, except for 

any differences identified as exceptions 

in the regulatory text of this AD. Using 

common terms that are the same as the 

heading of a particular section in EASA 

AD 2022–0032 does not mean that 

operators need comply only with that 

section. For example, where the AD 

requirement refers to ‘‘all required 

actions and compliance times,’’ 

compliance with this AD requirement is 

not limited to the section titled 

‘‘Required Action(s) and Compliance 

Time(s)’’ in EASA AD 2022–0032. 

Service information required by EASA 

AD 2022–0032 for compliance will be 

available at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2022–0389 after this AD is 

published. 

Interim Action 

The FAA considers this AD interim 

action. If final action is later identified, 

the FAA might consider further 

rulemaking then. 

FAA’s Justification and Determination 

of the Effective Date 

Section 553(b)(3)(B) of the 

Administrative Procedure Act (APA) (5 

U.S.C. 551 et seq.) authorizes agencies 

to dispense with notice and comment 

procedures for rules when the agency, 

for ‘‘good cause,’’ finds that those 

procedures are ‘‘impracticable, 

unnecessary, or contrary to the public 

interest.’’ Under this section, an agency, 

upon finding good cause, may issue a 

final rule without providing notice and 

seeking comment prior to issuance. 

Further, section 553(d) of the APA 

authorizes agencies to make rules 

effective in less than thirty days, upon 

a finding of good cause. 

An unsafe condition exists that 

requires the immediate adoption of this 

AD without providing an opportunity 

for public comments prior to adoption. 

The FAA has found that the risk to the 

flying public justifies forgoing notice 

and comment prior to adoption of this 

rule because dual BSCU channel 

failures can induce loss of anti-skid 

function together with the reversion to 

the alternate braking mode, and the loss 

of nose wheel steering, and lead to loss 

of braking performance with significant 

increase in airplane stopping distance, 

possibly resulting in runway excursion. 

Accordingly, notice and opportunity for 

prior public comment are impracticable 

and contrary to the public interest 

pursuant to 5 U.S.C. 553(b)(3)(B). 

In addition, the FAA finds that good 

cause exists pursuant to 5 U.S.C. 553(d) 

for making this amendment effective in 

less than 30 days, for the same reasons 

the FAA found good cause to forgo 

notice and comment. 

Regulatory Flexibility Act (RFA) 

The requirements of the RFA do not 

apply when an agency finds good cause 

pursuant to 5 U.S.C. 553 to adopt a rule 

without prior notice and comment. 

Because the FAA has determined that it 

has good cause to adopt this rule 

without notice and comment, RFA 

analysis is not required. 

Costs of Compliance 

The FAA estimates that this AD 

affects 1,500 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 


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22440 Federal Register / Vol. 87, No. 73 / Friday, April 15, 2022 / Rules and Regulations 

ESTIMATED COSTS FOR REQUIRED ACTIONS

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

operators 

Up to 4.5 work-hours × $85 per hour = $382.50 ........................................................ $0 Up to $382.50 ........ Up to $573,750. 

The FAA has received no definitive 

data on which to base the cost estimates 

for the replacement parts specified in 

this AD. 

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 

individuals. The FAA does not control 

warranty coverage for affected 

individuals. 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, 

and 

(2) Will not affect intrastate aviation 

in Alaska. 

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: 

2022–07–15 Airbus SAS: Amendment 39– 

22003; Docket No. FAA–2022–0389; 

Project Identifier MCAI–2022–00291–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective May 2, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the Airbus SAS 

airplanes, certificated in any category, 

identified in paragraphs (c)(1) through (4) of 

this AD. 

(1) All Model A318–111, –112, –121, and 

–122 airplanes. 

(2) All Model A319–111, –112, –113, –114, 

–115, –131, –132, –133, –151N, –153N, and 

–171N airplanes. 

(3) All Model A320–211, –212, –214, –216, 

–231, –232, –233, –251N, –252N, –253N, 

–271N, –272N, and –273N airplanes. 

(4) All Model A321–111, –112, –131, –211, 

–212, –213, –231, –232, –251N, –251NX, 

–252N, –252NX, –253N, –253NX, –271N, 

–271NX, –272N, and –272NX airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 32, Landing gear. 

(e) Unsafe Condition 

This AD was prompted by the detection of 

several channel failures on a newly 

developed braking and steering control unit 

(BSCU), inducing, in case of dual channel 

failures, loss of anti-skid function together 

with the reversion to the alternate braking 

mode, and the loss of nose wheel steering. 

The FAA is issuing this AD to address this 

condition, which could lead to loss of 

braking performance with significant 

increase in airplane stopping distance, 

possibly resulting in runway excursion. 

(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 2022–0032, dated 

March 3, 2022 (EASA AD 2022–0032). 

(h) Exceptions to EASA AD 2022–0032 

(1) Where EASA AD 2022–0032 defines 

‘‘the AOT’’ as ‘‘Airbus Alert Operators 

Transmission (AOT) A32N025–22 

[undated],’’ this AD requires using Airbus 

Alert Operators Transmission A32N025–22, 

Rev 00, dated February 24, 2022, including 

Appendixes 1 through 4, dated February 21, 

2022. 

(2) Where paragraph (1) of EASA AD 2022– 

0032 specifies replacement of affected parts, 

replace the affected part in accordance with 

the ‘‘Remove and replace BSCU P/N 

E21327307’’ step in paragraph 5.6., 

‘‘Instructions,’’ of Airbus Alert Operators 

Transmission A32N025–22, Rev 00, dated 

February 24, 2022, including Appendixes 1 

through 4, dated February 21, 2022. No other 

actions in Airbus Alert Operators 

Transmission A32N025–22, Rev 00, dated 

February 24, 2022, including Appendixes 1 

through 4, dated February 21, 2022, are 

required for compliance for the replacement. 

(3) Where EASA AD 2022–0032 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(4) Where paragraph (2) of EASA AD 2022– 

0032 requires operators to ‘‘implement the 

instructions of the MMEL [master minimum 

equipment list] update,’’ this AD requires 

revising the operator’s existing FAAapproved minimum equipment list (MEL) 

with the provisions specified in ‘‘The MMEL 

update’’ as identified in EASA AD 2022– 

0032. 

(5) Where paragraph (2) of EASA AD 2022– 

0032 specifies to ‘‘inform all flight crews, 

and, thereafter, operate the aeroplane 

accordingly,’’ this AD does not require those 

actions as those actions are already required 

by existing FAA operating regulations. 

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

2022–0032 does not apply to this AD. 

(i) No Reporting Requirement 

Although Airbus Alert Operators 

Transmission A32N025–22, Rev 00, dated 

February 24, 2022, including Appendixes 1 

through 4, dated February 21, 2022, specifies 

to report certain information and send 

affected parts to the manufacturer, this AD 

does not include those actions. 


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Federal Register / Vol. 87, No. 73 / Friday, April 15, 2022 / Rules and Regulations 22441 

(j) Additional 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 responsible Flight 

Standards 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 responsible 

Flight Standards 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 Design 

Organization Approval (DOA). If approved by 

the DOA, the approval must include the 

DOA-authorized signature. 

(k) Related Information 

For more information about this AD, 

contact Dan Rodina, Aerospace Engineer, 

Large Aircraft Section, FAA, International 

Validation Branch, 2200 South 216th St., Des 

Moines, WA 98198; telephone 206–231– 

3225; email Dan.Rodina@faa.gov. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 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 2022–0032, dated March 3, 2022. 

(ii) Airbus Alert Operators Transmission 

A32N025–22, Rev 00, dated February 24, 

2022, including Appendixes 1 through 4, 

dated February 21, 2022. 

(3) For EASA AD 2022–0032, contact 

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 service 

information identified in this AD, contact 

Airbus SAS, Airworthiness Office—EIAS, 

Rond-Point Emile Dewoitine No: 2, 31700 

Blagnac Cedex, France; telephone +33 5 61 

93 36 96; fax +33 5 61 93 44 51; email 

account.airworth-eas@airbus.com; internet 

https://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. 

(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 

fr.inspection@nara.gov, or go to https://

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

Issued on March 29, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–08213 Filed 4–13–22; 11:15 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0386; Project 

Identifier AD–2022–00336–E; Amendment 

39–22001; AD 2022–07–13] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Division Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all Pratt 

& Whitney Division (PW) PW4074, 

PW4074D, PW4077, PW4077D, 

PW4084D, PW4090, and PW4090–3 

model turbofan engines. This AD was 

prompted by an in-flight shutdown 

(IFSD) of an engine due to an air/oil 

heat exchanger leak caused by corrosion 

and subsequent investigation by the 

manufacturer that revealed additional 

air/oil heat exchanger leaks. This AD 

requires an inspection of the air/oil heat 

exchanger and, depending on the results 

of the inspection, replacement of the 

air/oil heat exchanger. This AD also 

provides instructions for storing an air/ 

oil heat exchanger after inspection. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective May 2, 2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of May 2, 2022. 

The FAA must receive comments on 

this AD by May 31, 2022. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

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

instructions for submitting comments. 

• Fax: (202) 493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this final rule, contact Pratt & Whitney 

Division, 400 Main Street, East Hartford, 

CT 06118; phone: (860) 565–0140; 

email: help24@prattwhitney.com; 

website: https://

connect.prattwhitney.com. 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 (817) 222– 

5110. It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2022– 

0386. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0386; 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 street address for 

the Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Carol Nguyen, Aviation Safety Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

(781) 238–7655; email: carol.nguyen@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

On November 9, 2021, a Boeing 

Model 777 airplane, powered by PW 

PW4077 engines, on a ferry flight from 

San Francisco, CA to Honolulu, HI, 

experienced an oil leak on the number 

1 engine that resulted in an IFSD and air 

turnback to San Francisco, CA. A postflight inspection revealed that the oil 

leak was from the air/oil heat exchanger. 

After this event, on December 19, 2021, 

the manufacturer was made aware of 

another oil leak related to the air/oil 

heat exchanger that was discovered 

during a post-flight inspection after the 

first flight out of storage. Subsequent 

investigation revealed 19 air/oil heat 

exchanger leaks occurred on the affected 

engines during the past year, which is 

significantly higher than the three to 

four air/oil heat exchanger leaks 

typically occurring each year. After 


jspears on DSK121TN23PROD with RULES1