Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 63011 

1 In the preamble of the NPRM, the FAA 

inadvertently referred to model ‘‘A320–200’’ series 

airplanes. The affected airplane models, however, 

were correctly described in the Applicability 

paragraph. The preamble of this final rule has been 

corrected to reference the correct model, ‘‘A330– 

200’’ series airplanes. 

it to the attention of the person identified in 

paragraph (j) of this AD. Information may be 

emailed to: 9-AVS-AIR-730-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, International Validation 

Branch, FAA; or EASA; or Saab AB, Support 

and Services’ EASA Design Organization 

Approval (DOA). If approved by the DOA, 

the approval must include the DOAauthorized signature. 

(j) Additional Information 

For more information about this AD, 

contact Shahram Daneshmandi, Aviation 

Safety Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

206–231–3220; email 

Shahram.Daneshmandi@faa.gov. 

(k) 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 2022–0216R1, dated February 1, 

2023; corrected February 2, 2023. 

(ii) [Reserved] 

(3) For EASA AD 2022–0216R1, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

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

easa.europa.eu. You may find this EASA AD 

on the EASA website at ad.easa.europa.eu. 

(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 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: 

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

Issued on August 17, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–19899 Filed 9–13–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1051; Project 

Identifier MCAI–2022–01565–T; Amendment 

39–22529; AD 2023–17–03] 

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 all 

Airbus SAS Model A330–200 series 

airplanes, Model A330–200 Freighter 

series airplanes, Model A330–300 series 

airplanes, Model A340–200 series 

airplanes, and Model A340–300 series 

airplanes. This AD was prompted by a 

report that certain overheat detection 

system (OHDS) sensing elements, 

produced before January 31, 2021, may 

not properly detect thermal bleed leak 

events due to a quality escape during 

the manufacturing process. This AD 

requires a one-time special detailed 

inspection (SDI) for discrepancies of 

each affected part installed at an 

affected position, and replacement of 

discrepant parts, as specified in a 

European Union Aviation Safety Agency 

(EASA) AD, which is incorporated by 

reference. This AD would also prohibit 

the installation of affected parts. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective October 19, 

2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of October 19, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1051; 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, the mandatory 

continuing airworthiness information 

(MCAI), 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. 

Material Incorporated by Reference: 

• For EASA material incorporated by 

reference in this AD, contact EASA, 

Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 

8999 000; email ADs@easa.europa.eu; 

website easa.europa.eu. You may find 

this material on the EASA website at 

ad.easa.europa.eu. 

• For Kidde Aerospace & Defense 

service information incorporated by 

reference in this AD, contact Kidde 

Aerospace & Defense, 4200 Airport 

Drive NW, Building B, Wilson, NC 

27896; telephone 319–295–5000; 

website kiddetechnologies.com/ 

aviation.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 

regulations.gov under Docket No. FAA– 

2023–1051. 

FOR FURTHER INFORMATION CONTACT: 

Timothy Dowling, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 206–231–3667; email 

Timothy.P.Dowling@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 Airbus SAS Model A330– 

200 1 series airplanes, Model A330–200 

Freighter series airplanes, Model A330– 

300 series airplanes, Model A340–200 

series airplanes, and Model A340–300 

series airplanes. The NPRM published 

in the Federal Register on May 26, 2023 

(88 FR 34097). The NPRM was 

prompted by AD 2022–0243, dated 

December 8, 2022, issued by EASA, 

which is the Technical Agent for the 

Member States of the European Union 

(EASA AD 2022–0243) (also referred to 

as the MCAI). The MCAI states that the 

affected part manufacturer, Kidde 

Aerospace & Defense, reported that 

certain OHDS sensing elements, 

produced before January 31, 2021, may 

not properly detect thermal bleed leak 

events due to a quality escape during 

the manufacturing process. 

In the NPRM, the FAA proposed to 

require a one-time SDI for discrepancies 

of each affected part installed at an 

affected position, and replacement of 

discrepant parts, as specified in EASA 

AD 2022–0243. The NPRM also 

proposed to prohibit the installation of 


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63012 Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 

affected parts. The FAA is issuing this 

AD to address an air leak remaining 

undetected by the OHDS sensing 

element and not being isolated during 

flight. The unsafe condition, if not 

addressed, could possibly result in 

localized areas of the airplane being 

exposed to high temperatures, with 

consequent reduced structural integrity 

of the airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1051. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from Air 

Line Pilots Association, International 

(ALPA), who supported the NPRM 

without change. 

The FAA received additional 

comments from Airbus SAS. The 

following presents the comment 

received on the NPRM and the FAA’s 

response. 

Request To Correct the Referenced 

EASA AD Number 

Airbus SAS requested to correct the 

EASA AD number referenced in 

paragraph (h)(5) of the proposed AD. 

The reference to EASA AD 2022–0234 is 

a mistake as it should refer to EASA AD 

2022–0243. 

The FAA agrees that EASA AD 2022– 

0243 is correct for paragraph (h)(5) of 

this AD. The FAA has changed this AD 

accordingly. 

Conclusion 

This product has been approved by 

the aviation authority of another 

country and is 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 referenced above. The FAA 

reviewed the relevant data, considered 

the comments received, and determined 

that air safety requires adopting this AD 

as proposed. Accordingly, the FAA is 

issuing this AD to address the unsafe 

condition on this product. 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 

EASA 2022–0243 specifies 

procedures for a one-time SDI for 

discrepancies of each affected part 

installed at an affected position, and 

replacement of discrepant parts where 

the displayed electronic centralized 

aircraft monitoring (ECAM) warning is 

not related to results of a heat gun test 

at certain locations. EASA AD 2022– 

0243 also prohibits the installation of 

affected parts. 

The FAA reviewed Kidde Aerospace 

& Defense Service Bulletin CFD–26–3, 

dated January 13, 2022; and Revision 1, 

dated March 29, 2022, which identify 

affected OHDS sensing elements (those 

having certain part numbers and 

corresponding date codes). These 

documents are distinct because Revision 

1 corrects typographical errors and 

clarifies wording. 

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 119 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Up to 64 work-hours × $85 per hour = $5,440 ........................................................................... $0 $5,440 $647,360 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that would be required based on 

the results of any required actions. The 

FAA has no way of determining the 

number of aircraft that might need these 

on-condition actions: 

ESTIMATED COSTS OF ON-CONDITION ACTIONS

Labor cost Parts cost Cost per 

product 

13 work-hours × $85 per hour = $1,105 ................................................................................................................. * $ $1,105 

* The FAA has received no definitive data on which to base the parts cost. 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some or all 

of the costs of this AD may be covered 

under warranty, thereby reducing the 

cost impact on affected operators. 

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: 


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Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 63013 

(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: 

2023–17–03 Airbus SAS: Amendment 39– 

22529; Docket No. FAA–2023–1051; 

Project Identifier MCAI–2022–01565–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective October 19, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Airbus SAS 

airplanes specified in paragraphs (c)(1) 

through (5) of this AD, certificated in any 

category. 

(1) Model A330–201, –202, –203, –223, and 

–243 airplanes. 

(2) Model A330–223F and –243F airplanes. 

(3) Model A330–301, –302, –303, –321, 

–322, –323, –341, –342, and –343 airplanes. 

(4) Model A340–211, –212, and –213 

airplanes. 

(5) Model A340–311, –312, and –313 

airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 36, Pneumatic. 

(e) Unsafe Condition 

This AD was prompted by a report that 

certain overheat detection system (OHDS) 

sensing elements, produced before January 

31, 2021, may not properly detect the thermal 

bleed leak events due to a quality escape 

during the manufacturing process. The FAA 

is issuing this AD to address an air leak 

remaining undetected by the OHDS sensing 

element and not being isolated during flight. 

The unsafe condition, if not addressed, could 

possibly result in localized areas of the 

airplane being exposed to high temperatures, 

with consequent reduced structural integrity 

of the airplane. 

(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 2022–0243, dated 

December 8, 2022 (EASA AD 2022–0243). 

(h) Exceptions to EASA AD 2022–0243 

(1) Where EASA AD 2022–0243 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) This AD does not adopt the ‘‘Remarks’’ 

section of EASA AD 2022–0243. 

(3) Where EASA AD 2022–0243 defines 

‘‘affected part’’ and refers to ‘‘the VSB’’ for 

the part numbers and date codes, for this AD, 

use Kidde Aerospace & Defense Service 

Bulletin CFD–26–3, dated January 13, 2022; 

or Revision 1, dated March 29, 2022, as ‘‘the 

VSB’’ for the part numbers and date codes. 

(4) Where EASA AD 2022–0243 defines 

Groups, replace the text ‘‘the SB’’ with 

‘‘Airbus Service Bulletin A330–36–3052, 

dated June 27, 2022; or Airbus SB A340–36– 

4036, dated June 27, 2022; as applicable.’’ 

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

0243 specifies action if ‘‘any discrepancy as 

defined in the SB is detected,’’ for this AD 

a discrepancy is when the displayed 

electronic centralized aircraft monitoring 

(ECAM) warning is not related to results of 

a heat gun test at certain location. 

(i) No Reporting Requirement and No Return 

of Parts 

(1) Although the service information 

referenced in EASA AD 2022–0243 specifies 

to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(2) Although the service information 

referenced in EASA AD 2022–0243 specifies 

to return certain parts to the manufacturer, 

this AD does not include that requirement. 

(j) Additional AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, 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 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-AIR-730-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, International Validation 

Branch, FAA; or EASA; Airbus SAS’s EASA 

Design Organization Approval (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) Additional Information 

For more information about this AD, 

contact Timothy Dowling, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 206– 

231–3667; email Timothy.P.Dowling@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 2022–0243, dated December 8, 

2022. 

(ii) Kidde Aerospace & Defense Service 

Bulletin CFD–26–3, dated January 13, 2022. 

(iii) Kidde Aerospace & Defense Service 

Bulletin CFD–26–3, Revision 1, dated March 

29, 2022. 

Note 1 to paragraph (l)(2)(iii): The revision 

level of this document is identified on only 

the transmittal page; no other page of the 

document contains this information. 

(3) For EASA AD 2022–0243, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

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

easa.europa.eu. You may find this EASA AD 

on the EASA website at ad.easa.europa.eu. 

(4) For Kidde Aerospace & Defense service 

information, contact Kidde Aerospace & 

Defense, 4200 Airport Drive NW, Building B, 

Wilson, NC 27896; telephone 319–295–5000; 

website kiddetechnologies.com/aviation.com. 

(5) 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. 

(6) You may view this material that is 

incorporated by reference at the National 

Archives and Records Administration 

(NARA). For information on the availability 


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63014 Federal Register / Vol. 88, No. 177 / Thursday, September 14, 2023 / Rules and Regulations 

of this material at NARA, email 

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

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

Issued on September 7, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–19898 Filed 9–13–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1208; Project 

Identifier AD–2023–00325–E; Amendment 

39–22545; AD 2023–18–04] 

RIN 2120–AA64 

Airworthiness Directives; General 

Electric Company Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

General Electric Company (GE) Model 

CF6–80E1A2, CF6–80E1A3, CF6– 

80E1A4, and CF6–80E1A4/B engines. 

This AD was prompted by a 

manufacturer investigation that revealed 

that a certain forward outer seal and 

certain high-pressure turbine rotor 

(HPTR) stage 1 disks and rotating seals 

were manufactured from material 

suspected to contain iron inclusion, 

which may cause reduced material 

properties and a lower fatigue life 

capability. This AD requires the 

replacement of the affected forward 

outer seal, HPTR stage 1 disks, and 

rotating seals. The FAA is issuing this 

AD to address the unsafe condition on 

these products. 

DATES: This AD is effective October 19, 

2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1208; 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: 

Alexei Marqueen, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, 

Des Moines, WA 98198; phone: (781) 

238–7178; email: alexei.t.marqueen@

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 GE Model CF6–80E1A2, 

CF6–80E1A3, CF6–80E1A4, and CF6– 

80E1A4/B engines. The NPRM 

published in the Federal Register on 

June 9, 2023 (88 FR 37812). The NPRM 

was prompted by a report from the 

manufacturer that a certain forward 

outer seal and certain HPTR stage 1 

disks and rotating seals were made from 

billets manufactured from material that 

is suspected to contain iron inclusion. 

Such iron inclusion may cause 

premature fracture and subsequent 

uncontained failure. The FAA has 

determined that the operators with 

affected HPTR stage 1 disks have 

proactively removed these parts from 

service. As a result, the compliance time 

for removal and replacement of the 

affected HPTR stage 1 disks is before 

further flight. This condition, if not 

addressed, could result in uncontained 

debris release, damage to the engine, 

and damage to the aircraft. In the 

NPRM, the FAA proposed to require the 

removal of a certain forward outer seal 

and certain HPTR stage 1 disks and 

rotating seals from service and 

replacement with parts eligible for 

installation. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

two commenters. The commenters were 

Delta Air Lines, Inc. (DAL) and EVA 

Air. The following presents the 

comments received on the NPRM and 

the FAA’s response to each comment. 

No Affected Parts 

EVA Air commented that its fleet does 

not have any affected parts. The FAA 

acknowledges this comment. 

Request To Expand Applicability and 

Add Parts Prohibition Requirement 

DAL commented that according to the 

engine illustrated parts catalog, the 

R88DT rotor on the CF6–80E1 fleet of 

engines could be installed on the CF6– 

80C2 fleet of engines, specifically on the 

–B2F, –B4F, –B6F, –B7F, and –B8F 

variants. The commenter reasoned that 

without a part installation prohibition 

in the proposed AD, the affected parts 

would be eligible for installation on the 

non-CF6–80E1 engines after the 

required removal action in the AD. DAL 

requested that the FAA revise the 

proposed AD to add certain engine 

variants to paragraph (c), Applicability, 

and to add a parts installation 

prohibition to paragraph (g), Required 

Actions, to prevent installation of the 

removed parts on non-CF6–80E1 

engines. 

The FAA disagrees. This AD applies 

to engine models known to have 

affected parts installed. Paragraph (g) of 

this AD requires the removal of the 

affected parts from service. Since the 

FAA and the manufacturer know where 

these parts are, and parts removed from 

service by AD action are not serviceable 

and not eligible for re-installation on 

any engine, it is not necessary to revise 

paragraph (c) of this AD to add engine 

variants and revise paragraph (g) of this 

AD to prohibit installation of the 

removed parts. Additionally, adding 

new engine variants to this AD would 

delay final issuance of this AD, as such 

a change would increase the scope of 

this AD, requiring new notice and 

comment. We may consider separate 

rulemaking, however. The FAA did not 

change this AD as a result of these 

comments. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting this AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. 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. 

Interim Action 

The FAA considers this AD to be an 

interim action. This unsafe condition is 

still under investigation by the 

manufacturer and, depending on the 

results of that investigation, the FAA 

may consider further rulemaking action. 

Costs of Compliance 

The FAA estimates that this AD 

affects 1 engine installed on airplanes of 

U.S. registry. This engine requires 

replacement of the rotating seal. The 

FAA estimates that there are no engines 

installed on airplanes of U.S. registry 

that requires replacement of the forward 

outer seal or HPTR stage 1 disk. 

The FAA estimates the following 

costs to comply with this AD: 


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