Federal Register / Vol. 88, No. 192 / Thursday, October 5, 2023 / Rules and Regulations 69015 

(h) Exceptions to EASA AD 2022–0185 

(1) Where EASA AD 2022–0185 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 2022–0185. 

(3) Where EASA AD 2022–0185 specifies 

to modify ‘‘in accordance with the 

instructions of the SB, or contact Airbus for 

approved instructions whenever necessary,’’ 

this AD requires obtaining instructions before 

further flight using the procedures specified 

in paragraph (i)(2) of this AD if any actions 

cannot be done in accordance with the 

instructions of the SB. 

(i) 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 (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 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 (i)(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. 

(j) Additional Information 

For more information about this AD, 

contact Erik Bedillion, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; phone 404–474– 

5583; email Erik.Bedillion@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 2022–0185, dated September 5, 

2022. 

(ii) [Reserved] 

(3) For EASA AD 2022–0185, 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 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: 

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

Issued on September 27, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–22080 Filed 10–4–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1213; Project 

Identifier MCAI–2022–01615–T; Amendment 

39–22561; AD 2023–20–02] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2022–18– 

12, which applied to all Airbus SAS 

Model A330–841 and –941 airplanes. 

AD 2022–18–12 required installing 

serviceable engine electronic control 

(EEC) software or EEC units having the 

serviceable software, limiting certain 

parts installation configurations, and 

prior or concurrent modification of EEC 

software. This AD was prompted by a 

determination that engine crystal icing 

protection could be (temporarily) lost if 

an erroneous total pressure value is 

provided by the airplane system, which 

is addressed through EEC software. This 

AD continues to require certain actions 

in AD 2022–18–12 and requires adding 

new limitations for intermixing of 

certain EEC software standards and a 

new operational limitation for engines 

with certain EEC software installed, as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

incorporated by reference. This AD also 

prohibits the installation of certain 

engines under certain conditions. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective November 9, 

2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 9, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1213; 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 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. 

• 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– 

2023–1213. 

FOR FURTHER INFORMATION CONTACT: Tim 

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 to supersede AD 2022–18–12, 

Amendment 39–22163 (87 FR 56561, 

September 15, 2022) (AD 2022–18–12). 

AD 2022–18–12 applied to all Airbus 

SAS Model A330–841 and –941 

airplanes. 2022–18–12 required 

installing serviceable EEC software or 


ddrumheller on DSK120RN23PROD with RULES1
69016 Federal Register / Vol. 88, No. 192 / Thursday, October 5, 2023 / Rules and Regulations 

EEC units having the serviceable 

software, limiting certain parts 

installation configurations, and prior or 

concurrent modification of EEC 

software. The FAA issued AD 2022–18– 

12 to address erroneous electronic 

centralized airplane monitoring (ECAM) 

engine oil pressure warnings, which 

could lead to dual engine in-flight 

shutdown and result in reduced control 

of the airplane. 

The NPRM published in the Federal 

Register on June 16, 2023 (88 FR 39379). 

The NPRM was prompted by AD 2022– 

0253, dated December 19, 2022 (EASA 

AD 2022–0253) (also referred to as the 

MCAI), issued by EASA, which is the 

Technical Agent for the Member States 

of the European Union. The MCAI states 

that it has been determined that engine 

crystal icing protection could be 

(temporarily) lost if an erroneous total 

pressure value is provided by the 

airplane system, which, if not corrected, 

also could lead to dual engine in-flight 

shutdown and result in reduced control 

of the airplane. To address this unsafe 

condition, Rolls-Royce developed new 

EEC full-authority digital engine control 

software (EEC standard 5.3) for the 

affected Trent 7000 engines. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1213. 

In the NPRM, the FAA proposed to 

continue certain actions in AD 2022– 

18–12. The NPRM also proposed to 

require adding new limitations for 

intermixing of certain EEC software 

standards, and an operational limitation 

for airplanes having an engine with 

certain EEC software installed, as 

specified in EASA AD 2022–0253. The 

NPRM also proposed to prohibit the 

installation of certain engines under 

certain conditions. 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 Air 

Line Pilots Association, International 

(ALPA), who supported the NPRM 

without change. 

The FAA received additional 

comments from a commenter, Delta Air 

Lines (Delta). The following presents the 

comments received on the NPRM and 

the FAA’s response to each comment. 

Request for Exception to Operational 

Limitations 

Delta requested adding an exception 

to the operational limitations described 

in paragraph (7) of EASA AD 2022– 

0253, which Delta stated prohibits 

intermixing of software once the 

airplane has been modified to install 

EEC SW standard 5.3 on both engines. 

Delta stated that paragraph (7) of EASA 

AD 2022–0253 contradicts paragraph (4) 

of EASA AD 2022–0253, which allows 

intermixing certain software standards. 

Delta requested that the exception allow 

installation of an affected EEC unit, 

software, or engine if the airplane is 

operated under certain operational 

requirements. Delta reasoned that 

because the software can be installed on 

individual engines or EECs, an affected 

EEC unit or engine should be permitted 

to be installed on a modified airplane 

(i.e., go from having both engines 

updated and unaffected to having only 

one engine updated) as long as the 

configuration meets intermixing or 

interchangeability requirements and the 

2-year limit specified in paragraph (6) of 

EASA AD 2022–0253 is not exceeded. 

Delta pointed out that allowing this 

would promote operational flexibility if 

an updated EEC unit or engine needs to 

be replaced and the only available EEC 

unit or engine has not been updated to 

EEC software standard 5.3. Delta added 

that it made a similar comment during 

EASA’s rulemaking process for EASA 

AD 2022–0253 and that EASA clarified 

that paragraph (7) of EASA AD 2022– 

0253 didn’t prohibit re-installing 

affected EEC software on the airplane. 

Delta recommended revising the 

Background section, Related Service 

Information Under 1 CFR part 51 

section, and paragraph (h) of the 

proposed AD with the exceptions or 

clarifying changes. 

The FAA agrees to clarify. Paragraph 

(7) of EASA AD 2022–0253 simply 

provides an acceptable method to 

comply with the operational limitations 

in paragraph (6) of EASA AD 2022– 

0253, which only becomes effective 2 

years after the effective date of this AD. 

Paragraph (7) of EASA AD 2022–0253 

does not prohibit intermixing or 

interchangeability before that date, but 

instead clarifies that changing the 

modified airplane configuration to 

install an affected EEC unit or engine 

would mean the airplane no longer 

complies with the operational 

limitations in paragraph (6) of EASA AD 

2022–0253. The FAA has not changed 

this AD in this regard. 

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, 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 AD 2022–0253 specifies 

procedures for limitations for 

intermixing of certain EEC software and 

an operational limitation for engines 

with certain EEC software installed. 

EASA AD 2022–0253 specifies that 

installation of serviceable EEC software 

is acceptable for compliance with 

(terminates) the operational limitation, 

provided that no affected EEC software, 

affected EEC unit, or affected engine is 

subsequently installed on the airplane. 

EASA AD 2022–0253 also prohibits the 

installation of engines with certain EEC 

software. 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 20 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 

Retained actions from AD 2022–18–12 (parts limitations).1 work-hours × $85 per hour = $85 ........ $0 $85 $1,700 


ddrumheller on DSK120RN23PROD with RULES1
Federal Register / Vol. 88, No. 192 / Thursday, October 5, 2023 / Rules and Regulations 69017 

ESTIMATED COSTS FOR REQUIRED ACTIONS—Continued 

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

New actions ........................................................... Up to 25 work-hours × $85 per hour = 

$2,125.

* 0 2,125 42,500 

* The FAA has received no definitive data on which to base the cost estimates for the parts specified in this AD. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

The FAA is issuing this rulemaking 

under the authority described in 

Subtitle VII, Part A, Subpart III, Section 

44701: General requirements. Under 

that section, Congress charges the FAA 

with promoting safe flight of civil 

aircraft in air commerce by prescribing 

regulations for practices, methods, and 

procedures the Administrator finds 

necessary for safety in air commerce. 

This regulation is within the scope of 

that authority because it addresses an 

unsafe condition that is likely to exist or 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by: 

■ a. Removing Airworthiness Directive 

(AD) 2022–18–12, Amendment 39– 

22163 (87 FR 56561, September 15, 

2022); and 

■ b. Adding the following new AD: 

2023–20–02 Airbus SAS: Amendment 39– 

22561; Docket No. FAA–2023–1213; 

Project Identifier MCAI–2022–01615–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective November 9, 2023. 

(b) Affected ADs 

This AD replaces AD 2022–18–12, 

Amendment 39–22163 (87 FR 56561, 

September 15, 2022) (AD 2022–18–12). 

(c) Applicability 

This AD applies to all Airbus SAS Model 

A330–841 and –941 airplanes, certificated in 

any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 73, Engine Fuel and Control. 

(e) Unsafe Condition 

This AD was prompted by a determination 

that engine crystal icing protection could be 

(temporarily) lost if an erroneous total 

pressure value is provided by the airplane 

system and the engine electronic control 

(EEC) software used to correct the system 

requires modification. This modification may 

conflict with EEC software to address 

erroneous electronic centralized airplane 

monitoring (ECAM) engine oil pressure 

warnings. The FAA is issuing this AD to 

address erroneous total pressure values being 

provided by the airplane system and any EEC 

software that should not be intermixed. The 

unsafe condition, if not addressed, could 

result in dual engine in-flight shut-down, and 

subsequent reduced control 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 2022–0253, dated 

December 19, 2022 (EASA AD 2022–0253). 

(h) Exceptions to EASA AD 2022–0253 

(1) Where EASA AD 2022–0253 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) Where EASA AD 2022–0253 refers to 

‘‘10 September 2021,’’ this AD requires using 

October 20, 2022 (the effective date of AD 

2022–18–12). 

(3) Where EASA AD 2022–0253 refers to 

‘‘10 September 2023,’’ this AD requires using 

October 20, 2024 (24 months after October 

20, 2022, the effective date of AD 2022–18– 

12). 

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

section of EASA AD 2022–0253. 

(i) 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 (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 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 (i)(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. 


ddrumheller on DSK120RN23PROD with RULES1
69018 Federal Register / Vol. 88, No. 192 / Thursday, October 5, 2023 / Rules and Regulations 

(j) Additional Information 

For more information about this AD, 

contact Tim Dowling, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 206– 

231–3667; email timothy.p.dowling@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 this AD specifies otherwise. 

(i) European Union Aviation Safety Agency 

(EASA) AD 2022–0253, dated December 19, 

2022. 

(ii) [Reserved] 

(3) For EASA AD 2022–0253, 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 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: 

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

Issued on September 27, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–22078 Filed 10–4–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1501; Project 

Identifier MCAI–2023–00647–T; Amendment 

39–22560; AD 2023–20–01] 

RIN 2120–AA64 

Airworthiness Directives; Airbus 

Canada Limited Partnership (Type 

Certificate Previously Held by C Series 

Aircraft Limited Partnership (CSALP); 

Bombardier, Inc.) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Airbus Canada Limited Partnership 

Model BD–500–1A10 and BD–500– 

1A11 airplanes. This AD was prompted 

by a report the engine fire extinguishing 

control and indication system did not 

illuminate correctly. This AD requires 

installing a software update to the 

integrated cockpit control panel (ICCP) 

remote data concentrator (RDC), as 

specified in a Transport Canada AD, 

which is incorporated by reference. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective November 9, 

2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 9, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1501; 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 material incorporated by 

reference in this AD, contact Transport 

Canada, Transport Canada National 

Aircraft Certification, 159 Cleopatra 

Drive, Nepean, Ontario K1A 0N5, 

Canada; telephone 888–663–3639; email 

TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca; 

website tc.canada.ca/en/aviation. 

• You may view this material at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th Street, 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– 

2023–1501. 

FOR FURTHER INFORMATION CONTACT: 

William Reisenauer, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 516–228–7300; email: 9-avsnyaco-cos@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 Airbus Canada Limited 

Partnership Model BD–500–1A10 and 

BD–500–1A11 airplanes. The NPRM 

published in the Federal Register on 

July 20, 2023 (88 FR 46702). The NPRM 

was prompted by AD CF–2023–28, 

dated May 4, 2023, issued by Transport 

Canada, which is the aviation authority 

for Canada (Transport Canada AD CF– 

2023–28) (also referred to as the MCAI). 

The MCAI states a deficiency in the 

design of the engine fire extinguishing 

control and indication system was 

discovered. After the loss of one hot 

battery DC bus, the AVAIL legend on 

BTL 1 and BTL 2 push button 

annunciators (PBAs) will not illuminate 

green upon pressing the corresponding 

ENG FIRE PBA. This condition affects 

both L ENG FIRE and R ENG FIRE PBAs 

on the overhead panel. The misleading 

indication given by the AVAIL legend 

on BTL 1 and BTL 2 PBAs will affect the 

crew’s assessment of the situation. The 

crew may hesitate to extinguish an 

engine fire despite having access to a 

functional engine fire extinguishing 

system, or may reselect the FIRE PBA, 

resulting in loss of the ability to isolate 

and extinguish the fire. 

In the NPRM, the FAA proposed to 

require installing a software update to 

the ICCP RDC, as specified in Transport 

Canada AD CF–2023–28. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1501. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received one comment from 

Air Line Pilots Association, 

International (ALPA) who supported the 

NPRM without change. 

The FAA received an additional 

comment from Delta Air Lines (Delta). 

The following presents the comment 

received on the NPRM and the FAA’s 

response. 

Request To Clarify Software 

Installation Requirements 

Delta requested that an additional 

exception be added to paragraph (h) of 

the proposed AD to clarify that it is 

acceptable to use a different method of 

upgrading the software, using Airbus 

Canada Limited Partnership Service 

Bulletin BD500–311001, Issue 001, 

dated March 14, 2023, only as a 

reference. Delta explained that it has a 

different policy for installing software 

that requires the use of a Portable 

Maintenance Access Terminal (PMAT), 

model PMAT2000, instead of a USB 

device. 

The FAA partially agrees with the 

proposed changes. The FAA agrees to 

clarify that the PMAT method is 


ddrumheller on DSK120RN23PROD with RULES1