8914 Federal Register / Vol. 90, No. 22 / Tuesday, February 4, 2025 / Proposed Rules 

paragraph (1)(a) and § 25.335(b)(2) 

without the benefit of the high-speed 

protection system. 

(4) Master minimum equipment list 

(MMEL) relief for the high-speed 

protection system may be considered by 

the FAA Flight Operations Evaluation 

Board (FOEB) provided that the flight 

manual instructions indicate reduced 

maximum operating speeds as described 

in paragraph (3), and that no additional 

hazards are introduced with the highspeed protection system inoperative. In 

addition, the cockpit display of the 

reduced operating speeds, as well as the 

overspeed warning for exceeding those 

speeds, must be equivalent to that of the 

normal airplane with the high-speed 

protection system operative. 

Issued in Kansas City, Missouri, on 

signature January 30, 2025. 

Patrick R. Mullen, 

Manager, Technical Policy Branch, Policy and 

Standards Division, Aircraft Certification 

Service. 

[FR Doc. 2025–02214 Filed 2–3–25; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1884; Project 

Identifier AD–2023–00948–T] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Proposed rule; withdrawal. 

SUMMARY: The FAA is withdrawing a 

notice of proposed rulemaking (NPRM) 

that proposed to supersede 

Airworthiness Directive (AD) 2023–08– 

04, which applies to certain The Boeing 

Company Model 787–8, 787–9, and 

787–10 airplanes. The NPRM was 

prompted by reports of a loss of water 

pressure during flight and water leaks 

that affected multiple pieces of 

electronic equipment, and by the 

discovery that some clamshell couplings 

did not have the required safety strap. 

The NPRM would have required 

inspecting all door 1 and door 3 lavatory 

and galley potable water systems for 

missing or incorrectly installed 

clamshell couplings, inspecting all 

clamshell couplings for the presence 

and correct installation of safety straps 

at door 1 and door 3 lavatories and 

galleys with a potable water system, and 

performing applicable on-condition 

actions. The NPRM would have also 

prohibited the installation of affected 

parts at inspection locations and 

removed Model 787–10 airplanes from 

the applicability. Since issuance of the 

NPRM, the FAA has determined that the 

identified service information may not 

adequately address the unsafe condition 

on one of the galleys, and Model 787– 

10 airplanes should be included in the 

applicability. Accordingly, the NPRM is 

withdrawn. 

DATES: As of February 4, 2025, the 

proposed rule, which was published in 

the Federal Register on July 15, 2024 

(89 FR 57374), is withdrawn. 

ADDRESSES: AD Docket: You may 

examine the AD docket at 

regulations.gov by searching for and 

locating Docket No. FAA–2024–1884; 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 action, any 

comments received, and other 

information. The street address for 

Docket Operations is Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE, Washington, DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Courtney Tuck, Aviation Safety 

Engineer, FAA, 2200 South 216th St., 

Des Moines, WA 98198; phone: 206– 

231–3986; email: Courtney.K.Tuck@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued an NPRM to amend 

14 CFR part 39 to supersede AD 2023– 

08–04, Amendment 39–22419 (88 FR 

33823, May 25, 2023) (AD 2023–08–04). 

AD 2023–08–04 applied to certain The 

Boeing Company Model 787–8, 787–9, 

and 787–10 airplanes. The NPRM was 

published in the Federal Register on 

July 15, 2024 (89 FR 57374). The NPRM 

was prompted by reports of a loss of 

water pressure during flight and water 

leaks that affected multiple pieces of 

electronic equipment. The NPRM was 

further prompted by the discovery that 

some clamshell couplings did not have 

the required safety strap and by the 

development of a design solution that 

replaces the strapless clamshell 

couplings with clamshell couplings that 

have safety straps to address the unsafe 

condition. In the NPRM, the FAA 

proposed to continue to require 

inspecting all door 1 and door 3 lavatory 

and galley potable water systems for 

missing or incorrectly installed 

clamshell couplings, and performing 

applicable on-condition actions. The 

NPRM also proposed to require 

inspecting all clamshell couplings for 

the presence and correct installation of 

safety straps at door 1 and door 3 

lavatories and galleys with a potable 

water system, and performing 

applicable on-condition actions. The 

NPRM would have also prohibited the 

installation of affected parts at 

inspection locations and removed 

Model 787–10 airplanes from the 

applicability. 

The proposed actions were intended 

to address water leaks and water 

migration to critical flight equipment, 

which may affect the continued safe 

flight and landing of the airplane. 

Actions Since the NPRM Was Issued 

Since issuance of the NPRM, Boeing 

advised the FAA that an inspection area 

is missing from Boeing Alert 

Requirements Bulletin B787–81205– 

SB250299–00 RB, Issue 001, dated July 

31, 2023(as specified in paragraph (j) of 

the proposed AD). As a result, the 

NPRM may not adequately address the 

unsafe condition on one of the galleys. 

Specifically, Task 3, Figure 10, needs to 

be updated to add an inspection area to 

the FWD galley located at Door 1. 

According to Boeing, the current figure 

specifies inspection of only Detail K, the 

area above the galley carts, so Detail L 

will be added in a revised requirements 

bulletin to specify an inspection of the 

area behind all of the galley carts. 

Boeing anticipates release of the revised 

bulletin in the middle of 2025. 

Since the NPRM does not address the 

unsafe condition and the unsafe 

condition still exists, the FAA is 

withdrawing the NPRM and considering 

additional rulemaking to require the 

revised service information. The FAA 

has determined that any new AD will be 

issued within the timeframe established 

by the safety assessment. 

Withdrawal of the NPRM constitutes 

only such action and does not preclude 

the FAA from further rulemaking on 

this issue, nor does it commit the FAA 

to any course of action in the future. 

Comments 

The FAA received comments from 

United Airlines, the Air Line Pilots 

Association, International (ALPA), and 

an individual, who supported the 

NPRM without change. 

The FAA also received a comment 

from The Boeing Company. The 

following presents the comment 

received on the NPRM and the FAA’s 

response to the comment. 

Request To Include Model 787–10 

Airplanes 

Boeing noted that some Model 787–10 

airplanes could be in storage or are 

otherwise inactive and requested that 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 90, No. 22 / Tuesday, February 4, 2025 / Proposed Rules 8915 

the proposed AD clarify that those 

airplanes that have not yet met the 

requirements of AD 2023–08–04 must 

still meet the inspection requirements of 

Boeing Alert Requirements Bulletin 

B787–81205–SB380021–00 RB, Issue 

001, dated August 12, 2022. 

The FAA agrees that the applicability 

of the NPRM did not include Model 

787–10 airplanes. Those airplanes had 

been removed from the applicability of 

the proposed AD because Boeing had 

originally stated that Model 787–10 

airplanes were delivered with safetystrap clamshell couplings on affected 

potable water lines, so those airplanes 

were not included in Boeing 

Requirements Bulletin B787–81205– 

SB250299–00 RB, Issue 001, dated July 

31, 2023 (the service information 

specified in paragraph (j) of the 

proposed AD). Accordingly, the NPRM 

stated that Model 787–10 airplanes were 

no longer subject to the unsafe 

condition and therefore not included in 

the applicability. However, as Boeing 

stated, there is a possibility that some 

Model 787–10 airplanes may have been 

in storage and not inspected as required 

by AD 2023–08–04 (and restated in 

retained paragraph (g) of the proposed 

AD). Therefore, if appropriate, those 

airplanes will be included in future 

rulemaking that addresses the unsafe 

condition. Because the NPRM is 

withdrawn, no further action is 

necessary for this NPRM. 

FAA’s Conclusions 

Upon further consideration, the FAA 

has determined that the NPRM would 

not adequately address the identified 

unsafe condition. Accordingly, the 

NPRM is withdrawn. AD 2023–08–04 

remains in effect unless it is later 

superseded. 

Regulatory Findings 

Since this action only withdraws an 

NPRM, it is neither a proposed nor a 

final rule. This action therefore is not 

covered under Executive Order 12866, 

the Regulatory Flexibility Act, or DOT 

Regulatory Policies and Procedures (44 

FR 11034, February 26, 1979). 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Withdrawal 

■ Accordingly, the notice of proposed 

rulemaking (Docket No. FAA–2024– 

1884), which was published in the 

Federal Register on July 15, 2024 (89 FR 

57374), is withdrawn. 

Issued on January 28, 2025. 

Suzanne Masterson, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2025–02069 Filed 2–3–25; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2025–0016; Project 

Identifier MCAI–2023–01047–T] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc., Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain Bombardier, Inc., Model BD– 

700–1A10 and BD–700–1A11 airplanes. 

This proposed AD was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. This proposed AD would 

require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations. 

The FAA is proposing this AD to 

address the unsafe condition on these 

products. 

DATES: The FAA must receive comments 

on this proposed AD by March 21, 2025. 

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 

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. 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2025–0016; 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 NPRM, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For Bombardier material identified 

in this proposed AD, contact 

Bombardier Business Aircraft Customer 

Response Center, 400 Coˆte-Vertu Road 

West, Dorval, Que ́bec H4S 1Y9, Canada; 

phone 514–855–2999; email ac.yul@

aero.bombardier.com; website 

bombardier.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. 

FOR FURTHER INFORMATION CONTACT: 

Mark Taylor, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; phone: 516–228– 

7300; email: 9-avs-nyaco-cos@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written relevant data, views, or 

arguments about this proposal. Send 

your comments to an address listed 

under the ADDRESSES section. Include 

‘‘Docket No. FAA–2025–0016; Project 

Identifier MCAI–2023–01047–T’’ at the 

beginning of your comments. The most 

helpful comments reference a specific 

portion of the proposal, 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 the 

proposal 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 

regulations.gov, including any personal 

information you provide. The agency 

will also post a report summarizing each 

substantive verbal contact received 

about this NPRM. 

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 NPRM 

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 NPRM, it is important 

that you clearly designate the submitted 

comments as CBI. Please mark each 


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