24034 Federal Register / Vol. 87, No. 78 / Friday, April 22, 2022 / Rules and Regulations 

(g)(1) through (4) of this AD at intervals not 

exceeding 3 years or 1,500 FHs, whichever 

comes first, from the previous inspection. 

(6) If a propeller blade fails any inspection 

required by this AD, based on the criteria in 

Accomplishment Instructions, paragraph 

3.C.(5)(g) of Hamilton Sundstrand ASB 

54H60–61–A154, Revision 1, dated May 29, 

2020, and paragraph 3.C.(5)(j) of Hamilton 

Sundstrand ASB 54H60–61–A155, dated May 

29, 2020, remove the blade from service 

before further flight and replace with a blade 

eligible for installation. 

(7) Report the results of the ECI required 

by paragraphs (g)(1) through (5) of this AD in 

accordance with the Accomplishment 

Instructions, paragraph 3.C.(6), of Hamilton 

Sundstrand ASB 54H60–61–A154, Revision 

1, dated May 29, 2020. 

(h) Installation Prohibition 

(1) After the effective date of this AD, do 

not install onto any propeller a Hamilton 

Sundstrand propeller blade identified in 

paragraphs (g)(1) through (3) of this AD, 

unless the blade has first passed the initial 

inspection required by paragraphs (g)(1) 

through (4) of this AD. 

(2) After the effective date of this AD, do 

not install any propeller assembly with a 

propeller blade identified in paragraphs (g)(1) 

through (3) of this AD onto any aircraft 

unless the propeller blades have first passed 

the initial inspection required by paragraphs 

(g)(1) through (4) of this AD. 

Note to paragraph (h)(2): Operators may 

install a propeller assembly with a propeller 

blade identified in paragraphs (g)(1) through 

(3) of this AD if the propeller blade assembly 

is not disassembled and the propeller blades 

are not yet due for an ECI as required by 

paragraphs (g)(1) through (4) of this AD. 

(i) Credit for Previous Actions 

You may take credit for the initial ECI of 

a propeller blade required by paragraphs 

(g)(1) and (2) of this AD and the replacement 

of a propeller blade required by paragraph 

(g)(6) of this AD if the actions were 

completed before the effective date of this AD 

using Hamilton Sundstrand ASB 54H60–61– 

A154, dated August 26, 2019. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Boston ACO Branch, 

FAA, has the authority to approve AMOCs 

for this AD, if requested using the procedures 

found in 14 CFR 39.19. In accordance with 

14 CFR 39.19, send your request to your 

principal inspector or local Flight Standards 

District Office, as appropriate. If sending 

information directly to the manager of the 

certification office, send it to the attention of 

the person identified in paragraph (k) of this 

AD. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(k) Related Information 

For more information about this AD, 

contact Michael Schwetz, Aviation Safety 

Engineer, Boston ACO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7761; fax: (781) 238–7199; 

email: 9-AVS-AIR-BACO-COS@faa.gov. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless the AD specifies otherwise. 

(i) Hamilton Sundstrand Alert Service 

Bulletin (ASB) 54H60–61–A154, Revision 1, 

dated May 29, 2020. 

(ii) Hamilton Sundstrand ASB 54H60–61– 

A155, dated May 29, 2020. 

(3) For service information identified in 

this AD, contact Hamilton Sundstrand, 1 

Hamilton Road, Windsor Locks, CT 06096– 

1010; phone: (877) 808–7575; email: CRC@

collins.com. 

(4) 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. 

(5) You may view this service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

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

https://www.archives.gov/federal-register/cfr/ 

ibr-locations.html. 

Issued on April 7, 2022. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–08539 Filed 4–21–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–1169; Project 

Identifier AD–2021–01011–T; Amendment 

39–22008; AD 2022–08–05] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 737–800 

series airplanes. This AD was prompted 

by the determination that insufficient 

sealing may allow water to enter the 

lower lobe electronic equipment (EE) 

bay through the main deck floor 

structure at the rigid cargo barrier (RCB), 

which could cause damage to EE bay 

line replacement units (LRUs) in the E5 

rack. This AD requires detailed 

inspections for the presence and 

condition of sealant at certain locations 

and applicable on-condition actions. 

This AD also requires replacing the 

moisture barrier tape at a certain 

location, replacing the weather seal at a 

certain location, and installing seat track 

fillers. The FAA is issuing this AD to 

address the unsafe condition on these 

products. 

DATES: This AD is effective May 27, 

2022 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of May 27, 2022. 

ADDRESSES: For service information 

identified in this final rule, contact 

Boeing Commercial Airplanes, 

Attention: Contractual & Data Services 

(C&DS), 2600 Westminster Blvd., MC 

110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; internet 

https://www.myboeingfleet.com. 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. 

It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

1169. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–1169; 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: 

Courtney Tuck, Aerospace Engineer, 

Cabin Safety and Environmental 

Systems Section, FAA, Seattle ACO 

Branch, 2200 South 216th St., Des 

Moines, WA 98198; phone and fax: 206– 

231–3986; email: courtney.k.tuck@

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 The Boeing Company 

Model 737–800 series airplanes. The 


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Federal Register / Vol. 87, No. 78 / Friday, April 22, 2022 / Rules and Regulations 24035 

NPRM published in the Federal 

Register on January 26, 2022 (87 FR 

3946). The NPRM was prompted by the 

determination that insufficient sealing 

may allow water to enter the lower lobe 

EE bay through the main deck floor 

structure at the RCB, which could cause 

damage to EE bay LRUs in the E5 rack. 

In the NPRM, the FAA proposed to 

require detailed inspections for the 

presence and condition of sealant at 

certain locations and applicable oncondition actions. The NPRM also 

proposed to require replacing the 

moisture barrier tape at a certain 

location, replacing the weather seal at a 

certain location, and installing seat track 

fillers. The FAA is issuing this AD to 

address water ingress in the lower lobe 

EE bay, which could result in water 

damage to the air data inertial reference 

units and flight management computers 

during flight, leading to a complete loss 

of data to primary flight displays and 

electronic navigation functions, which 

could prevent continued safe flight and 

landing. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from Air 

Line Pilots Association, International 

(ALPA), Boeing, and an individual, who 

supported the NPRM without change. 

The FAA received an additional 

comment from Aviation Partners Boeing 

(APB). The following presents the 

comment received on the NPRM and the 

FAA’s response to the comment. 

Effect of Winglets on Accomplishment 

of the Proposed Actions 

APB stated that the installation of 

winglets per Supplemental Type 

Certificate (STC) ST00830SE does not 

affect compliance with the mandated 

actions in the proposed rule. 

The FAA agrees with the commenter. 

Therefore, the installation of STC 

ST00830SE does not affect the ability to 

accomplish the actions required by this 

AD. The FAA has not changed this AD 

in this regard. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting this AD as proposed. 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 

The FAA reviewed Boeing Alert 

Requirements Bulletin 737–53A1401 

RB, dated April 27, 2021. This service 

information specifies procedures for 

detailed inspections of the forward main 

deck cargo compartment floor to RCB, 

floor panel joints, drain troughs, seat 

track splices, and, for some airplanes, 

the lower lobe E5 rack drain pan shroud 

for sealant condition and application, 

and applicable on-condition actions. 

This service information also specifies 

procedures for replacing the main deck 

cargo door weather seal, replacing the 

moisture barrier tape on the forward 

main deck cargo compartment floor, and 

installing seat track fillers in the EE bay. 

On-condition actions include repair, 

removing existing sealant, and applying 

new sealant. This service information is 

reasonably available because the 

interested parties have access to it 

through their normal course of business 

or by the means identified in 

ADDRESSES. 

Costs of Compliance 

The FAA estimates that this AD 

affects 7 airplanes of U.S. registry. The 

FAA estimates the following costs to 

comply with this AD: 

ESTIMATED COSTS

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

operators 

Inspect sealant ................................. Up to 12 work-hours × $85 per hour = Up to 

$1,020.

$0 ..................... Up to $1,020 .... Up to $7,140. 

Remove/reinstall drain trough .......... Up to 15 hours × $85 per hour = Up to $1,275 .. Negligible .......... Up to $1,275 ..... Up to $8,925. 

Replace weather seal ....................... Up to 7 work-hours × $85 per hour = Up to 

$595.

$9,680 .............. Up to $10,275 .. Up to $71,925. 

Replace barrier tape ......................... Up to 20 work-hours × $85 per hour = Up to 

$1,700.

Negligible .......... Up to $1,700 ..... Up to $11,900. 

Install seat track filler ........................ Up to 2 work-hours × $85 per hour = Up to 

$170.

Negligible .......... Up to $170 ....... Up to $1,190. 

The FAA estimates the following 

costs to do any necessary replacements 

that would be required based on the 

results of the inspection. The agency has 

no way of determining the number of 

aircraft that might need these 

replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Install or replace sealant ............................................. 26 work-hours × $85 per hour = $2,210 .................... Negligible .......... $2,210 

The FAA has received no definitive 

data on which to base the cost estimates 

for the on-condition actions specified in 

this AD. 

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. 


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24036 Federal Register / Vol. 87, No. 78 / Friday, April 22, 2022 / Rules and Regulations 

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 adding 

the following new airworthiness 

directive: 

2022–08–05 The Boeing Company: 

Amendment 39–22008; Docket No. 

FAA–2021–1169; Project Identifier AD– 

2021–01011–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective May 27, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 737–800 series airplanes, certificated 

in any category, as identified in Boeing Alert 

Requirements Bulletin 737–53A1401 RB, 

dated April 27, 2021. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by the 

determination that insufficient sealing may 

allow water to enter the lower lobe electronic 

equipment (EE) bay through the main deck 

floor structure at the rigid cargo barrier, 

which could cause damage to EE bay line 

replacement units in the E5 rack. The FAA 

is issuing this AD to address water ingress in 

the lower lobe EE bay, which could result in 

water damage to the air data inertial 

reference units and flight management 

computers during flight, leading to a 

complete loss of data to primary flight 

displays and electronic navigation functions, 

which could prevent continued safe flight 

and landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Except as specified by paragraph (h) of this 

AD: At the applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Alert 

Requirements Bulletin 737–53A1401 RB, 

dated April 27, 2021, do all applicable 

actions identified in, and in accordance with, 

the Accomplishment Instructions of Boeing 

Alert Requirements Bulletin 737–53A1401 

RB, dated April 27, 2021. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin 737–53A1401, dated April 27, 2021, 

which is referred to in Boeing Alert 

Requirements Bulletin 737–53A1401 RB, 

dated April 27, 2021. 

(h) Exceptions to Service Information 

Specifications 

(1) Where the Compliance Time column of 

the tables in the ‘‘Compliance’’ paragraph of 

Boeing Alert Requirements Bulletin 737– 

53A1401 RB, dated April 27, 2021, uses the 

phrase ‘‘the original issue date of 

Requirements Bulletin 737–53A1401 RB,’’ 

this AD requires using ‘‘the effective date of 

this AD.’’ 

(2) Where Boeing Alert Requirements 

Bulletin 737–53A1401 RB, dated April 27, 

2021, specifies contacting Boeing for repair 

instructions: This AD requires doing the 

repair using a method approved in 

accordance with the procedures specified in 

paragraph (i) of this AD. 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle ACO 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 manager of the 

certification office, send it to the attention of 

the person identified in paragraph (j) of this 

AD. Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, Seattle ACO Branch, FAA, to make 

those findings. To be approved, the repair 

method, modification deviation, or alteration 

deviation must meet the certification basis of 

the airplane, and the approval must 

specifically refer to this AD. 

(j) Related Information 

For more information about this AD, 

contact Courtney Tuck, Aerospace Engineer, 

Cabin Safety and Environmental Systems 

Section, FAA, Seattle ACO Branch, 2200 

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

phone and fax: 206–231–3986; email: 

courtney.k.tuck@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 the AD specifies otherwise. 

(i) Boeing Alert Requirements Bulletin 

737–53A1401 RB, dated April 27, 2021. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; internet https://

www.myboeingfleet.com. 

(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 service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

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

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

Issued on April 4, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–08543 Filed 4–21–22; 8:45 am] 

BILLING CODE 4910–13–P 


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