8436 Federal Register / Vol. 87, No. 31 / Tuesday, February 15, 2022 / Proposed Rules 

disks, low pressure turbine (LPT) stage 2 

disks, and LPT stage 3 disks. The FAA is 

issuing this AD to prevent the failure of the 

high pressure compressor, HPT rotor, and 

LPT rotor. The unsafe condition, if not 

addressed, could result in release of 

uncontained debris, damage to the engine, 

and damage to the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Within 60 days after the effective date of 

this AD, revise the airworthiness limitations 

section of the applicable CFM LEAP–1B 

Engine Shop Manual and the operator’s 

existing approved continuous airworthiness 

maintenance program by incorporating the 

following service information: 

(1) CFM High Pressure Compressor Rotor 

Life Limits LEAP–1B–05–11–02–01A–0B1B– 

C, Issue 009–00, dated July 26, 2021; and 

(2) CFM High Pressure Turbine Rotor Life 

Limits LEAP–1B–05–11–03–01A–0B1B–C, 

Issue 006–00, dated July 26, 2021; and 

(3) CFM Low Pressure Turbine Rotor Life 

Limits LEAP–1B–05–11–04–01A–0B1B–C, 

Issue 006–00, dated June 1, 2021. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, ECO 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 (i)(1) of this AD and 

email to: ANE-AD-AMOC@faa.gov. 

(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. 

(i) Related Information 

(1) For more information about this AD, 

contact Mehdi Lamnyi, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7743; email: Mehdi.Lamnyi@faa.gov. 

(2) For service information identified in 

this AD, contact CFM International, S.A., 

Aviation Operations Center, 1 Neumann 

Way, M/D Room 285, Cincinnati, OH 45125; 

phone: (877) 432–3272; email: fleetsupport@

ge.com. You may view this referenced 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. 

Issued on February 3, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–03041 Filed 2–14–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0010; Project 

Identifier AD–2021–00850–T] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company 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 The Boeing Company Model 

787–8, 787–9, and 787–10 airplanes. 

This proposed AD was prompted by a 

report that during a C-check, corrosion 

was found in the vertical fin tension 

bolt hole located in the aluminum 

crown frames at Section 48. This 

proposed AD would require inspecting 

certain vertical fin tension bolt holes; 

reviewing the bolt sealant application 

installation procedure in the existing 

maintenance or inspection program, as 

applicable; checking maintenance 

records to determine the replacement 

status of vertical fin tension bolts; and 

doing applicable on-condition actions. 

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 April 1, 2022. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

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

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this NPRM, 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 referenced 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–2022– 

0010. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0010; 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, any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: Greg 

Rutar, Aerospace Engineer, Airframe 

Section, FAA, Seattle ACO Branch, 2200 

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

phone and fax: 206–231–3529; email: 

greg.rutar@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 ADDRESSES. Include ‘‘Docket No. 

FAA–2022–0010; Project Identifier AD– 

2021–00850–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 this 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 https://

www.regulations.gov, including any 

personal information you provide. The 

agency will also post a report 

summarizing each substantive verbal 

contact received about this 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 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 87, No. 31 / Tuesday, February 15, 2022 / Proposed Rules 8437 

comments as CBI. Please mark each 

page of your submission containing CBI 

as ‘‘PROPIN.’’ The FAA will treat such 

marked submissions as confidential 

under the FOIA, and they will not be 

placed in the public docket of this 

NPRM. Submissions containing CBI 

should be sent to Greg Rutar, Aerospace 

Engineer, Airframe Section, FAA, 

Seattle ACO Branch, 2200 South 216th 

St., Des Moines, WA 98198; phone and 

fax: 206–231–3529; email: greg.rutar@

faa.gov. Any commentary that the FAA 

receives which is not specifically 

designated as CBI will be placed in the 

public docket for this rulemaking. 

Background 

The FAA has received a report 

indicating that during a C-check, 

corrosion was found in the vertical fin 

tension bolt hole located in the 

aluminum crown frames at Section 48. 

Upon further investigation, it was found 

that the corrosion was caused by 

insufficient sealant application during 

the vertical fin tension bolt installation. 

This condition, if not addressed, could 

result in undetected corrosion. 

Undetected corrosion in this location 

could lead to the structure falling below 

residual strength requirements and the 

loss of the vertical fin, which could 

result in loss of control of the airplane. 

FAA’s Determination 

The FAA is issuing this NPRM after 

determining that the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Boeing Alert 

Requirements Bulletin B787–81205– 

SB550010–00 RB, Issue 001, dated May 

24, 2021. This service information 

specifies, depending on airplane 

configuration, procedures for a detailed 

inspection of the vertical fin tension 

bolt holes (16 locations) in the 

aluminum crown frames, composite 

deck, and root fittings for corrosion and 

finish degradation; a review of the 

existing maintenance or inspection 

program, as applicable, related to the 

vertical fin tension bolt installation 

procedure to determine if the sealant 

application is correct; a review of the 

maintenance records to determine if a 

vertical fin tension bolt has been 

replaced and to determine the sealant 

application procedure that was used; 

and applicable on-condition actions. 

On-condition actions include applying 

sealant and installing new vertical fin 

tension bolts and barrel nuts; revising 

the existing maintenance or inspection 

program, as applicable, to include the 

minimum requirement for the correct 

vertical fin tension bolt sealant 

application procedure; a detailed 

inspection for corrosion and finish 

degradation of only the affected vertical 

fin tension bolt holes in the aluminum 

crown frame, composite deck, and root 

fittings; and repair. 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. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

accomplishing the actions specified in 

the service information already 

described. For information on the 

procedures and compliance times, see 

this service information at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2022– 

0010. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 116 

airplanes of U.S. registry. The FAA 

estimates the following costs to comply 

with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspection (16 locations), sealant application, 

and bolt/nut installation.

5.2 work-hours × $85 per hour = $442 .......... $20,580 $21,022 $2,438,552 

Review the existing maintenance or inspection program, as applicable.1 work-hour × $85 per hour = $85 ................. 0 85 9,860 

Records review ............................................... 1 work-hour × $85 per hour = $85 ................. 0 85 9,860 

The FAA estimates the following 

costs to do any necessary detailed 

inspection of the affected holes that 

would be required based on the results 

of the proposed actions. The agency has 

no way of determining the number of 

aircraft that might need these oncondition actions: 

ON-CONDITION COSTS * 

Action Labor cost Parts cost Cost per 

product 

Inspection ..................................................................... 5 work-hours × $85 per hour = $425 ........................... $0 $425 

* Does not include cost of revising the maintenance program. 

The FAA has determined that revising 

the existing maintenance or inspection 

program, if required, takes an average of 

90 work-hours per operator, although 

the agency recognizes that this number 

may vary from operator to operator. 

Since operators incorporate 

maintenance or inspection program 

changes for their affected fleet(s), the 

FAA has determined that a per-operator 

estimate is more accurate than a perairplane estimate. Therefore, the FAA 

estimates the average total cost per 

operator to be $7,650 (90 work-hours × 

$85 per work-hour). 

The FAA has received no definitive 

data on which to base the cost estimates 

for the repair specified in this proposed 

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 proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

operators. 


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8438 Federal Register / Vol. 87, No. 31 / Tuesday, February 15, 2022 / Proposed Rules 

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 

The FAA determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would 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 this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Would not affect intrastate 

aviation in Alaska, and 

(3) Would 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 Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 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: 

The Boeing Company: Docket No. FAA– 

2022–0010; Project Identifier AD–2021– 

00850–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by April 1, 

2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 787–8, 787–9, and 787–10 airplanes, 

certificated in any category, as identified in 

Boeing Alert Requirements Bulletin B787– 

81205–SB550010–00 RB, Issue 001, dated 

May 24, 2021. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 55, Stabilizers. 

(e) Unsafe Condition 

This AD was prompted by a report that 

during a C-check, corrosion was found in the 

vertical fin tension bolt hole located in the 

aluminum crown frames at Section 48. The 

FAA is issuing this AD to address undetected 

corrosion, which could lead to the structure 

falling below residual strength requirements 

and the loss of the vertical fin, and result in 

loss of control of the airplane. 

(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 B787–81205– 

SB550010–00 RB, Issue 001, dated May 24, 

2021, do all applicable actions identified in, 

and in accordance with, the Accomplishment 

Instructions of Boeing Alert Requirements 

Bulletin B787–81205–SB550010–00 RB, Issue 

001, dated May 24, 2021. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin B787–81205–SB550010–00, Issue 

001, dated May 24, 2021, which is referred 

to in Boeing Alert Requirements Bulletin 

B787–81205–SB550010–00 RB, Issue 001, 

dated May 24, 2021. 

(h) Exceptions to Service Information 

Specifications 

(1) Where the Compliance Time columns 

of the tables in the ‘‘Compliance’’ paragraph 

of Boeing Alert Requirements Bulletin B787– 

81205–SB550010–00 RB, Issue 001, dated 

May 24, 2021, uses the phrase ‘‘the Issue 1 

date of Requirements Bulletin B787–81205– 

SB550010–00 RB,’’ this AD requires using 

‘‘the effective date of this AD.’’ 

(2) Where Boeing Alert Requirements 

Bulletin B787–81205–SB550010–00 RB, Issue 

001, dated May 24, 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 

(1) For more information about this AD, 

contact Greg Rutar, Aerospace Engineer, 

Airframe Section, FAA, Seattle ACO Branch, 

2200 South 216th St., Des Moines, WA 

98198; phone and fax: 206–231–3529; email: 

greg.rutar@faa.gov. 

(2) 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. You may view this 

referenced 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. 

Issued on January 14, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–03133 Filed 2–14–22; 8:45 am] 

BILLING CODE 4910–13–P 


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