Federal Register / Vol. 87, No. 11 / Tuesday, January 18, 2022 / Proposed Rules 2563 

related to the laser’s classification. Like 

the warning information to be provided 

at the location of the laser system’s 

installation, the purpose of this 

condition is to ensure any person 

maintaining the system is aware of the 

hazards, including those related to the 

use of magnifying glasses or binoculars. 

Condition 5 requires the applicant to 

update the airplane operating 

limitations and information required 

under 14 CFR 25.1581. The airplane 

flight-manual supplement insert must 

describe the intended function of the 

missile-defense system, its intended 

operation, and the phases of flight in 

which it may be used. The insert also 

must add a caution that describes the 

significant risk of injury the missiledefense system poses to others while in 

proximity to other aircraft, airports, and 

populated areas. 

These proposed special conditions 

contain the additional safety standards 

that the Administrator considers 

necessary to establish a level of safety 

equivalent to that established by the 

existing airworthiness standards. 

After considering public comment, 

should the FAA impose these special 

conditions on the applicant, and issue a 

supplemental type certificate for the 

installation of this system, such 

approvals would not constitute approval 

to operate the system. FAA Advisory 

Circular 70–1, ‘‘Outdoor Laser 

Operations,’’ provides guidance on 

obtaining operational approval. 

Applicability 

As discussed above, these proposed 

special conditions are applicable to the 

Airbus Model A321–200 airplane, as 

modified by FedEx, with the laser-based 

missile-defense system installed. 

Should FedEx apply at a later date for 

a supplemental type certificate to 

modify any other model included on 

Type Certificate No. A28NM to 

incorporate the same novel or unusual 

design feature, these special conditions 

would apply to that model as well. 

Conclusion 

This action affects only a certain 

novel or unusual design feature on one 

model of airplane. It is not a rule of 

general applicability and affects only 

the applicant. 

List of Subjects in 14 CFR Part 25 

Aircraft, Aviation safety, Reporting 

and recordkeeping requirements. 

Authority Citation 

The authority citation for these 

special conditions is as follows: 

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

44701, 44702, 44704. 

The Proposed Special Conditions 

Accordingly, the Federal Aviation 

Administration (FAA) proposes the 

following special conditions as part of 

the type certification basis for the 

Airbus Model A321–200 airplane with a 

laser-based missile-defense system, as 

modified by FedEx. 

1. The system must have means that 

prevent the inadvertent activation of the 

system on the ground, including during 

airplane maintenance and ground 

handling. Such means must address all 

foreseeable failure modes and operating 

and maintenance errors. 

2. The system must be designed so 

that its operation in-flight does not 

result in damage to the airplane or other 

aircraft, or injury to any person. 

Operation of the system must not be 

capable of compromising continued safe 

flight and landing of other aircraft and 

the airplane on which it is installed, 

either by direct damage, laser-reflective 

damage, or through distraction or 

incapacitation of crew. 

3. Laser-safety information for 

maintaining or servicing the airplane 

must be prominently placarded on the 

airplane or laser-based missile-defense 

system at the location of the laser 

installation. 

4. Instructions for continued 

airworthiness for installation, removal, 

and maintenance of the laser-based 

missile-defense system must contain 

warnings appropriate to the laser 

classification concerning the hazards 

associated with exposure to laser 

radiation. This includes instructions 

regarding potential hazards to personnel 

who are using optical magnification 

devices such as magnifying glasses or 

binoculars. 

5. The airplane flight manual 

supplement (AFMS) must describe the 

intended functions of the installed laser 

systems, to include identifying the 

intended operations and phases of 

flight. The AFMS must state: Caution: 

The operation of the installed laser 

system could pose significant risk of 

injury to others while in proximity to 

other aircraft, airports, and populated 

areas. 

Issued in Kansas City, Missouri, on January 

7, 2022. 

Patrick R. Mullen, 

Manager, Technical Innovation Policy 

Branch, Policy and Innovation Division, 

Aircraft Certification Service. 

[FR Doc. 2022–00505 Filed 1–14–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–1183; Project 

Identifier AD–2021–01193–E] 

RIN 2120–AA64 

Airworthiness Directives; CFM 

International, S.A. Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for all 

CFM International, S.A. (CFM) LEAP– 

1A23, LEAP–1A24, LEAP–1A24E1, 

LEAP–1A26, LEAP–1A26CJ, LEAP– 

1A26E1, LEAP–1A29, LEAP–1A29CJ, 

LEAP–1A30, LEAP–1A32, LEAP–1A33, 

LEAP–1A33B2, and LEAP–1A35A 

model turbofan engines. This proposed 

AD was prompted by the detection of 

melt-related freckles in the billet, which 

may reduce the life of certain 

compressor rotor stages 6–10 spools, 

high pressure turbine (HPT) rotor 

interstage seals, HPT rotor stage 2 disks, 

low pressure turbine (LPT) stage 1 disks, 

LPT stage 2 disks, LPT stage 3 disks, 

and LPT stage 4 disks. This proposed 

AD would require revising the 

airworthiness limitations section (ALS) 

of the applicable CFM LEAP–1A Engine 

Shop Manual (ESM) and the operator’s 

existing approved continuous 

airworthiness maintenance program 

(CAMP) to incorporate reduced life 

limits for these parts. This proposed AD 

would also require the removal of 

certain LPT stage 4 disks identified by 

serial number (S/N) prior to their new 

life limits. 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 4, 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. 


khammond on DSKJM1Z7X2PROD with PROPOSALS
2564 Federal Register / Vol. 87, No. 11 / Tuesday, January 18, 2022 / Proposed Rules 

For service information identified in 

this NPRM, 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 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. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–1183; 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: 

Mehdi Lamnyi, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7743; fax: (781) 238– 

7199; email: Mehdi.Lamnyi@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–2021–1183; Project Identifier AD– 

2021–01193–E’’ 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 

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 Mehdi Lamnyi, 

Aviation Safety Engineer, ECO Branch, 

FAA, 1200 District Avenue, Burlington, 

MA 01803. 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 was notified by the 

manufacturer of the detection of meltrelated freckles in the billet, which may 

reduce the life of certain compressor 

rotor stages 6–10 spools, HPT rotor 

interstage seals, HPT rotor stage 2 disks, 

LPT stage 1 disks, LPT stage 2 disks, 

LPT stage 3 disks, and LPT stage 4 disks 

(life-limited parts (LLPs)). Through the 

manufacturer’s investigation, it was 

determined that these LLPs may have 

subsurface anomalies that developed 

during the manufacturing process, 

resulting in a lower life capability. As a 

result of its investigation, the 

manufacturer determined the need to 

reduce the life limits of these LLPs. To 

reflect these reduced life limits, the 

manufacturer revised the CFM ALS, 

Chapter 05 of CFM LEAP 1A ESM. 

Additionally, the manufacturer 

published service information that 

specifies procedures for the removal and 

replacement of these LLPs before 

reaching their new life limits. 

The FAA is proposing to require 

operators to update the ALS of the 

applicable CFM LEAP–1A ESM, with 

the reduced life limits for these LLPs. 

The FAA is also proposing to require 

operators to remove certain LPT stage 4 

disks identified by S/N before reaching 

their new life limits. The LPT stage 4 

disks, identified by S/N in Figure 1 to 

paragraph (g)(2) of this proposed AD, 

were discovered by the manufacturer 

after publication of the ALS updates. 

This condition, if not addressed, could 

result in uncontained debris release, 

damage to the engine, and damage to 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 CFM High 

Pressure Compressor Rotor Life Limits 

LEAP 1A–05–11–02–01A–0B1B–C, 

Issue 010–00, dated September 15, 2021 

(CFM LEAP 1A–05–11–02–01A–0B1B– 

C); CFM High Pressure Turbine Rotor 

Life Limits LEAP 1A–05–11–03–01A– 

0B1B–C, Issue 007–00, dated September 

15, 2021 (CFM LEAP 1A–05–11–03– 

01A–0B1B–C); and CFM Low Pressure 

Turbine Rotor Life Limits LEAP 1A–05– 

11–04–01A–0B1B–C, Issue 009–00, 

dated June 1, 2021 (LEAP 1A–05–11– 

04–01A–0B1B–C). CFM LEAP 1A–05– 

11–02–01A–0B1B–C, CFM LEAP 1A– 

05–11–03–01A–0B1B–C, and CFM 

LEAP 1A–05–11–04–01A–0B1B–C 

provide the new life limits for the LLPs. 

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. 

Other Related Service Information 

The FAA reviewed CFM LEAP 1A– 

05–11–02–01A–0B1B–C, Issue 009–00, 

dated July 26, 2021; and CFM LEAP 1A– 

05–11–03–01A–0B1B–C, Issue 006–00, 

dated July 26, 2021. This service 

information provides the new life limits 

for the LLPs. 

The FAA also reviewed CFM Service 

Bulletin (SB) LEAP–1A–72–00–0413– 

01A–930A–D, Issue 004–00, dated 

December 11, 2021 (CFM SB LEAP–1A– 

72–00–0413–01A–930A–D). CFM SB 

LEAP–1A–72–00–0413–01A–930A–D 

specifies procedures for removing and 

replacing the LLPs, and provides new 

life limits for certain S/Ns of the LLPs. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

revising the ALS of the CFM LEAP–1A 

ESM, as applicable to each affected 

engine model, and the operator’s 

existing approved CAMP to incorporate 

reduced life limits for certain LLPs. This 

proposed AD also requires replacement 

of two LPT stage 4 disks. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 256 

engines installed on airplanes of U.S. 

registry. The FAA estimates that 256 

engines installed on airplanes of U.S. 

registry would require revising the ALS 

of the CFM LEAP–1A ESM and the 

operator’s existing approved CAMP. The 

FAA estimates that zero airplanes of 


khammond on DSKJM1Z7X2PROD with PROPOSALS
Federal Register / Vol. 87, No. 11 / Tuesday, January 18, 2022 / Proposed Rules 2565 

U.S. registry would require replacement 

of the LPT stage 4 disk. 

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 

Revise ALS of Engine Manual and the operator’s existing approved CAMP.1 work-hour × $85 per hour = $85 ................. $0 $85 $21,760 

The FAA estimates the following 

costs to replace the LPT stage 4 disk: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Replace LPT Stage 4 disk .............................. 225 work-hours × $85 per hour = $19,125 .... $129,000 $148,125 $0 

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: 

CFM International, S.A.: Docket No. FAA– 

2021–1183; Project Identifier AD–2021– 

01193–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by March 4, 

2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to CFM International, S.A. 

(CFM) LEAP–1A23, LEAP–1A24, LEAP– 

1A24E1, LEAP–1A26, LEAP–1A26CJ, LEAP– 

1A26E1, LEAP–1A29, LEAP–1A29CJ, LEAP– 

1A30, LEAP–1A32, LEAP–1A33, LEAP– 

1A33B2, and LEAP–1A35A model turbofan 

engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7230, Turbine Engine Compressor 

Section, and JASC Code 7250, Turbine 

Section. 

(e) Unsafe Condition 

This AD was prompted by the detection of 

melt-related freckles in the billet, which may 

reduce the life of certain compressor rotor 

stages 6–10 spools, high pressure turbine 

(HPT) rotor interstage seals, HPT rotor stage 

2 disks, low pressure turbine (LPT) stage 1 

disks, LPT stage 2 disks, LPT stage 3 disks, 

and LPT stage 4 disks. The FAA is issuing 

this AD to prevent the failure of the highpressure 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 

(1) Within 60 days after the effective date 

of this AD, revise the airworthiness 

limitations section (ALS) of the applicable 

CFM LEAP–1A Engine Shop Manual (the 

ESM) and the operator’s existing approved 

continuous airworthiness maintenance 

program (CAMP) by incorporating the 

following service information: 

(i) CFM High Pressure Compressor Rotor 

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

C, Issue 010–00, dated September 15, 2021; 

and 

(ii) CFM High Pressure Turbine Rotor Life 

Limits LEAP 1A–05–11–03–01A–0B1B–C, 

Issue 007–00, dated September 15, 2021; and 

(iii) CFM Low Pressure Turbine Rotor Life 

Limits LEAP 1A–05–11–04–01A–0B1B–C, 

Issue 009–00, dated June 1, 2021. 

(2) Before the LPT stage 4 disk, P/N 362– 

039–520–0, with serial numbers identified in 

Figure 1 to paragraph (g)(2) of this AD (Figure 

1) accumulates the cycles in Figure 1, or 

within 100 cycles after the effective date of 

this AD, whichever occurs later, remove the 

affected LPT stage 4 disk from service and 

replace with a part eligible for installation. 


khammond on DSKJM1Z7X2PROD with PROPOSALS
2566 Federal Register / Vol. 87, No. 11 / Tuesday, January 18, 2022 / Proposed Rules 

(h) Credit for Previous Actions 

(1) You may take credit for the action 

required by paragraph (g)(1)(i) of this AD if 

the following service information was 

incorporated into the ALS of the applicable 

ESM and the operator’s existing approved 

CAMP prior to the effective date of this AD: 

CFM High Pressure Compressor Rotor Life 

Limits LEAP 1A–05–11–02–01A–0B1B–C, 

Issue 009–00, dated July 26, 2021. 

(2) You may take credit for the action 

required by paragraph (g)(1)(ii) of this AD if 

the following service information was 

incorporated into the ALS of the applicable 

ESM and the operator’s existing approved 

CAMP prior to the effective date of this AD: 

CFM High Pressure Turbine Rotor Life Limits 

LEAP 1A–05–11–03–01A–0B1B–C, Issue 

006–00, dated July 26, 2021. 

(i) 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 (j)(1) of this AD. You 

may email your request 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. 

(j) 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; fax: (781) 238–7199; 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 January 7, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–00509 Filed 1–14–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 71 

[Docket No. FAA–2021–1150; Airspace 

Docket No. 21–ASW–28] 

RIN 2120–AA66 

Proposed Amendment of the Class E 

Airspace; Watonga, OK 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: This action proposes to 

amend the Class E airspace at Watonga, 

OK. The FAA is proposing this action 

due to an airspace review conducted as 

part of the decommissioning of the 

Kingfisher very high frequency (VHF) 

omnidirectional range (VOR) as part of 

the VOR Minimal Operational Network 

(MON) Program. The name and 

geographic coordinates of the airport 

would also be updated to coincide with 

the FAA’s aeronautical database. 

DATES: Comments must be received on 

or before March 4, 2022. 

ADDRESSES: Send comments on this 

proposal to the U.S. Department of 

Transportation, Docket Operations, 

West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590; telephone (202) 

366–9826, or (800) 647–5527. You must 

identify FAA Docket No. FAA–2021– 

1150/Airspace Docket No. 21–ASW–28, 

at the beginning of your comments. You 

may also submit comments through the 

internet at https://www.regulations.gov. 

You may review the public docket 

containing the proposal, any comments 

received, and any final disposition in 

person in the Dockets Office between 

9:00 a.m. and 5:00 p.m., Monday 

through Friday, except federal holidays. 

FAA Order JO 7400.11F, Airspace 

Designations and Reporting Points, and 

subsequent amendments can be viewed 

online at https://www.faa.gov/air_

traffic/publications/. For further 

information, you can contact the 

Airspace Policy Group, Federal Aviation 

Administration, 800 Independence 

Avenue SW, Washington, DC 20591; 

telephone: (202) 267–8783. FAA Order 

JO 7400.11F is also available for 

inspection at the National Archives and 

Records Administration (NARA). For 

information on the availability of FAA 

Order JO 7400.11F at NARA, email: 

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

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

ibr-locations.html. 

FOR FURTHER INFORMATION CONTACT: 

Jeffrey Claypool, Federal Aviation 

Administration, Operations Support 

Group, Central Service Center, 10101 

Hillwood Parkway, Fort Worth, TX 

76177; telephone (817) 222–5711. 

SUPPLEMENTARY INFORMATION: 

Authority for This Rulemaking 

The FAA’s authority to issue rules 

regarding aviation safety is found in 

Title 49 of the United States Code. 

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. This rulemaking is 

promulgated under the authority 

described in Subtitle VII, Part A, 

Subpart I, Section 40103. Under that 

section, the FAA is charged with 

prescribing regulations to assign the use 

of airspace necessary to ensure the 

safety of aircraft and the efficient use of 

airspace. This regulation is within the 

scope of that authority as it would 

amend the Class E airspace extending 

upward from 700 feet above the surface 

at Watonga Regional Airport, Watonga, 

OK, to support instrument flight rule 

operations at this airport. 


khammond on DSKJM1Z7X2PROD with PROPOSALSEP18JA22.000</GPH>

Figure 1 to Paragraph (g)(2)-Life Limits for LPT Stage 4 Disks, PIN 362-039-520-0 

LPT Stage 4 Disk Life Limit for LEAP-1A23, - Life Limit for 

Serial Number 1A24, -1A24El, -1A26, - LEAP-1A26CJ 

1A26El, -1A29, -1A30, -1A32, - and-1A29CJ 

1A33, -1A33B2, and -1A35A 

PC975638 2,500 cycles 1,400 cycles 

PC975635