Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 16659 

Issued on February 18, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–05691 Filed 3–23–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0292; Project 

Identifier AD–2021–01297–E] 

RIN 2120–AA64 

Airworthiness Directives; International 

Aero Engines, LLC 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 

certain International Aero Engines, LLC 

(IAE LLC) PW1122G–JM, PW1124G1– 

JM, PW1124G–JM, PW1127G1–JM, 

PW1127GA–JM, PW1127G–JM, 

PW1129G–JM, PW1130G–JM, 

PW1133GA–JM, and PW1133G–JM 

model turbofan engines. This proposed 

AD was prompted by an analysis of an 

event involving an International Aero 

Engines AG (IAE AG) V2533–A5 model 

turbofan engine, which experienced an 

uncontained failure of a high-pressure 

turbine (HPT) 1st-stage disk that 

resulted in high-energy debris 

penetrating the engine cowling. This 

proposed AD would require 

performance of an ultrasonic inspection 

(USI) of the HPT 1st-stage disk and HPT 

2nd-stage disk and, depending on the 

results of the inspections, replacement 

of the HPT 1st-stage disk or HPT 2ndstage disk. 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 May 9, 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 International Aero 

Engines, LLC, 400 Main Street, East 

Hartford, CT 06118; phone: (860) 690– 

9667; email: help24@pw.utc.com; 

website: http://fleetcare.prattwhitney.

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–2022–0292; 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: 

Mark Taylor, Aviation Safety Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

(781) 238–7229; email: Mark.Taylor@

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–2022–0292; Project Identifier AD– 

2021–01297–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 Mark Taylor, 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 

On March 18, 2020, an Airbus Model 

A321–231 airplane, powered by IAE AG 

V2533–A5 model turbofan engines, 

experienced an uncontained HPT 1ststage disk failure that resulted in highenergy debris penetrating the engine 

cowling. Based on a preliminary 

analysis of this event, on March 21, 

2020, the FAA issued Emergency AD 

2020–07–51 (followed by publication in 

the Federal Register on April 13, 2020, 

as a Final Rule, Request for Comments 

(85 FR 20402)), which requires the 

removal from service of certain HPT 1ststage disks installed on IAE AG V2522– 

A5, V2524–A5, V2525–D5, V2527–A5, 

V2527E–A5, V2527M–A5, V2528–D5, 

V2530–A5, and V2533–A5 model 

turbofan engines. 

Based on the root cause analysis 

performed since that March 2020 event, 

Pratt & Whitney (PW) identified a 

different population of HPT 1st-stage 

disks and HPT 2nd-stage disks that are 

subject to the same unsafe condition 

identified in AD 2020–07–51. In 

response, the FAA issued AD 2021–19– 

10 on September 10, 2021 (86 FR 

50610), which requires the removal 

from service of certain HPT 1st-stage 

disks and HPT 2nd-stage disks installed 

on IAE LLC PW1122G–JM, PW1124G1– 

JM, PW1124G–JM, PW1127G1–JM, 

PW1127GA–JM, PW1127G–JM, 

PW1129G–JM, PW1130G–JM, 

PW1133GA–JM, and PW1133G–JM 

model turbofan engines. 

Since the FAA issued AD 2021–19– 

10, PW identified another 

subpopulation of HPT 1st-stage disks 

and HPT 2nd-stage disks that require 

inspection and possible removal from 

service. Included in this additional 

subpopulation of HPT 1st-stage disks 


khammond on DSKJM1Z7X2PROD with PROPOSALS
16660 Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 

and HPT 2nd-stage disks are those 

installed on the model turbofan engines 

affected by this proposed AD. This 

proposed AD would require 

performance of a USI on the remaining 

high-risk subpopulation of HPT 1ststage disks and HPT 2nd-stage disks 

and, depending on the results of the 

inspections, replacement of the HPT 1ststage disk or HPT 2nd-stage disk. This 

condition, if not addressed, could result 

in uncontained HPT disk failure, release 

of high-energy debris, damage to the 

engine, damage to the airplane, and loss 

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 PW Service 

Bulletin (SB) PW1000G–C–72–00–0188– 

00A–930A–D, Issue No: 001, dated 

September 13, 2021 (PW SB PW1000G– 

C–72–00–0188–00A–930A–D). This SB 

specifies procedures for performing a 

USI of the HPT 1st-stage disk and the 

HPT 2nd-stage disk, identified by part 

number and serial number, installed on 

IAE LLC PW1124G1–JM, PW1127G–JM, 

PW1127GA–JM, PW1129G–JM, 

PW1130G–JM, PW1133G–JM, and 

PW1133GA–JM model turbofan engines. 

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 PW SB PW1000G– 

C–72–00–0112–00A–930A–D, Issue No: 

005, dated July 22, 2021. This SB 

describes procedures for replacing the 

HPT 1st-stage disk, HPT 2nd-stage disk, 

and rotating hardware. This SB also 

increases the life limit of the HPT 

hardware by introducing a new 

configuration of rotating hardware. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require the 

performance of a USI of the HPT 1ststage disk and HPT 2nd-stage disk and, 

depending on the results of the 

inspections, replacement of the HPT 1ststage disk or HPT 2nd-stage disk. 

Differences Between This Proposed AD 

and the Service Information 

PW SB PW1000G–C–72–00–0188– 

00A–930A–D, Applicability, identifies 

IAE LLC PW1127G–JM, PW1127GA–JM, 

PW1130G–JM, PW1124G1–JM, 

PW1129G–JM, PW1133G–JM, and 

PW1133GA–JM model turbofan engines. 

The FAA determined that IAE LLC 

PW1122G–JM, PW1124G–JM, and 

PW1127G1–JM model turbofan engines 

are of the same type design and are 

subject to the same unsafe condition. 

Therefore, the FAA included IAE LLC 

PW1122G–JM, PW1124G–JM, and 

PW1127G1–JM model turbofan engines 

in the applicability of this proposed AD. 

PW SB PW1000G–C–72–00–0188– 

00A–930A–D uses the term ‘‘hub’’ to 

describe the HPT 1st-stage disk and HPT 

2nd-stage disk, while this proposed AD 

uses the term ‘‘disk.’’ 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 189 

engines installed on 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 

USI the HPT 1st-stage disk and HPT 2nd-stage disk (also includes estimated costs for disassembly of the engine and removal of the HPT 1st-stage disk and HPT 2nd-stage disk).204 work-hours × $85 per hour 

= $17,340.

$0 $17,340 $3,277,260 

The FAA estimates the following 

costs to do any necessary replacement 

that would be required based on the 

results of the proposed inspection. The 

agency has no way of determining the 

number of aircraft that might need this 

replacement: 

ON-CONDITION COSTS

Action Labor cost Parts 

cost 

Cost per 

product 

Replace the HPT 1st-stage disk or HPT 2nd-stage disk ............................... 1 work-hour × $85 per hour = $85 .... $171,430 $171,515 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some of the 

costs of this proposed 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. 

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. 


khammond on DSKJM1Z7X2PROD with PROPOSALS
Federal Register / Vol. 87, No. 57 / Thursday, March 24, 2022 / Proposed Rules 16661 

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: 

International Aero Engines, LLC: Docket No. 

FAA–2022–0292; Project Identifier AD– 

2021–01297–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 9, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to International Aero 

Engines, LLC PW1122G–JM, PW1124G1–JM, 

PW1124G–JM, PW1127G1–JM, PW1127GA– 

JM, PW1127G–JM, PW1129G–JM, PW1130G– 

JM, PW1133GA–JM, and PW1133G–JM 

model turbofan engines with engine serial 

numbers P770101 through P772647. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by an analysis of 

an event involving an International Aero 

Engines AG V2533–A5 model turbofan 

engine, which experienced an uncontained 

failure of a high-pressure turbine (HPT) 1ststage disk that resulted in high-energy debris 

penetrating the engine cowling. The FAA is 

issuing this AD to prevent failure of the HPT 

1st-stage disk and HPT 2nd-stage disk. The 

unsafe condition, if not addressed, could 

result in uncontained HPT disk failure, 

release of high-energy debris, damage to the 

engine, damage to the airplane, and loss of 

the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For affected engines that have not 

incorporated Pratt & Whitney (PW) Service 

Bulletin (SB) PW1000G–C–72–00–0112– 

00A–930A–D, Issue No: 005, dated July 22, 

2021 (PW SB PW1000G–C–72–00–0112– 

00A–930A–D), at the next engine shop visit 

after the effective date of this AD, perform 

the following: 

(i) Ultrasonic inspection (USI) of the HPT 

1st-stage disk using the Accomplishment 

Instructions, paragraph 9.A. or B., as 

applicable, of PW SB PW1000G–C–72–00– 

0188–00A–930A–D, Issue No: 001, dated 

September 13, 2021 (PW SB PW1000G–C– 

72–00–0188–00A–930A–D); and 

(ii) USI of the HPT 2nd-stage disk using the 

Accomplishment Instructions, paragraph 9.C. 

or D., as applicable, of PW SB PW1000G–C– 

72–00–0188–00A–930A–D. 

(2) For affected engines that have 

incorporated PW SB PW1000G–C–72–00– 

0112–00A–930A–D, with an installed HPT 

1st-stage disk having a serial number (S/N) 

identified in the Accomplishment 

Instructions, Table 2., of PW SB PW1000G– 

C–72–00–0188–00A–930A–D, at the next 

engine shop visit after the effective date of 

this AD, perform a USI of the HPT 1st-stage 

disk using the Accomplishment Instructions, 

paragraph 9.A. or B., as applicable, of PW SB 

PW1000G–C–72–00–0188–00A–930A–D. 

(3) For affected engines that have 

incorporated PW SB PW1000G–C–72–00– 

0112–00A–930A–D, with an installed HPT 

2nd-stage disk having an S/N identified in 

the Accomplishment Instructions, Table 3., 

of PW SB PW1000G–C–72–00–0188–00A– 

930A–D, at the next engine shop visit after 

the effective date of this AD, perform a USI 

of the HPT 2nd-stage disk using the 

Accomplishment Instructions, paragraph 9.C. 

or D., of PW SB PW1000G–C–72–00–0188– 

00A–930A–D. 

(4) Based on the results of the USIs 

required by paragraphs (g)(1) through (3) of 

this AD, if any HPT 1st-stage disk or HPT 

2nd-stage disk does not pass the USI, as 

specified in the Accomplishment 

Instructions, paragraphs 9.A. through D., of 

PW SB PW1000G–C–72–00–0188–00A– 

930A–D, as applicable, before further flight, 

remove the HPT 1st-stage disk or HPT 2ndstage disk from service and replace with a 

part eligible for installation. 

Note 1 to paragraph (g): For affected 

engines that have incorporated PW SB 

PW1000G–C–72–00–0112–00A–930A–D and 

do not require an inspection per paragraph 

(g)(2) or (3) of this AD, no further action is 

required. 

(h) Definitions 

(1) For the purpose of this AD, a ‘‘part 

eligible for installation’’ is: 

(i) Any HPT 1st-stage disk that passed the 

USI required by paragraphs (g)(1)(i) and (g)(2) 

of this AD. 

(ii) Any HPT 2nd-stage disk that passed the 

USI required by paragraphs (g)(1)(ii) and 

(g)(3) of this AD. 

(2) For the purpose for this AD, an ‘‘engine 

shop visit’’ is the induction of an engine into 

the shop for maintenance involving the 

separation of the ‘‘M’’ flange. Separation of 

the ‘‘M’’ flange solely for the purposes of 

transportation without subsequent engine 

maintenance does not constitute an engine 

shop visit. 

(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 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. 

(j) Related Information 

(1) For more information about this AD, 

contact Mark Taylor, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

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

238–7229; email: Mark.Taylor@faa.gov. 

(2) For service information identified in 

this AD, contact International Aero Engines, 

LLC, 400 Main Street, East Hartford, CT 

06118; phone: (860) 690–9667; email: 

help24@pw.utc.com; website: http://fleetcare.

prattwhitney.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 March 18, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–06211 Filed 3–23–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0287; Project 

Identifier MCAI–2020–01602–T] 

RIN 2120–AA64 

Airworthiness Directives; De Havilland 

Aircraft of Canada Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 


khammond on DSKJM1Z7X2PROD with PROPOSALS