Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 22153 

Issued on April 8, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–08005 Filed 4–13–22; 8:45 am] 

BILLING CODE 4910–13–C 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0511; Project 

Identifier AD–2020–01229–E] 

RIN 2120–AA64 

Airworthiness Directives; Williams 

International Co., L.L.C. Turbofan 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Supplemental notice of 

proposed rulemaking (SNPRM). 

SUMMARY: The FAA is revising a notice 

of proposed rulemaking (NPRM) that 

applied to certain Williams 

International Co., L.L.C. (Williams) 

FJ44–2A, FJ44–2C, FJ44–3A, and FJ44– 

3A–24 model turbofan engines. This 

action revises the NPRM by expanding 

the applicability, updating the estimated 

costs information, updating the 

compliance time, and adding an 

installation prohibition. This action also 

revises the NPRM by updating the 

service information references. The FAA 

is proposing this airworthiness directive 

(AD) to address the unsafe condition on 

these products. Since these actions 

would impose an additional burden 

over those in the NPRM, the agency is 

requesting comments on this SNPRM. 

DATES: The FAA must receive comments 

on this SNPRM by May 31, 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 SNPRM, contact Williams 

International, Product Support, 2000 

Centerpoint Parkway, Pontiac, MI 

48341; phone: (800) 859–3544; website: 

http://www.williams-int.com/productsupport. You may view this service 

information at the FAA, Chicago ACO, 

2300 East Devon Avenue, Des Plaines, 

IL 60018. 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–2021–0511; 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 

SNPRM, any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: Kyle 

Bush, Aviation Safety Engineer, Chicago 

ACO, FAA, 2300 East Devon Avenue, 

Des Plaines, IL 60018; phone: (847) 294– 

7870; email: kyle.bush@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–2021–0511; Project Identifier AD– 

2020–01229–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 again revise 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 proposed 

AD. 

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 SNPRM 

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 SNPRM, 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 SNPRM. Submissions containing 

CBI should be sent to Kyle Bush, 

Aviation Safety Engineer, Chicago ACO, 

FAA, 2300 East Devon Avenue, Des 

Plaines, IL 60018. 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 issued an NPRM to amend 

14 CFR part 39 by adding an AD that 

would apply to Williams FJ44–2A, 

FJ44–2C, FJ44–3A, and FJ44–3A–24 

model turbofan engines. The NPRM 

published in the Federal Register on 

June 25, 2021 (86 FR 33579). The NPRM 

was prompted by a report of cracks in 

the high-pressure turbine (HPT) disk 

posts and failure of an HPT disk post, 

resulting in the contained fracture of an 

HPT disk post and blade. Williams 

initiated an investigation to understand 

the root cause of the cracks and to 

determine the necessary corrective 

action. Metallurgical evaluation showed 

cracking related to intergranular 

oxidation related to HPT disk post metal 

temperatures. 

As a result of this investigation, 

Williams determined the root cause of 

this cracking was due to higher HPT 

disk post temperatures and a difference 

in manufacturing processes. Williams 

determined that these cracks have only 

occurred on HPT disks with part 

number (P/N) 67093 installed on FJ44– 

2A or FJ44–2C model turbofan engines. 

Williams subsequently published 

service information specifying 

procedures to remove the HPT disk, P/ 

N 67093. In the NPRM, the FAA 

proposed to require removing the HPT 

disk, P/N 67093, from service before 

reaching its new life limit and replacing 

it with a part eligible for installation. 

Actions Since the NPRM Was Issued 

Since the FAA issued the NPRM, 

Williams notified the FAA that revised 

service information was available. The 

revised service information, Williams 

International Service Bulletin (SB) 

WISB–72–1032, Revision 2, dated June 

4, 2020, adds additional serialnumbered FJ44–2A, FJ44–2C, and FJ44– 

3A model turbofan engines to the 

effectivity and updates the compliance 

time for replacing the HPT disk. The 

FAA determined that the additional 


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22154 Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 

serial-numbered FJ44–2A, FJ44–2C, and 

FJ44–3A model turbofan engines are 

susceptible to the same unsafe 

condition. Therefore, the FAA revised 

the applicability of this proposed AD to 

include FJ44–2A, FJ44–2C, FJ44–3A, 

and FJ44–3A–24 model turbofan 

engines with an engine serial number 

identified in paragraph 1.A., Effectivity, 

of Williams International SB WISB–72– 

1032, Revision 2, dated June 4, 2020, 

with an installed HPT disk, P/N 67093. 

In addition, the FAA revised the 

estimated number of affected engines 

installed on airplanes of U.S. registry 

from 213 engines to 242 engines, 

updated the compliance time specified 

in Table 1 to Paragraph (g), and added 

an installation prohibition paragraph to 

this proposed AD. Finally, the FAA 

revised all references to the service 

information in this AD. 

Comments 

The FAA received a comment from 

one commenter on the NPRM, Williams. 

The following presents the comment 

received on the NPRM and the FAA’s 

response to the comment. 

Request That the NPRM Reflect Current 

Service Document Revisions 

Williams requested that the NPRM be 

revised to reflect the specified 

procedures of the current service 

document revisions, Williams 

International SB WISB–72–1032, 

Revision 2, dated June 4, 2020, and 

Williams International SB WISB–72– 

1034, Revision 3, dated July 2, 2021. 

The FAA agrees. The FAA has revised 

this proposed AD to include Williams 

International SB WISB–72–1032, 

Revision 2, dated June 4, 2020, and 

Williams International SB WISB–72– 

1034, Revision 3, dated July 2, 2021. 

Other Differences Between This SNPRM 

and the NPRM 

In this SNPRM, the FAA has replaced 

the term ‘‘life limit’’ with ‘‘defined life 

cycles,’’ where appropriate. In this 

SNPRM, the FAA has replaced all 

instances of ‘‘resulting in the release of 

an HPT blade’’ to ‘‘resulting in the 

contained fracture of an HPT disk post 

and blade.’’ 

FAA’s Determination 

The FAA is proposing this AD after 

determining the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. Certain changes described 

above expand the scope of the NPRM. 

As a result, it is necessary to reopen the 

comment period to provide additional 

opportunity for the public to comment 

on this SNPRM. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Williams 

International SB WISB–72–1032, 

Revision 2, dated June 4, 2020. This 

service information specifies procedures 

for removing and replacing the HPT 

rotor assemblies that include HPT disk, 

P/N 67093. The service information also 

provides instructions for incorporating 

the latest HPT combustor/fuel slinger 

module on FJ44–2A and FJ44–2C 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 Williams 

International SB WISB–72–1034, 

Revision 3, dated July 2, 2021. This 

service information describes 

procedures for re-identifying the HPT 

rotor assembly and HPT disk. 

Proposed AD Requirements in This 

SNPRM 

This proposed AD would require 

removing the HPT disk, P/N 67093, 

from service before reaching defined 

cycle limits and replacing it with a part 

eligible for installation. 

Differences Between This SNPRM and 

the Service Information 

The Accomplishment Instructions, 

paragraph 2.D., of Williams 

International SB WISB–72–1032, 

Revision 2, dated June 4, 2020, specifies 

procedures for replacing or reworking 

the HPT combustor/fuel slinger module 

on FJ44–2A and FJ44–2C model 

turbofan engines, while this proposed 

AD would not mandate that action. The 

FAA has determined that replacement 

or rework of the HPT combustor/fuel 

slinger module is not necessary to 

resolve the unsafe condition in this 

proposed AD. 

The Accomplishment Instructions, 

paragraphs 2.C. and E. and 3.C. and D., 

of Williams International SB WISB–72– 

1032, Revision 2, dated June 4, 2020, 

specify procedures for removing and 

replacing the HP turbine rotor assembly 

containing HPT disk, P/N 67093, 

whereas this proposed AD would 

mandate removing and replacing the 

HPT disk, P/N 67093. Although 

removing the HPT rotor assembly is a 

necessary step in the replacement of the 

HPT disk, this proposed AD only 

requires replacement of the HPT disk to 

resolve the unsafe condition addressed 

by this proposed AD. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 242 

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 

Remove and replace the HPT 

disk.

33 work-hours × $85 per hour = $2,805 ................................ $16,694 $19,499 $4,718,758 

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. 


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Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 22155 

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: 

Williams International Co., L.L.C.: Docket 

No. FAA–2021–0511; Project Identifier 

AD–2020–01229–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 31, 

2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Williams International 

Co., L.L.C. (Williams) FJ44–2A, FJ44–2C, 

FJ44–3A, and FJ44–3A–24 model turbofan 

engines with an engine serial number 

identified in paragraph 1.A., Effectivity, of 

Williams International Service Bulletin 

WISB–72–1032, Revision 2, dated June 4, 

2020 (the SB), with an installed highpressure turbine (HPT) disk, part number (P/ 

N) 67093. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by a report of 

cracks in the HPT disk posts and failure of 

an HPT disk post, resulting in the contained 

fracture of an HPT disk post and blade. The 

FAA is issuing this AD to prevent cracking 

and failure of the HPT disk posts. The unsafe 

condition, if not addressed, could result in 

release of the HPT blade, 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) For FJ44–2A and FJ44–2C model 

turbofan engines, within the compliance 

times specified in Table 1 to Paragraph (g) of 

this AD, remove the affected HPT disk from 

service and replace it with a part eligible for 

installation using paragraphs 2.C. and E., 

Accomplishment Instructions—FJ44–2A & 

FJ44–2C, of the SB. 

(2) For FJ44–3A and FJ44–3A–24 model 

turbofan engines, within the compliance 

times specified in Table 1 to Paragraph (g) of 

this AD, remove the affected HPT disk from 

service and replace it with a part eligible for 

installation using paragraphs 3.C. and D., of 

the SB. 

(h) Installation Prohibition 

After the effective date of this AD, do not 

install onto any engine an HPT disk with P/ 

N 67093. 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Chicago ACO, 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. 

(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 Kyle Bush, Aviation Safety Engineer, 

Chicago ACO, FAA, 2300 East Devon 

Avenue, Des Plaines, IL 60018; phone: (847) 

294–7870; email: kyle.bush@faa.gov. 

(2) For service information identified in 

this AD, contact Williams International, 

Product Support, 2000 Centerpoint Parkway, 

Pontiac, MI 48341; phone: (800) 859–3544; 

website: http://www.williams-int.com/ 

product-support. 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. 


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Table 1 to Paragraph (g) - Compliance Time 

HPT disk, PIN 67093, cycles 

since new (CSN) as of the 

effective date of this AD 

0 to 999 CSN 

1,000 to 1,999 CSN 

2,000 to 2,999 CSN 

3,000 or higher CSN 

Replace within HPT disk 

cycles after the effective date 

of this AD 

620 

530 

245 

130 
22156 Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 

Issued on April 7, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–07822 Filed 4–13–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0457; Project 

Identifier MCAI–2022–00263–T] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

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 Airbus SAS Model A318 series 

airplanes, Model A319–111, –112, –113, 

–114, –115, –131, –132, and –133 

airplanes; Model A320–211, –212, –214, 

–216, –231, –232, and –233 airplanes; 

and Model A321–111, –112, –131, –211, 

–212, –213, –231, and –232 airplanes. 

This proposed AD was prompted by a 

report that cracks were found on the 

web horizontal flange and inner cap on 

frame (FR) 68, left-hand (LH) and righthand (RH) side, at stringer (STGR) 22. 

This proposed AD would require 

repetitive high frequency eddy current 

(HFEC) inspections for cracks on the 

web horizontal flange and inner cap on 

FR 68, LH and RH side at STGR 22, and 

applicable corrective actions, as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

proposed for incorporation by reference. 

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 31, 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 material that will be incorporated 

by reference (IBR) in this AD, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 

8999 000; email ADs@easa.europa.eu; 

internet www.easa.europa.eu. You may 

find this material on the EASA website 

at https://ad.easa.europa.eu. 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. 

It is also available in the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0457. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0457; 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. 

FOR FURTHER INFORMATION CONTACT: Dan 

Rodina, Aerospace Engineer, Large 

Aircraft Section, International 

Validation Branch, FAA, 2200 South 

216th Street, Des Moines, WA 98198; 

telephone and fax 206–231–3225; email 

dan.rodina@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–2022–0457; Project Identifier 

MCAI–2022–00263–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 

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 should be sent to Dan 

Rodina, Aerospace Engineer, Large 

Aircraft Section, International 

Validation Branch, FAA, 2200 South 

216th Street, Des Moines, WA 98198; 

telephone and fax 206–231–3225; email 

dan.rodina@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 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2022–0030, 

dated February 25, 2022 (EASA AD 

2022–0030) (also referred to as the 

MCAI), to correct an unsafe condition 

for certain Airbus SAS Model A318– 

111, A318–112, A318–121, A318–122, 

A319–111, A319–112, A319–113, A319– 

114, A319–115, A319–131, A319–132, 

A319–133, A320–211, A320–212, A320– 

214, A320–215, A320–216, A320–231, 

A320–232, A320–233, A321–111, A321– 

112, A321–131, A321–211, A321–212, 

A321–213, A321–231 and A321–232 

airplanes. 

Model A320–215 airplanes are not 

certificated by the FAA and are not 

included on the U.S. type certificate 

data sheet; this proposed AD therefore 

does not include those airplanes in the 

applicability. 

This proposed AD was prompted by 

a report that during the inspection for 

the door stop fitting holes at FR 66 and 

FR 68 required by EASA AD 2016–0238, 

dated December 2, 2016; corrected 

January 4, 2017 (which corresponds to 

FAA AD 2018–03–12, Amendment 39– 

19185 (83 FR 5906, February 12, 2018), 

cracks were found on web horizontal 

flange and inner cap on FR 68, LH and 


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