This section of the FEDERAL REGISTER

contains notices to the public of the proposed

issuance of rules and regulations. The

purpose of these notices is to give interested

persons an opportunity to participate in the

rule making prior to the adoption of the final

rules.

Proposed Rules Federal Register

46160 

Vol. 86, No. 157 

Wednesday, August 18, 2021 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1069; Project 

Identifier 2018–CE–039–AD] 

RIN 2120–AA64 

Airworthiness Directives; Daher 

Aerospace (Type Certificate Previously 

Held by SOCATA) 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 Daher Aerospace (type certificate 

previously held by SOCATA) Model 

TBM 700 airplanes. This proposed AD 

results from mandatory continuing 

airworthiness information (MCAI) 

originated by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The unsafe condition that is 

the subject of the MCAI is ice 

accumulation on the oil cooler air inlet 

duct fin. This proposed AD would 

require modifying the oil cooler air 

induction duct. 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 October 4, 2021. 

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 Daher Aerospace, 

601 NE 10 Street, Pompano Beach, FL 

33060; phone: +1 (954) 366–3331; email: 

TBMCare@daher.com; website: https://

www.daher.com/en/aircraftmanufacturer/customer-service/. You 

may view this service information at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, MO 64106. For information 

on the availability of this material at the 

FAA, call (816) 329–4148. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–1069; 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 MCAI, any comments 

received, and other information. The 

street address for Docket Operations is 

listed above. 

FOR FURTHER INFORMATION CONTACT: Greg 

Johnson, Aviation Safety Engineer, 

FAA, General Aviation & Rotorcraft 

Section, International Validation 

Branch, 901 Locust, Room 301, Kansas 

City, MO 64106; phone: (720) 626–5462; 

fax: (816) 329–4090; email: 

greg.johnson@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 the ADDRESSES section. Include 

‘‘Docket No. FAA–2020–1069; Project 

Identifier 2018–CE–039–AD’’ 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 Greg Johnson, 

Aviation Safety Engineer, FAA, General 

Aviation & Rotorcraft Section, 

International Validation Branch, 901 

Locust, Room 301, Kansas City, MO 

64106. 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 European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2018–0133, 

dated June 22, 2018, and corrected June 

25, 2018 (referred to after this as ‘‘the 

MCAI’’), to address the unsafe condition 

on certain Daher Aerospace (type 

certificate previously held by SOCATA) 

Model TBM 700 airplanes. The MCAI 

states: 

During flight testing in icing conditions, oil 

temperature increase was observed. 

Subsequent investigation determined that the 

loss of efficiency of the oil cooler system was 

due to ice accumulation on the engine air 

induction duct fins. 

This condition, if not corrected, could lead 

to uncommanded engine in-flight shut-down 

and reduced control of the aeroplane. 

To address this potential unsafe condition, 

DAHER AEROSPACE developed MOD 70– 

0616–79 for aeroplanes in production, 

removing the 4 upper fins of the oil cooler 

air induction duct to avoid ice accumulation, 

available for in-service aeroplanes through 

the SB [Daher Aerospace Service Bulletin 70– 

254 79, dated April 18, 2018]. 


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Federal Register / Vol. 86, No. 157 / Wednesday, August 18, 2021 / Proposed Rules 46161 

For the reasons described above, this 

[EASA] AD requires modification of the oil 

cooler air induction duct. 

You may examine the MCAI in the 

AD docket at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

1069. 

Although the unsafe condition 

statement in the MCAI identifies the 

cause as ice accumulation on the engine 

air induction fin, the FAA has 

determined that this does not accurately 

identify the affected air path. The 

affected area is the oil cooler air inlet 

duct fin. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Daher Aerospace 

Service Bulletin SB 70–254, dated April 

2018. The service information specifies 

procedures for removing the four upper 

fins of the oil cooler air induction duct 

and for re-identifying the oil cooler air 

induction duct with a new part number. 

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 the ADDRESSES. 

Other Related Service Information 

The FAA also reviewed Daher 

Aerospace Service Bulletin SB 70–231, 

Revision 1, dated July 2018; and Daher 

Aerospace Service Bulletin SB 70–219, 

Revision 2, dated July 2018. The service 

information identifies the kit number 

and installation procedures for 

replacing the oil cooler air induction 

duct. 

FAA’s Determination 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with this 

State of Design Authority, it has notified 

the FAA of the unsafe condition 

described in the MCAI and service 

information referenced above. The FAA 

is issuing this NPRM after determining 

the unsafe condition described 

previously is likely to exist or develop 

on other products of the same type 

design. 

Proposed AD Requirements in This 

NPRM 

This AD requires accomplishing the 

actions specified in the service 

information already described. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect up to 

807 products of U.S. registry. The FAA 

also estimates that it would take about 

3 work-hours per product to comply 

with the requirements of this proposed 

AD. The average labor rate is $85 per 

work-hour. Required parts would cost 

about $50 per product. 

Based on these figures, the FAA 

estimates the total cost of the proposed 

AD on U.S. operators to be up to 

$246,135 at $305 per product. 

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: 

Daher Aerospace (Type Certificate 

Previously Held by SOCATA): Docket 

No. FAA–2020–1069; Project Identifier 

2018–CE–039–AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by October 4, 

2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Daher Aerospace (type 

certificate previously held by SOCATA) 

Model TBM 700 airplanes, all serial numbers, 

certificated in any category, with an oil 

cooler air induction duct part number (P/N) 

T700A7920040001, T700H792000900000, 

T700H792001900000, T700H792001900200, 

T700H792001900400, or 

T700H792001900600 installed. 

Note 1 to paragraph (c) of this AD: The 

applicable oil cooler air induction duct P/Ns 

may be installed in accordance with 

modification 70–0435–79; Daher Aerospace 

Service Bulletin SB 70–231, Revision 1, 

dated July 2018; or Daher Aerospace Service 

Bulletin SB 70–219, Revision 2, dated July 

18, 2018. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7900, Engine Oil System (Airframe). 

(e) Unsafe Condition 

This AD was prompted by mandatory 

continuing airworthiness information (MCAI) 

originated by an aviation authority of another 

country to identify and correct an unsafe 

condition on an aviation product. The unsafe 

condition that is the subject of the MCAI is 

ice accumulation on the oil cooler air inlet 

duct fin. The FAA is issuing this AD to 

prevent ice from accumulating on the oil 

cooler air induction duct fins, which could 

lead to an increase in oil temperature, 

uncommanded engine inflight shutdown, 

and reduced airplane control. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Modify the Oil Cooler Air Induction Duct 

(1) Within 3 months after the effective date 

of this AD, remove the four upper fins of the 

oil cooler air induction duct and re-identify 

the oil cooler air induction duct in 

accordance with the Description of 

Accomplishment Instructions in Daher 

Aerospace Service Bulletin SB 70–254, dated 

April 2018. 


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46162 Federal Register / Vol. 86, No. 157 / Wednesday, August 18, 2021 / Proposed Rules 

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

not install an oil cooler air induction duct P/ 

N T700A7920040001, T700H792000900000, 

T700H792001900000, T700H792001900200, 

T700H792001900400, or 

T700H792001900600 on any airplane. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, International Validation 

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 Related Information or email: 9- 

AVS-AIR-730-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 Greg Johnson, Aviation Safety 

Engineer, FAA, General Aviation & Rotorcraft 

Section, International Validation Branch, 901 

Locust, Room 301, Kansas City, MO 64106; 

phone: (720) 626–5462; fax: (816) 329–4090; 

email: greg.johnson@faa.gov. 

(2) Refer to European Aviation Safety 

Agency (EASA) AD 2018–0133, dated June 

22, 2018, and corrected June 25, 2018, for 

more information. You may examine the 

EASA AD in the AD docket at https://

www.regulations.gov by searching for and 

locating it in Docket No. FAA–2020–1069. 

(3) For service information identified in 

this AD, contact Daher Aerospace, 601 NE 10 

Street, Pompano Beach, FL 33060; phone: +1 

(954) 366–3331; email: TBMCare@daher.com. 

You may view this referenced service 

information at the FAA, Airworthiness 

Products Section, Operational Safety Branch, 

901 Locust, Kansas City, MO 64106. For 

information on the availability of this 

material at the FAA, call (816) 329–4148. 

Issued on August 4, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–17603 Filed 8–17–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0671; Project 

Identifier 2019–SW–036–AD] 

RIN 2120–AA64 

Airworthiness Directives; Leonardo 

S.p.a. Helicopters 

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 Leonardo S.p.a. Model AB139 

and AW139 helicopters. This proposed 

AD was prompted by a report of damage 

(burns) on the tail rotor blades (TRBs). 

This proposed AD would require an 

inspection of each TRB for the general 

condition and any evidence of burns 

and replacement if necessary, as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

proposed for incorporation by reference 

(IBR). 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 October 4, 2021. 

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 EASA material that is proposed 

for IBR in this AD, contact EASA, 

Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; phone: +49 221 8999 

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

internet: www.easa.europa.eu. You may 

find the EASA material on the EASA 

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

You may view this material at the FAA, 

Office of the Regional Counsel, 

Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 

76177. For information on the 

availability of this material at the FAA, 

call (817) 222–5110. This EASA 

material is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0671. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0671; 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 EASA AD, any comments 

received, and other information. The 

street address for Docket Operations is 

listed above. 

FOR FURTHER INFORMATION CONTACT: 

Jacob Fitch, Aerospace Engineer, COS 

Program Management Section, 

Operational Safety Branch, FAA, 10101 

Hillwood Pkwy., Fort Worth, TX 76177; 

phone: (817) 222–4130; email: 

jacob.fitch@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–2021–0671; Project Identifier 

2019–SW–036–AD’’ 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 Jacob Fitch, Aerospace 

Engineer, COS Program Management 

Section, Operational Safety Branch, 

FAA, 10101 Hillwood Pkwy., Fort 

Worth, TX 76177; phone: (817) 222– 

4130; email: jacob.fitch@faa.gov. Any 

commentary that the FAA receives that 

is not specifically designated as CBI will 


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