51026 Federal Register / Vol. 86, No. 175 / Tuesday, September 14, 2021 / Proposed Rules 

01H004–041, M006–01H004–045, or M006– 

01H004–053 on any helicopter, unless it is 

marked with a black dot indicating that it has 

passed inspections specified by Leonardo 

Helicopters BT 139–450. 

(j) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2018–0112R1 

specifies to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(k) 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 International Validation 

Branch, send it to the attention of the person 

identified in paragraph (l)(2) of this AD. 

Information may be emailed to: 9-AVS-AIR730-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. 

(l) Related Information 

(1) For EASA AD 2018–0112R1, 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 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 material may be found in the AD docket 

at https://www.regulations.gov by searching 

for and locating Docket No. FAA–2020–0283. 

(2) For more information about this AD, 

contact Matt Fuller, AD Program Manager, 

General Aviation & Rotorcraft Unit, 

Airworthiness Products Section, Operational 

Safety Branch, FAA, 10101 Hillwood Pkwy., 

Fort Worth, TX 76177; telephone (817) 222– 

5110; email matthew.fuller@faa.gov. 

Issued on September 7, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–19607 Filed 9–13–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0781; Project 

Identifier AD–2021–00775–E] 

RIN 2120–AA64 

Airworthiness Directives; Austro 

Engine GmbH Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2021–09–04, which applies to all Austro 

Engine GmbH E4 and E4P model diesel 

piston engines. AD 2021–09–04 requires 

replacing a certain oil pump as well as 

the oil filter and engine oil. Since the 

FAA issued AD 2021–09–04, the FAA 

determined that the requirement to 

replace the oil pump should be limited 

to only Austro Engine E4 and E4P 

model diesel piston engines with a 

certain oil pump, identified by part 

number (P/N) and serial number (S/N), 

installed. This proposed AD would 

require replacing a certain oil pump, the 

oil filter, and the engine oil installed on 

Austro Engine GmbH E4 and E4P model 

diesel piston engines. 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 14, 

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 Austro Engine 

GmbH, Rudolf-Diesel-Strasse 11, 2700 

Weiner Neustadt, Austria; phone: +43 

2622 23000; website: 

www.austroengine.at. You may view 

this service information at the 

Airworthiness Products Section, 

Operational Safety Branch, FAA, 1200 

District Avenue, Burlington, MA 01803. 

For information on the availability of 

this material at the FAA, call (781) 238– 

7759. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0781; 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: 

Wego Wang, Aviation Safety Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

(781) 238–7134; fax: (781) 238–7199; 

email: wego.wang@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–2021–0781; Project Identifier AD– 

2021–00775–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 the 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 we receive 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 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 


tkelley on DSK125TN23PROD with PROPOSALS
Federal Register / Vol. 86, No. 175 / Tuesday, September 14, 2021 / Proposed Rules 51027 

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 Wego Wang, 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 issued AD 2021–09–04, 

Amendment 39–21517 (86 FR 21637, 

April 23, 2021), (AD 2021–09–04), for 

all Austro Engine GmbH E4 and E4P 

model diesel piston engines. AD 2021– 

09–04 was prompted by reports of an oil 

pump blockage on E4 model diesel 

piston engines. AD 2021–09–04 requires 

replacing a certain oil pump as well as 

the oil filter and engine oil. The agency 

issued AD 2021–09–04 to prevent 

failure of the engine lubrication system. 

Actions Since AD 2021–09–04 Was 

Issued 

Since the FAA issued AD 2021–09– 

04, the FAA determined that the 

requirement to replace the oil pump 

should be limited to only Austro Engine 

E4 and E4P model diesel piston engines 

with a certain oil pump installed, 

identified by P/N and S/N in Austro 

Engine GmbH Mandatory Service 

Bulletin No. MSB–E4–030/4, Revision 

No. 4, dated March 30, 2021. 

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 Austro Engine 

GmbH Mandatory Service Bulletin No. 

MSB–E4–030/4, Revision No. 4, dated 

March 30, 2021 (the MSB). This service 

information specifies procedures for 

replacing the affected oil pumps 

installed on E4 and E4P model diesel 

piston engines. This service information 

also specifies procedures for replacing 

the oil filter and engine oil installed on 

these engines. In addition, this service 

information identifies the applicable S/ 

Ns of affected E4 and E4P model diesel 

piston engines, the affected oil pumps 

requiring replacement, and an 

additional oil pump replacement 

option. The Director of the Federal 

Register previously approved the MSB 

for incorporation by reference on May 

10, 2021 (86 FR 21637, April 23, 2021). 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in ADDRESSES. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would retain 

certain requirements of AD 2021–09–04. 

This proposed AD would require 

replacement of an affected oil pump, 

identified by P/N and S/N in the MSB. 

This proposed AD would also require 

replacement of the oil filter and engine 

oil. 

Differences Between This Proposed AD 

and the Service Information 

The MSB specifies that the removed 

oil pump must be returned to Austro 

Engine GmbH. The MSB specifies that 

information, including the engine flight 

hours (FHs) recorded at the time of the 

oil pump replacement, must be sent to 

Austro Engine GmbH. This proposed 

AD would not mandate sending the 

removed oil pump or information, 

including the engine FHs recorded at 

the time of oil pump replacement, to 

Austro Engine GmbH. 

The MSB also specifies that for all 

engines with 10 FHs or less, to replace 

the affected oil pump, oil filter, and 

engine oil before the next flight. 

Whereas, this proposed AD would 

require, for Group 1 and Group 2 

engines with 10 FHs or less, 

replacement of a certain oil pump, oil 

filter, and engine oil within 30 days, 

before accumulating 10 FHs, or during 

the next scheduled maintenance, 

whichever occurs first after the effective 

date of this proposed AD. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 55 

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 oil pump, oil filter, and engine oil.16 work-hours × $85 per hour = 

$1,360.

$1,488 $2,848 $156,640 

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 

individuals. 

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 that the proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Would not affect intrastate 

aviation in Alaska, and 


tkelley on DSK125TN23PROD with PROPOSALS
51028 Federal Register / Vol. 86, No. 175 / Tuesday, September 14, 2021 / Proposed Rules 

(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: 

■ a. Removing Airworthiness Directive 

2021–09–04, Amendment 39–21517 (86 

FR 21637, April 23, 2021); and 

■ b. Adding the following new 

airworthiness directive: 

Austro Engine GmbH: Docket No. FAA– 

2021–0781; Project Identifier AD–2021– 

00775–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) action by 

October 14, 2021. 

(b) Affected ADs 

This AD replaces AD 2021–09–04, 

Amendment 39–21517 (86 FR 21637, April 

23, 2021). 

(c) Applicability 

This AD applies to all Austro Engine 

GmbH E4 and E4P model diesel piston 

engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 8550, Reciprocating Engine Oil System. 

(e) Unsafe Condition 

This AD was prompted by reports of an oil 

pump blockage on the E4 model diesel piston 

engines. The FAA is issuing this AD to 

prevent failure of the engine lubrication 

system. The unsafe condition, if not 

addressed, could result in failure of the 

engine, in-flight shutdown, and loss of the 

airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

For Austro Engine GmbH E4 and E4P 

model diesel piston engines having an oil 

pump, part number (P/N) E4A–50–000–BHY, 

with a serial number (S/N) listed in 

paragraph 1.2., Engines Affected, of Austro 

Engine GmbH Mandatory Service Bulletin 

No. MSB–E4–030/4, Revision No. 4, dated 

March 30, 2021 (the MSB), within the 

compliance time specified in Table 1 to 

paragraph (g) of this AD or before further 

flight, whichever occurs later: 

(1) Remove the oil pump, P/N E4A–50– 

000–BHY, from service and replace with a 

part eligible for installation using the 

Accomplishment/Instructions, paragraph 

2.2.1 or paragraph 2.2.2, of the MSB, as 

applicable. 

(2) Replace the oil filter and engine oil 

using the Accomplishment/Instructions, 

paragraph 2.2.1 or paragraph 2.2.2, of the 

MSB, as applicable. 


tkelley on DSK125TN23PROD with PROPOSALSEP14SE21.002</GPH>

Table 1 to Paragraph (g)-Replacement of the Oil Pump, Oil Filter, and Engine Oil 

Engine Group Engine Flight Hours Compliance Time (after May 

(FHs) Since New as 10, 2021, the effective date of 

of May 10, 2021 (the AD 2021-09-04) 

effective date of AD 

2021-09-04) 

Group 1 engines and 10 FHs or less Within 30 days or before 

Group 2 engines accumulating 10 FHs, or during 

the next scheduled maintenance, 

whichever occurs first 

Group 1 engines More than 10 FHs, Within 3 months or before 

but less than 50 FHs accumulating 70 FHs since 

new, or during the next 

scheduled maintenance, 

whichever occurs first 

Group 1 engines 50 FHs or more Within 3 months or 20 FHs, or 

during the next scheduled 

maintenance, whichever occurs 

first 

Group 2 engines More than 10 FHs Within 3 months or 100 FHs, or 

during the next scheduled 

maintenance, whichever occurs 

first 
Federal Register / Vol. 86, No. 175 / Tuesday, September 14, 2021 / Proposed Rules 51029 

(h) No Reporting Requirements 

The reporting requirements in the 

Accomplishment/Instructions, paragraph 

2.2., of the MSB, are not required by this AD. 

(i) Installation Prohibition 

After the effective date of this AD, do not 

install onto any engine an oil pump, P/N 

E4A–50–000–BHY, with an S/N listed in 

paragraph 1.2., Engines Affected, of the MSB. 

(j) Definitions 

For the purpose of this AD: 

(1) Group 1 engines are E4 model diesel 

piston engines in configuration ‘‘-A’’ that are 

installed on single-engine airplanes. 

(2) Group 2 engines are E4 model diesel 

piston engines in configuration ‘‘-B’’ or ‘‘-C’’ 

and E4P model diesel piston engines that are 

installed on twin-engine airplanes. 

(3) A ‘‘part eligible for installation’’ is an 

oil pump with a P/N and S/N that is not 

listed in paragraph 1.2., Engines Affected, of 

the MSB. 

(k) Credit for Previous Actions 

You may take credit for replacing the oil 

pump, oil filter, and engine oil required by 

paragraph (g) of this AD if you performed 

these replacements before the effective date 

of this AD using the Accomplishment/ 

Instructions, paragraph 2.2., of Austro Engine 

GmbH MSB No. MSB–E4–030, Original Issue, 

dated February 18, 2021; Revision No. 1, 

dated February 23, 2021; Revision No. 2, 

dated March 3, 2021; or Revision No. 3, dated 

March 18, 2021. 

(l) 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 (m)(1) of this AD. 

Information may be emailed to: ANE-ADAMOC@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. 

(m) Related Information 

(1) For more information about this AD, 

contact Wego Wang, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

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

238–7134; fax: (781) 238–7199; email: 

wego.wang@faa.gov. 

(2) For service information identified in 

this AD, contact Austro Engine GmbH, 

Rudolf-Diesel-Strasse 11, 2700 Weiner 

Neustadt, Austria; phone: +43 2622 23000; 

website: www.austroengine.at. 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 (781) 238–7759. 

Issued on September 7, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–19628 Filed 9–13–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0784; Project 

Identifier MCAI–2020–01455–T] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. 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 Bombardier, Inc., Model CL– 

600–1A11 (600), CL–600–2A12 (601), 

and CL–600–2B16 (601–3A, 601–3R, 

and 604 Variants) airplanes. This 

proposed AD was prompted by a 

determination that new or more 

restrictive airworthiness limitations are 

necessary. This proposed AD would 

require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations. 

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 29, 

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 Bombardier, Inc., 

200 Coˆte Vertu Road West, Dorval, 

Que ́bec H4S 2A3, Canada; North 

America toll-free telephone 1–866–538– 

1247 or direct-dial telephone 1–514– 

855–2999; email ac.yul@

aero.bombardier.com; internet https://

www.bombardier.com. You may view 

this service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0784; 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: 

Elizabeth Dowling, Aerospace Engineer, 

Mechanical Systems and Administrative 

Services Section, FAA, New York ACO 

Branch, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 

516–228–7300; fax 516–794–5531; email 

9-avs-nyaco-cos@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–2021–0784; Project Identifier 

MCAI–2020–01455–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 the 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 NPRM 


tkelley on DSK125TN23PROD with PROPOSALS