[Federal Register Volume 87, Number 19 (Friday, January 28, 2022)]
[Rules and Regulations]
[Pages 4471-4476]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-01818]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0013; Project Identifier MCAI-2021-01371-E; 
Amendment 39-21920; AD 2022-03-03]
RIN 2120-AA64


Airworthiness Directives; Austro Engine GmbH Engines

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule; request for comments.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2021-22-20 
which applied to certain Austro Engine GmbH E4 and E4P model diesel 
piston engines. AD 2021-22-20 required, for engines with an affected 
cylinder head, inspection of the high pressure pump (HPP) driving gear 
and, depending on the results of the inspection, replacement of the HPP 
driving gear with a part eligible for installation. AD 2021-22-20 also 
required, for engines with an affected HPP driving gear, replacement of 
the HPP driving gear before further flight or within a certain number 
of flight hours, depending on the engine configuration and number of 
affected engines installed. This AD requires, for engines equipped with 
a certain cylinder head and HPP driving gear combination, removal, 
inspection, and replacement of the HPP driving gear before further 
flight and, depending on the inspection findings, replacement of the 
HPP shaft, cylinder head, camshaft gear, or inlet/outlet camshaft 
bushing. This AD also requires, for engines with an affected HPP 
driving gear, replacement of the HPP driving gear before further flight 
or within a certain number of flight hours, depending on the engine 
configuration and number of affected engines installed. This AD was 
prompted by reports of failure of the HPP driving gear and a subsequent 
determination that a batch of HPP driving gears may have been damaged 
during assembly. This AD was also prompted by an investigation which 
found that certain cylinder heads installed in combination with certain 
HPP driving gear on the same engine may cause damage to the HPP driving 
gear. The FAA is issuing this AD to address the unsafe condition on 
these products.

DATES: This AD is effective February 14, 2022.
    The Director of the Federal Register approved the incorporation by 
reference

[[Page 4472]]

of a certain publication listed in this AD as of February 14, 2022.
    The FAA must receive any comments on this AD by March 14, 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 final rule, contact 
Austro Engine GmbH, Rudolf-Diesel-Strasse 11, 2700 Weiner Neustadt, 
Austria; phone: +43 2622 23000; website: https://www.austroengine.at. 
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. It is also available at 
https://www.regulations.gov by searching for and locating Docket No. 
FAA-2022-0013.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2022-0013; 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 final rule, 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: Wego Wang, Aviation Safety Engineer, 
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 
(781) 238-7134; fax: (781) 238-7199; email: [email protected].

SUPPLEMENTARY INFORMATION:

Background

    The FAA issued AD 2021-22-20, Amendment 39-21793 (86 FR 60159, 
November 1, 2021), (AD 2021-22-20), for Austro Engine GmbH E4 and E4P 
model diesel piston engines with a certain cylinder head or HPP driving 
gear installed.
    AD 2021-22-20 required, for engines with an affected cylinder head, 
inspection of the HPP driving gear and, depending on the results of the 
inspection, replacement of the HPP driving gear with a part eligible 
for installation. AD 2021-22-20 also required, for engines with an 
affected HPP driving gear, replacement of the HPP driving gear either 
before further flight or within a certain number of flight hours, 
depending on the engine configuration and number of affected engines 
installed. AD 2021-22-20 resulted from reports of failure of the HPP 
driving gear and a subsequent investigation by the manufacturer, which 
determined that a certain batch of HPP driving gears may have been 
damaged during assembly. The investigation also determined that 
affected engines equipped with an affected cylinder head were also 
subject to premature failure of the HPP driving gear. The FAA issued AD 
2021-22-20 to prevent the failure of the HPP driving gear.

Actions Since AD 2021-22-20 Was Issued

    Since the FAA issued AD 2021-22-20, the European Union Aviation 
Safety Agency (EASA), which is the Technical Agent for the Member 
States of the European Community, has issued EASA AD 2021-0274-E, dated 
December 9, 2021, to address an unsafe condition for the specified 
products. The MCAI states:

    Occurrences were reported of HPP driving gear failure. 
Subsequent investigation determined that a certain batch of HPP 
driving gears was produced with a worn out assembly tool P/N 
AE300T012-1. Those HPP driving gears may have been damaged during 
assembly. Concurrently, it was determined that, for engines equipped 
with a certain cylinder head, a stack up of tolerances exists 
between the cylinder head, cylinder head backside cover, camshaft 
gear and HPP driving gear. Both scenarios could result in premature 
HPP driving gear failure.
    This condition, if not detected and corrected, could lead to 
engine in-flight shut-down with consequent forced landing, possibly 
resulting in damage to the aeroplane and injury to occupants.
    To address this potential unsafe condition, Austro Engine 
published MSB-E4-035 to provide instructions for HPP driving gear 
inspection on engines equipped with a cylinder head P/N E4A-12-500-
000, and MSB-E4-034/1 to provide instructions for replacement of 
affected HPP gears, as defined in this [EASA] AD. Consequently, EASA 
issued Emergency AD 2021-0203-E (later revised) to require 
inspection and/or replacement of HPP gears.
    Since that [EASA] AD was issued, it has been determined that an 
affected cylinder head/HPP driving gear combination, as defined in 
this [EASA] AD, may cause damage to the HPP driving gears. Austro 
Engine issued the SB, as defined in this [EASA] AD, incorporating 
the requirements of MSB-E4-034/1 and MSB-E4-035, to provide 
instructions for HPP driving gear inspection and replacement. The SB 
also prohibits (re-)installation of a HPP driving gear E4A-30-000-
601 or P/N E4A-30-000-201 rev. AB.1 on engines having a cylinder 
head P/N E4A-12-500-000 installed. The SB further removes from the 
list of affected HPP driving gears certain engines and HPPs, which 
were reworked by Austro Engine pending approval of MSB-E4-034.
    For the reason described above, this [EASA] AD partially retains 
the requirements of EASA AD 2021-0203R1, which is superseded, and 
requires replacement of the HPP driving gear on engines with an 
affected cylinder head/HPP driving gear combination installed. This 
[EASA] AD also provides requirements for HPP driving gear 
installation.

    You may obtain further information by examining the MCAI in the AD 
docket at https://www.regulations.gov by searching for and locating 
Docket No. FAA-2022-0013.
    The FAA is issuing this AD to address the unsafe condition on these 
products.

FAA's Determination

    This product has been approved by EASA and is approved for 
operation in the United States. Pursuant to our bilateral agreement 
with the European Community, EASA has notified the FAA of the unsafe 
condition described in the MCAI. The FAA is issuing this AD because the 
agency evaluated all the relevant information provided by EASA and has 
determined that the unsafe condition described previously is likely to 
exist or develop in other products of the same type design.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed Austro Engine Mandatory Service Bulletin No. MSB-
E4-036/1, Revision No. 1, dated December 14, 2021 (MSB-E4-036/1). This 
service information specifies procedures for inspecting and replacing 
HPP driving gears installed on E4 and E4P model diesel piston engines 
equipped with an affected cylinder head. Austro Engine MSB-E4-036/1 
also identifies the applicable part number and serial numbers of 
affected HPP driving gears and affected cylinder head/HPP driving gear 
combinations installed on Austro Engine GmbH E4 and E4P model diesel 
piston 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.

AD Requirements

    This AD requires, for engines equipped with an affected cylinder 
head and HPP driving gear combination,

[[Page 4473]]

removal, inspection, and replacement of the HPP driving gear before 
further flight and, depending on the inspection findings, replacement 
of the HPP shaft, cylinder head, camshaft gear, or inlet/outlet 
camshaft bushing. This AD also requires, for engines with an affected 
HPP driving gear, replacement of the HPP driving gear before further 
flight or within a certain number of flight hours, depending on the 
engine configuration and number of affected engines installed.

Differences Between This AD and the MCAI

    The MCAI requires inspection and replacement of the HPP driving 
gear using Austro Engine MSB-E4-036, Initial Issue, dated November 30, 
2021, while this AD requires using Austro Engine MSB-E4-036/1 to 
inspect and replace the HPP driving gear.

Justification for Immediate Adoption and Determination of the Effective 
Date

    Section 553(b)(3)(B) of the Administrative Procedure Act (APA) (5 
U.S.C. 551 et seq.) authorizes agencies to dispense with notice and 
comment procedures for rules when the agency, for ``good cause,'' finds 
that those procedures are ``impracticable, unnecessary, or contrary to 
the public interest.'' Under this section, an agency, upon finding good 
cause, may issue a final rule without providing notice and seeking 
comment prior to issuance. Further, section 553(d) of the APA 
authorizes agencies to make rules effective in less than thirty days, 
upon a finding of good cause.
    An unsafe condition exists that requires the immediate adoption of 
this AD without providing an opportunity for public comments prior to 
adoption. The FAA has found that the risk to the flying public 
justifies foregoing notice and comment prior to adoption of this rule. 
The FAA received a report of occurrences of failure of the HPP driving 
gear. The manufacturer subsequently determined that a certain batch of 
HPP driving gears was produced with a worn out assembly tool, and may 
have been damaged during assembly. The manufacturer determined that, 
for engines equipped with a certain cylinder head, a stack up of 
tolerances exists between the cylinder head, cylinder head cover, 
camshaft gear and HPP driving gear. Since the FAA issued AD 2021-22-20 
the manufacturer determined that the combination of a certain affected 
cylinder head installed with a certain affected HPP driving gear on the 
same engine may cause damage to the HPP driving gear. These conditions 
could result in failure of the HPP driving gear. Austro Engine 
subsequently published Austro Engine MSB-E4-036/1, Revision No. 1, 
dated December 14, 2021, providing instructions for inspection and 
replacement of certain HPP driving gears installed on Austro Engine E4 
and E4P model diesel piston engines. In response, EASA issued EASA 
Emergency AD 2021-0274-E, dated December 9, 2021, to require inspection 
and replacement of the HPP driving gear on engines with an affected 
cylinder head and HPP driving gear combination before next flight.
    Failure of the HPP driving gear can result in in-flight engine 
shut-down, forced landing, and damage to the airplane. The FAA 
considers failure of the HPP driving gear to be an urgent safety issue 
that requires immediate action to avoid damage to the airplane. For 
engines with an affected cylinder head, if the HPP driving gear does 
not pass the inspection required by this AD, this AD requires 
inspection and possible replacement of the HPP shaft, cylinder head, 
camshaft gear, and inlet/outlet camshaft bushing before further flight. 
In addition, for engines with an affected HPP driving gear with a 
certain number of flight hours accumulated on the HPP driving gear, 
this AD requires replacement of the HPP driving gear before further 
flight.
    Accordingly, notice and opportunity for prior public comment are 
impracticable and contrary to the public interest pursuant to 5 U.S.C. 
553(b)(3)(B). In addition, the FAA finds that good cause exists 
pursuant to 5 U.S.C. 553(d) for making this amendment effective in less 
than 30 days, for the same reasons the FAA found good cause to forgo 
notice and comment.

Comments Invited

    The FAA invites you to send any written data, views, or arguments 
about this final rule. Send your comments to an address listed under 
ADDRESSES. Include ``Docket No. FAA-2022-0013 and Project Identifier 
MCAI-2021-01371-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 final rule 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 final rule.

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 AD 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 AD, 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 AD. 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.

Regulatory Flexibility Act

    The requirements of the Regulatory Flexibility Act (RFA) do not 
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt 
a rule without prior notice and comment. Because FAA has determined 
that it has good cause to adopt this rule without prior notice and 
comment, RFA analysis is not required.

Costs of Compliance

    The FAA estimates that this AD affects 418 engines installed on 
airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this AD:

[[Page 4474]]



                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                     Cost per      Cost on U.S.
                Action                         Labor cost           Parts cost        product        operators
----------------------------------------------------------------------------------------------------------------
Inspect HPP driving gear..............  .5 work-hours x $85 per               $0          $42.50         $17,765
                                         hour = $42.50.
Replace HPP driving gear..............  2 work-hours x $85 per               145             315         131,670
                                         hour = $170.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary 
replacements that would be required based on the results of the 
inspection. The agency has no way of determining the number of aircraft 
that might need this replacement:

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                 Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
Inspect and replace HPP shaft.................  5 work-hours x $85 per hour =          $2,385.80       $2,810.80
                                                 $425.
Inspect and replace cylinder head.............  16 work-hours x $85 per hour =         18,530.50       19,890.50
                                                 $1,360.
Inspect and replace camshaft gear.............  10 work-hours x $85 per hour =          2,371.20        3,221.20
                                                 $850.
Inspect and replace inlet/outlet camshaft       10 work-hours x $85 per hour =          2,371.20        3,221.20
 bushing.                                        $850.
----------------------------------------------------------------------------------------------------------------

    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some of the costs of this 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

    This AD will not have federalism implications under Executive Order 
13132. This AD will 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 this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866, and
    (2) Will not affect intrastate aviation in Alaska.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13   [Amended]

0
2. The FAA amends Sec.  39.13 by:
0
a. Removing Airworthiness Directive 2021-22-20, Amendment 39-21793 (86 
FR 60159, November 1, 2021); and
0
b. Adding the following new airworthiness directive:

2022-03-03 Austro Engine GmbH: Amendment 39-21920; Docket No. FAA-
2022-0013; Project Identifier MCAI-2021-01371-E.

(a) Effective Date

    This airworthiness directive (AD) is effective February 14, 
2022.

(b) Affected ADs

    This AD replaces AD 2021-22-20, Amendment 39-21793 (86 FR 60159, 
November 1, 2021).

(c) Applicability

    This AD applies to Austro Engine GmbH E4 and E4P model diesel 
piston engines equipped with either:
    (1) A cylinder head having part number (P/N) E4A-12-500-000, 
installed in combination with high-pressure pump (HPP) driving gear 
P/N E4A-30-000-601 (any revision), P/N E4A-30-000-201 rev. AB.1, or 
P/N E4A-30-000-201 with a serial number (S/N) listed in Chapter 1.4, 
Table 1 of Austro Engine Mandatory Service Bulletin No. MSB-E4-036/
1, Revision No. 1, dated December 14, 2021 (MSB-E4-036/1); or
    (2) An HPP driving gear, having P/N E4A-30-000-201, with an S/N 
listed in Chapter 1.4, Table 1 of Austro Engine MSB-E4-036/1.

(d) Subject

    Joint Aircraft System Component (JASC) Code 8520, Reciprocating 
Engine Power Section.

(e) Unsafe Condition

    This AD was prompted by reports of failure of the HPP driving 
gear and a subsequent investigation by the manufacturer, which 
determined that a certain batch of HPP driving gears may have been 
damaged during assembly. The investigation also determined that the 
combination of a certain affected cylinder head installed on an 
engine with a certain affected HPP driving gear installed on the 
same engine may cause damage to the HPP driving gear. The FAA is 
issuing this AD to prevent the failure of the HPP driving gear. The 
unsafe condition, if not addressed, could result in in-flight engine 
shut-down, forced landing, and damage to the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    (1) For engines equipped with a cylinder head and HPP driving 
gear combination identified in paragraph (c)(1) of this AD, before 
further flight after the effective date of

[[Page 4475]]

this AD, remove the HPP driving gear and replace it with an HPP 
driving gear eligible for installation using paragraphs 2.1.1 
through 2.1.4., Removal and inspection of the HPP driving gear, of 
Austro Engine MSB-E4-036/1.
    (2) Before further flight after performing the required actions 
in paragraph (g)(1) of this AD, visually inspect the removed HPP 
driving gear using the criteria in paragraph 7. Appendix II, Table 
6, of Austro Engine MSB-E4-036/1.
    (3) If, based on the visual inspection required by paragraph 
(g)(2) of this AD, the HPP driving gear does not meet the acceptable 
condition criteria in paragraph 7. Appendix II, Table 6, of Austro 
Engine MSB-E4-036/1, before further flight, visually inspect the HPP 
shaft, cylinder head, camshaft gear, and inlet/outlet camshaft 
bushing using the criteria in paragraph 7. Appendix II, Table 7, of 
Austro Engine MSB-E4-036/1.
    (4) If, based on the visual inspection required by paragraph 
(g)(3) of this AD, the HPP shaft, cylinder head, camshaft gear, or 
inlet/outlet camshaft bushing do not meet the acceptable condition 
criteria in paragraph 7. Appendix II, Table 7, of Austro Engine MSB-
E4-036/1, before further flight, remove any part not meeting the 
acceptable condition criteria and replace with a part eligible for 
installation.
    (5) For engines equipped with an affected HPP driving gear 
identified in paragraph (c)(2) of this AD, within the compliance 
time specified in Table 1 to paragraph (g)(5) of this AD, as 
applicable, replace the HPP driving gear with an HPP driving gear 
eligible for installation.
[GRAPHIC] [TIFF OMITTED] TR28JA22.002

(h) Definitions

    (1) For the purpose of this AD, an HPP driving gear eligible for 
installation is:
    (i) An HPP driving gear that is not identified in paragraph 
(c)(2) of this AD; or
    (ii) An HPP driving gear that does not create a cylinder head 
and HPP driving gear combination identified in paragraph (c)(1) of 
this AD.
    (2) For the purpose of this AD, an HPP shaft, cylinder head, 
camshaft gear, and inlet/outlet camshaft bushing eligible for 
installation is:
    (i) An HPP shaft, cylinder head, camshaft gear, and inlet/outlet 
camshaft bushing that meets the acceptable condition criteria in 
paragraph 7. Appendix II, Table 7, of Austro Engine MSB-E4-036/1; or
    (ii) An HPP shaft, cylinder head, camshaft gear, and inlet/
outlet camshaft bushing that is a new (zero hour) part.
    (3) For the purpose of this AD, Engine Group 1 is Austro Engine 
E4 model engines in configuration ``-A'' installed on single engine 
airplanes.
    (4) For the purpose of this AD, Engine Group 2 is Austro Engine 
E4 model engines in configuration ``-B'' or ``-C'' and Austro Engine 
E4P model engines installed on twin-engine airplanes.

(i) No Reporting Requirement

    The reporting instructions specified in paragraph 7. Appendix 
II, Tables 6 and 7, of Austro Engine MSB-E4-036/1 are not required 
by this AD.

(j) Special Flight Permit

    A special flight permit may be issued in accordance with 14 CFR 
21.197 and 21.199 to permit a single ferry flight to a location 
where the actions required by this AD can be accomplished on a twin-
engine airplane that has one or two Austro Engine E4 model engines 
in configuration ``-B'' or ``-C'', or Austro Engine E4P model 
engines, installed.

(k) 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 (l)(1) of this AD. You may email your 
request to: [email protected].
    (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 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: [email protected].
    (2) Refer to European Union Aviation Safety Agency (EASA) AD 
2021-0274-E, dated December 9, 2021, for more information. You may 
examine the EASA AD in the AD docket at https://www.regulations.gov 
by searching for and locating Docket No. FAA-2022-0013.

(m) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (i) Austro Engine Mandatory Service Bulletin No. MSB-E4-036/1, 
Revision No. 1, dated December 14, 2021.
    (ii) [Reserved]
    (3) For Austro Engine service information identified in this AD, 
contact Austro Engine GmbH, Rudolf-Diesel-Strasse 11, 2700 Weiner 
Neustadt, Austria; phone: +43 2622 23000; website: https://www.austroengine.at.
    (4) 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.
    (5) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, email: [email protected], or go to:

[[Page 4476]]

https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on January 19, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2022-01818 Filed 1-26-22; 11:15 am]
BILLING CODE 4910-13-P