DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0459; Project Identifier MCAI-2021-00266-E;
Amendment 39-22102; AD 2022-13-16]
Airworthiness Directives; GE Aviation Czech s.r.o. (Type
Certificate Previously held by WALTER Engines a.s., Walter a.s., and
MOTORLET a.s.) Turboprop Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
SUMMARY: The FAA is adopting a new airworthiness directive (AD)
GE Aviation Czech s.r.o. (GEAC) M601D-11 model turboprop engines. This
AD was prompted by the manufacturer revising the airworthiness
limitations section (ALS) of the existing engine maintenance manual
(EMM) to include a visual inspection of the centrifugal compressor case
for cracks. This AD requires revising the ALS of the existing EMM to
incorporate a visual inspection of the centrifugal compressor case. The
FAA is issuing this AD to address the unsafe condition on these
DATES: This AD is effective August 1, 2022.
ADDRESSES: For service information identified in this final rule,
contact GE Aviation Czech, Beranovych 65, 199 02 Praha 9-
Letnany, Czech Republic; phone: +420 222 538 999; email:
email@example.com. You may view this service information at the FAA,
Airworthiness Products Section, Operational Safety Branch, 1200
District Avenue, Burlington, MA 01803. For information on the
availability of this material at the FAA, call (817) 222-5110.
Examining the AD Docket
You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2022-0459; 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 address for Docket Operations is
U.S. Department of Transportation, Docket Operations, M-30, West
Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE,
Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Barbara Caufield, Aviation Safety
Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803;
phone: (781) 238-7146; email: firstname.lastname@example.org.
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to all GEAC M601D-11 model
turboprop engines. The NPRM published in the Federal Register on April
14, 2022 (87 FR 22149). The NPRM was prompted by the manufacturer
revising the ALS of the existing EMM to include a visual inspection of
the centrifugal compressor case for cracks. In the NPRM, the FAA
proposed to require revising the ALS of the existing EMM to incorporate
a visual inspection of the centrifugal compressor case for cracks. In
the NPRM, the FAA proposed that an owner/operator (pilot) holding at
least at least a private pilot certificate may revise the ALS of the
existing EMM, and the owner/operator must enter compliance with the
applicable paragraphs of the AD into the aircraft records in accordance
with 14 CFR 43.9(a) and 14 CFR 91.417(a)(2)(v). This is an exception to
the FAA's standard maintenance regulations. The FAA is issuing this AD
to address the unsafe condition on these products.
The European Union Aviation Safety Agency (EASA), which is the
Technical Agent for the Member States of the European Union, has issued
EASA AD 2021-0060, dated March 3, 2021 (referred to after this as ``the
MCAI''), to address the unsafe condition on these products. The MCAI
The airworthiness limitations for certain M601 engine models,
which are approved by EASA, are currently defined and published in
These instructions have been identified as mandatory for
Failure to accomplish these instructions could result in an
Recently, GEAC published the ALS, as defined in this [EASA] AD,
introducing a visual inspection of the Centrifugal Compressor Case.
For the reason described above, this [EASA] AD requires
accomplishment of the actions specified in the ALS.
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-2022-0459.
Discussion of Final Airworthiness Directive
The FAA received no comments on the NPRM or on the determination of
the cost to the public.
The FAA reviewed the relevant data and determined that air safety
requires adopting this AD as proposed. Accordingly, the FAA is issuing
this AD to address the unsafe condition on these products. This AD is
adopted as proposed in the NPRM.
Related Service Information
The FAA reviewed GE Aviation Czech Airworthiness Limitations R18,
Section 5. Mandatory Inspections, of the GE Aviation Czech EMM, Part
No. 0982309, Revision No. 18, dated December 18, 2020 (Airworthiness
Limitations R18, Section 5. Mandatory Inspections). Airworthiness
Limitations R18, Section 5. Mandatory Inspections, of the EMM describe
procedures for performing a visual inspection of the centrifugal
compressor case for cracks.
Costs of Compliance
The FAA estimates that this AD affects 7 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
|Revise the ALS of the EMM
||1 work-hour x $85 per hour =
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.
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 this AD:
(1) Is not a ``significant regulatory action'' under Executive
(2) Will not affect intrastate aviation in Alaska, and
(3) Will 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
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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.
Sec. 39.13 [Amended]
2. The FAA amends Sec. 39.13 by adding the following new airworthiness