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Federal Register / Vol. 86, No. 156 / Tuesday, August 17, 2021 / Rules and Regulations Costs of Compliance
course of business or by the means identified in ADDRESSES.

The FAA estimates that this AD
affects 33 engines installed on airplanes of U.S. registry.

45859

The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS
Action
Labor cost
Functional Inspection of FCU
Replace FCU

0.50 work-hours $85 per hour = $42.50
4 work-hours $85 per hour = $340

Authority for This Rulemaking Title 49 of the United States Code specifies the FAAs 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 Agencys 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.

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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 this AD:
1 Is not a significant regulatory action under Executive Order 12866, 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 reference, Safety.
Adoption of the Amendment Accordingly, under the authority delegated to me by the Administrator,
VerDate Sep<11>2014

16:18 Aug 16, 2021

Jkt 253001

Parts cost
the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20211510 GE Aviation Czech s.r.o. Type Certificate previously held by WALTER
Engines a.s., Walter a.s., and MOTORLET a.s.: Amendment 39
21657; Docket No. FAA20210316;
Project Identifier MCAI202000461E.
a Effective Date This airworthiness directive AD is effective September 21, 2021.
b Affected ADs None.
c Applicability This AD applies to GE Aviation Czech s.r.o. GEAC Type Certificate previously held by WALTER Engines a.s., Walter a.s., and MOTORLET a.s. H75200, H80100, and H80200 model turboprop engines.
d Subject Joint Aircraft System Component JASC
Code 7321, Fuel Control/Turbine Engines.
e Unsafe Condition This AD was prompted by several reports of engine gas generator speed Ng rollbacks below idle on GEAC H75200, H80100, and H80200 model turboprop engines with a fuel control unit FCU, part number P/N
LUN 6590.078, installed. The FAA is issuing this AD to prevent engine Ng rollbacks below idle on engines equipped with an FCU, P/N LUN 6590.078. The unsafe condition, if not addressed, could result in loss of engine power and loss of control of the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.

PO 00000

Frm 00005

Fmt 4700

Sfmt 4700

Cost per product
$0
25,000

$42.50
25,340

Cost on U.S.
operators $1,402.50
836,220

g Required Actions 1 Within 100 flight hours FHs after the effective date of this AD, and thereafter at intervals not to exceed 100 FHs since the previous inspection, perform a functional inspection of the FCU, P/N LUN 6590.078, using the Accomplishment Instructions, paragraph 2.1.1, Ground Check Procedure, of GE Aviation Czech Alert Service Bulletin No.
ASBH80730000005200/ASBH75
730000002200 single document, Revision 00, dated February 6, 2020 the ASB.
2 If, during any functional inspection required by paragraph g1 of this AD, the engine Ng is:
i Equal to or greater than 57% up to and including 60%, then no further action is required.
ii Equal to or greater than 55% but lower than 57%, then follow the steps 1 through 3
under Ng speed is equal to or above 55%
and below 57% in the Accomplishment Instructions, paragraph 2.1.2, Ground check results evaluation, of the ASB.
iii Below 55%, then follow steps 1 and 2 under Ng speed is below 55% in the Accomplishment Instructions, paragraph 2.1.2, Ground check results evaluation, of the ASB.
Note 1 to paragraph g2: In the Accomplishment Instructions, paragraph 2.1.2, of the ASB, where the ASB states Do steps 1 thru 8 after the FCU adjustment, do steps 1 through 7 of the Accomplishment Instructions, paragraph 2.1.1, in the ASB.
3 During the next engine overhaul, or within 44 months, whichever occurs first after the effective date of this AD, remove the FCU, P/N LUN 6590.078, and replace it with a part eligible for installation.
h Installation Prohibition After the effective date of this AD, do not install an FCU, P/N LUN 6590.078, onto any engine.
i Definition For the purpose of this AD, a part eligible for installation is an FCU, P/N LUN 6590.71
8.
j Terminating Action Installing a part eligible for installation onto an engine as required by paragraph g2 or 3 of this AD, as applicable, constitutes terminating action for the functional inspections required by paragraph g1 of this AD for that engine.

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