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Federal Register / Vol. 86, No. 119 / Thursday, June 24, 2021 / Rules and Regulations
NPRM proposed to require modifying the MLG hydraulic transfer valve, as specified in EASA AD 20200223.
The FAA is issuing this AD to address abnormal behavior of the MLG
hydraulic transfer valve due to a restriction in hydraulic flow, which could cause the MLG hydraulic transfer valve to not function properly and fail to retract, extend, or lock the MLG, and possibly result in MLG collapse following landing and consequent damage to the airplane and injury to occupants. See the MCAI for additional background information.

comments on the NPRM or on the determination of the cost to the public.

Comments
Related Service Information Under 1
CFR Part 51
EASA AD 20200223 describes procedures for modifying the MLG

The FAA gave the public the opportunity to participate in developing this final rule. The FAA received no
Conclusion The FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed, except for minor editorial changes. The FAA has determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and Do not add any additional burden upon the public than was already proposed in the NPRM.

hydraulic transfer valve. This modification includes installing a new relay, relocation of wiring, and installation of new wiring, to ensure that, when the emergency extension handle is used, the transfer valve solenoid is energized to force the transfer valve to the gear down position. This material 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 section.
Costs of Compliance The FAA estimates that this AD
affects 8 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
20 work-hours $85 per hour = $1,700

$1,875

$3,575

$28,600

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.

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, 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.

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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 that this AD:
1 Is not a significant regulatory action under Executive Order 12866,
VerDate Sep<11>2014

16:01 Jun 23, 2021

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39.13

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

20210911 Saab AB, Support and Services Formerly Known as Saab AB, Saab Aeronautics: Amendment 3921525;
Docket No. FAA20210023; Project Identifier MCAI202001407T.
a Effective Date This airworthiness directive AD is effective July 29, 2021.

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b Affected ADs None.
c Applicability This AD applies to all Saab AB, Support and Services Model SAAB 2000 airplanes, certificated in any category.
d Subject Air Transport Association ATA of America Code 32, Landing gear.
e Reason This AD was prompted by a report indicating that the left-hand main landing gear MLG collapsed after touchdown, causing severe damage to the airplane. The FAA is issuing this AD to address abnormal behavior of the MLG hydraulic transfer valve due to a restriction in hydraulic flow, which could cause the MLG hydraulic transfer valve to not function properly and fail to retract, extend, or lock the MLG, and possibly result in MLG collapse following landing and consequent damage to the airplane and injury to occupants.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Requirements Except as specified in paragraph h of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency EASA AD 20200223, dated October 14, 2020 EASA AD 20200223.
h Exceptions to EASA AD 20200223
1 Where EASA AD 20200223 refers to its effective date, this AD requires using the effective date of this AD.

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