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Federal Register / Vol. 86, No. 228 / Wednesday, December 1, 2021 / Rules and Regulations ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
5 work-hours $85 per hour = $425

$0

$425

$22,950

The FAA estimates the following costs to do any necessary on-condition actions that would be required based on
the results of any required actions. The FAA has no way of determining the
number of aircraft that might need these on-condition actions:

ESTIMATED COSTS OF ON-CONDITION ACTIONS
Parts cost
Up to 7 work-hours $85 per hour = Up to $595

Up to $12,643

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.
Regulatory Findings
lotter on DSK11XQN23PROD with RULES1

Cost per product
Labor cost
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, 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.

VerDate Sep<11>2014

16:06 Nov 30, 2021

Jkt 256001

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.
39.13

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

20212302 De Havilland Aircraft of Canada Limited Type Certificate Previously Held by Bombardier, Inc.:
Amendment 3921800; Docket No.
FAA20210656; Project Identifier MCAI202100394T.
a Effective Date This airworthiness directive AD is effective January 5, 2022.
b Affected ADs None.
c Applicability This AD applies to De Havilland Aircraft of Canada Limited Model DHC8401 and 402 airplanes, certificated in any category, serial numbers 4001 and 4003 through 4614
inclusive.
d Subject Air Transport Association ATA of America Code 26, Fire protection.
e Unsafe Condition This AD was prompted by reports of loss of hydraulic fluid and annunciation of the check fire detect light. The FAA is issuing this AD to address insufficient separation
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Frm 00004

Fmt 4700

Sfmt 4700

Up to $13,238.

between the advanced pneumatic detector APD sensing line and surrounding components, which could lead to a hydraulic leak, loss of hydraulic systems and loss of fire detection in the main landing gear MLG
primary zone should prolonged contact occur.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Inspection and Corrective Actions Within 48 months or 8,000 flight hours, whichever occurs first after the effective date of this AD: Do a detailed visual inspection for chafing and proper clearance of the leftand right-hand MLG primary zone APD sensing lines, the hydraulic tube assemblies and the surrounding structure, and do all applicable corrective actions, in accordance with paragraph 3.B. of the Accomplishment Instructions of De Havilland Aircraft of Canada Limited Service Bulletin 842620, Revision A, dated March 9, 2021. Do all applicable corrective actions before further flight.
h Credit for Previous Actions This paragraph provides credit for actions required by paragraph g of this AD, if those actions were performed before the effective date of this AD using De Havilland Aircraft of Canada Limited Service Bulletin 8426
20, dated October 21, 2020.
i Other FAA AD Provisions The following provisions also apply to this AD:
1 Alternative Methods of Compliance AMOCs: The Manager, New York ACO
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 responsible Flight Standards Office, as appropriate. If sending information directly to the manager of the certification office, send it to ATTN: Program Manager, Continuing Operational Safety, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 5162287300; fax 5167945531. Before
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