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Federal Register / Vol. 86, No. 56 / Thursday, March 25, 2021 / Rules and Regulations
15789

ESTIMATED COSTSContinued Action
Labor cost
Parts cost
Cost per product
Fabricate and install a placard
.5 work-hour $85 per hour =
$42.50.
1 work-hour $85 per hour =
$85.

Negligible

$42.50 per primary flight display.
$85 per primary flight display.

FDSA6500 software upgrade
Not applicable
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.

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.

Authority for This Rulemaking
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

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 The FAA has determined that 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
VerDate Sep<11>2014

19:11 Mar 24, 2021

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List of Subjects in 14 CFR Part 39

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.

Cost on U.S.
operators Up to $39,610.
Up to $79,220.

02341H0003, 81002342H0001, 810
02342C0001, 81002342C0002, and 810
02344B0001. These applications are installed on, but not limited to, Bombardier Inc. Model CL6002B16 604 variant airplanes and Textron Aviation Inc. Models 525B, B200, B200C, B200CGT, B200GT, B300, B300C, and C90GTi airplanes, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 3400, NAVIGATION SYSTEM.
e Unsafe Condition This AD was prompted by a conflict between the traffic collision avoidance system TCAS primary display indications and aural alerts during a resolution advisory RA scenario. The FAA is issuing this AD to prevent conflicting TCAS information, which could result in the pilot under-correcting or over-correcting and may lead to inadequate aircraft separation and a mid-air collision.
f Compliance
39.13

Amended
2. The FAA amends 39.13 by:
a. Removing Airworthiness Directive 20191209, Amendment 3919664 84
FR 32260, July 8, 2019; and b. Adding the following new airworthiness directive:

20210517 Rockwell Collins, Inc.:
Amendment 3921460; Docket No.
FAA20200883; Project Identifier 2019CE034AD.
a Effective Date This airworthiness directive AD is effective April 29, 2021.
b Affected ADs This AD replaces AD 20191209, Amendment 3919664 84 FR 32260, July 8, 2019 AD 20191209.
c Applicability This AD applies to Rockwell Collins, Inc., Rockwell Collins Flight Display System Application FDSA6500 part numbers P/Ns 81002341H0001, 81002341H0002, 810

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Comply with this AD within the compliance times specified, unless already done.
g Actions 1 Within 30 days after July 23, 2019 the effective date of AD 20191209, do the following:
i Revise the airplane flight manual AFM
or AFM supplement AFMS by adding the following text to the Limitations section: For TCAS II installations, during flight, do not operate TCAS in the TA/RA mode; TCAS
may only be operated in TA Only mode.
ii Fabricate a placard for each aircraft primary flight display, using at least 18 inch letters, with the following text: TCAS Flight OpsTA Only mode TA/RA mode prohibited.
iii Install the placard on the bottom of each aircraft primary flight display bezel in the area depicted in figure 1 to paragraph g1iii of this AD.
Note 1 to paragraph g1: In TA/RA
mode, the TA stands for traffic advisory and RA stands for resolution advisory.

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