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Federal Register / Vol. 86, No. 213 / Monday, November 8, 2021 / Rules and Regulations
Conclusion The FAA reviewed the relevant data, considered any comments received, 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. Except for minor editorial changes, and any other changes described previously, this AD is adopted as proposed in the NPRM.
None of the changes will increase the economic burden on any operator.
Related Service Information Under 1
CFR Part 51
The FAA reviewed RRD Alert NonModification Service Bulletin SB

BR70072A900584, Revision 2, dated November 22, 2017. The NMSB
describes procedures for amending flight cycle counting requirements for affected LLPs on RRD BR700710A220
model turbofan engines. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in ADDRESSES.
Other Related Service Information
procedures for the implementation of the Global Vision Flight Deck Version 5
V5 software load on Bombardier Inc.
Model BD7001A11 and BD700
1A10 airplanes, respectively.
Costs of Compliance The FAA estimates that this AD
affects 284 engines installed on airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:

The FAA reviewed Bombardier SB
700345021, Revision 04, dated February 11, 2021, and Bombardier SB
700346021, Revision 04, dated February 11, 2021. These SBs describe
ESTIMATED COSTS
Action
Labor cost
Recalculate service life for affected LLPs

20 work-hours $85 per hour = $85

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.

lotter on DSK11XQN23PROD with RULES1

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, 2 Will not affect intrastate aviation in Alaska, and
VerDate Sep<11>2014

16:24 Nov 05, 2021

Jkt 256001

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.
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:

20212112 Rolls-Royce Deutschland Ltd &
Co KG Type Certificate previously held by Rolls-Royce Deutschland GmbH, formerly BMW Rolls-Royce GmbH:
Amendment 3921772; Docket No.
FAA20210257; Project Identifier MCAI202000712E.
a Effective Date This airworthiness directive AD is effective December 13, 2021.
b Affected ADs None.

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Fmt 4700

$0

$1,700

Cost on U.S.
operators $482,800

c Applicability This AD applies to Rolls-Royce Deutschland Ltd & Co KG Type Certificate previously held by Rolls-Royce Deutschland GmbH, formerly BMW Rolls-Royce GmbH
RRD BR700710A220 model turbofan engines:
1 Installed and operated on a Bombardier Model BD7001A10 and BD7001A11
airplane, with serial number 9381, 9386, 9401, or 9432 to 9786, inclusive, that have not incorporated Bombardier Service Bulletin SB 700345021, Revision 04, dated February 11, 2021, or earlier revision, or Bombardier SB 700346021, Revision 04, dated February 11, 2021, or earlier revision, as applicable, referred to after this as a premod airplane, or 2 Installed and operated on a pre-mod airplane at any time after January 1, 2017.
d Subject Joint Aircraft System Component JASC
Code 7230, Turbine Engine Compressor Section.
e Unsafe Condition

PO 00000

Cost per product
Parts cost
Sfmt 4700

This AD was prompted by flight data obtained from airplanes equipped with certain Rockwell Collins avionics and autothrottle systems which demonstrated significant oscillation of the engine rotor revolution speed during flight. The FAA is issuing this AD to prevent failure of an affected life-limited part LLP. The unsafe condition, if not addressed, could result in uncontained release of high-energy debris, damage to the engine, and damage to the airplane.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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