Document ID: FAA-2021-0725-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Bombardier, Inc., Airplanes
Posted Date: 2021-09-08T04:00Z

[Federal Register Volume 86, Number 171 (Wednesday, September 8, 2021)]
[Proposed Rules]
[Pages 50291-50295]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-19237]

-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0725; Project Identifier MCAI-2020-01402-T]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

-----------------------------------------------------------------------

SUMMARY: The FAA proposes to supersede Airworthiness Directive (AD) 
2017-22-06, which applies to certain Bombardier, Inc., Model CL-600-
2B16 (601-3A, 601-3R, and 604 Variants) airplanes. AD 2017-22-06 
requires repetitive inspections for fuel leakage at the engine and 
auxiliary power unit (APU) fuel pumps, and related investigative and 
corrective actions if necessary. Since the FAA issued AD 2017-22-06, 
terminating actions have been developed and additional airplanes have 
been determined to be affected by the unsafe condition. This proposed 
AD would retain the requirements of AD 2017-22-06, and require an 
inspection of the APU, repair if necessary, and modification of the 
engine electrical fuel pump (EFP) installation. This proposed AD would 
also add airplanes to the applicability. The FAA is proposing this AD 
to address the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by October 25, 
2021.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.

[[Page 50292]]

     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact 
Bombardier, Inc., 200 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec 
H4S 2A3, Canada; North America toll-free telephone 1-866-538-1247 or 
direct-dial telephone 1-514-855-2999; email ac.yul@aero.bombardier.com; 
internet https://www.bombardier.com. You may view this service 
information at the FAA, Airworthiness Products Section, Operational 
Safety Branch, 2200 South 216th St., Des Moines, WA. For information on 
the availability of this material at the FAA, call 206-231-3195.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0725; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this NPRM, any comments received, and other information. The street 
address for Docket Operations is listed above.

FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aerospace 
Engineer, Avionics and Electrical Systems Section, FAA, New York ACO 
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 
516-228-7367; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.

SUPPLEMENTARY INFORMATION:

Comments Invited

    The FAA invites you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under ADDRESSES. Include ``Docket No. FAA-2021-0725; Project Identifier 
MCAI-2020-01402-T'' at the beginning of your comments. The most helpful 
comments reference a specific portion of the proposal, explain the 
reason for any recommended change, and include supporting data. The FAA 
will consider all comments received by the closing date and may amend 
the proposal because of those comments.
    Except for Confidential Business Information (CBI) as described in 
the following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
https://www.regulations.gov, including any personal information you 
provide. The agency will also post a report summarizing each 
substantive verbal contact received about this proposed AD.

Confidential Business Information

    CBI is commercial or financial information that is both customarily 
and actually treated as private by its owner. Under the Freedom of 
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public 
disclosure. If your comments responsive to this NPRM contain commercial 
or financial information that is customarily treated as private, that 
you actually treat as private, and that is relevant or responsive to 
this NPRM, it is important that you clearly designate the submitted 
comments as CBI. Please mark each page of your submission containing 
CBI as ``PROPIN.'' The FAA will treat such marked submissions as 
confidential under the FOIA, and they will not be placed in the public 
docket of this NPRM. Submissions containing CBI should be sent to 
Steven Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7367; fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov. Any commentary that the FAA receives which is 
not specifically designated as CBI will be placed in the public docket 
for this rulemaking.

Background

    The FAA issued AD 2017-22-06, Amendment 39-19086 (82 FR 49498, 
October 26, 2017) (AD 2017-22-06), for certain Bombardier, Inc., Model 
CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. AD 2017-22-06 
requires repetitive inspections for fuel leakage at the engine and APU 
fuel pumps, and related investigative and corrective actions if 
necessary. AD 2017-22-06 resulted from reports of fuel leaks in the 
engine and APU EFP cartridge/canister electrical connectors and 
conduits. The FAA issued AD 2017-22-06 to address fuel leaks in certain 
fuel pumps to remove a potential fuel ignition hazard. FAA AD 2017-22-
06 corresponds to AD CF-2016-32R1, dated October 12, 2016, issued by 
Transport Canada Civil Aviation (TCCA), which is the aviation authority 
for Canada.

Actions Since AD 2017-22-06 Was Issued

    The preamble to AD 2017-22-06 explains that the FAA considered the 
requirements ``interim action'' and was considering further rulemaking. 
The FAA has now determined that further rulemaking is indeed necessary, 
and this proposed AD follows from that determination.
    Since the FAA issued AD 2017-22-06, a general visual inspection of 
the APU and a modification of the engine EFP installation have been 
developed to address the root cause of the fuel leaks and provide 
terminating action for the repetitive general visual inspections and 
rectifications of fuel leaks from the engine and APU EFP electrical 
wiring conduit outlets. In addition, it was determined that additional 
airplanes are affected by the unsafe condition.
    TCCA has issued TCCA AD CF-2016-32R4, dated October 13, 2020 (TCCA 
AD CF-2016-32R4); and TCCA AD CF-2020-38, dated October 13, 2020 (TCCA 
AD CF-2020-38); to correct an unsafe condition for certain Bombardier, 
Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. 
This proposed AD refers to the TCCA ADs as the Mandatory Continuing 
Airworthiness Information, or the MCAI. You may examine the MCAI in the 
AD docket on the internet at https://www.regulations.gov by searching 
for and locating Docket No. FAA-2021-0725.
    This proposed AD was prompted by reports of fuel leaks from the 
electrical connectors and conduits of the engine and APU EFP cartridge/
canister, and additional actions have been developed to address the 
root cause of the fuel leaks. The FAA is proposing this AD to address 
the potential for a fire hazard as a result of fuel leak from the APU 
EFP electrical conduit in the hot landing light compartment. See the 
TCCA ADs for additional background information.

Related Service Information Under 1 CFR Part 51

    Bombardier has issued the following service information, which 
describes procedures for repetitive general visual inspections and 
rectifications for any fuel leak from the engine and APU EFP electrical 
wiring conduit outlets. These documents are distinct since they apply 
to different airplane serial numbers.
     Bombardier Service Bulletin 604-28-022, Revision 3, dated 
August 31, 2018.
     Bombardier Service Bulletin 605-28-010, Revision 3, dated 
August 31, 2018.
     Bombardier Service Bulletin 650-28-001, Revision 3, dated 
January 3, 2019.
    Bombardier has also issued the following service information, which 
describes procedures for a detailed visual inspection of the APU for 
any damage or deformations (e.g., cut wires and a broken harness 
assembly of the fuel boost pump connector), modifying

[[Page 50293]]

the engine EFP installation, and repair if necessary. These documents 
are distinct since they apply to different airplane serial numbers.
     Bombardier Service Bulletin 604-28-024, dated June 16, 
2020.
     Bombardier Service Bulletin 650-28-002, dated June 16, 
2020.
     Bombardier Service Bulletin 605-28-012, dated June 16, 
2020.
    This proposed AD would also require Bombardier Service Bulletin 
604-28-022, dated October 19, 2015, and Bombardier Service Bulletin 
605-28-010, dated October 19, 2015, which the Director of the Federal 
Register approved for incorporation by reference as of November 30, 
2017 (82 FR 49498, October 26, 2017).
    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 the ADDRESSES section.

FAA's Determination

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to the FAA's bilateral agreement with the State of Design Authority, 
the FAA has been notified of the unsafe condition described in the MCAI 
and service information referenced above. The FAA is proposing this AD 
because the FAA evaluated all the relevant information and determined 
the unsafe condition described previously is likely to exist or develop 
on other products of the same type design.

Proposed Requirements of This NPRM

    This proposed AD would retain all of the requirements of AD 2017-
22-06 and require accomplishing the actions specified in the service 
information described previously, except as discussed under 
``Difference Between this Proposed AD and the MCAI.

Difference Between This Proposed AD and the MCAI

    Paragraph E.1. of TCCA AD CF-2016-32R4, for airplane serial numbers 
6125 through 6163, requires inspecting for fuel leaks within 600 hours 
or 12 months, whichever occurs first after ``the date of aeroplane 
entry in-service.'' Paragraph (i) of this proposed AD, however, would 
require compliance for those airplanes within 600 flight hours or 12 
months, whichever occurs first after ``the effective date of this [FAA] 
AD.'' Paragraph D.1. of TCCA AD CF-2016-32R4 requires compliance for 
this action for other serial numbers within 600 flight hours or 12 
months after the effective date of the AD. The FAA has determined that 
the risk is not higher for serial numbers 6125 through 6163 compared 
with the other identified airplanes required to accomplish the same 
inspection. Therefore, for this AD, the compliance time is the same for 
all airplanes that are required to inspect for fuel leaks.

Costs of Compliance

    The FAA estimates that this proposed AD affects 128 airplanes of 
U.S. registry.
    The FAA estimates the following costs to comply with this proposed 
AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                 Cost on U.S.
              Action                    Labor cost        Parts cost      Cost per product        operators
----------------------------------------------------------------------------------------------------------------
Retained actions from AD           1 work-hour x $85                $0  $85 per inspection   $10,285 per
 2017[dash]22[dash]06 (for 121      per hour = $85.                      cycle.               inspection cycle.
 airplanes).
New proposed actions.............  20 work-hours x $85           1,768  $3,468.............  $443,904.
                                    per hour = $1,700.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary repair 
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 this repair:

                 Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
                                                             Cost per
              Labor cost                   Parts cost        product
------------------------------------------------------------------------
5 work-hours x $85 per hour = $425....          $8,618           $9,043
------------------------------------------------------------------------

    According to the manufacturer, some or all of the costs of this 
proposed AD may be covered under warranty, thereby reducing the cost 
impact on affected operators. The FAA does not control warranty 
coverage for affected operators. As a result, the FAA has included all 
known costs in the cost estimate.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's 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 Agency's 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 proposed AD would not have 
federalism implications under Executive Order 13132. This proposed AD 
would 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 proposed 
regulation:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Would not affect intrastate aviation in Alaska, and
    (3) Would not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

[[Page 50294]]

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

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

Sec.  39.13   [Amended]

0
2. The FAA amends Sec.  39.13 by:
0
a. Removing Airworthiness Directive (AD) 2017-22-06, Amendment 39-19086 
(82 FR 49498, October 26, 2017), and
0
b. Adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2021-0725; Project Identifier MCAI-
2020-01402-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by October 25, 2021.

(b) Affected ADs

    This AD replaces AD 2017-22-06, Amendment 39-19086 (82 FR 49498, 
October 26, 2017) (AD 2017-22-06).

(c) Applicability

    This AD applies to Bombardier, Inc., Model CL-600-2B16 (601-3A, 
601-3R, and 604 Variants) airplanes, certificated in any category, 
serial numbers 5301 through 5665 inclusive, 5701 through 5990 
inclusive, and 6050 through 6163 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel.

(e) Reason

    This AD was prompted by reports of fuel leaks from the 
electrical connectors and conduits of the engine and auxiliary power 
unit (APU) electrical fuel pump (EFP) cartridge/canister, and 
additional actions have been developed to address the root cause of 
the fuel leaks. The FAA is issuing this AD to address the potential 
for a fire hazard as a result of fuel leak from the APU EFP 
electrical conduit in the hot landing light compartment.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Retained Actions for Certain Airplanes, With Revised Service 
Information and Method of Compliance Provisions

    This paragraph restates the requirements of paragraph (g) of AD 
2017-22-06, with revised service information and method of 
compliance provisions. For Model CL-600-2B16 airplanes having serial 
numbers 5301 through 5665 inclusive: Within 600 flight hours or 12 
months, whichever occurs first after November 30, 2017 (the 
effective date of AD 2017-22-06), do the inspections specified in 
paragraphs (g)(1) through (3) of this AD, and do all applicable 
corrective actions, in accordance with the Accomplishment 
Instructions of Bombardier Service Bulletin 604-28-022, dated 
October 19, 2015, or Bombardier Service Bulletin 604-28-022, 
Revision 3, dated August 31, 2018. Do all applicable corrective 
actions before further flight. Repeat the inspections at intervals 
not to exceed 600 flight hours or 12 months, whichever occurs first. 
As the effective date of this AD, use Bombardier Service Bulletin 
604-28-022, Revision 3, dated August 31, 2018, only.
    (1) Do a general visual inspection for traces of fuel coming 
from the right-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (2) Do a general visual inspection for traces of fuel coming 
from the left-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (3) Do a general visual inspection for traces of fuel coming 
from the EFP electrical wiring conduit outlet at the lower body 
fairing area for engine EFPs and at the right-hand landing light 
compartment for the APU EFP.

(h) Retained Actions for Certain Other Airplanes, With Revised Service 
Information and Compliance Method Provisions

    This paragraph restates the requirements of paragraph (h) of AD 
2017-22-06, with revised service information and compliance method 
provisions. For Model CL-600-2B16 airplanes having serial numbers 
5701 through 5955 inclusive, 5957, 5960 through 5966 inclusive, 5968 
through 5971 inclusive, and 5981: Within 600 flight hours or 12 
months, whichever occurs first after November 30, 2017 (the 
effective date of AD 2017-22-06), do the inspections specified in 
paragraphs (h)(1) through (3) of this AD, and do all applicable 
related investigative and corrective actions, in accordance with the 
Accomplishment Instructions in Bombardier Service Bulletin 605-28-
010, dated October 19, 2015, or Bombardier Service Bulletin 605-28-
010, Revision 3, dated August 31, 2018. Do all applicable related 
investigative and corrective actions before further flight. Repeat 
the inspections at intervals not to exceed 600 flight hours or 12 
months, whichever occurs first. As of the effective date of this AD, 
use Bombardier Service Bulletin 605-28-010, Revision 3, dated August 
31, 2018, only.
    (1) Do a general visual inspection for traces of fuel coming 
from the right-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (2) Do a general visual inspection for traces of fuel coming 
from the left-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (3) Do a general visual inspection of the right-hand landing 
light compartment for traces of fuel coming from the APU EFP.

(i) New Requirements of This AD: Inspections and Rectifications

    For the airplanes identified in figure 1 to paragraph (i) of 
this AD: At the applicable compliance time specified in figure 1 to 
paragraph (i) of this AD, do a general visual inspection for any 
fuel leak from the engine and APU EFP electrical wiring conduit 
outlets, in accordance with the Accomplishment Instructions of the 
applicable service information specified in figure 1 to paragraph 
(i) of this AD. If any fuel leak is found during the general visual 
inspection, before further flight, correct the fuel leak in 
accordance with the Accomplishment Instructions of the applicable 
service information specified in figure 1 to paragraph (i) of this 
AD. Thereafter, repeat the general visual inspection at intervals 
not to exceed 600 flight hours or 12 months, whichever occurs first.

   Figure 1 to Paragraph (i)--Compliance Times and Service Information
------------------------------------------------------------------------
                                                      Bombardier service
          Serial Nos.--            Compliance time--      bulletin--
------------------------------------------------------------------------
5956, 5958, 5959, 5967, 5972      Within 600 flight   Bombardier Service
 through 5980 inclusive, and       hours or 12         Bulletin 605-28-
 5982 through 5990 inclusive.      months, whichever   010, Revision 3,
                                   occurs first        dated August 31,
                                   after the           2018.
                                   effective date of
                                   this AD.
6050 through 6163 inclusive.....  Within 600 flight   Bombardier Service
                                   hours or 12         Bulletin 650-28-
                                   months, whichever   001, Revision 3,
                                   occurs first        dated January 3,
                                   after the           2019.
                                   effective date of
                                   this AD.
------------------------------------------------------------------------

(j) New Requirements of This AD: Inspection and Modification

    Within 60 months after the effective date of this AD: Do a 
detailed visual inspection of the APU for any damage or 
deformations, and modify the engine EFP installation, in accordance 
with the Accomplishment Instructions of the applicable service 
information specified in figure 2 to paragraph (j) of this AD. If 
any damage or deformations are found during the detailed visual 
inspection, before further flight, do the repair

[[Page 50295]]

in accordance with the Accomplishment Instructions of the applicable 
service information specified in figure 2 to paragraph (j) of this 
AD.

             Figure 2 to Paragraph (j)--Service Information
------------------------------------------------------------------------
             Serial Nos.--                Bombardier service bulletin--
------------------------------------------------------------------------
5301 through 5665 inclusive............  Bombardier Service Bulletin 604-
                                          28-024, dated June 16, 2020.
5701 through 5990 inclusive............  Bombardier Service Bulletin 605-
                                          28-012, dated June 16, 2020.
6050 through 6163 inclusive............  Bombardier Service Bulletin 650-
                                          28-002, dated June 16, 2020.
------------------------------------------------------------------------

(k) No Reporting Requirement

    Where service information identified in this AD specifies to 
submit certain information to the manufacturer, this AD does not 
include that requirement.

(l) Terminating Actions

    Accomplishing the actions required by paragraph (j) of this AD 
terminates all requirements of this AD.

(m) Credit for Previous Actions

    (1) 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 Bombardier Service Bulletin 604-28-
022, dated October 19, 2015, provided that within 4 months or 150 
flight hours from the effective date of this AD or within 1 year 
from the last inspection, whichever occurs first, the actions 
accomplished in paragraph (g) are done using Bombardier Service 
Bulletin 604-28-022, Revision 3, dated August 31, 2018.
    (2) This paragraph provides credit for actions required by 
paragraph (h) of this AD, if those actions were performed before the 
effective date of this AD using Bombardier Service Bulletin 605-28-
010, dated October 19, 2015, provided that within 4 months or 150 
flight hours from the effective date of this AD or within 1 year 
from the last inspection, whichever occurs first, the actions 
accomplished in paragraph (h) of this AD are done using Bombardier 
Service Bulletin 605-28-010, Revision 3, dated August 31, 2018.
    (3) This paragraph provides credit for actions required by 
paragraph (i) of this AD, if those actions were performed before the 
effective date of this AD using the service information in 
paragraphs (l)(3)(i) through (iii) of this AD, provided that within 
1 year from the last inspection, the actions accomplished in 
paragraph (i) of this AD are done using Bombardier Service Bulletin 
650-28-001, Revision 3, dated January 3, 2019. This service 
information is not incorporated by reference in this AD.
    (i) Bombardier Service Bulletin 650-28-001, dated November 3, 
2017.
    (ii) Bombardier Service Bulletin 650-28-001, Revision 1, dated 
May 14, 2018.
    (iii) Bombardier Service Bulletin 650-28-001, Revision 2, dated 
August 31, 2018.

(n) Other FAA AD Provisions

    (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 516-228-7300; fax 516-794-5531. Before 
using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
responsible Flight Standards Office.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or 
Bombardier, Inc.'s TCCA Design Approval Organization (DAO). If 
approved by the DAO, the approval must include the DAO-authorized 
signature.

(o) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) TCCA AD CF-2016-32R4, dated October 13, 2020; and TCCA AD CF-
2020-38, dated October 13, 2020; for related information. This MCAI 
may be found in the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-
2021-0725.
    (2) For more information about this AD, contact Steven 
Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7367; fax 516-794-5531; email 
9-avs-nyaco-cos@faa.gov.
    (3) For service information identified in this AD, contact 
Bombardier, Inc., 200 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 2A3, Canada; North America toll-free telephone 1-
866-538-1247 or direct-dial telephone 1-514-855-2999; email 
ac.yul@aero.bombardier.com; internet https://www.bombardier.com. You 
may view this service information at the FAA, Airworthiness Products 
Section, Operational Safety Branch, 2200 South 216th St., Des 
Moines, WA. For information on the availability of this material at 
the FAA, call 206-231-3195.

    Issued on September 1, 2021.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2021-19237 Filed 9-7-21; 8:45 am]
BILLING CODE 4910-13-P