Rule2024-21806
Airworthiness Directives; Bombardier, Inc., Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
September 24, 2024
Effective
October 29, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by the discovery of a single-point failure within the left- hand and right-hand heater current monitor (HCM) units. This AD requires installing a monitor circuit comprising relays external to the HCM units. This AD also requires revising the normal and non-normal procedure sections of the existing airplane flight manual (AFM) to add new procedures associated with revised crew alerting system (CAS) messages. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 185 (Tuesday, September 24, 2024)</title>
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[Federal Register Volume 89, Number 185 (Tuesday, September 24, 2024)]
[Rules and Regulations]
[Pages 77769-77772]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-21806]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-0758; Project Identifier MCAI-2023-00671-T;
Amendment 39-22819; AD 2024-16-13]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc., Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was
prompted by the discovery of a single-point failure within the left-
hand and right-hand heater current monitor (HCM) units. This AD
requires installing a monitor circuit comprising relays external to the
HCM units. This AD also requires revising the normal and non-normal
procedure sections of the existing airplane flight manual (AFM) to add
new procedures associated with revised crew alerting system (CAS)
messages. The FAA is issuing this AD to address the unsafe condition on
these products.
DATES: This AD is effective October 29, 2024.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of October 29,
2024.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-0758; 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 final rule, the mandatory
[[Page 77770]]
continuing airworthiness information (MCAI), any comments received, and
other information. The address for Docket Operations is U.S. Department
of Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
<bullet> For Bombardier material identified in this AD, contact
Bombardier Business Aircraft Customer Response Center, 400 C[ocirc]te-
Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; telephone 514-
855-2999; email: <a href="/cdn-cgi/l/email-protection#08696b26717d6448696d7a6726346928607a6d6e35" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website: <a href="http://bombardier.com">bombardier.com</a>.
<bullet> You may view this material 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. It is also available at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-0758.
FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#ffc6d29e898cd291869e9c90d29c908cbf999e9ed1989089"><span class="__cf_email__" data-cfemail="81b8ace0f7f2aceff8e0e2eeace2eef2c1e7e0e0afe6eef7">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain Bombardier,
Inc., Model BD-100-1A10 airplanes. The NPRM published in the Federal
Register on March 25, 2024 (89 FR 20562). The NPRM was prompted by AD
CF-2023-33, dated May 10, 2023 (referred to after this as the MCAI),
issued by Transport Canada, which is the aviation authority for Canada.
The MCAI states that during a review of the air data system, Bombardier
discovered that a single-point failure exists within the left-hand and
right hand HCM units. The HCM unit is designed with a single
programmable logic device (PLD), which is responsible for the control
and monitoring functions of the HCM unit. The PLD could fail in a way
that it would erroneously energize the heater control relay and switch
the heaters off. This failure could lead to un-annunciated loss of ice
protection on the air data probes, resulting in the potential display
of misleading airspeed, and erroneous indications to the flightcrew.
In the NPRM, the FAA proposed to require installing a monitor
circuit comprising relays external to the HCM units. The NPRM also
required revising the normal and non-normal procedure sections of the
existing AFM to add new procedures associated with revised CAS
messages. The FAA is issuing this AD to address the unsafe condition on
these products.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2024-0758.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from NetJets Inc. The following presents
the comment received on the NPRM and the FAA's response to the comment.
Request to Reference Previous AFM Revision
NetJets requested that the NPRM be revised to change references to
Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38,
dated May 11, 2023 (Revision 38), to Revision 36, dated September 27,
2022 (Revision 36), which is referenced in the MCAI for Challenger 350
airplanes. NetJets pointed out that the particular procedures affected
by the proposed AD were amended in Revision 36. Further, NetJets stated
that Revision 38 is out-of-date and speculated that chances are good
that, if the FAA changes to Revision 39, dated September 25, 2023
(Revision 39), Bombardier will issue a new revision before the final AD
is released. NetJets went on to assert that this will cause an
increased workload for the FAA, Bombardier, and operators due to the
increase in necessary requests for approvals of alternative methods of
compliance (AMOCs) to use later revisions of the AFM.
The FAA does not agree to revise this AD to change the AFM revision
but provides the following clarification: Paragraphs (h)(3) and (4)
specify to revise Chapter 4, Normal Procedures, to include the
information in BEFORE STARTING ENGINES section, Subsection 04-02, and
in Chapter 5, Non-Normal Procedures, to include the information in
Subsection 05-27, Ice & Rain Protection, respectively, of the
Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38,
dated May 11, 2023 (for the applicable airplanes). The language in
paragraph (h) of this AD is designed to allow incorporating the
information in the referenced sections, regardless of the revision
level of the AFM, so long as the language is identical to the
information in BEFORE STARTING ENGINES section, Subsection 04-02,
Chapter 4, Normal Procedures, and Subsection 05-27, Ice & Rain
Protection, Chapter 5, Non-Normal Procedures, of the Bombardier
Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38, dated May
11, 2023. The information in BEFORE STARTING ENGINES section,
Subsection 04-02, Chapter 4, Normal Procedures, and Subsection 05-27,
Ice & Rain Protection, Chapter 5, Non-Normal Procedures, of the
Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, Revision 38
is identical to that in Revision 36. Therefore, this AD has not been
changed regarding this request.
Conclusion
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 this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI
referenced above. The FAA reviewed the relevant data, considered the
comment 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 this product. Except for minor editorial changes,
this AD is adopted as proposed in the NPRM. None of the changes will
increase the economic burden on any operator.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed Bombardier Service Bulletin 100-30-06 and
Bombardier Service Bulletin 350-30-001, both dated December 29, 2022.
This material specifies procedures to install a monitoring circuit
comprising relays external to the HCM units, including reworking the
plate assembly, installing relay bracket assemblies, installing relays
and a rail terminal module, installing wires for the relays, and
performing operational testing. These documents are distinct since they
apply to different airplane serial numbers.
The FAA also reviewed the following material, which specifies new
normal procedures to follow after installation of the monitoring
circuit. These documents are distinct since they apply to different
airplane serial numbers.
<bullet> BEFORE STARTING ENGINES section, Subsection 04-02, Chapter
4, Normal Procedures, Bombardier Challenger 300 AFM (Imperial Version),
Publication No. CSP 100-1, Revision 72, dated May 11, 2023. (For
obtaining the procedures for Bombardier Challenger 300 AFM (Imperial
Version), Publication No. CSP 100-1, use Document Identification No. CH
300 AFM-I.)
[[Page 77771]]
<bullet> BEFORE STARTING ENGINES section, Subsection 04-02, Chapter
4, Normal Procedures, Bombardier Challenger 350 AFM, Publication No. CH
350 AFM, Revision 38, dated May 11, 2023. (For obtaining the procedures
for Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use
Document Identification No. CH 350 AFM.)
The FAA reviewed the following material, which specifies non-normal
procedures to follow after installation of the monitoring circuit.
These documents are distinct since they apply to different airplane
serial numbers.
<bullet> Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-
Normal Procedures, Bombardier Challenger 300 AFM (Imperial Version),
Publication No. CSP 100-1, Revision 72, dated May 11, 2023. (For
obtaining the procedures for Bombardier Challenger 300 AFM (Imperial
Version), Publication No. CSP 100-1, use Document Identification No. CH
300 AFM-I.)
<bullet> Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-
Normal Procedures, Bombardier Challenger 350 AFM, Publication No. CH
350 AFM, Revision 38, dated May 11, 2023. (For obtaining the procedures
for Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use
Document Identification No. CH 350 AFM.)
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 343 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
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Up to 70 work-hours x $85 per hour = Up to $2,324........... Up to $8,274........... Up to $2,837,982
Up to $5,950.
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all the costs of this
AD may be covered under warranty, thereby reducing the cost impact on
affected operators.
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
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.
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 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 adding the following new airworthiness
directive:
2024-16-13 Bombardier, Inc.: Amendment 39-22819; Docket No. FAA-
2024-0758; Project Identifier MCAI-2023-00671-T.
(a) Effective Date
This airworthiness directive (AD) is effective October 29, 2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category, serial numbers 20003
through 20936 inclusive.
(d) Subject
Air Transport Association (ATA) of America Code 30, Ice and Rain
Protection.
(e) Unsafe Condition
This AD was prompted by a review of the air data system where
Bombardier discovered that a single-point failure exists within the
left-hand and right-hand heater current monitor (HCM) units. The FAA
is issuing this AD to address the failure of the programmable logic
device in the left-hand and right-hand HCM units. The unsafe
condition, if not addressed, could lead to un-annunciated loss of
ice protection on the air data probes, resulting in the potential
display of misleading airspeed, and erroneous indications to the
flightcrew.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Monitoring Circuit Installation and Tests
Within 60 months from the effective date of this AD, install a
monitoring circuit comprising of relays external to the HCM units,
in accordance with sections 2.B. and 2.C. of the Accomplishment
Instructions of the applicable material specified in paragraph
(g)(1) or (2) of this AD.
(1) Bombardier Service Bulletin 100-30-06, dated December 29,
2022 (for airplane serial numbers 20003 through 20500 inclusive).
(2) Bombardier Service Bulletin 350-30-001, dated December 29,
2022 (for airplane serial numbers 20501 through 20936 inclusive).
(h) Revision of Existing Airplane Flight Manual (AFM)
Within 60 months from the effective date of this AD, and after
the completion of the actions required by paragraph (g) of this AD,
revise the existing AFM as specified in
[[Page 77772]]
paragraphs (h)(1) through (4) of this AD, as applicable.
(1) For airplane serial numbers 20003 through 20500 inclusive:
Revise Chapter 4, Normal Procedures, to include the information in
BEFORE STARTING ENGINES section, Subsection 04-02, Chapter 4, Normal
Procedures, Bombardier Challenger 300 AFM (Imperial Version),
Publication No. CSP 100-1, Revision 72, dated May 11, 2023.
Note 1 to paragraph (h)(1): For obtaining the procedures
specified in paragraphs (h)(1) and (2) of this AD for Bombardier
Challenger 300 AFM (Imperial Version), Publication No. CSP 100-1,
use Document Identification No. CH 300 AFM-I.
(2) For airplane serial numbers 20003 through 20500 inclusive:
Revise Chapter 5, Non-Normal Procedures, to include the information
in Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-Normal
Procedures, Bombardier Challenger 300 AFM (Imperial Version),
Publication No. CSP 100-1, Revision 72, dated May 11, 2023.
(3) For airplane serial numbers 20501 through 20936 inclusive:
Revise Chapter 4, Normal Procedures, to include the information in
BEFORE STARTING ENGINES section, Subsection 04-02, Chapter 4, Normal
Procedures, Bombardier Challenger 350 AFM, Publication No. CH 350
AFM, Revision 38, dated May 11, 2023.
Note 2 to paragraph (h)(3): For obtaining the procedures
specified in paragraphs (h)(3) and (4) of this AD for Bombardier
Challenger 350 AFM, Publication No. CH 350 AFM, use Document
Identification No. CH 350 AFM.
(4) For airplane serial numbers 20501 through 20936 inclusive:
Revise Chapter 5, Non-Normal Procedures, to include the information
in Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-Normal
Procedures, Bombardier Challenger 350 AFM, Publication No. CH 350
AFM, Revision 38, dated May 11, 2023.
(i) Additional AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
International Validation 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
International Validation Branch, mail it to the address identified
in paragraph (j) of this AD. Information may be emailed to: 9-AVS-
<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="07495e4644482a4448544761666629606871">[email protected]</a>. 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, International
Validation Branch, FAA; or Transport Canada; or Bombardier, Inc.'s
Transport Canada Design Approval Organization (DAO). If approved by
the DAO, the approval must include the DAO-authorized signature.
(j) Additional Information
For more information about this AD, contact Steven Dzierzynski,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#e1d8cc809792cc8f9880828ecc828e92a1878080cf868e97"><span class="__cf_email__" data-cfemail="89b0a4e8fffaa4e7f0e8eae6a4eae6fac9efe8e8a7eee6ff">[email protected]</span></a>.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the material listed in this paragraph
under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions
required by this AD, unless this AD specifies otherwise.
(i) BEFORE STARTING ENGINES section, Subsection 04-02, Chapter
4, Normal Procedures, Bombardier Challenger 300 AFM (Imperial
Version), Publication No. CSP 100-1, Revision 72, dated May 11,
2023.
Note 3 to paragraph (k)(2)(i): For obtaining the procedures
specified in paragraphs (k)(2)(i) and (ii) of this AD for Bombardier
Challenger 300 AFM (Imperial Version), Publication No. CSP 100-1,
use Document Identification No. CH 300 AFM-I.
(ii) Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-
Normal Procedures, Bombardier Challenger 300 AFM (Imperial Version),
Publication No. CSP 100-1, Revision 72, dated May 11, 2023.
(iii) BEFORE STARTING ENGINES section, Subsection 04-02, Chapter
4, Normal Procedures, Bombardier Challenger 350 AFM, Publication No.
CH 350 AFM, Revision 38, dated May 11, 2023.
Note 4 to paragraph (k)(2)(iii): For obtaining the procedures
specified in paragraphs (k)(2)(iii) and (iv) of this AD for
Bombardier Challenger 350 AFM, Publication No. CH 350 AFM, use
Document Identification No. CH 350 AFM.
(iv) Subsection 05-27, Ice & Rain Protection, Chapter 5, Non-
Normal Procedures, Bombardier Challenger 350 AFM, Publication No. CH
350 AFM, Revision 38, dated May 11, 2023.
(v) Bombardier Service Bulletin 100-30-06, dated December 29,
2022.
(vi) Bombardier Service Bulletin 350-30-001, dated December 29,
2022.
(3) For material identified in this AD, contact Bombardier
Business Aircraft Customer Response Center, 400 C[ocirc]te-Vertu
Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-
2999; email <a href="/cdn-cgi/l/email-protection#8beae8a5f2fee7cbeaeef9e4a5b7eaabe3f9eeedb6" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website <a href="http://bombardier.com">bombardier.com</a>.
(4) You may view this material 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.
(5) You may view this material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit <a href="http://www.archives.gov/federal-register/cfr/ibr-locations">www.archives.gov/federal-register/cfr/ibr-locations</a>, or email <a href="/cdn-cgi/l/email-protection#2f495d0146415c5f4a4c5b4640416f414e5d4e01484059"><span class="__cf_email__" data-cfemail="7a1c08541314090a1f190e1315143a141b081b541d150c">[email protected]</span></a>.
Issued on August 6, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-21806 Filed 9-23-24; 8:45 am]
BILLING CODE 4910-13-P
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