Rule2023-12934
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
June 16, 2023
Effective
July 21, 2023
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 a report that a design deficiency was discovered which could allow a no-back pawl to be incorrectly installed in a horizontal stabilizer trim actuator (HSTA). This AD requires a check for part number and serial numbers of the HSTA, and if necessary, inspection of the no-back pawl installation, and corrective action. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 88 Issue 116 (Friday, June 16, 2023)</title>
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[Federal Register Volume 88, Number 116 (Friday, June 16, 2023)]
[Rules and Regulations]
[Pages 39341-39344]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-12934]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-0439; Project Identifier MCAI-2022-01263-T;
Amendment 39-22449; AD 2023-11-04]
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 a report that a design deficiency was discovered which
could allow a no-back pawl to be incorrectly installed in a horizontal
stabilizer trim actuator (HSTA). This AD requires a check for part
number and serial numbers of the HSTA, and if necessary, inspection of
the no-back pawl installation, and corrective action. The FAA is
issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective July 21, 2023.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of July 21,
2023.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-0439; 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 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 service information identified in this final rule,
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#177674396e627b5776726578392b76377f6572712a" 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 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. It is also available at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-0439.
FOR FURTHER INFORMATION CONTACT: Chirayu Gupta, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#586175392e2b753621393b37753b372b183e3939763f372e"><span class="__cf_email__" data-cfemail="86bfabe7f0f5abe8ffe7e5e9abe5e9f5c6e0e7e7a8e1e9f0">[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 24, 2023 (88 FR 17748). The NPRM was prompted by AD
CF-2022-55, dated September 21, 2022, issued by Transport Canada, which
is the aviation authority for Canada (referred to after this as the
MCAI). The MCAI states that during an unscheduled inspection, a design
deficiency was discovered which could allow a no-back pawl to be
[[Page 39342]]
incorrectly installed in an HSTA. The no-back mechanism is a primary
means to prevent back driving of the HSTA, and the motor brake
assemblies (MBAs) are the secondary means. If this condition is not
corrected, a non-functioning no-back mechanism in combination with loss
of, or degraded HSTA MBA braking capability, could lead to a loss of
control of the airplane. The MCAI also states that as a mitigating
action, Transport Canada AD CF-2019-23, dated June 18, 2019, was issued
to mandate a software upgrade for the horizontal stabilizer trim
electronic control unit to verify the MBA for braking capability during
the power up test on certain Bombardier, Inc., Model BD-100-1A10
airplanes. Transport Canada AD CF-2019-23 corresponds to FAA AD 2019-
15-04, Amendment 39-19697 (84 FR 38862, August 8, 2019) (AD 2019-15-
04).
In the NPRM, the FAA proposed to require a check for part number
and serial numbers of the HSTA, and if necessary, inspection of the no-
back pawl installation, and corrective action. 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-2023-0439.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from an individual who supported the
SNPRM/NPRM without change.
Additional Changes to This AD
The FAA has revised paragraph (h) of this AD to clarify the parts
installation prohibition applies only to any HSTA with P/N C47100-003
or P/N C47100-004 that does not have either the suffix-K following the
serial number or a modification plate showing ``SB C47100-27-02'' or
``SB C47100-27-03.'' In the NPRM, the FAA had inadvertently stated that
installation of an HSTA with a modification plate showing ``SB C47100-
27-02'' or ``SB C47100-27-03'' was prohibited.
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
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 this product. Except for minor editorial
change, 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 Bombardier Service Bulletins 100-27-20 and 350-27-
009, both Revision 01, both dated December 1, 2020. This service
information specifies procedures for a check for part number and serial
numbers of the HSTA, and if necessary, inspection of the no-back pawl
installation and corrective action. Corrective actions include
replacement of the HSTA, and a re-identification and test of the HSTA.
These documents are distinct since they apply to different airplane
configurations. 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.
Costs of Compliance
The FAA estimates that this AD will affect 703 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
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Labor cost Parts cost Cost per product Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Up to 2 work-hours x $85 per hour None..................... Up to $170.............. Up to $119,510.
= Up to $170.
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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
airplanes that might need these on-condition actions:
Estimated Costs of On-Condition Actions
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Labor cost Parts cost Cost per product
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Up to 25 work-hours x $85 per $2,905 Up to $5,030.
hour = Up to $2,125.
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According to the manufacturer, some or all of the costs of this 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
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
[[Page 39343]]
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:
2023-11-04 Bombardier, Inc.:
Amendment 39-22449; Docket No. FAA-2023-0439; Project Identifier
MCAI-2022-01263-T.
(a) Effective Date
This airworthiness directive (AD) is effective July 21, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category, having serial number 20003
and subsequent.
(d) Subject
Air Transport Association (ATA) of America Code 27, Flight
Controls.
(e) Unsafe Condition
This AD was prompted by a report that a design deficiency was
discovered which could allow a no-back pawl to be incorrectly
installed in a horizontal stabilizer trim actuator (HSTA). The FAA
is issuing this AD to address incorrectly installed no-back pawls.
The unsafe condition, if not addressed, could result in a non-
functioning no-back mechanism, which, in combination with loss of or
degraded HSTA motor brake assembly (MBA) braking capability, could
lead to a loss of control of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Records Check and Corrective Actions
Within 60 months after the effective date of this AD, check the
airplane maintenance records or do a visual check to determine the
part and serial numbers of the HSTA.
(1) If the part number is C47100-005: No further action is
required by this paragraph.
(2) If the part number is C47100-004 and the serial number ends
with the suffix-K: No further action is required by this paragraph.
(3) If the serial number is listed in the table referred to in
paragraph 2.B.(4) of the Accomplishment Instructions of the
applicable Bombardier service bulletin identified in figure 1 to
paragraph (g)(3) of this AD: Within 60 months from the effective
date of this AD, inspect the HSTA no-back mechanism pawls in
accordance with paragraph 2.C. of the Accomplishment Instructions of
the applicable service bulletin identified in figure 1 to paragraph
(g)(3) of this AD.
(i) If one or more pawls are not correctly installed: Before
further flight, replace the HSTA in accordance with paragraph 2.E.
of the Accomplishment Instructions of the applicable service
bulletin identified in figure 1 to paragraph (g)(3) of this AD.
(ii) If all the pawls are correctly installed, re-identify and
test the HSTA, and do all applicable corrective actions, in
accordance with paragraphs 2.C.(4) and 2.F. of the Accomplishment
Instructions of the applicable service bulletin identified in figure
1 to paragraph (g)(3) of this AD.
Figure 1 to Paragraph (g)(3)--Applicable Service Information
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Applicable bombardier
Airplane model service bulletin
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BD-100-1A10 (CH300 marketing)............. 100-27-20, Revision 01,
dated December 1, 2020.
BD-100-1A10 (CH 350 marketing)............ 350-27-009, Revision 01,
dated December 1, 2020.
------------------------------------------------------------------------
(4) If the serial number is listed in the table referred to in
paragraph 2.B.(5) of the Accomplishment Instructions of the
applicable service bulletin identified in figure 1 to paragraph
(g)(3) of this AD: Within 60 months from the effective date of this
AD, add a modification plate to the HSTA in accordance with
paragraph 2.D. of the Accomplishment Instructions of the applicable
service bulletin identified in figure 1 to paragraph (g)(3) of this
AD.
(5) If the records check is inconclusive, or if a visual check
instead of a records check of the HSTA was accomplished: Within 60
months from the effective date of this AD, verify the part numbers
and serial numbers of the HSTA, and verify the modification plate,
in accordance with paragraph 2.B. of the Accomplishment Instructions
of the applicable service bulletin identified in figure 1 to
paragraph (g)(3) of this AD.
(i) If the HSTA has part number (P/N) C47100-005: No further
action is required by this paragraph.
(ii) If the HSTA has P/N C47100-004 and a serial number that
ends with the suffix-K, or if the modification plate contains ``SB
C47100-27-02'' or ``SB C47100-27-03'': No further action is required
by this paragraph.
(iii) If the serial number is listed in the table referred to in
paragraph 2.B.(4) of the Accomplishment Instructions of the
applicable service bulletin identified in figure 1 to paragraph
(g)(3) of this AD: Within 60 months from the effective date of this
AD, inspect the HSTA no-back mechanism pawls in accordance with
paragraph 2.C. of the Accomplishment Instructions of the applicable
service bulletin identified in figure 1 to paragraph (g)(3) of this
AD.
(A) If one or more pawls are not correctly installed, before
further flight, replace the HSTA in accordance with Paragraph 2.E.
of the Accomplishment Instructions of the applicable service
bulletin identified in figure 1 to paragraph (g)(3) of this AD.
(B) If all the pawls are correctly installed, re-identify and
test the HSTA, and do all applicable corrective actions, in
accordance with paragraphs 2.C.(4) and 2.F. of the Accomplishment
Instructions of the applicable service bulletin identified in figure
1 to paragraph (g)(3) of this AD.
(iv) If the serial number is listed in the table referred to in
paragraph 2.B.(5) of the Accomplishment Instructions of the
applicable service bulletin identified in figure 1 to paragraph
(g)(3) of this AD: Within 60 months from the effective date of this
AD, add a modification plate to the HSTA in accordance with
paragraph 2.D. of the Accomplishment Instructions of the applicable
service bulletin identified in figure 1 to paragraph (g)(3) of this
AD.
(h) Parts Installation Prohibition
As of the effective date of this AD, no person may install an
HSTA with P/N C47100-003 or P/N C47100-004 that does not have either
the suffix-K following the serial number or a modification plate
showing ``SB C47100-27-02'' or ``SB C47100-27-03'' on any airplane.
(i) 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 the applicable service information identified
in paragraphs (i)(1) and (2) of this AD.
(1) Bombardier Service Bulletin 100-27-20, dated November 9,
2020.
(2) Bombardier Service Bulletin 350-27-009, dated November 9,
2020.
(j) 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
[[Page 39344]]
to the manager of the International Validation Branch, mail it to
ATTN: Program Manager, Continuing Operational Safety, at the address
identified in paragraph (k)(2) of this AD or email to: <a href="/cdn-cgi/l/email-protection#073e2a6671742a697e6664682a6468744761666629606871"><span class="__cf_email__" data-cfemail="c3faeea2b5b0eeadbaa2a0aceea0acb083a5a2a2eda4acb5">[email protected]</span></a>. If mailing information, also submit information by
email. 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.
(k) Additional Information
(1) Refer to Transport Canada AD CF-2022-55, dated September 21,
2022, for related information. This Transport Canada AD may be found
in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-0439.
(2) For more information about this AD, contact Chirayu Gupta,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7300; email <a href="/cdn-cgi/l/email-protection#467f6b2730356b283f2725296b2529350620272768212930"><span class="__cf_email__" data-cfemail="ac9581cddadf81c2d5cdcfc381cfc3dfeccacdcd82cbc3da">[email protected]</span></a>.
(3) Service information identified in this AD that is not
incorporated by reference is available at the addresses specified in
paragraphs (l)(3) and (4) of this AD.
(l) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of the service information listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless this AD specifies otherwise.
(i) Bombardier Service Bulletin 100-27-20, Revision 01, dated
December 1, 2020.
(ii) Bombardier Service Bulletin 350-27-009, Revision 01, dated
December 1, 2020.
(3) For service information 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#462725683f332a0627233429687a27662e3423207b" 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 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.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, email <a href="/cdn-cgi/l/email-protection#7513075b1c1b06051016011c1a1b351b1407145b121a03"><span class="__cf_email__" data-cfemail="6204104c0b0c11120701160b0d0c220c0310034c050d14">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on June 7, 2023.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023-12934 Filed 6-15-23; 8:45 am]
BILLING CODE 4910-13-P
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