Rule2021-22469
Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters
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
October 18, 2021
Effective
November 22, 2021
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 429 helicopters. This AD was prompted by reports of incorrectly staked spherical bearings in the directional control bellcrank assembly. This AD requires a one-time inspection of the lower surface of the spherical bearing in the directional control bellcrank assembly to determine if it is properly staked and, depending on the findings, applicable corrective actions. For certain helicopters, this AD also requires repetitive inspections and, depending on the findings, applicable corrective actions. This AD also provides a terminating action for the repetitive inspections. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 86 Issue 198 (Monday, October 18, 2021)</title>
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[Federal Register Volume 86, Number 198 (Monday, October 18, 2021)]
[Rules and Regulations]
[Pages 57560-57563]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2021-22469]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0575; Project Identifier MCAI-2020-00545-R;
Amendment 39-21749-; AD 2021-20-11]
RIN 2120-AA64
Airworthiness Directives; Bell Textron Canada Limited (Type
Certificate Previously Held by Bell Helicopter Textron Canada Limited)
Helicopters
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 Bell Textron Canada Limited (type certificate previously held
by Bell Helicopter Textron Canada Limited) Model 429 helicopters. This
AD was prompted by reports of incorrectly staked spherical bearings in
the directional control bellcrank assembly. This AD requires a one-time
inspection of the lower surface of the spherical bearing in the
directional control bellcrank assembly to determine if it is properly
staked and, depending on the findings, applicable corrective actions.
For certain helicopters, this AD also requires repetitive inspections
and, depending on the findings, applicable corrective actions. This AD
also provides a terminating action for the repetitive inspections. The
FAA is issuing this AD to address the unsafe condition on these
products.
DATES: This AD is effective November 22, 2021.
The Director of the Federal Register approved the incorporation by
reference of a certain document listed in this AD as of November 22,
2021.
ADDRESSES: For service information identified in this final rule,
contact Bell Textron Canada Limited, 12,800 Rue de l'Avenir, Mirabel,
Quebec J7J 1R4, Canada; telephone 1-450-437-2862 or 1-800-363-8023; fax
1-450-433-0272; email <a href="/cdn-cgi/l/email-protection#9bebe9f4ffeef8efe8eeebebf4e9efdbf9fef7f7fdf7f2fcf3efb5f8f4f6"><span class="__cf_email__" data-cfemail="38484a575c4d5b4c4b4d4848574a4c785a5d54545e54515f504c165b5755">[email protected]</span></a>; or at <a href="https://www.bellflight.com/support/contact-support">https://www.bellflight.com/support/contact-support</a>. You may view the referenced
service information at the FAA, Office of the Regional Counsel,
Southwest Region, 10101 Hillwood Pkwy., Room 6N-321, Fort Worth, TX
76177. For information on the availability of this material at the FAA,
call (817) 222-5110. It is also available at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and locating Docket No. FAA-2021-
0575.
[[Page 57561]]
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by
searching for and locating Docket No. FAA-2021-0575; 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
Transport Canada AD, any comments received, and other information. The
street 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.
FOR FURTHER INFORMATION CONTACT: Andrea Jimenez, Aerospace Engineer,
COS Program Management Section, Operational Safety Branch, Compliance &
Airworthiness Division, FAA, 1600 Stewart Ave., Suite 410, Westbury, NY
11590; telephone (516) 228-7330; email <a href="/cdn-cgi/l/email-protection#f2939c96809793dc989b9f979c9788b2949393dc959d84"><span class="__cf_email__" data-cfemail="c9a8a7adbbaca8e7a3a0a4aca7acb389afa8a8e7aea6bf">[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 Bell Textron
Canada Limited (type certificate previously held by Bell Helicopter
Textron Canada Limited) Model 429 helicopters. The NPRM published in
the Federal Register on July 23, 2021 (86 FR 38946). In the NPRM, the
FAA proposed to require a one-time inspection of the lower surface of
the spherical bearing in the directional control bellcrank assembly to
determine if it is properly staked and, depending on the findings,
applicable corrective actions. In the NPRM, the FAA also proposed to
require, for certain helicopters, repetitive inspections and, depending
on the findings, applicable corrective actions. The NPRM was prompted
by Transport Canada AD CF-2020-11, dated April 16, 2020 (Transport
Canada AD CF-2020-11), issued by Transport Canada, which is the
aviation authority for Canada, to correct an unsafe condition for Bell
Textron Canada Limited (Bell) Model 429 helicopters, serial numbers
57001 through 57210, 57212 through 57344, 57346 through 57371, 57374
through 57377, and 57380. Transport Canada advises that there are
reports of incorrectly staked spherical bearings in the directional
control bellcrank assembly. This condition, if not addressed, could
result in wear or elongation of the bore in the bellcrank, which could
result in reduced helicopter directional control.
Accordingly, Transport Canada AD CF-2020-11 requires a one-time
inspection to determine if a spherical bearing is properly staked in
the directional control bellcrank assembly, and, depending on the
findings, replacement of the spherical bearing with a new spherical
bearing, repair of an affected bellcrank assembly and repetitive
inspections of that repaired bellcrank assembly, or replacement of the
affected bellcrank assembly with a serviceable part. Transport Canada
AD CF-2020-11 also provides terminating actions for the requirements of
that AD.
Discussion of Final Airworthiness Directive
Comments
The FAA received a comment from one commenter, Air Methods. The
following presents the comment received on the NPRM and the FAA's
response.
Request To Include Additional Revision Level in Credit Paragraph
Air Methods requested that Bell Alert Service Bulletin 429-19-50,
Revision B, dated December 19, 2019 (Bell Alert Service Bulletin 429-
19-50, Revision B) be included in the ``Credit for Previous Actions''
paragraph of the proposed AD. The commenter stated that Revision B of
the service bulletin was released on December 19, 2019.
The FAA infers that the commenter mentioned the date of Revision B
of the service bulletin to show that it was released prior to the
effective date of the final rule. The FAA acknowledges the commenter's
request and agrees to provide clarification. The requirements of
paragraphs (g) and (h) of this AD refer to Bell Alert Service Bulletin
429-19-50, Revision B, as the appropriate source of information for
doing the actions required by those paragraphs. Paragraph (f),
``Compliance,'' of this AD states ``comply with this AD within the
compliance times specified, unless already done.'' The words ``unless
already done'' in paragraph (f) of this AD, in conjunction with the
requirements of paragraphs (g) and (h) of this AD, which specify that
operators use Bell Alert Service Bulletin 429-19-50, Revision B, as the
appropriate source of information, already account for the use of Bell
Alert Service Bulletin 429-19-50, Revision B, prior to the effective
date of this AD. Therefore, if operators have accomplished the actions
required for compliance with this AD before the effective date of this
AD, no further action is necessary and it is not necessary to include
Bell Alert Service Bulletin 429-19-50, Revision B, in paragraph (j) of
this AD (the ``Credit for Previous Actions'' paragraph). The FAA has
not revised this AD in this regard.
Conclusion
These helicopters have been approved by the aviation authority of
Canada and are approved for operation in the United States. Pursuant to
the FAA's bilateral agreement with Canada, Transport Canada, its
technical representative, has notified the FAA of the unsafe condition
described in its AD. 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 these helicopters. 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.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Bell Alert Service Bulletin 429-19-50, Revision B.
This service information specifies procedures for an initial inspection
of the lower surface of the spherical bearing in the directional
control bellcrank assembly to determine if it is properly staked,
additional inspections, and corrective actions. The corrective actions
include installation of a new spherical bearing, repair (including re-
identification of the bellcrank assembly part number), and replacement
of the bellcrank assembly. The additional inspections include an
inspection of the upper surface of the spherical bearing in the
directional control bellcrank assembly to determine if it is properly
staked, an inspection of the bore in the bellcrank assembly for
excessive wear (including mechanical or corrosion damage that exceed
0.001 inch (0.03 millimeter) maximum depth for 4 of the circumference,
and any cracking); and, for any helicopter with a bellcrank assembly
that is repaired, repetitive inspections of the lower surface of the
spherical bearing to determine if it has moved.
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.
Other Related Service Information
The FAA also reviewed Bell Alert Service Bulletin 429-19-50, dated
November 27, 2019; and Revision A, dated December 2, 2019. Bell Alert
Service Bulletin 429-19-50, dated November 27, 2019, specifies
procedures for an initial inspection of the spherical bearing in the
directional control bellcrank assembly to determine
[[Page 57562]]
if it is properly staked and replacement of the spherical bearing with
a new spherical bearing if it is determined that the spherical bearing
was not properly staked.
Bell Alert Service Bulletin 429-19-50, Revision A, dated December
2, 2019, specifies procedures for an initial inspection of the lower
surface of the spherical bearing in the directional control bellcrank
assembly to determine if it is properly staked, additional inspections,
and corrective actions. The corrective actions include installation of
a new spherical bearing. The additional inspections include an
inspection of the upper surface of the spherical bearing in the
directional control bellcrank assembly to determine if it is properly
staked, and an inspection of the bore in the bellcrank assembly for
excessive wear.
Costs of Compliance
The FAA estimates that this AD affects 120 helicopters of U.S.
Registry. Labor rates are estimated at $85 per work-hour. Based on
these numbers, the FAA estimates the following costs to comply with
this AD.
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Inspection....................... 1 work-hour x $85 $0 $85 per inspection $10,200 per
per hour = $85 per cycle. inspection cycle.
inspection cycle.
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The FAA estimates the following costs to do any necessary actions
that would be required based on the results of the inspection. The
agency has no way of determining the number of helicopters that might
need these actions:
On-Condition Costs
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Action Labor cost Parts cost Cost per product
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Replacement Spherical Bearing........... 7 work-hours x $85 per $56 $651.
hour = $595.
Repair/replacement Bellcrank............ 4 work-hours x $85 per 2,856 3,196.
hour = $340.
Repetitive Inspections.................. 1 work-hour x $85 per hour 0 85 per inspection cycle.
= $85 per inspection
cycle.
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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 helicopters 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:
2021-20-11 Bell Textron Canada Limited (Type Certificate Previously
Held by Bell Helicopter Textron Canada Limited): Amendment 39-21749;
Docket No. FAA-2021-0575; Project Identifier MCAI-2020-00545-R.
(a) Effective Date
This airworthiness directive (AD) is effective November 22,
2021.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bell Textron Canada Limited (type certificate
previously held by Bell Helicopter Textron Canada Limited) Model 429
helicopters, certificated in any category, serial numbers 57001
through 57210 inclusive, 57212 through 57344 inclusive, 57346
through 57371 inclusive, 57374 through 57377 inclusive, and 57380.
(d) Subject
Joint Aircraft Service Component (JASC) Code: 6700, Rotorcraft
Flight Control.
(e) Unsafe Condition
This AD was prompted by reports of incorrectly staked spherical
bearings in the directional control bellcrank assembly. The FAA is
issuing this AD to address incorrectly staked spherical bearings in
the directional control bellcrank assembly. This condition, if not
addressed, could result in wear or elongation of the bore in the
bellcrank, which could result in reduced helicopter directional
control.
[[Page 57563]]
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Inspection and Corrective Actions
Within 25 hours time-in-service (TIS) or 90 days, whichever
occurs first after the effective date of this AD: Inspect the lower
surface of the spherical bearing on the directional control
bellcrank assembly to determine if it is properly staked, in
accordance with the Accomplishment Instructions, Part I, step 7., of
Bell Alert Service Bulletin 429-19-50, Revision B, dated December
19, 2019 (BASB 429-19-50, Revision B). After the inspection, before
further flight, do the applicable action required by paragraph
(g)(1) or (2) of this AD.
(1) If the lower surface of the spherical bearing is improperly
staked (any discrepancy is found e.g., the witness marks are not
present and intact or the staked lip is not uniform along the
chamfer): Inspect the bore in the bellcrank assembly for excessive
wear (including mechanical or corrosion damage that exceed 0.001
inch (0.03 millimeter) maximum depth for \1/4\ of the circumference,
and any cracking); in accordance with the Accomplishment
Instructions, Part I, steps 10. through 13., of BASB 429-19-50,
Revision B, and depending on the findings, do the applicable actions
required by paragraph (g)(1)(i) or (ii) of this AD before further
flight.
(i) If the bore in the bellcrank assembly shows signs of
excessive wear: Repair the bellcrank, including re-identifying the
bellcrank assembly part number, in accordance with the
Accomplishment Instructions, Part II, steps 1. through 13., of BASB
429-19-50, Revision B.
(ii) If the bore diameter is within 0.001 inch (0.03 millimeter)
maximum depth for \1/4\ of the circumference: Install a new
spherical bearing, in accordance with the Accomplishment
Instructions, Part II, steps 4. through 12., of BASB 429-19-50,
Revision B.
(2) If the lower surface of the spherical bearing is properly
staked: Inspect the upper surface of the spherical bearing on the
directional control bellcrank assembly to determine if it is
properly staked, in accordance with the Accomplishment Instructions,
Part I, steps 8. and 9., of BASB 429-19-50, Revision B, and
depending on the findings, do the applicable actions required by
paragraph (g)(2)(i) or (ii) of this AD before further flight.
(i) If the spherical bearing is properly staked: No further
action is required by this AD.
(ii) If the spherical bearing is not properly staked (any
discrepancy is found e.g., the witness marks are not present and
intact or the staked lip is not uniform along the chamfer): Inspect
the bore in the bellcrank assembly for excessive wear (including
mechanical or corrosion damage that exceed 0.001 inch (0.03
millimeter) maximum depth for \1/4\ of the circumference, and any
cracking), in accordance with the Accomplishment Instructions, Part
I, steps 10. through 13., of BASB 429-19-50, Revision B, and
depending on the findings, do the applicable actions required by
paragraph (g)(2)(ii)(A) or (B) of this AD before further flight.
(A) If the bore in the bellcrank assembly shows signs of
excessive wear: Repair the bellcrank, including re-identifying the
bellcrank assembly part number, in accordance with the
Accomplishment Instruction, Part II, steps 1. through 13., of BASB
429-19-50, Revision B.
(B) If the bore diameter is within 0.001 inch (0.03 millimeter)
maximum depth for \1/4\ of the circumference: Install a new
spherical bearing, in accordance with the Accomplishment
Instructions, Part II, steps 4. through 12., of BASB 429-19-50,
Revision B.
(h) Required Post Repair Inspections
For any helicopter on which the bellcrank has been repaired as
required by paragraphs (g)(1)(i) or (g)(2)(ii)(A) of this AD: Within
100 hours TIS after the repair, and thereafter at intervals not to
exceed 100 hours TIS, inspect the lower surface of the spherical
bearing to determine if it has moved, in accordance with the
Accomplishment Instructions, Part III, step 7., of BASB 429-19-50,
Revision B. If the spherical bearing has moved (is loose): Before
further flight, inspect the bore in the bellcrank assembly to
determine if the diameter exceeds 0.6283 inch (15.9588 millimeters),
in accordance with the Accomplishment Instructions, Part III, steps
8. through 11., of BASB 429-19-50, Revision B.
(1) If the diameter of the bore in the bellcrank assembly
exceeds 0.6283 inch (15.9588 millimeters): Before further flight
replace the bellcrank assembly.
(2) If the diameter of the bore in the bellcrank assembly does
not exceed 0.6283 inch (15.9588 millimeters): Before further flight
install a new spherical bearing in accordance with the
Accomplishment Instructions, Part II, steps 4. through 12., of BASB
429-19-50, Revision B.
(i) Terminating Action
Replacement of a bellcrank assembly with a new part (never
installed on a helicopter or has accumulated zero hours TIS) is
terminating action for the requirements of this AD for that
helicopter only.
(j) 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 service information identified in
paragraph (j)(1) or (2) of this AD.
(1) Bell Alert Service Bulletin 429-19-50, dated November 27,
2019.
(2) Bell Alert Service Bulletin 429-19-50, Revision A, dated
December 2, 2019.
(k) Alternative Methods of Compliance (AMOCs)
(1) 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 local Flight
Standards District Office, as appropriate. If sending information
directly to the manager of the International Validation Branch, send
it to the attention of the person identified in paragraph (l)(1) of
this AD. Information may be emailed to: <a href="/cdn-cgi/l/email-protection#380115796e6b1579716a150f0b08157975777b785e5959165f574e"><span class="__cf_email__" data-cfemail="033a2e4255502e424a512e3430332e424e4c40436562622d646c75">[email protected]</span></a>.
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(l) Related Information
(1) For more information about this AD, contact Andrea Jimenez,
Aerospace Engineer, COS Program Management Section, Operational
Safety Branch, Compliance & Airworthiness Division, FAA, 1600
Stewart Ave., Suite 410, Westbury, NY 11590; telephone (516) 228-
7330; email <a href="/cdn-cgi/l/email-protection#89e8e7edfbece8a7e3e0e4ece7ecf3c9efe8e8a7eee6ff"><span class="__cf_email__" data-cfemail="c4a5aaa0b6a1a5eaaeada9a1aaa1be84a2a5a5eaa3abb2">[email protected]</span></a>.
(2) Bell Alert Service Bulletin 429-19-50, dated November 27,
2019; and Bell Alert Service Bulletin 429-19-50, Revision A, dated
December 2, 2019; which are not incorporated by reference, contain
additional information about the subject of this AD. This service
information is available at the contact information specified in
paragraphs (m)(3) and (4) of this AD.
(3) The subject of this AD is addressed in Transport Canada AD
CF-2020-11, dated April 16, 2020. You may view the Transport Canada
AD at <a href="https://www.regulations.gov">https://www.regulations.gov</a> in Docket No. FAA-2021-0575.
(m) 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 the AD specifies otherwise.
(i) Bell Alert Service Bulletin 429-19-50, Revision B, dated
December 19, 2019.
(ii) [Reserved]
(3) For Bell Helicopter service information identified in this
AD, contact Bell Textron Canada Limited, 12,800 Rue de l'Avenir,
Mirabel, Quebec J7J 1R4, Canada; telephone 1-450-437-2862 or 1-800-
363-8023; fax 1-450-433-0272; email <a href="/cdn-cgi/l/email-protection#e090928f84958394939590908f9294a082858c8c868c89878894ce838f8d"><span class="__cf_email__" data-cfemail="96e6e4f9f2e3f5e2e5e3e6e6f9e4e2d6f4f3fafaf0fafff1fee2b8f5f9fb">[email protected]</span></a>;
or at <a href="https://www.bellflight.com/support/contact-support">https://www.bellflight.com/support/contact-support</a>.
(4) You may view this service information at the FAA, Office of
the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room
6N-321, Fort Worth, TX 76177. For information on the availability of
this material at the FAA, call (817) 222-5110.
(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#0f697d2166617c7f6a6c7b6660614f616e7d6e21686079"><span class="__cf_email__" data-cfemail="f69084d89f9885869395829f9998b698978497d8919980">[email protected]</span></a>, or go to: <a href="https://www.archives.gov/federal-register/cfr/ibr-locations.html">https://www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on September 16, 2021.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2021-22469 Filed 10-15-21; 8:45 am]
BILLING CODE 4910-13-P
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This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.