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2022-06-20 BELL TEXTRON CANADA LIMITED (TYPE CERTIFICATE PREVIOUSLY HELD BY BELL HELICOPTER TEXTRON CANADA LIMITED): Amendment 39-21986; Docket No. FAA-2021-1178; Project Identifier MCAI-2021-00986-R.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) is effective April 26, 2022.

(b) AFFECTED ADS

    This AD replaces AD 2020-20-06,  Amendment 39-21262 (85 FR 60356, Sep-
    tember 25, 2020) (AD 2020-20-06).

(c) APPLICABILITY

    This AD applies to Bell Textron Canada Limited  (type certificate pre-
    viously held by Bell Helicopter Textron Canada Limited) Model 429 hel-
    icopters, certificated in any category, with a bellcrank assembly part
    number (P/N) 429-001-523-101, 429-001-523-103, 429-001-532-101 or 429-
    001-532-103 installed.

(d) SUBJECT

    Joint Aircraft Service Component (JASC) Code: 2700 Flight Control Sys-
    tem.

(e) UNSAFE CONDITION

    This AD was prompted by new bellcrank assemblies,  which have been up-
    graded with  corrosion resistant  steel bearings.  The FAA  is issuing
    this AD to  prevent corrosion of  the bearings due  to pooling at  the
    bellcrank assembly from  precipitation in the  forward portion of  the
    roof structure. The unsafe  condition, if not addressed,  could result
    in  restrictions  in  the collective,  directional,  or  pitch control
    systems, and subsequent loss of helicopter control.

(f) COMPLIANCE

    Comply with this AD within the compliance times specified,  unless al-
    ready done.

(g) REQUIRED ACTIONS

(1) For Model 429 helicopters serial number  (S/N) 57001 through 57296 in-
    clusive,  within 12 months after the helicopter was manufactured or 30
    days after the effective date of this AD,  whichever occurs later, and
    thereafter at intervals not to exceed 6 months:

(i) Disconnect the forward ends of the collective control tube, longitudi-
    nal stability  and  control augmentation system  (SCAS) actuator,  and
    lateral SCAS actuator.  Stow the collective control tube and each SCAS
    actuator to prevent binding.

(ii) Move the cyclic stick fore, aft, and laterally,  and  the  collective
     stick up  and down  from stop  to stop  to determine  if there is any
     roughness. If there  is any roughness  in the flight  control system,
     before further flight, remove each pivot bearing P/N MS27646-41, each
     arm assembly bearing P/N MS27643-4 and each sleeve P/N 120-13-4A from
     service and  install bellcrank  assemblies P/N  429-001-523-101FM and
     429-001-532-101FM; or 429-001-523-107FM and 429-001-532-107FM; or 429
     -001-523-107 and 429-001-532-107.

(iii) Inspect the collective arm assembly P/N 429-001-525-101, the lateral
      arm assembly P/N 429-001-527-101,  and the longitudinal arm assembly
      P/N  429-001-530-101,  by  rotating  each  bearing  and  determining
      whether each bearing rotates freely.  If there is any binding in any
      arm end bearing  or  on  the longitudinal bellcrank assembly, before
      further flight,  remove each pivot bearing P/N MS27646-41,  each arm
      assembly bearing P/N MS27643-4,  and each sleeve  P/N 120-13-4A from
      service and install bellcrank assemblies  P/N 429-001-523-101FM  and
      429-001-532-101FM;  or  429-001-523-107FM and 429-001-532-107FM;  or
      429-001-523-107 and 429-001-532-107.

(2) For  Model 429 helicopters  S/N 57001 through 57296 inclusive,  unless
    already accomplished  by  following  paragraphs (g)(1)(ii) or (iii) of
    this AD, within 24 months after the effective date of this AD, install
    bellcrank assemblies  P/N 429-001-523-101FM and 429-001-532-101FM;  or
    429-001-523-107FM and 429-001-532-107FM;  or  429-001-523-107 and 429-
    001-532-107.

(3) As of the effective date of this AD,  installing  bellcrank assemblies
    P/N 429-001-523-101FM and 429-001-532-101FM;  or 429-001-523-107FM and
    429-001-532-107FM; or 429-001-523-107 and 429-001-532-107, constitutes
    a terminating action  for the recurring inspections  required by para-
    graph (g)(1) of this AD.

(4) As of the effective date of this AD,  do  not  install  any  bellcrank
    assembly P/N 429-001-523-101, 429-001-523-103, 429-001-532-101 or 429-
    001-532-103 on any helicopter.

(h) SPECIAL FLIGHT PERMITS

    Special flight permits are prohibited.

(i) 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 (j)(1)  of this AD. Information may  be
    emailed to: 9-AVS-AIR-730-AMOC@faa.gov.

(2) Before using any approved AMOC,  notify your appropriate principal in-
    spector, or lacking  a principal inspector,  the manager of  the local
    flight standards district office/certificate holding district office.

(j) 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 andrea.jimenez@faa
    .gov.

(2) For 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 productsupport@bellflight.com; or at https://www.bellflight.com/
    support/contact-support. You may view this referenced service informa-
    tion  at  the  FAA,  Office of the Regional Counsel, Southwest Region,
    10101 Hillwood Pkwy., Room 6N-321, Fort Worth, TX 76177.  For informa-
    tion on the availability of this material at the FAA,  call (817) 222-
    5110.

(3) The subject of this  AD is addressed  in Transport Canada  AD CF-2016-
    11R3, dated August 30, 2021.  You may view  the Transport Canada AD on
    the internet  at  https://www.regulations.gov  in Docket No. FAA-2021-
    1178.

(k) MATERIAL INCORPORATED BY REFERENCE

    None.

Issued on March 10, 2022. Ross Landes, Deputy Director for Regulatory Oper
-ations, Compliance & Airworthiness Division, Aircraft Certification Serv-
ice.

FOR FURTHER INFORMATION CONTACT:  Andrea Jimenez,  Aerospace Engineer, COS
Program Management Section,  Operational Safety Branch,  Compliance & Air-
worthiness Division, FAA, 1600 Stewart Ave, Suite 410, Westbury, NY 11590;
telephone (516) 228-7330; email andrea.jimenez@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-1178; Project Identifier MCAI-2021-00986-R;
Amendment 39-21986; AD 2022-06-20]
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), Department of
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2020-20-
06, which applied to certain Bell Helicopter Textron Canada Limited
(now Bell Textron Canada Limited) Model 429 helicopters. AD 2020-20-06
required repetitive inspections of certain cyclic and collective
assembly bearings. This AD was prompted by new bellcrank assemblies,
which have been upgraded with corrosion resistant steel bearings. This
AD retains certain requirements of AD 2020-20-06, and depending on the
inspection results, requires removing certain parts from service and
installing the upgraded cyclic and collective bellcrank
assemblies. This AD also requires installing the upgraded collective
and cyclic bellcrank assemblies on certain helicopters if not already
installed, and prohibits installing certain bellcrank assemblies. The
FAA is issuing this AD to address the unsafe condition on these
products.

DATES: This AD is effective April 26, 2022.

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 productsupport@bellflight.com; or at https://www.bellflight.com/support/contact-support. 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.

Examining the AD Docket

You may examine the AD docket at https://www.regulations.gov by
searching for and locating Docket No. FAA-2021-1178; 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
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 andrea.jimenez@faa.gov.

SUPPLEMENTARY INFORMATION:

Background

The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2020-20-06, Amendment 39-21262 (85 FR
60356, September 25, 2020) (AD 2020-20-06). AD 2020-20-06 applied to
Bell Helicopter Textron Canada Limited Model 429 helicopters with a
bellcrank assembly part number (P/N) 429-001-523-101, 429-001-523-103,
429-001-532-101, or 429-001-532-103 installed. The NPRM published in
the Federal Register on January 14, 2022 (87 FR 2362). In the NPRM, the
FAA proposed to retain some of the requirements of AD 2020-20-06, and
proposed to require, for certain serial-numbered helicopters, within 12
months after the helicopter was manufactured or 30 days, whichever
occurs later, and thereafter at intervals not to exceed 6 months,
disconnecting certain parts, stowing certain parts to prevent binding,
and moving the cyclic stick and the collective stick to inspect for
roughness in the flight control system and binding in the collective,
lateral, and longitudinal arm assemblies. If any of these conditions
exist, the NPRM proposed to require, before further flight, removing
certain parts from service and installing upgraded bellcrank
assemblies.
Additionally, the NPRM proposed to require, for certain serial-
numbered helicopters that do not have the upgraded bellcrank assemblies
installed, within 24 months, installing the upgraded bellcrank
assemblies, which would provide a terminating action for the recurring
inspections. Finally, the NPRM proposed to prohibit installing any
affected bellcrank assembly on any helicopter.
The NPRM was prompted by Transport Canada AD CF-2016-11R3, dated
August 30, 2021 (Transport Canada AD CF-2016-11R3), issued by Transport
Canada, which is the aviation authority for Canada, to correct an
unsafe condition for Bell Textron Canada Limited Model 429 helicopters,
all serial numbers. Transport Canada advises of new collective and
cyclic bellcrank assemblies which have been upgraded with corrosion
resistant steel bearings. This condition, if not addressed, could
result in restrictions in the collective, directional, or pitch control
systems, and subsequent loss of helicopter control.
Accordingly, Transport Canada AD CF-2016-11R3 requires for certain
serial-numbered helicopters, within 12 months from the helicopter
manufacture date, or for helicopters that have exceeded the age
threshold of 12 months from the helicopter manufacturer date, within 30
days, and thereafter at intervals not to exceed 6 months, performing a
functional check of the flight controls to detect roughness in the
pivot bearings and binding of the collective, lateral, or longitudinal
arm end bearings of the bellcrank assemblies. If any roughness or
binding is detected, Transport Canada AD CF-2016-11R3 requires
replacement of each affected bellcrank assembly before further flight.
Transport Canada AD CF-2016-11R3 also requires, within 24 months,
installing the upgraded collective and cyclic bellcrank assemblies and
considers this action a terminating action to the recurring
inspections. Finally, Transport Canada AD CF-2016-11R3 prohibits an
affected bellcrank assembly from being installed on any helicopter.

Discussion of Final Airworthiness Directive

Comments

The FAA received no comments on the NPRM or on the determination of
the costs.

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, 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. This AD is adopted as proposed in the NPRM.

Related Service Information

The FAA reviewed Bell Technical Bulletin 429-18-58, Revision B,
dated August 23, 2021 (TB 429-18-58 Rev B), which specifies procedures
to upgrade certain part-numbered bellcrank assemblies to the bellcrank
assemblies that utilize the corrosion resistant steel bearings.
The FAA also reviewed Bell Helicopter Alert Service Bulletin 429-
15-21, Revision C, dated August 23, 2021 (ASB 429-15-21 Rev C), which
specifies moving the cyclic stick fore, aft, and laterally, and the
collective stick up and down from stop to stop to detect deteriorated
pivot bearings. ASB 429-15-21 Rev C also specifies inspecting to
determine whether the bearings in the collective, lateral, and
longitudinal arm assemblies rotate freely. If discrepant arm bearings
are found, ASB 429-15-21 Rev C specifies contacting Bell Product
Support Engineering to report the findings and replacing the discrepant
parts with serviceable parts.

Differences Between This AD and Transport Canada AD CF-2016-11R3

Transport Canada AD CF-2016-11R3 provides requirements if the most
recent functional check was performed using a hydraulic test stand as
an alternate procedure. This AD provides no such alternate procedure.
Transport Canada AD CF-2016-11R3 provides requirements for helicopters
that have exceeded the age threshold of 12 months from the helicopter
manufacturer date to complete the initial functional check within 30
days from the effective date of its AD. This AD requires the initial
inspection within 12 months after the helicopter was manufactured or 30
days after the effective date of this AD, whichever occurs later.
Transport Canada AD CF-2016-11R3 allows credit for the corrective
actions of Part I if the initial functional check was accomplished
prior to the effective date of Transport Canada AD CF-2016-11R3,
whereas this AD does not.

Costs of Compliance

The FAA estimates that this AD affects 64 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.
Inspecting the cyclic and the collective bellcrank assemblies for
roughness in the pivot bearings and binding in the collective, lateral,
and longitudinal arm end bearings takes about 3 work-hours for an
estimated cost of $255 per inspection cycle.
Installing the upgraded collective and cyclic bellcrank assemblies
takes about 18 work-hours and parts cost about $1,750 for an estimated
cost of $3,280 per upgrade installation.
The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some of 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

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]

2. The FAA amends Sec. 39.13 by:

a. Removing Airworthiness Directive 2020-20-06, Amendment 39-21262 (85
FR 60356, September 25, 2020); and

b. Adding the following new airworthiness directive: