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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-0090; Project Identifier MCAI-2021-00399-T;
Amendment 39-22021; AD 2022-09-01]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc., Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD)
for
certain Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601),
and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. This AD
was prompted by a report of smoke in the aft cabin during a maintenance
activity, which an investigation determined was caused by a faulty
drain line ribbon heater. This AD requires a general visual inspection
of all affected potable water-line ribbon heater installations and
corrective actions and other specified actions. The FAA is issuing this
AD to address the unsafe condition on these products.
DATES: This AD is effective May 31, 2022.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of May 31, 2022.
ADDRESSES: For service information identified in this final rule,
contact Bombardier Business Aircraft Customer Response Center, 400
Cote-Vertu Road West, Dorval, Quebec H4S 1Y9, Canada;
telephone 514-855-2999; email ac.yul@aero.bombardier.com; internet
http://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. It is also available on
the internet at https://www.regulations.gov by searching for and
locating Docket No. FAA-2022-0090.
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-2022-
0090; 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.
FOR FURTHER INFORMATION CONTACT: Thomas Niczky, Aerospace Engineer,
Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7347;
fax 516-794-5531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:
Discussion
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued TCCA AD CF-2021-13, dated April 1,
2021 (TCCA AD CF-2021-13) (also referred to as the MCAI), to correct an
unsafe condition for Bombardier, Inc., Model CL-600-1A11 (600), CL-600-
2A12 (601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants)
airplanes, equipped with any Cox & Co. 3043 or 3044 series (potable
water-line) ribbon heater. 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-2022-0090.
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 CL-600-1A11 (600), CL-600-2A12 (601), and CL-600-2B16 (601-
3A, 601-3R, and 604 Variants) airplanes. The NPRM published in the
Federal Register on February 8, 2022 (87 FR 7056). The NPRM was
prompted by a report of smoke in the aft cabin during a maintenance
activity, which an investigation determined was caused by a faulty
drain line ribbon heater. The NPRM proposed to require a general visual
inspection of all affected potable water-line ribbon heater
installations and corrective actions and other specified actions. The
FAA is issuing this AD to address faulty potable water-line ribbon
heaters, which, if not corrected, could lead to an onboard fire. See
the MCAI for additional background information.
Comments
The FAA gave the public the opportunity to participate in
developing this final rule. The FAA received no comments on the NPRM or
on the determination of the cost to the public.
Conclusion
The FAA reviewed the relevant data and determined that air safety
and the public interest require adopting this final rule as proposed,
except for minor editorial changes. The FAA has determined that these
minor changes:
Are consistent with the intent that was proposed in the
NPRM for addressing the unsafe condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM.
Related Service Information Under 1 CFR Part 51
Bombardier has issued Service Bulletin 601-0644, Revision 1, dated
January 29, 2019; and Service Bulletin 604-30-007, Revision 1, dated
January 29, 2019. This service information describes procedures for a
general visual inspection of all affected potable water-line ribbon
heater installations for any discrepancy and applicable corrective
actions and other specified actions. Discrepancies include
discoloration, blistering or cracking of insulation, signs of wear, or
heat damage. Corrective actions include replacement of discrepant
insulation and ribbon heaters. Other specified actions include
identifying the potable water-line ribbon heater pigtail wire
configuration, installing a fuse to the ribbon heater power lead, and
testing the potable water-line heater system of each ribbon heater.
These documents are distinct since they apply to different airplane
models. 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 affects 585 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 |
| Up to 30 work-hours x $85 per
hour = Up to $2,550 |
$268 |
Up to $2,818 |
Up to $1,648,530 |
The FAA estimates the following costs
to do any necessary on-
condition action 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 on-condition action:
Estimated Costs of On-Condition Actions
|
Labor cost
|
Parts cost
|
Cost per
product
|
| Up
to 30 work-hours x $85 per hour
= $2,550 |
Up to $39,552
*
|
$42,102
|
* The parts cost for a single potable
water-line ribbon heater and
associated material is $4,944. The estimated cost above assumes the
worst case scenario of replacing all eight ribbon heaters on an
airplane configured with eight ribbon heaters.
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 adding the following new airworthiness
directive:
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