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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2017-0474; Directorate Identifier 2016-NM-096-AD]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. (Type Certificate
Previously Held by Canadair Limited) Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to supersede Airworthiness Directive (AD) 2011-03-
08, for certain Bombardier, Inc., Model CL-215-1A10 (CL-215), CL-215-
6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) airplanes. AD
2011-03-08 currently requires an inspection to determine the number of
flight cycles accumulated by certain accumulators installed on the
airplane, and repetitive inspections of the accumulators for cracks and
replacement if necessary. Since we issued AD 2011-03-08, we determined
that a terminating action is necessary to address the identified unsafe
condition. This proposed AD would add a requirement for the terminating
action. We are proposing this AD to address the unsafe condition on
these products.
DATES: We must receive comments on this proposed AD by July 3,
2017.
ADDRESSES: You may send comments, using the procedures found in
14 CFR
11.43 and 11.45, by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the
instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC 20590.
Hand Delivery: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC, between 9 a.m. and 5 p.m., Monday
through Friday, except Federal holidays.
For service information identified in this NPRM, contact
Bombardier, Inc., 400 Cote-Vertu Road West, Dorval, Quebec
H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; email
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You
may view this referenced service information at the FAA, Transport
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information
on the availability of this material at the FAA, call 425-227-1221.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.
gov by searching for and locating Docket No. FAA-2017-0474;
or in person at the Docket Management Facility between 9 a.m. and
5 p.m., Monday through Friday, except Federal holidays. The AD docket
contains this proposed AD, the regulatory evaluation, any comments
received, and other information. The street address for the Docket
Operations office (telephone 800-647-5527) is in the ADDRESSES section.
Comments will be available in the AD docket shortly after receipt.
FOR FURTHER INFORMATION CONTACT: Cesar A. Gomez, Aerospace Engineer,
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft
Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury,
NY 11590; telephone 516-228-7318; fax 516-794-5531.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include "Docket No. FAA-2017-0474;
Directorate Identifier 2016-NM-096-AD" at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD based on those comments.
We will post all comments we receive, without change, to http://www.
regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
On January 26, 2011, we issued AD 2011-03-08, Amendment 39-16592
(76 FR 6536, February 7, 2011) ("AD 2011-03-08"), for certain
Bombardier, Inc., Model CL-215-1A10 (CL-215), CL-215-6B11 (CL-215T
Variant), and CL-215-6B11 (CL-415 Variant) airplanes. AD 2011-03-08 was
prompted by reports of seven cases of on-ground hydraulic accumulator
screw cap or end cap failure, which have resulted in loss of the
associated hydraulic system and high-energy impact damage to adjacent
systems and structure. AD 2011-03-08 requires an inspection to determine
the number of flight cycles accumulated by applicable accumulators (i.e.,
brake, aileron, elevator, and rudder accumulators) installed on the air-
plane. AD 2011-03-08 also requires repetitive ultrasonic inspections of
the accumulators for cracks and replacement of any accumulator in which
a
crack is detected. We issued AD 2011-03-08 to detect and correct cracking
of the accumulator, which could result in loss of the associated hydraulic
system and high-energy impact damage to adjacent systems and structure,
potentially resulting in fuel spillage, uncommanded flap movement, or
loss
of aileron control.
Since we issued AD 2011-03-08, terminating action for the
repetitive inspections has been developed. We have determined that a
terminating action (relocation of the affected accumulators, and
incorporation of new airworthiness limitations) is necessary to address
the identified unsafe condition.
Transport Canada Civil Aviation (TCCA), which is the aviation
authority for Canada, has issued Canadian Airworthiness Directive CF-
2009-42R2, dated June 13, 2016 (referred to after this as the Mandatory
Continuing Airworthiness Information, or "the MCAI"), to correct an
unsafe condition for certain Bombardier, Inc., Model CL-215-1A10 (CL-
215), CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant)
airplanes. The MCAI states:
Seven cases of on-ground hydraulic accumulator screw cap or end
cap failure have been experienced on CL-600-2B19 (CRJ) aeroplane,
resulting in loss of the associated hydraulic system and high-energy
impact damage to adjacent systems and structure. To date, the lowest
number of flight cycles accumulated at the time of failure has been
6991.
Although there have been no failures to date on any CL-215-1A10
(CL-215) or CL-215-6B11 (CL-215T and CL-415) aeroplane, similar
accumulators, Part Number (P/N) 08-8423-010 (MS28700-3), to those
installed on the CL-600-2B19, are installed on the aeroplane models
listed in the Applicability section of this [Canadian] AD.
A detailed analysis of the systems and structure in the
potential line of trajectory of a failed screw cap/end cap for each
accumulator has been conducted. It has identified that the worst-
case scenarios would be impact damage to various components,
potentially resulting in fuel spillage, uncommanded flap movement,
or loss of aileron control.
This [Canadian] AD mandates repetitive [ultrasonic] inspections
of the accumulators for cracks and replacement of any accumulator in
which a crack is detected.
Revision 1 of this [Canadian] AD clarified the text of the
[Canadian] AD, including the P/N of the affected accumulators.
This revision provides the terminating action [relocation of the
affected accumulators, and incorporating new airworthiness
limitations] to this [Canadian] AD. It also modifies the
applicability range for the CL-215-1A10 (CL-215); the CL-215 is out
of production and the last aeroplane produced was serial number
1125.
You may examine the MCAI in the AD docket on the Internet at http://www.
regulations.gov by searching for and locating Docket No. FAA-2017-0474.
Related Service Information Under 1 CFR Part 51
We reviewed the following Bombardier, Inc., service information:
Bombardier Canadair 215 Service Bulletin 215-552, Revision
2, dated June 18, 2015. This service information describes procedures
to relocate the aileron hydraulic accumulator aft of its current
location.
Bombardier Canadair 215T Service Bulletin 215-3158,
Revision 2, dated April 15, 2014; and Bombardier 415 Service Bulletin
215-4423, Revision 5, dated March 17, 2016. These documents are
distinct since they apply to different airplane models. This service
information describes procedures to relocate the aileron, elevator, and
rudder hydraulic accumulators aft and outboard of their current
locations.
Bombardier Canadair 215 Service Bulletin 215-557, Revision
1, dated June 27, 2014; Bombardier Canadair 215T Service Bulletin 215-
3182, Revision 1, dated June 27, 2014; and Bombardier 415 Service
Bulletin 215-4470, Revision 1, dated June 27, 2014. These documents are
distinct since they apply to different airplane models. This service
information provides procedures to establish the number of flight hours
for each accumulator and determine if it has been used on another type
of aircraft.
Bombardier Model CL-215-1A10 (CL-215), Time Limits/
Maintenance Checks (TLMC) Manual PSP 295, TR 295-7, dated December 13,
2013; Bombardier Model CL-215-6B11 (CL-215T), TLMC Manual PSP 395, TR
LLC-3, dated December 13, 2013; Bombardier Model CL-215-6B11 (CL-215T),
TLMC Manual PSP 395-1, TR LLC-1, dated December 13, 2013; and
Bombardier Model CL-600-6B11 (CL-415), TLMC Manual PSP 495, TR 5-56,
dated December 13, 2013. These documents are distinct since they apply
to different airplane models. This service information provides a
10,000-hour accumulator life limitation for certain accumulators.
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.
FAA's Determination and Requirements of This Proposed AD
This product has been approved by the aviation authority of another
country, and is approved for operation in the United States. Pursuant
to our bilateral agreement with the State of Design Authority, we have
been notified of the unsafe condition described in the MCAI and service
information referenced above. We are proposing this AD because we
evaluated all pertinent information and determined an unsafe condition
exists and is likely to exist or develop on other products of these
same type designs.
Costs of Compliance
We estimate that this proposed AD affects 7 airplanes of U.S. registry.
We estimate the following costs to comply with this proposed AD:
Estimated Costs
| Action |
Labor cost |
Parts cost
|
Cost per
product
|
Cost on
U.S. operators
|
| Ultrasonic inspection [retained
action from AD 2011-03-08] |
7 work-hours x $85 per hour =
$595 |
$0
|
$595
|
$4,165
|
| Relocation, determination of
accumulator hours and usage, and maintenance or inspection program
revision [new proposed action] |
56 work-hours x $85 per hour
= $4,760 |
0
|
4,760
|
33,320
|
We estimate the following costs to
do any necessary replacement
that would be required based on the results of the proposed inspection.
We have no way of determining the number of airplanes that might need
this replacement.
On-Condition Costs
| Action |
Labor cost |
Parts cost
|
Cost per
product
|
| Replacement of cracked part [retained
actions from AD 2011-03-08] |
6 work-hours x $85 per hour =
$510 |
$4,055
|
$4,565
|
According to the manufacturer, some
of the costs of this proposed
AD may be covered under warranty, thereby reducing the cost impact on
affected individuals. We do not control warranty coverage for affected
individuals. As a result, we have included all costs in our 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.
We are 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
We determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would 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 this proposed
regulation:
1. Is not a "significant regulatory action" under Executive Order
12866;
2. Is not a "significant rule" under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979);
3. Will not affect intrastate aviation in Alaska; and
4. 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 Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 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 removing Airworthiness Directive (AD)
2011-03-08, Amendment 39-16592 (76 FR 6536, February 7, 2011) ("AD
2011-03-08"), and adding the following new AD:
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