[Federal Register Volume 75, Number 126 (Thursday, July 1, 2010)]
[Rules and Regulations]
[Pages 37994-37997]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-15845]
[[Page 37994]]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0039; Directorate Identifier 2009-NM-239-AD;
Amendment 39-16350; AD 2010-14-05]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. Model CL-600-1A11 (CL-
600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-
604 Variants (Including CL-605 Marketing Variant)) Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Final rule.
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SUMMARY: We are adopting a new airworthiness directive (AD) for the
products listed above. This AD results from mandatory continuing
airworthiness information (MCAI) originated by an aviation authority of
another country to identify and correct an unsafe condition on an
aviation product. The MCAI describes the unsafe condition as:
Seven cases of on-ground hydraulic accumulator screw cap or end
cap failure have been experienced on CL-600-2B19 (CRJ) aircraft,
resulting in loss of the associated hydraulic system and high-energy
impact damage to adjacent systems and structure. * * *
* * * * *
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 been identified that
the worst case scenario would be failure of one of the brake
accumulator screw caps/end caps, resulting in impact damage causing
loss of both hydraulic systems No. 2 and No. 3, with consequent loss
of both braking and nose wheel steering and the potential for a
runway excursion [resulting in damage to the airplane and hazards to
persons or property on the ground].
* * * * *
We are issuing this AD to require actions to correct the unsafe
condition on these products.
DATES: This AD becomes effective August 5, 2010.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of August 5,
2010.
ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC.
FOR FURTHER INFORMATION CONTACT: Christopher Alfano, Aerospace
Engineer, Airframe and Mechanical Systems Branch, ANE-171, FAA, New
York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410,
Westbury, New York 11590; telephone (516) 228-7340; fax (516) 794-5531.
SUPPLEMENTARY INFORMATION:
Discussion
We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to include an AD that would apply to the specified products.
That NPRM was published in the Federal Register on February 12, 2010
(75 FR 6862). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states:
Seven cases of on-ground hydraulic accumulator screw cap or end
cap failure have been experienced on CL-600-2B19 (CRJ) aircraft,
resulting in loss of the associated hydraulic system and high-energy
impact damage to adjacent systems and structure. The lowest number
of flight cycles accumulated at the time of failure, to date, has
been 6991 flight cycles.
Although there have been no failures to date on any CL-600-1A11,
CL-600-2A12 or CL-600-2B16 aircraft, the same accumulators as those
installed on the CL-600-2B19, Part Numbers (P/N) 08-60163-001, 08-
60163-002, 08-60164-001 and 08-60164-002, are installed on some of
the aircraft listed in the Applicability section of this directive.
Notes:
1. Earlier accumulators, P/Ns 2770571-102, 2770571-103, 2770571-
104 and 2770571-105, were installed in production on the following
aircraft: CL-600-1A11 [all Serial Numbers (S/Ns)], CL-600-2A12 (all
S/Ns) and CL-600-2B16 (S/Ns 5001 through 5194 and 5301 through 5524
only). These accumulators do not require inspection or replacement.
However, if any of the accumulators with the above P/Ns have been
replaced in-service by P/Ns 08-60163-001, 08-60163-002, 08-60164-001
and 08-60164-002, these latter accumulators require replacement.
2. The only accumulators ever installed on CL-600-2B16 aircraft,
S/Ns 5525 through 5665 and 5701 and subsequent, are P/Ns 08-60163-
001, 08-60163-002, 08-60164-001 and 08-60164-002; these accumulators
require replacement.
A detailed analysis of the systems and structure in the
potential line of trajectory of a failed screw cap/end cap for each
accumulator, P/Ns 08-60163-001, 08-60163-002, 08-60164-001 and 08-
60164-002, has been conducted. It has been identified that the worst
case scenario would be failure of one of the brake accumulator screw
caps/end caps, resulting in impact damage causing loss of both
hydraulic systems No. 2 and No. 3, with consequent loss of both
braking and nose wheel steering and the potential for a runway
excursion [resulting in damage to the airplane and hazards to
persons or property on the ground].
This directive gives instructions to perform identification and
records checks, where applicable, and replace accumulators, P/Ns 08-
60163-001, 08-60163-002, 08-60164-001 and 08-60164-002, within the
time compliance specified.
You may obtain further information by examining the MCAI in the AD
docket.
Comments
We gave the public the opportunity to participate in developing
this AD. We considered the comments received.
Request to Revise the AD to Allow Replacement of Accumulators With an
Overhauled or Refurbished Unit
Bombardier Aerospace requests that we revise the NPRM to allow
replacement of the accumulator with either a new accumulator with the
same part number, or an overhauled accumulator with the same part
number containing a T-suffix, in accordance with a future revision of
the applicable service bulletin listed in the following table ``Service
Bulletins.'' Bombardier states that Transport Canada Civil Aviation
(TCCA) has been notified of this upcoming change, and a similar request
will be made to revise Canadian Airworthiness Directive CF-2009-39,
dated October 27, 2009.
Service Bulletins
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Bombardier service bulletin-- Revision-- Dated--
------------------------------------------------------------------------
600-0742........................... 01 July 6, 2009.
601-0597........................... 01 July 6, 2009.
604-29-008......................... 01 July 6, 2009.
605-29-001......................... 01 July 6, 2009.
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We agree with the request to revise the AD. Since the NPRM was
issued, Bombardier has issued Revision 02 of the service bulletins, as
specified in Table 1 of this AD. These revised service bulletins allow
for the replacement of the accumulators with an overhauled or
refurbished unit identified by a ``T'' or ``TNA'' suffix. Paragraph (g)
of this AD has been changed accordingly.
Request for Confirmation of Compliance Time
Pittco, Inc., requests confirmation that a calendar or schedule
requirement for the replacement of the system accumulators will not be
added. The commenter states that according to the compliance time in
the proposed AD, airplanes with low flight cycles could take many years
to reach the threshold to replace the accumulator. The
[[Page 37995]]
commenter wants to confirm that this compliance time is acceptable and
will not be changed to a calendar or schedule requirement.
We confirm that accumulator failures are based on flight cycles and
not calendar schedule. The compliance times for this AD are based on a
parameter related to failure of a particular component. In this case
the failure of an accumulator screw cap or end cap is related to the
number of flight cycles. Therefore, this AD includes no calendar or
schedule requirement. No change has been made to the AD in this regard.
Request for Clarification of Compliance Time
Pittco, Inc., requests clarification regarding the manufacturer's
compliance time for replacing the accumulator. The commenter states
that the service bulletin recommends not replacing the accumulator
earlier than at the due cycles.
We agree that clarification is necessary. The manufacturer's
recommendation was based on the availability of parts. According to the
MCAI and this AD, replacement of the accumulators is required
``within'' the applicable number of flight cycles, rather than the
service bulletin's compliance time of replacing the accumulators ``at''
3,750 landings. Operators are permitted to accomplish the requirements
of this AD before the specified compliance time. No change has been
made to the AD in this regard.
Request for Clarification of Inspections in the Original and Revision
01 of Bombardier Service Bulletin 601-0597
Pittco, Inc., requests a change of wording to state that Bombardier
Service Bulletin 601-0597, dated November 10, 2008, specifies an
inspection; and that Bombardier Service Bulletin 601-0597, Revision 01,
dated July 6, 2009, does not specify an inspection, but merely provides
data for replacement of the accumulators. The commenter requests that
stronger language be incorporated to clarify the difference.
We find that clarification is necessary. The actions required by
paragraph (g) of the AD include an inspection, which is not specified
in Revision 01 of the applicable service bulletin specified in Table 2
of this AD, to determine if the airplane has an affected accumulator.
If the airplane has an affected accumulator, it must be replaced within
the specified number of flight cycles. Credit for the previous
accomplishment of the original version of the applicable service
bulletin specified in Table 2 of this AD as noted in paragraph (g)(4)
of the AD, is for the replacement of an accumulator with a new
accumulator having the same part number, which is also acceptable for
compliance with the requirements of paragraph (g)(2) of the AD. An
ultrasonic inspection for cracking, which was specified in the original
version of the applicable service bulletins specified in Table 2 of
this AD, was removed from Revision 01 of these service bulletins, and
is no longer required. No change has been made to the AD in this
regard.
Request for Addition of Equivalent Part Numbers to AD
Pittco, Inc., requests the addition of equivalent part numbers to
the proposed AD. The commenter states that Bombardier and its vendors
use the terms ``specification numbers'' and ``part numbers''
synonymously, which is not consistent with the service bulletins listed
in Table 1 of the NPRM. The commenter states that there are other
identification numbers that are likely to be found during a review of
the maintenance records. The commenter states that the service
bulletins listed in Table 1 of the NPRM have tables that specify
equivalent Bombardier part numbers. The commenter requests that the
equivalent part numbers be added to the AD.
We agree. This AD requires an inspection to determine the part
numbers of the system accumulators that are installed on the airplane.
This AD also states that a review of airplane maintenance records is
acceptable in lieu of this inspection if the part number of the
accumulator can be conclusively determined from that review. The
service bulletins listed in Table 1 of this AD list the equivalent
Bombardier accumulator part numbers to identify the suspect system
accumulators; therefore, we have added those equivalent part numbers in
parentheses in paragraphs (g)(2)(i), (g)(2)(ii), (g)(2)(iii), and
(g)(3) of this AD.
Conclusion
We reviewed the available data, including the comments received,
and determined that air safety and the public interest require adopting
the AD with the changes described previously. We determined that these
changes will not increase the economic burden on any operator or
increase the scope of the AD.
Differences Between This AD and the MCAI or Service Information
We have reviewed the MCAI and related service information and, in
general, agree with their substance. But we might have found it
necessary to use different words from those in the MCAI to ensure the
AD is clear for U.S. operators and is enforceable. In making these
changes, we do not intend to differ substantively from the information
provided in the MCAI and related service information.
We might also have required different actions in this AD from those
in the MCAI in order to follow our FAA policies. Any such differences
are highlighted in a NOTE within the AD.
Costs of Compliance
We estimate that this AD will affect 340 products of U.S. registry.
We also estimate that it will take about 20 work-hours per product to
comply with the basic requirements of this AD. The average labor rate
is $85 per work-hour. Required parts will cost about $7,717 per
product. Where the service information lists required parts costs that
are covered under warranty, we have assumed that there will be no
charge for these parts. As we do not control warranty coverage for
affected parties, some parties may incur costs higher than estimated
here. Based on these figures, we estimate the cost of this AD to the
U.S. operators to be $3,201,780, or $9,417 per product.
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 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.
[[Page 37996]]
For the reasons discussed above, I certify this AD:
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); 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.
We prepared a regulatory evaluation of the estimated costs to
comply with this AD and placed it in the AD docket.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Operations office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains the NPRM, 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
Adoption of the Amendment
0
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 AD:
2010-14-05 Bombardier, Inc.: Amendment 39-16350. Docket No. FAA-
2010-0039; Directorate Identifier 2009-NM-239-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective August
5, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the Bombardier, Inc. airplanes,
certificated in any category, identified in paragraphs (c)(1),
(c)(2), and (c)(3) of this AD.
(1) Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes,
serial numbers 1004 through 1085 inclusive;
(2) Bombardier, Inc. CL-600-2A12 (CL-601) airplanes, serial
numbers 3001 through 3066 inclusive; and
(3) Bombardier, Inc. CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-
604) airplanes, serial numbers 5001 through 5194 inclusive, 5301
through 5665 inclusive, and 5701 and subsequent.
Note 1: Some Model CL-600-2B16 (CL-604) airplanes might be
referred to by the marketing designation CL-605 in the applicable
service bulletins listed in Table 1 of this AD.
Subject
(d) Air Transport Association (ATA) of America Code 29:
Hydraulic power.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
Seven cases of on-ground hydraulic accumulator screw cap or end
cap failure have been experienced on CL-600-2B19 (CRJ) aircraft,
resulting in loss of the associated hydraulic system and high-energy
impact damage to adjacent systems and structure. * * *
* * * * *
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 been identified that
the worst case scenario would be failure of one of the brake
accumulator screw caps/end caps, resulting in impact damage causing
loss of both hydraulic systems No. 2 and No. 3, with consequent loss
of both braking and nose wheel steering and the potential for a
runway excursion [resulting in damage to the airplane and hazards to
persons or property on the ground].
* * * * *
Compliance
(f) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Actions
(g) Do the following actions as applicable.
(1) Within 50 flight hours after the effective date of this AD,
inspect to determine the part numbers of the system accumulators
numbers 1, 2, and 3 and brake accumulators numbers 2 and 3 that are
installed on the airplane. A review of airplane maintenance records
is acceptable in lieu of this inspection if the part number of the
accumulator can be conclusively determined from that review. If all
of the installed accumulators have P/N 2770571-102, 2770571-103,
2770571-104, or 2770571-105, no further action is required by this
AD.
(2) At the applicable time in paragraph (g)(2)(i), (g)(2)(ii),
or (g)(2)(iii) of this AD, replace the accumulator with a new,
overhauled, or refurbished accumulator with the same part number, in
accordance with the Accomplishment Instructions of the applicable
service bulletin listed in Table 1 of this AD.
Table 1--Service Bulletins
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Bombardier
Airplane model-- service Revision-- Dated--
bulletin--
----------------------------------------------------------------------------------------------------------------
CL-600-1A11 (CL-600)................... 600-0742 02 May 10, 2010.
CL-600-2A12 (CL-601), CL-600-2B16 (CL- 601-0597 02 May 10, 2010.
601-3A, CL-601-3R variant).
CL-600-2B16 (CL-604 variant)........... 604-29-008 02 May 10, 2010.
CL-600-2B16 (CL-605)................... 605-29-001 02 May 10, 2010.
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(i) For each accumulator having P/Ns 08-60163-001 (601R75138-
1), 08-60163-002 (601R75138-1), 08-60164-001 (601R75138-3), and 08-
60164-002 (601R75138-3), as applicable, that has accumulated more
than 3,650 total flight cycles as of the effective date of this AD:
Replace the accumulator within 100 flight cycles after the effective
date of this AD.
(ii) For each accumulator having P/N 08-60163-001 (601R75138-1),
08-60163-002 (601R75138-1), 08-60164-001 (601R75138-3), and 08-
60164-002 (601R75138-3), as applicable, that has accumulated 3,650
total flight cycles or fewer as of the effective date of this AD:
Replace the accumulator before the accumulation of 3,750 total
flight cycles on the accumulator.
(iii) For each accumulator having P/N 08-60163-001 (601R75138-
1), 08-60163-002 (601R75138-1), 08-60164-001 (601R75138-3), and 08-
60164-002 (601R75138-3), as applicable, for which it is not possible
to determine the number of flight cycles accumulated: Replace the
accumulator within 100 flight cycles after the effective date of
this AD.
(3) Thereafter, before the accumulation of 3,750 total flight
cycles on any accumulator having P/Ns 08-60163-001 (601R75138-1),
08-60163-002 (601R75138-1), 08-60164-001 (601R75138-3), and 08-
60164-002 (601R75138-3), as applicable, replace the accumulator with
a new, overhauled, or refurbished accumulator having the same part
number, in accordance with the
[[Page 37997]]
Accomplishment Instructions of the applicable service bulletin
listed in Table 1 of this AD.
Note 2: The part numbers in parentheses in paragraphs
(g)(2)(i), (g)(2)(ii), (g)(2)(iii), and (g)(3) of this AD, are
equivalent specification part numbers, as specified in the
applicable service bulletin listed in Table 1 of this AD.
(4) Replacement of an accumulator with a new accumulator having
the same part number is also acceptable for compliance with the
requirements of paragraph (g)(2) of this AD, if done before the
effective date of this AD in accordance with the applicable service
bulletin listed in Table 2 of this AD.
Table 2--Previous Service Bulletins
----------------------------------------------------------------------------------------------------------------
Bombardier
Airplane model-- service Revision-- Dated--
bulletin--
----------------------------------------------------------------------------------------------------------------
CL-600-1A11 (CL-600)............... 600-0742 Original............... November 10, 2008.
CL-600-1A11 (CL-600)............... 600-0742 01..................... July 6, 2009.
CL-600-2A12 (CL-601), CL-600-2B16 601-0597 Original............... November 10, 2008.
(CL-601-3A, CL-601-3R variant).
CL-600-2A12 (CL-601), CL-600-2B16 601-0597 01..................... July 6, 2009.
(CL-601-3A, CL-601-3R variant).
CL-600-2B16 (CL-604 variant)....... 604-29-008 Original............... November 10, 2008.
CL-600-2B16 (CL-604 variant)....... 604-29-008 01..................... July 6, 2009.
CL-600-2B16 (CL-605)............... 605-29-001 Original............... November 10, 2008.
CL-600-2B16 (CL-605)............... 605-29-001 01..................... July 6, 2009.
----------------------------------------------------------------------------------------------------------------
FAA AD Differences
Note 3: This AD differs from the MCAI and/or service
information as follows:
(1) The MCAI specifies that certain airplanes do not need to be
inspected for the part number; however, this AD requires that
inspections be done on all airplanes to determine the part number.
(2) The MCAI specifies to record the number of flight cycles
accumulated on each affected part. This AD does not require that
operators record the number of flight cycles.
Other FAA AD Provisions
(h) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, New
York Aircraft Certification Office (ACO), ANE-170, FAA, has the
authority to approve AMOCs for this AD, if requested using the
procedures found in 14 CFR 39.19. Send information to ATTN: Program
Manager, Continuing Operational Safety, FAA, New York ACO, 1600
Stewart Avenue, Suite 410, Westbury, New York, 11590; telephone 516-
228-7300; fax 516-794-5531. Before using any approved AMOC on any
airplane to which the AMOC applies, notify your principal
maintenance inspector (PMI) or principal avionics inspector (PAI),
as appropriate, or lacking a principal inspector, your local Flight
Standards District Office. The AMOC approval letter must
specifically reference this AD.
(2) Airworthy Product: For any requirement in this AD to obtain
corrective actions from a manufacturer or other source, use these
actions if they are FAA-approved. Corrective actions are considered
FAA-approved if they are approved by the State of Design Authority
(or their delegated agent). You are required to assure the product
is airworthy before it is returned to service.
(3) Reporting Requirements: For any reporting requirement in
this AD, under the provisions of the Paperwork Reduction Act (44
U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has
approved the information collection requirements and has assigned
OMB Control Number 2120-0056.
Related Information
(i) Refer to MCAI Canadian Airworthiness Directive CF-2009-39,
dated October 27, 2009, and the service bulletins listed in Table 1
of this AD, for related information.
Material Incorporated by Reference
(j) You must use the service information contained in Table 3 of
this AD, as applicable, to do the actions required by this AD,
unless the AD specifies otherwise.
(1) The Director of the Federal Register approved the
incorporation by reference of this service information under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) For service information identified in this AD, contact
Bombardier, Inc., 400 C[ocirc]te Vertu Road West, Dorval,
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-
7401; e-mail [email protected]; Internet http://www.bombardier.com.
(3) You may review copies of the service information at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington. For information on the availability of this material at
the FAA, call 425-227-1221.
(4) You may also review copies of the 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, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
Table 3--Material Incorporated by Reference
------------------------------------------------------------------------
Bombardier service bulletin-- Revision-- Dated--
------------------------------------------------------------------------
600-0742........................... 02 May 10, 2010.
601-0597........................... 02 May 10, 2010.
604-29-008......................... 02 May 10, 2010.
605-29-001......................... 02 May 10, 2010.
------------------------------------------------------------------------
Issued in Renton, Washington, on June 17, 2010.
Robert D. Breneman,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-15845 Filed 6-30-10; 8:45 am]
BILLING CODE 4910-13-P