[Federal Register Volume 75, Number 186 (Monday, September 27, 2010)]
[Rules and Regulations]
[Pages 59073-59076]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2010-23838]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2010-0375; Directorate Identifier 2010-NM-014-AD;
Amendment 39-16443; AD 2010-20-09]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc. Model CL-600-2B19
(Regional Jet Series 100 & 440) Airplanes; Model CL-600-2C10 (Regional
Jet Series 700, 701, & 702) Airplanes; Model CL-600-2D15 (Regional Jet
Series 705) and Model CL-600-2D24 (Regional Jet Series 900) 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:
Following five reported cases of balance washer screw failure on
similar ADGs [air-driven generators]/ram air turbines installed on
other aircraft types, investigation by Hamilton Sundstrand
determined that a specific batch of the screws had a metallographic
non-conformity that increased their susceptibility to brittle
fracture. * * *
Failure of a balance washer screw can result in loss of the
related balance washer,
[[Page 59074]]
with consequent turbine imbalance. Such imbalance could potentially
result in ADG structural failure (including blade failure), loss of
ADG electrical power and structural damage to the aircraft and, if
deployment was activated by a dual engine shutdown, could also
result in loss of hydraulic power for the flight controls.
* * * * *
The unsafe condition is the reduced ability of the flightcrew to
maintain the safe flight and landing of the airplane. We are issuing
this AD to require actions to correct the unsafe condition on these
products.
DATES: This AD becomes effective November 1, 2010.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of November 1,
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 April 8, 2010 (75 FR
17884). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states:
Following five reported cases of balance washer screw failure on
similar ADGs [air-driven generators]/ram air turbines installed on
other aircraft types, investigation by Hamilton Sundstrand
determined that a specific batch of the screws had a metallographic
non-conformity that increased their susceptibility to brittle
fracture. Subsequently, it was established that 152 ``dry'' ADGs
[Hamilton Sundstrand Part Numbers (P/Ns) in the 761339 series and
1711405; see Note] either had non-conforming screws installed during
production or may possibly have had non-conforming screws installed
during maintenance or repair at Hamilton Sundstrand repair stations.
Failure of a balance washer screw can result in loss of the
related balance washer, with consequent turbine imbalance. Such
imbalance could potentially result in ADG structural failure
(including blade failure), loss of ADG electrical power and
structural damage to the aircraft and, if deployment was activated
by a dual engine shutdown, could also result in loss of hydraulic
power for the flight controls [and consequent reduced ability of the
flightcrew to maintain the safe flight and landing of the airplane].
This [Canadian] directive mandates checking the ADG and
replacing the balance washer screws, if required. It also prohibits
future installation of unmodified ADGs.
Note: ADGs with Hamilton Sundstrand P/Ns in the 761339 series
and 1711405 are installed on the aircraft models listed in the
Applicability section above in addition to Bombardier Inc. Model CL-
600-2B16. The latter model is covered in a separate directive.
The unsafe condition is the reduced ability of the flightcrew to
maintain the safe flight and landing of the airplane. 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 Remove the Phrase ``Before Further Flight'' From Paragraph
(i) of the AD
Comair requests that the phrase ``before further flight'' be
changed from paragraph (i) of the AD. Comair suggests that the intent
of paragraph (i) is that if the air-driven generator (ADG) is deployed
to allow inspection of the data plate for the symbol ``24-5,'' and it
is discovered that there is no symbol ``24-5,'' before further flight
comply with the service bulletin. Comair suggests using the phrase
``within the timeframe determined in (g) or (h).''
We agree with the request to change the wording in paragraph (i) of
this AD. This change does not compromise safety or the intent of the
AD; therefore, we have changed the wording to ``within the applicable
time in paragraph (g) or (h) of this AD.''
Request To Eliminate ``24-5'' Marking on the ADG Identification Plate
Air Wisconsin requests that the ``24-5'' marking on the ADG
identification plate be eliminated from the identification plate. Air
Wisconsin states that it is the operator's record keeping system that
is required to show compliance with the AD, and Air Wisconsin's record
keeping system has been approved to sufficiently ensure AD compliance.
We disagree with the request to remove the ``24-5'' marking on the
ADG identification plate. The ``24-5'' marking on the identification
plate of the affected ADG identifies that the suspect balance washer
screws have been replaced and are in compliance with the AD. No change
has been made to the AD in this regard.
Request for Clarification Regarding Term ``All Airplanes''
Air Wisconsin requests clarification regarding the term ``all
airplanes,'' which is used in Note 1 of the NPRM specifying that the
inspection is to be done on all airplanes.
We agree that clarification is needed. The term ``all airplanes''
refers to the applicable airplane models listed in paragraph (c) of
this AD. It is possible that an affected part could be rotated onto any
of the airplanes listed in the applicability, and the affected part
could be missed unless the inspection specified in paragraph (g) of
this AD applies to all of the airplanes identified in paragraph (c) of
this AD. No change has been made to the AD in this regard.
Request To Reclassify as Appliance AD
Air Wisconsin requests that this AD be classified as an appliance
AD. Air Wisconsin requests that if we cannot reclassify it as an
appliance AD, we include a statement ensuring compliance on all units
in inventory so that affected units are not installed on airplanes.
We disagree with the request to reclassify the AD as an appliance
AD. When the unsafe condition results from the installation of the
appliance on an aircraft, the AD action is issued against the aircraft,
not the appliance. We also disagree with the request to include a
statement ensuring compliance on all units in inventory, because
paragraph (j) of this AD already addresses the issue of installing a
replacement or spare ADG on any airplane. No change has been made to
the AD in this regard.
Clarification of Paragraph (g)
We have clarified the compliance times in paragraph (g) of this AD
by requiring the inspection at the earliest of the times identified in
paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) 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.
[[Page 59075]]
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 1,008 products of U.S.
registry. We also estimate that it will take about 10 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 $0 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 $856,800, or $850 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.
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:
2010-20-09 Bombardier, Inc.: Amendment 39-16443. Docket No. FAA-
2010-0375; Directorate Identifier 2010-NM-014-AD.
Effective Date
(a) This airworthiness directive (AD) becomes effective November
1, 2010.
Affected ADs
(b) None.
Applicability
(c) This AD applies to Bombardier, Inc. Model CL-600-2B19
(Regional Jet Series 100 & 440) airplanes, serial numbers 7305
through 7990 inclusive and 8000 and subsequent; Model CL-600-2C10
(Regional Jet Series 700, 701, & 702) airplanes, serial numbers
10003 and subsequent; Model CL-600-2D15 (Regional Jet Series 705)
and Model CL-600-2D24 (Regional Jet Series 900) airplanes, serial
numbers 15001 and subsequent; certificated in any category.
Subject
(d) Air Transport Association (ATA) of America Code 24:
Electrical power.
Reason
(e) The mandatory continuing airworthiness information (MCAI)
states:
Following five reported cases of balance washer screw failure on
similar ADGs [air-driven generators]/ram air turbines installed on
other aircraft types, investigation by Hamilton Sundstrand
determined that a specific batch of the screws had a metallographic
non-conformity that increased their susceptibility to brittle
fracture. Subsequently, it was established that 152 ``dry'' ADGs
[Hamilton Sundstrand Part Numbers (P/Ns) in the 761339 series and
1711405; see Note] either had non-conforming screws installed during
production or may possibly have had non-conforming screws installed
during maintenance or repair at Hamilton Sundstrand repair stations.
Failure of a balance washer screw can result in loss of the
related balance washer, with consequent turbine imbalance. Such
imbalance could potentially result in ADG structural failure
(including blade failure), loss of ADG electrical power and
structural damage to the aircraft and, if deployment was activated
by a dual engine shutdown, could also result in loss of hydraulic
power for the flight controls.
This [Canadian] directive mandates checking the ADG and
replacing the balance washer screws, if required. It also prohibits
future installation of unmodified ADGs.
Note: ADGs with Hamilton Sundstrand P/Ns in the 761339 series
and 1711405 are installed on the aircraft models listed in the
Applicability section above in addition to Bombardier Inc. Model CL-
600-2B16. The latter model is covered in a separate directive.
The unsafe condition is the reduced ability of the flightcrew to
maintain the safe flight and landing of the airplane.
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) For Model CL-600-2C10, CL-600-2D15 and CL-600-2D24
airplanes: At the earliest of the times identified in paragraphs
(g)(1), (g)(2), (g)(3), and (g)(4) of this AD, do an inspection to
determine the serial number of the installed air-driven generator
(ADG), in accordance with the Accomplishment Instructions of the
applicable service bulletin listed in Table 1 of this AD. A review
of airplane maintenance records is acceptable in
[[Page 59076]]
lieu of this inspection if the serial number of the ADG can be
conclusively identified from that review.
(1) Within 4,000 flight hours or 18 months after the effective
date of this AD, whichever occurs first; or
(2) Prior to the next in-flight or on-ground functional check of
the ADG, whichever occurs first after the effective date of this AD;
or
(3) Prior to the next in-flight or on-ground operational check
of the ADG, whichever occurs first after the effective date of this
AD; or
(4) Before the next scheduled ADG in-flight deployment.
(h) For Model CL-600-2B19 airplanes: At the earliest of the
times identified in paragraphs (h)(1), (h)(2), (h)(3), and (h)(4) of
this AD, do an inspection to determine the serial number of the
installed ADG, in accordance with the Accomplishment Instructions of
the applicable service bulletin listed in Table 1 of this AD. A
review of airplane maintenance records is acceptable in lieu of this
inspection if the part number of the ADG can be conclusively
identified from that review.
(1) Within 4,000 flight hours after the effective date of this
AD; or
(2) Prior to the next in-flight or on-ground functional check of
the ADG, whichever occurs first after the effective date of this AD;
or
(3) Prior to the next in-flight or on-ground operational check
of the ADG, whichever occurs first after the effective date of this
AD; or
(4) Before the next scheduled ADG in-flight deployment.
Table 1--Service Bulletins
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Model-- Bombardier Service Bulletin-- Revision-- Dated--
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CL-600-2B19 airplanes................ 601R-24-127.......................... A................................... February 25, 2010.
CL-600-2C10, CL-600-2D15, and CL-600- 670BA-24-026......................... Original............................ October 23, 2009.
2D24 airplanes.
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(i) If the ADG serial number determined in paragraph (g) or (h)
of this AD is identified in paragraph 1.A. of the applicable service
bulletin listed in Table 1 of this AD, within the applicable time in
paragraph (g) or (h) of this AD do an inspection to determine if the
symbol ``24-5'' is marked on the ADG identification plate. A review
of airplane maintenance records is acceptable in lieu of this
inspection if the symbol ``24-5'' mark can be conclusively
identified from that review.
(1) If the symbol ``24-5'' is marked on the ADG identification
plate, the balance washer screws have already been replaced, and no
further action is required by this paragraph.
(2) If the symbol ``24-5'' is not marked on the ADG
identification plate, before further flight replace all balance
washer screws with new balance washer screws, part number MS24667-
14, and mark the ADG identification plate with symbol ``24-5,'' in
accordance with the Accomplishment Instructions of the applicable
service bulletin listed in Table 1 of this AD.
(j) As of the effective date of this AD, no person may install
on any airplane, a replacement or spare ADG, Hamilton Sundstrand
part number in the 761339 or 1711405 series, having one of the
serial numbers identified in paragraph 1.A. of the applicable
service bulletin identified in Table 1 of this AD, unless the ADG is
identified with the symbol ``24-5'' on the identification plate.
Actions Accomplished According to Previous Issue of Service Bulletin
(k) Inspections accomplished before the effective date of this
AD according to Bombardier Service Bulletin 601R-24-127, dated
October 23, 2009, are considered acceptable for compliance with the
corresponding action specified in this AD.
FAA AD Differences
Note 1: This AD differs from the MCAI and/or service information
as follows: The MCAI specifies to inspect only airplanes having
certain serial numbers that are part of the MCAI applicability.
Because the affected part could be rotated onto any of the airplanes
listed in the applicability, this AD requires the inspection be done
on all airplanes. We have coordinated this with the TCCA.
Other FAA AD Provisions
(l) 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
(m) Refer to MCAI Canadian Airworthiness Directive CF-2009-48,
dated December 14, 2009; and Bombardier Service Bulletins 601R-24-
127, Revision A, dated February 25, 2010, and 670BA-24-026, dated
October 23, 2009; for related information.
Material Incorporated by Reference
(n) You must use Bombardier Service Bulletin 601R-24-127,
Revision A, dated February 25, 2010; or Bombardier Service Bulletin
670BA-24-026, dated October 23, 2009; 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.
Issued in Renton, Washington, on September 15, 2010.
Robert D. Breneman,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 2010-23838 Filed 9-24-10; 8:45 am]
BILLING CODE 4910-13-P