Airworthiness Directives; Bombardier, Inc. Airplanes, 36407-36411 [2013-13524]

Agencies

• Federal Aviation Administration
• DEPARTMENT OF TRANSPORTATION

[Federal Register Volume 78, Number 117 (Tuesday, June 18, 2013)]
[Rules and Regulations]
[Pages 36407-36411]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-13524]



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Federal Register / Vol. 78, No. 117 / Tuesday, June 18, 2013 / Rules 
and Regulations

[[Page 36407]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2012-0420; Directorate Identifier 2011-NM-284-AD; 
Amendment 39-17315; AD 2013-01-01]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: We are superseding an existing airworthiness directive (AD) 
for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 
& 440) airplanes. That AD currently requires revising the airplane 
flight manual, deactivating and removing certain hydraulic 
accumulators, inspecting for cracks on accumulators and screw caps, and 
replacing certain accumulators. For certain airplanes, this new AD 
reduces the compliance time for a certain replacement. This AD was 
prompted by reports of on-ground hydraulic accumulator screw cap/end 
cap failure. We are issuing this AD to detect and correct hydraulic 
accumulator screw cap/end cap failure, which could result in the loss 
of the associated hydraulic system and high-energy impact damage to 
adjacent systems and structure, and consequent loss of control of the 
airplane.

DATES: This AD becomes effective July 23, 2013.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of July 23, 
2013.
    The Director of the Federal Register approved the incorporation by 
reference of certain other publications listed in this AD as of 
December 22, 2011 (76 FR 71241, November 17, 2011).
    The Director of the Federal Register approved the incorporation by 
reference of certain other publications listed in this AD as of 
November 4, 2010 (75 FR 64636, October 20, 2010).

ADDRESSES: You may examine the AD docket on the Internet at https://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: Cesar Gomez, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury, 
New York 11590; telephone (516) 228-7318; 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 19, 2012 (77 
FR 23420), and proposed to supersede AD 2011-23-08, Amendment 39-16859 
(76 FR 71241, November 17, 2011), which superseded AD 2010-22-02, 
Amendment 39-16481 (75 FR 64636, October 20, 2010). That NPRM proposed 
to correct an unsafe condition for the specified products. Transport 
Canada Civil Aviation, which is the aviation authority for Canada, has 
issued Canadian Airworthiness Directive CF-2010-24, dated August 3, 
2010 (referred to after this as the Mandatory Continuing Airworthiness 
Information, or ``the MCAI''), to correct an unsafe condition for the 
specified products. The MCAI states:

    Seven cases of on-ground hydraulic accumulator screw cap/end cap 
failure have been experienced on CL-600-2B19 aeroplanes, resulting 
in the 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.
    The part numbers (P/N) of the accumulators currently installed 
on CL-600-2B19 aeroplanes are 601R75138-1 (08-60163-001 or 08-60163-
002) [Hydraulic System No. 1, Hydraulic System No. 2, Inboard Brake 
and Outboard Brake accumulators] and 601R75138-3 (08-60164-001 or 
08-60164-002) [Hydraulic System No. 3 accumulator].
    A detailed analysis of the calculated line of trajectory of a 
failed screw cap/end cap for each of the accumulators has been 
conducted, resulting in the identification of several areas where 
systems and/or structural components could potentially be damaged. 
Although all of the failures to date have occurred on the ground, an 
in-flight failure affecting such components could potentially have 
an adverse effect on the controllability of the aeroplane.
    This [Canadian] directive gives instructions to amend the 
Airplane Flight Manual (AFM), remove two accumulators (Hydraulic 
System No. 2 and No. 3) from the aeroplane and conduct repetitive 
ultrasonic inspections [for cracks] of the Hydraulic System No. 1, 
Inboard Brake and Outboard Brake accumulators that are not 
identified by the letter ``T'' after the serial number (S/N) on the 
identification plate for cracks until they are replaced by new 
accumulators P/N 601R75139-1 (11093-4).
* * * * *

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comments received.

Request To Remove Compliance Time

    Comair, Inc. requested that we remove paragraph (n)(2) from the 
NPRM (77 FR 23420, April 19, 2012). The commenter stated its 
understanding that the main reason for the change to paragraph (n) of 
the NPRM is to add paragraph (n)(2) with the intent to reduce the 
compliance schedule. However, Comair, Inc. reasoned that, based on the 
timeline for issuance of a final rule, the 60-day compliance time that 
was added to paragraph (n)(2) of the NPRM will likely extend the 
compliance time by three or more months beyond the existing compliance 
time for that required action (which is required by AD 2011-23-08, 
Amendment 39-16859 (76 FR 71241, November 17, 2011)), instead of 
reducing the compliance time.
    We disagree with the request to remove paragraph (n)(2) of the NPRM 
(77 FR 23420, April 19, 2012) from the final rule. Paragraph (n) of 
this AD indicates that the required action must be done at the later of 
the times in paragraphs (n)(1) and (n)(2) of this AD. Paragraph (n)(1) 
of this AD includes the phrase, ``whichever occurs first,'' which 
requires operators to perform the action at the earlier of the times 
specified in

[[Page 36408]]

that paragraph. Those times are tied to the effective date of AD 2011-
23-08, Amendment 39-16859 (76 FR 71241, November 17, 2011), and are 
restated from that AD. Therefore, we added paragraph (n)(2) in the NPRM 
as a grace period for operators that may already have exceeded the 
compliance time in paragraph (n)(1) of this AD.
    We find that the reduced compliance time is necessary to address 
the identified unsafe condition in a timely manner, and that a grace 
period is necessary to prevent unintentionally grounding airplanes. We 
have not changed the final rule in this regard.

Request To Revise Paragraph (l) of the NPRM (77 FR 23420, April 19, 
2012)

    Comair, Inc. requested that we revise paragraph (l) of the NPRM (77 
FR 23420, April 19, 2012) to remove the phrase, ``with reduced 
compliance time for paragraph (n).'' Comair, Inc. considered this 
phrase to be an error and requested that further explanation be 
provided if the phrase is intended to be included.
    We agree with the commenter's request. We note that both paragraphs 
(l) and (m) of the NPRM (77 FR 23420, April 19, 2012) contained similar 
phrases. However, since no reference to a reduced compliance time 
should be included in those paragraphs, we have deleted the phrases 
from both paragraphs (l) and (m) of this final rule.

Request To Remove References to a Certain AD

    Air Wisconsin Airlines Corporation (Air Wisconsin) requested that 
we revise the NPRM (77 FR 23420, April 19, 2012) to remove certain AD 
references specified in paragraphs (g), (h), (i), (j), and (k) of the 
NPRM. Air Wisconsin stated that those paragraphs incorrectly refer to a 
previously superseded AD (AD 2010-22-02, Amendment 39-16481 (75 FR 
64636, October 20, 2010)), and should instead be replaced with the most 
recent AD being superseded (that is, AD 2011-23-08, Amendment 39-16859 
(76 FR 71241, November 17, 2011)).
    We partially agree with the commenter's request. We revised the 
introductory statement of paragraphs (g), (h), (i), (j), and (k) of 
this final rule to specify that the requirements of those paragraphs 
are restated from AD 2011-23-08, Amendment 39-16859 (76 FR 71241, 
November 17, 2011).
    However, we have not changed the compliance times specified (or 
referenced) in paragraphs (g), (h), (i), (j), and (k) of this AD. The 
actions required by those paragraphs were required in AD 2010-22-02, 
Amendment 39-16481 (75 FR 64636, October 20, 2010), and the compliance 
times for those actions are based on the effective date of that AD. 
Those restated compliance times have not been changed in this final 
rule.

Request To Clarify Service Information Reference

    Air Wisconsin requested that we revise paragraphs (h) and (i) of 
the NPRM (77 FR 23420, April 19, 2012) to clarify the added reference 
to revised service information. The commenter noted that those 
paragraphs state there is revised service information. Air Wisconsin 
questioned whether the revised service information is from AD 2010-22-
02, Amendment 39-16481 (75 FR 64636, October 20, 2010); or AD 2011-23-
08, Amendment 39-16859 (76 FR 71241, November 17, 2011).
    We agree that clarification is necessary. We inadvertently 
specified that revised service information is included in paragraphs 
(h) and (i) of the NPRM (76 FR 71241, November 17, 2011), when, in 
fact, no revised service information was included. Therefore, we have 
removed those references from paragraphs (h) and (i) of this final 
rule.

Request To Include the Latest Temporary Revision (TR)

    Air Wisconsin requested that we revise the NPRM (77 FR 23420, April 
19, 2012) to include the latest TR to the Canadair Regional Jet AFM, 
CSP A-012. The commenter noted that paragraph (g) of the NPRM pertains 
to Canadair Regional Jet TR RJ/186-1, dated August 24, 2010. Air 
Wisconsin requested that we add Canadair Regional Jet TR RJ/186-2, 
dated July 7, 2011, as an approved method.
    We agree with the commenter's request, and have included Canadair 
Regional Jet TR RJ/186-2, dated July 7, 2011, in paragraph (g) of this 
final rule and in Note 1 to paragraph (g) of this final rule.

Explanation of Changes Made to This AD

    We have removed tables 1, 2, 3, 4, and 5 of this final rule. 
Instead, we have included the information from those tables in the 
subparagraphs of paragraphs (j)(1), (j)(2), (m), and (o)(3) of this 
final rule.

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--except for minor 
editorial changes. We have determined that these changes:
     Are consistent with the intent that was proposed in the 
NPRM (77 FR 23420, April 19, 2012) for correcting the unsafe condition; 
and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM (77 FR 23420, April 19, 2012).

Costs of Compliance

    We estimate that this AD will affect about 605 products of U.S. 
registry.
    The actions that are required by AD 2011-23-08, Amendment 39-16859 
(76 FR 71241, November 17, 2011), and retained in this AD take about 33 
work-hours per product, at an average labor rate of $85 per work-hour. 
Required parts cost about $3,054 per product. Based on these figures, 
the estimated cost of the currently required actions is $5,859 per 
product.
    The new requirements of this AD add no additional economic burden.

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 that 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);
    3. Will not affect intrastate aviation in Alaska; and
    4. Will not have a significant economic impact, positive or 
negative,

[[Page 36409]]

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 https://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 this 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.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of 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

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 removing airworthiness directive (AD) 
2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 2011), and 
adding the following new AD:

2013-01-01 Bombardier, Inc.: Amendment 39-17315. Docket No. FAA-
2012-0420; Directorate Identifier 2011-NM-284-AD.

(a) Effective Date

    This airworthiness directive (AD) becomes effective July 23, 
2013.

(b) Affected ADs

    This AD supersedes AD 2011-23-08, Amendment 39-16859 (76 FR 
71241, November 17, 2011).

(c) Applicability

    This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional 
Jet Series 100 & 440) airplanes, certificated in any category, 
serial numbers 7003 and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 29, Hydraulic 
Power; 32, Landing Gear.

(e) Reason

    This AD was prompted by reports of on-ground hydraulic 
accumulator screw cap/end cap failure. We are issuing this AD to 
detect and correct hydraulic accumulator screw cap/end cap failure, 
which could result in the loss of the associated hydraulic system 
and high-energy impact damage to adjacent systems and structure, and 
consequent loss of control of the airplane.

(f) Compliance

    You are responsible for having the actions required by this AD 
performed within the compliance times specified, unless the actions 
have already been done.

(g) Retained Airplane Flight Manual (AFM) Revision, With Revised 
Service Information

    This paragraph restates the AFM revision required by paragraph 
(g) of AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 
2011), with revised service information. Within 30 days after 
November 4, 2010 (the effective date of AD 2010-22-02, Amendment 39-
16481 (75 FR 64636, October 20, 2010)), revise the Limitations 
section, Normal Procedures section, and Abnormal Procedures section 
of the Canadair Regional Jet AFM, CSP A-012, by incorporating 
Canadair Regional Jet Temporary Revision (TR) RJ/186-1, dated August 
24, 2010; or Canadair Regional Jet TR RJ/186-2, dated July 7, 2011; 
into the applicable section of Canadair Regional Jet AFM, CSP A-012. 
Thereafter, except as provided by paragraph (p) of this AD, no 
alternative actions specified in Canadair Regional Jet TR RJ/186-1, 
dated August 24, 2010; or Canadair Regional Jet TR RJ/186-2, dated 
July 7, 2011; may be approved.

    Note 1 to paragraph (g) of this AD: The actions required by 
paragraph (g) of this AD may be done by inserting a copy of Canadair 
Regional Jet TR RJ/186-1, dated August 24, 2010; or Canadair 
Regional Jet TR RJ/186-2, dated July 7, 2011; into the applicable 
section of the Canadair Regional Jet AFM, CSP A-012. When one of 
these TRs has been included in the general revisions of this AFM, 
the general revisions may be inserted into this AFM, and the TR 
removed, provided that the relevant information in the general 
revision is identical to that in Canadair Regional Jet TR RJ/186-1, 
dated August 24, 2010; or Canadair Regional Jet TR RJ/186-2, dated 
July 7, 2011.

(h) Retained Deactivation of the Hydraulic System No. 3 Accumulator

    This paragraph restates the deactivation required by paragraph 
(h) of AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 
2011). Within 250 flight cycles after November 4, 2010 (the 
effective date of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, 
October 20, 2010)), deactivate the hydraulic system No. 3 
accumulator, in accordance with Part A of the Accomplishment 
Instructions of Bombardier Alert Service Bulletin A601R-29-031, 
Revision A, dated March 26, 2009. Doing the removal of the hydraulic 
system No. 3 accumulator in paragraph (l) of this AD terminates the 
requirements of this paragraph. The actions in this paragraph apply 
to all accumulators in hydraulic system No. 3.

(i) Retained Removal of the Hydraulic System No. 2 Accumulator

    This paragraph restates the removal required by paragraph (i) of 
AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 2011). 
Within 500 flight cycles after November 4, 2010 (the effective date 
of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, October 20, 
2010)), remove the hydraulic system No. 2 accumulator, in accordance 
with the Accomplishment Instructions of Bombardier Service Bulletin 
601R-29-032, Revision A, dated January 26, 2010. The actions in this 
paragraph apply to all accumulators in hydraulic system No. 2.

(j) Retained Initial and Repetitive Ultrasonic Inspections of Hydraulic 
System No. 1, Inboard Brake and Outboard Brake Accumulators, With 
Revised Service Information

    This paragraph restates the initial and repetitive ultrasonic 
inspections required by paragraph (j) of AD 2011-23-08, Amendment 
39-16859 (76 FR 71241, November 17, 2011), with revised service 
information. For hydraulic system No. 1, inboard brake and outboard 
brake accumulators having part number (P/N) 601R75138-1 (08-60163-
001 or 08-60163-002): At the applicable compliance times specified 
in paragraph (k) of this AD, do the inspections required by 
paragraphs (j)(1) and (j)(2) of this AD. Repeat the inspections for 
each accumulator having P/N 601R75138-1 (08-60163-001 or 08-60163-
002) thereafter at intervals not to exceed 500 flight cycles until 
the replacement specified in this paragraph is done, or the 
replacement specified in paragraph (m) of this AD is done. If any 
crack is found, before further flight, replace the accumulator with 
a new accumulator having P/N 601R75138-1 (08-60163-001 or 08-60163-
002) and having the letter ``T'' after the serial number on the 
identification plate, in accordance with the Accomplishment 
Instructions of the applicable service bulletin specified in 
paragraphs (j)(1)(i), (j)(1)(ii), (j)(2)(i), and (j)(2)(ii) of this 
AD.

    Note 2 to paragraph (j) of this AD: For any accumulator having 
P/N 601R75138-1 (08-60163-001 or 08-60163-002) and the letter ``T'' 
after the serial number on the identification plate, or for any 
accumulator having a part number that is not listed in paragraph (j) 
of this AD, the inspection specified in paragraph (j) of this AD is 
not required.

    (1) Do an ultrasonic inspection for cracks on each accumulator, 
in accordance with Part B of the Accomplishment Instructions of the 
applicable service bulletin specified in paragraphs (j)(1)(i) and 
(j)(1)(ii) of this AD.
    (i) For the hydraulic system No. 1 accumulator: Bombardier Alert 
Service Bulletin A601R-29-029, Revision B, dated May 11, 2010, 
including Appendix A, dated October 18, 2007.
    (ii) For the inboard and outboard brake accumulators: Bombardier 
Alert Service Bulletin A601R-32-103, Revision D, dated May 11, 2010, 
including Appendix A, Revision A, dated October 18, 2007.
    (2) Do an ultrasonic inspection for cracks on the screw cap, in 
accordance with the Accomplishment Instructions of the

[[Page 36410]]

applicable service specified in paragraphs (j)(2)(i) and (j)(2)(ii) 
of this AD.
    (i) For the hydraulic system No. 1 accumulator: Bombardier 
Service Bulletin 601R-29-033, Revision A, dated May 11, 2010, 
including Appendix A, dated May 5, 2009.
    (ii) For the inboard and outboard brake accumulators: Bombardier 
Service Bulletin 601R-32-106, including Appendix A, Revision A, 
dated May 11, 2010.

(k) Retained Compliance Times for the Ultrasonic Inspections of 
Hydraulic System No. 1, Inboard Brake and Outboard Brake Accumulators

    This paragraph restates the compliance times required by 
paragraph (k) of AD 2011-23-08, Amendment 39-16859 (76 FR 71241, 
November 17, 2011). For hydraulic system No. 1 inboard brake, and 
outboard brake accumulators having P/N 601R75138-1 (08-60163-001 or 
08-60163-002): Do the inspections specified in paragraph (j) of this 
AD at the applicable time in paragraphs (k)(1), (k)(2), and (k)(3) 
of this AD.
    (1) For any accumulator not having the letter ``T'' after the 
serial number on the identification plate and with more than 4,500 
flight cycles on the accumulator as of November 4, 2010 (the 
effective date of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, 
October 20, 2010)): Inspect within 500 flight cycles after November 
4, 2010 (the effective date of AD 2010-22-02).
    (2) For any accumulator not having the letter ``T'' after the 
serial number on the identification plate and with 4,500 flight 
cycles or less on the accumulator as of November 4, 2010 (the 
effective date of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, 
October 20, 2010)): Inspect prior to the accumulation of 5,000 
flight cycles on the accumulator.
    (3) If it is not possible to determine the flight cycles 
accumulated for any accumulator not having the letter ``T'' after 
the serial number on the identification plate: Inspect within 500 
flight cycles after November 4, 2010 (the effective date of AD 2010-
22-02, Amendment 39-16481 (75 FR 64636, October 20, 2010)).

(l) Retained Removal of the Hydraulic System No. 3 Accumulator

    This paragraph restates the removal required by paragraph (o) of 
AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 2011). 
Within 1,000 flight cycles after December 22, 2011 (the effective 
date of AD 2011-23-08), remove the hydraulic system No. 3 
accumulator, in accordance with Part B of the Accomplishment 
Instructions of Bombardier Alert Service Bulletin A601R-29-031, 
Revision A, dated March 26, 2009. Doing the action in this paragraph 
terminates the requirements of paragraph (h) of this AD.

(m) Retained Replacement of the Hydraulic System No. 1, Inboard Brake 
and Outboard Brake Accumulators

    This paragraph restates the replacement required by paragraph 
(p) of AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 
2011). Within 4,000 flight cycles or 24 months after December 22, 
2011 (the effective date of AD 2011-23-08), whichever occurs first, 
replace any hydraulic system No. 1, inboard brake or outboard brake 
accumulator having P/N 601R75138-1 (08-60163-001 or 08-60163-002), 
with a new accumulator having P/N 601R75139-1 (11093-4), in 
accordance with the Accomplishment Instructions of the applicable 
service bulletin identified in paragraphs (m)(1) through (m)(4) of 
this AD. Doing the action in this paragraph terminates the 
requirement for the inspections in paragraph (j) of this AD for that 
accumulator. As of December 22, 2011 (the effective date of AD 2011-
23-08), use only the applicable service bulletin specified in 
paragraph (m)(2) or (m)(4) of this AD.
    (1) For the hydraulic system No. 1 accumulator: Bombardier 
Service Bulletin 601R-29-035, dated May 11, 2010.
    (2) For the hydraulic system No. 1 accumulator: Bombardier 
Service Bulletin 601R-29-035, Revision A, dated December 8, 2010.
    (3) For the inboard and outboard brake accumulators: Bombardier 
Service Bulletin 601R-32-107, Revision A, dated June 17, 2010.
    (4) For the inboard and outboard brake accumulators: Bombardier 
Service Bulletin 601R-32-107, Revision B, dated December 8, 2010.

(n) Retained Action for Airplanes on Which Bombardier Service Bulletin 
601R-29-035, Dated May 11, 2010, Is Done and Reducer Having P/N 
MS21916D8-6 is Installed, With Revised Compliance Time

    This paragraph restates the action required by paragraph (q) of 
AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 2011), 
with reduced compliance time. For airplanes on which Bombardier 
Service Bulletin 601R-29-035, dated May 11, 2010, is done, and on 
which a reducer having P/N MS21916D8-6 is installed: At the later of 
the times specified in paragraphs (n)(1) and (n)(2) of this AD, 
replace the reducer of the hydraulic system No. 1 with a new 
reducer, in accordance with Part B of the Accomplishment 
Instructions of Bombardier Service Bulletin 601R-29-035, Revision A, 
dated December 8, 2010.
    (1) Within 1,200 flight cycles or 8 months after December 22, 
2011 (the effective date of AD 2011-23-08, Amendment 39-16859 (76 FR 
71241, November 17, 2011)), whichever occurs first.
    (2) Within 60 days after the effective date of this AD.

(o) Retained Credit for Previous Actions

    (1) This paragraph provides credit for deactivating the 
hydraulic system No. 3 accumulator required by paragraph (h) of this 
AD, if the deactivation was performed before November 4, 2010 (the 
effective date of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, 
October 20, 2010)), using Bombardier Alert Service Bulletin A601R-
29-031, dated December 23, 2008, which is not incorporated by 
reference in this AD.
    (2) This paragraph provides credit for removing the hydraulic 
system No. 2 accumulator required by paragraph (i) of this AD, if 
the removal was performed before November 4, 2010 (the effective 
date of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, October 20, 
2010)), using Bombardier Service Bulletin 601R-29-032, dated 
November 12, 2009, which is not incorporated by reference in this 
AD.
    (3) This paragraph provides credit for an ultrasonic inspection 
for cracks required by paragraph (j) of this AD, if the ultrasonic 
inspection was performed before November 4, 2010 (the effective date 
of AD 2010-22-02, Amendment 39-16481 (75 FR 64636, October 20, 
2010)), using the applicable service bulletin identified in 
paragraphs (o)(3)(i) through (o)(3)(viii) of this AD; as applicable; 
which are not incorporated by reference in this AD.
    (i) Bombardier Alert Service Bulletin A601R-29-029, dated 
October 18, 2007.
    (ii) Bombardier Alert Service Bulletin A601R-29-029, Revision A, 
dated November 12, 2009.
    (iii) Bombardier Alert Service Bulletin A601R-32-103, dated 
November 21, 2006.
    (iv) Bombardier Alert Service Bulletin A601R-32-103, Revision A, 
dated March 7, 2007.
    (v) Bombardier Alert Service Bulletin A601R-32-103, Revision B, 
dated October 18, 2007.
    (vi) Bombardier Alert Service Bulletin A601R-32-103, Revision C, 
dated February 26, 2009.
    (vii) Bombardier Service Bulletin 601R-29-033, dated May 5, 
2009.
    (viii) Bombardier Service Bulletin 601R-32-106, dated May 5, 
2009.
    (4) This paragraph provides credit for removing the hydraulic 
system No. 3 accumulator required by paragraph (l) of this AD, if 
the removal was performed before December 22, 2011 (the effective 
date of AD 2011-23-08, Amendment 39-16859 (76 FR 71241, November 17, 
2011)), using Bombardier Alert Service Bulletin A601R-29-031, dated 
December 23, 2008, which is not incorporated by reference in this 
AD.
    (5) This paragraph provides credit for replacing any inboard 
brake or outboard brake accumulator required by paragraph (m) of 
this AD, if the replacement was performed before December 22, 2011 
(the effective date of AD 2011-23-08, Amendment 39-16859 (76 FR 
71241, November 17, 2011)), using Bombardier Service Bulletin 601R-
32-107, dated May 11, 2010, which is not incorporated by reference 
in this AD.

(p) Other FAA AD Provisions

    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. 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 ACO, send it 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,

[[Page 36411]]

notify your appropriate principal inspector, or lacking a principal 
inspector, the manager of the local flight standards district 
office/certificate holding district office. The AMOC approval letter 
must specifically reference this AD.
    (i) AMOCs approved previously in accordance with AD 2010-22-02, 
Amendment 39-16481 (75 FR 64636, October 20, 2010), are approved as 
AMOCs for the corresponding provisions of this AD.
    (ii) AMOCs approved previously in accordance with AD 2011-23-08, 
Amendment 39-16859 (76 FR 71241, November 17, 2011), are approved as 
AMOCs for the corresponding provisions of 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.

(q) Related Information

    Refer to MCAI Canadian Airworthiness Directive CF-2010-24, dated 
August 3, 2010, and the service bulletins specified in paragraphs 
(q)(1) through (q)(12) of this AD, for related information.
    (1) Bombardier Alert Service Bulletin A601R-29-029, Revision B, 
dated May 11, 2010, including Appendix A, dated October 18, 2007.
    (2) Bombardier Alert Service Bulletin A601R-29-031, Revision A, 
dated March 26, 2009.
    (3) Bombardier Alert Service Bulletin A601R-32-103, Revision D, 
dated May 11, 2010, including Appendix A, Revision A, dated October 
18, 2007.
    (4) Bombardier Service Bulletin 601R-29-032, Revision A, dated 
January 26, 2010.
    (5) Bombardier Service Bulletin 601R-29-033, Revision A, dated 
May 11, 2010, including Appendix A, dated May 5, 2009.
    (6) Bombardier Service Bulletin 601R-29-035, dated May 11, 2010.
    (7) Bombardier Service Bulletin 601R-29-035, Revision A, dated 
December 8, 2010.
    (8) Bombardier Service Bulletin 601R-32-106, Revision A, 
including Appendix A, dated May 11, 2010.
    (9) Bombardier Service Bulletin 601R-32-107, Revision B, dated 
December 8, 2010.
    (10) Bombardier Service Bulletin 601R-32-107, Revision A, dated 
June 17, 2010.
    (11) Canadair Regional Jet Temporary Revision RJ/186-1, dated 
August 24, 2010, to the Canadair Regional Jet Airplane Flight 
Manual, CSP A-012.
    (12) Canadair Regional Jet TR RJ/186-2, dated July 7, 2011 to 
the Canadair Regional Jet Airplane Flight Manual, CSP A-012.

(r) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
July 23, 2013.
    (i) Canadair Regional Jet TR RJ/186-2, dated July 7, 2011, to 
the Canadair Regional Jet Airplane Flight Manual, CSP A-012.
    (ii) Reserved.
    (4) The following service information was approved for IBR on 
December 22, 2011 (76 FR 71241, November 17, 2011)).
    (i) Bombardier Service Bulletin 601R-29-035, Revision A, dated 
December 8, 2010.
    (ii) Bombardier Service Bulletin 601R-32-107, Revision B, dated 
December 8, 2010.
    (5) The following service information was approved for IBR on 
November 4, 2010 (75 FR 64636, October 20, 2010).
    (i) Bombardier Alert Service Bulletin A601R-29-029, Revision B, 
dated May 11, 2010, including Appendix A, dated October 18, 2007.

    Note 3 to paragraphs (r)(5)(i), (r)(5)(iii), (r)(5)(v), and 
(r)(5)(vii) of this AD: In Appendix A to these documents, the 
document number is shown only on page A1 of these appendices.

    (ii) Bombardier Alert Service Bulletin A601R-29-031, Revision A, 
dated March 26, 2009.
    (iii) Bombardier Alert Service Bulletin A601R-32-103, Revision 
D, dated May 11, 2010, including Appendix A, Revision A, dated 
October 18, 2007.
    (iv) Bombardier Service Bulletin 601R-29-032, Revision A, dated 
January 26, 2010.
    (v) Bombardier Service Bulletin 601R-29-033, Revision A, dated 
May 11, 2010, including Appendix A, dated May 5, 2009.
    (vi) Bombardier Service Bulletin 601R 29 035, dated May 11, 
2010.
    (vii) Bombardier Service Bulletin 601R-32-106, Revision A, 
including Appendix A, dated May 11, 2010.
    (viii) Bombardier Service Bulletin 601R-32-107, Revision A, 
dated June 17, 2010.
    (ix) Canadair Regional Jet Temporary Revision RJ/186-1, dated 
August 24, 2010, to the Canadair Regional Jet Airplane Flight 
Manual, CSP A-012.
    (6) 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; email thd.crj@aero.bombardier.com; Internet https://www.bombardier.com.
    (7) You may review copies of the 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.
    (8) You may view this 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: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Renton, Washington, on December 28, 2012.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2013-13524 Filed 6-17-13; 8:45 am]
BILLING CODE 4910-13-P