Document ID: FAA-2011-0994-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, and 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) Airplanes
Posted Date: 2011-10-05T04:00Z

[Federal Register Volume 76, Number 193 (Wednesday, October 5, 2011)]
[Proposed Rules]
[Pages 61633-61638]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2011-25571]

[[Page 61633]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2011-0994; Directorate Identifier 2010-NM-143-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Model CL-600-2C10 
(Regional Jet Series 700, 701, & 702), CL-600-2D15 (Regional Jet Series 
705), and CL-600-2D24 (Regional Jet Series 900) Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above that would supersede an existing AD. This 
proposed 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:

    The right-hand inboard main landing gear (MLG) door of a CRJ 700 
departed the aircraft during the landing phase of flight. The door 
damaged the trailing edge flap and punctured the rear fuselage near 
the floor level. The aircraft landed safely. Preliminary 
investigation indicates the failure was initiated by fatigue of the 
panel structure near a panel hinge lug. Loss of the main landing 
gear door during flight could result in damage to the aircraft and 
injury to persons on the ground.
* * * * *
The proposed AD would require actions that are intended to address the 
unsafe condition described in the MCAI.

DATES: We must receive comments on this proposed AD by November 21, 
2011.

ADDRESSES: You may send comments 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 proposed 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 
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You 
may review copies of the referenced 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.

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 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: Daniel Parrillo, Program Manager, 
Continuing Operational Safety, FAA, New York Aircraft Certification 
Office (ACO), 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; 
telephone 516-228-7300; 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-2011-0994; 
Directorate Identifier 2010-NM-143-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 June 28, 2006, we issued AD 2006-14-05, Amendment 39-14676 (71 
FR 38979, July 11, 2006). That AD required actions intended to address 
an unsafe condition on the products listed above.
    Since we issued AD 2006-14-05, Amendment 39-14676 (71 FR 38979, 
July 11, 2006), we have determined it is necessary to require a new 
modification of the MLG door configuration. We have also removed 
airplanes equipped with the new MLG door during production from the 
applicability of this NPRM. Transport Canada Civil Aviation (TCCA), 
which is the aviation authority for Canada, has issued Canadian 
Airworthiness Directive CF-2003-23R3, dated May 21, 2010 (referred to 
after this as ``the MCAI''), to correct an unsafe condition for the 
specified products. The MCAI states:

    The right-hand inboard main landing gear (MLG) door of a CRJ 700 
departed the aircraft during the landing phase of flight. The door 
damaged the trailing edge flap and punctured the rear fuselage near 
the floor level. The aircraft landed safely. Preliminary 
investigation indicates the failure was initiated by fatigue of the 
panel structure near a panel hinge lug. Loss of the main landing 
gear door during flight could result in damage to the aircraft and 
injury to persons on the ground.
    Subsequent to the issuance of Revision 1 of this directive, 
Transport Canada (TC) approved an alternate means of compliance 
(AMOC), AARDG 2004/A007, to allow extension of the repeat inspection 
interval when inboard MLG doors have incorporated certain repairs or 
modifications.
    Subsequent to the issuance of the TC AMOC AARDG 2004/A007, an 
inboard MLG door departed from an aircraft operating under an AMOC 
equivalent to TC AMOC AARDG 2004/007. As a result of this incident, 
this directive was revised to Revision 2 to introduce additional 
inspection requirements according to Bombardier Alert Service 
Bulletin A670-32-016. In addition, Revision 2 also eliminated 
escalation of the repeat inspection interval allowed in TC AMOC 
AARDG 2004/007 and revised the aircraft applicability to add a new 
aircraft model.
    Since the issuance of Revision 2 of this directive, TC approved 
an AMOC, AARDG 2006-A051, to allow the installation of a new 
modified MLG door configuration and to perform alternative 
inspection. Service history shows that this new modified MLG door 
configuration resolves the safety concerns associated with this 
directive.
    Revision 3 of this directive mandates the incorporation of the 
new modified MLG door configuration in accordance with Bombardier 
Aerospace Service Bulletin (SB) 670BA-32-017 as the terminating 
action. In addition, this revision restricts the applicability to 
aircraft not equipped with the new modified MLG door configuration 
at delivery.

You may obtain further information by examining the MCAI in the AD 
docket.

    We have also revised paragraph (j)(2) of this NPRM to remove 
reference to Task Cards 32-12-01-000-801-A01 and 32-12-01-400-801-A01 
of the Bombardier CRJ 700/900 Series Regional Jet Aircraft Maintenance 
Manual. We

[[Page 61634]]

added Note 2 to this NPRM to refer to these tasks cards as additional 
sources of guidance for replacing the lower panel assembly. Operators 
may contact the International Branch, ANM-116, Transport Airplane 
Directorate, FAA, for information regarding the use of the task cards 
for replacing the lower panel assembly, as required by paragraph (j)(2) 
of this AD.

Relevant Service Information

    Bombardier has issued Alert Service Bulletin A670BA-32-016, 
Revision F, dated May 14, 2010, including Appendices A and B, dated 
June 2, 2005; and Service Bulletin 670BA-32-017, Revision C, dated May 
14, 2010. The actions described in this service information are 
intended to correct the unsafe condition identified in the MCAI.

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 the same 
type design.

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 proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a NOTE within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 220 products of U.S. registry.
    The actions that are required by AD 2006-14-05, Amendment 39-14676 
(71 FR 38979, July 11, 2006), and retained in this proposed AD take 
about 3 work-hours per product, at an average labor rate of $85 per 
work hour. Based on these figures, the estimated cost of the currently 
required actions is $255 per product.
    We estimate that it would take about 115 work-hours per product to 
comply with the new basic requirements of this proposed AD. The average 
labor rate is $85 per work-hour. Required parts would 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 costs. 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 the proposed AD 
on U.S. operators to be $2,150,500, or $9,775 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 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); 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 proposed AD and placed it in the AD docket.

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 Amendment 39-14676 (71 FR 
38979, July 11, 2006) and adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2011-0994; Directorate Identifier 
2010-NM-143-AD.

Comments Due Date

    (a) We must receive comments by November 21, 2011.

Affected ADs

    (b) This AD supersedes AD 2006-14-05, Amendment 39-14676 (71 FR 
38979, July 11, 2006).

Applicability

    (c) This AD applies to Bombardier, Inc. Model CL-600-2C10 
(Regional Jet Series 700, 701, & 702) airplanes having serial 
numbers (S/Ns) 10003 through 10230 inclusive; and Model CL-600-2D15 
(Regional Jet Series 705) airplanes; and Model CL-600-2D24 (Regional 
Jet Series 900) airplanes having S/Ns 15001 through 15053 inclusive, 
15055, and 15056; certificated in any category.

Subject

    (d) Air Transport Association (ATA) of America Code 32: Landing 
gear.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:

    The right-hand inboard main landing gear (MLG) door of a CRJ 700 
departed the aircraft during the landing phase of flight. The door 
damaged the trailing edge flap and punctured the rear fuselage near 
the floor level. The aircraft landed safely. Preliminary 
investigation indicates the failure was initiated by fatigue of the 
panel structure near a panel hinge lug. Loss of the main landing 
gear door during flight could result in damage to the aircraft and 
injury to persons on the ground.
* * * * *

[[Page 61635]]

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.

Restatement of Requirements of AD 2003-19-51, Amendment 39-13353 (68 FR 
61615, October 29, 2003), With Revised Serial Numbers and Service 
Information

Initial Compliance Time

    (g) For Model CL-600-2C10 (Regional Jet series 700 & 701) series 
airplanes, S/Ns 10003 through 10230 inclusive; and Model CL-600-2D24 
(Regional Jet series 900) series airplanes, S/Ns 15002 through 15053 
inclusive, 15055, and 15056: Perform the initial inspection 
specified in paragraph (h) of this AD at the applicable time 
specified in paragraph (g)(1) or (g)(2) of this AD.
    (1) For airplanes with fewer than 1,500 total flight cycles as 
of November 3, 2003 (the effective date of AD 2003-19-51, Amendment 
39-13353 (68 FR 61615, October 29, 2003)): Do the inspections before 
the accumulation of 1,050 total flight cycles, or within 50 flight 
cycles after August 15, 2006 (the effective date of AD 2006-14-05, 
Amendment 39-14676 (71 FR 38979, July 11, 2006)), whichever is 
later.
    (2) For airplanes with 1,500 or more total flight cycles as of 
November 3, 2003: Do the inspections within 10 flight cycles after 
August 15, 2006.

Inspections

    (h) For Model CL-600-2C10 (Regional Jet series 700 & 701) series 
airplanes, S/Ns 10003 through 10230 inclusive; and Model CL-600-2D24 
(Regional Jet series 900) series airplanes, S/Ns 15002 through 15053 
inclusive, 15055 and 15056: At the applicable time specified in 
paragraph (g) of this AD, perform detailed inspections of the lower 
panel, part number (P/N) CC670-10520, of the left- and right-hand 
MLG doors for the conditions and in the areas specified in 
paragraphs (h)(1), (h)(2), (h)(3), and (h)(4) of this AD; and 
Figures 1, 2, and 3 of this AD.

    Note 1: For the purposes of this AD, a detailed inspection is 
defined as: ``An intensive visual examination of a specific 
structural area, system, installation, or assembly to detect damage, 
failure, or irregularity. Available lighting is normally 
supplemented with a direct source of good lighting at intensity 
deemed appropriate by the inspector. Inspection aids such as mirror, 
magnifying lenses, etc., may be used. Surface cleaning and elaborate 
access procedures may be required.''

    (1) Inspect the cross member, P/N CC670-10572, of the MLG door 
lower panel for cracking or deformation, in accordance with Figure 2 
of this AD.
    (2) Inspect the inner skin, P/N CC670-10577, of the MLG door 
lower panel at the cross member (P/N CC670-10572) for cracking or 
deformation, or pulled or missing fasteners, in accordance with 
Figure 2 of this AD.
    (3) Inspect the outer skin, P/N CC670-10574, of the MLG door 
lower panel at the cross member (P/N CC670-10572) for cracking or 
deformation, or pulled or missing fasteners, in accordance with 
Figure 2 of this AD.
    (4) Inspect the forward member, P/N CC670-10570, and aft member, 
P/N CC670-10571, of the MLG door lower panel for cracking or 
deformation, or pulled or missing fasteners, in accordance with 
Figure 3 of this AD. Figures 1 through 3 of this AD follow.
BILLING CODE 4910-13-P
[GRAPHIC] [TIFF OMITTED] TP05OC11.015

[[Page 61636]]

[GRAPHIC] [TIFF OMITTED] TP05OC11.016

[GRAPHIC] [TIFF OMITTED] TP05OC11.017

BILLING CODE 4910-13-C

Repetitive Inspections

    (i) If no cracking or deformation, or pulled or missing 
fastener, as applicable, is found during any inspection required by 
paragraph (h) or (i) of this AD, repeat the inspections thereafter 
at intervals not to exceed 100 flight cycles.

Corrective Actions

    (j) If any cracking or deformation, or pulled or missing 
fastener, as applicable, is found during any inspection done in 
accordance with paragraph (h) or (i) of this AD: Before further 
flight, accomplish paragraph (j)(1), (j)(2), or (j)(3) of this AD.
    (1) Repair the damage in accordance with a method approved by 
either the Manager, New York Aircraft Certification Office (ACO), 
FAA; or Transport Canada Civil Aviation (TCCA) (or its delegated 
agent); and accomplish repetitive inspections in accordance with a 
method and at a repetitive interval approved by same.
    (2) Replace the lower panel assembly, P/N CC670-10520, of the 
affected MLG door with a new or serviceable lower panel assembly 
having the same P/N, according to a method approved by either the 
Manager, New York ACO, FAA; or TCCA (or its delegated agent).

[[Page 61637]]

Repeat the inspections specified in paragraph (h) of this AD at 
intervals not to exceed 100 flight cycles.

    Note 2: For guidance on replacing the lower panel assembly, 
refer to Task Cards 32-12-01-000-801-A01 and 32-12-01-400-801-A01 of 
the Bombardier CRJ 700/900 Series Regional Jet Aircraft Maintenance 
Manual.

    (3) Remove the lower panel assembly, P/N CC670-10520, of the 
affected MLG door, and accomplish paragraph (j)(3)(i) or (j)(3)(ii) 
of this AD, as applicable.
    (i) For Model CL600-2C10 (Regional Jet series 700 & 701) series 
airplanes: Revise the Configuration Deviation List (CDL), Appendix 
1, of the airplane flight manual (AFM), to include the following 
limitations. This may be accomplished by inserting a copy of this AD 
into the CDL of the AFM.
    ``For Model CL600-2C10 series airplanes: If one or both door 
panel assemblies, part number CC670-10520, is missing:
    (1) Take-off Weight is reduced by 202.5 kg/door, or 450 lb/door.
    (2) Enroute Climb Weight is reduced by 445.5 kg/door, or 990 lb/
door.
    (3) Landing Weight is reduced by 202.5 kg/door, or 450 lb/door.
    (4) Fuel Consumption is increased by +3.42% on fuel used/door.
    (5) Cruise Airspeed is limited to not more than 0.78 Mach.''
    (ii) For Model CL-600-2D24 (Regional Jet series 900) series 
airplanes: Revise the CDL, Appendix 1, of the AFM, to include the 
following limitations. This may be accomplished by inserting a copy 
of this AD into the CDL of the AFM.
    ``For Model CL600-2D24 series airplanes: If one or both door 
panel assemblies, part number CC670-10520, is missing:
    (1) Take-off Weight is reduced by 245 kg/door, or 540 lb/door.
    (2) Enroute Climb Weight is reduced by 551 kg/door, or 1,215 lb/
door.
    (3) Landing Weight is reduced by 245 kg/door, or 540 lb/door.
    (4) Fuel Consumption is increased by +3.42% on fuel used/door.
    (5) Cruise Airspeed is limited to not more than 0.78 Mach.''

Restatement of Requirements of AD 2006-14-05, Amendment 39-14676 (71 FR 
38979, July 11, 2006), With Revised Service Information:

Inboard MLG Door Inspections

    (k) For all airplanes on which an inspection has not been done 
in accordance with paragraph (h) of this AD on or before August 15, 
2006: At the applicable time specified in paragraph (k)(1) or (k)(2) 
of this AD, do the inspections of the left- and right-hand inboard 
MLG doors for damage, in accordance with Part A of the 
Accomplishment Instructions of Bombardier Alert Service Bulletin 
A670BA-32-016, Revision A, dated June 7, 2005, excluding Appendix A, 
dated June 2, 2005, and including Appendix B, dated June 2, 2005; or 
Bombardier Alert Service Bulletin A670BA-32-016, Revision F, dated 
May 14, 2010, excluding Appendix A, dated June 2, 2005, and 
including Appendix B, dated June 2, 2005. Doing the inspections 
required by this paragraph terminates the actions required by 
paragraphs (g) through (j) of this AD. As of the effective date of 
this AD, use only Bombardier Alert Service Bulletin A670BA-32-016, 
Revision F, dated May 14, 2010.
    (1) For airplanes that have accumulated fewer than 1,500 total 
flight cycles as of August 15, 2006: Before the accumulation of 
1,000 total flight cycles, or within 50 flight cycles after August 
15, 2006, whichever occurs later.
    (2) For airplanes that have accumulated 1,500 flight cycles or 
more as of August 15, 2006: Within 10 flight cycles after August 15, 
2006.
    (l) For airplanes on which an inspection has been done in 
accordance with paragraph (h) of this AD on or before August 15, 
2006: At the applicable time specified in paragraph (l)(1) or (l)(2) 
of this AD, inspect installed door(s) as specified in paragraph (k) 
of this AD. Doing the inspections required by this paragraph 
terminates the actions required by paragraphs (g) through (j) of 
this AD.
    (1) For airplanes that are not subject to an approved 
alternative method of compliance (AMOC) that extends the inspection 
interval to 450 flight cycles: Within 100 flight cycles since the 
last inspection done in accordance with paragraph (h) of this AD.
    (2) For airplanes that are subject to an approved AMOC that 
extends the inspection interval to 450 flight cycles: At the earlier 
of the times specified in paragraphs (l)(2)(i) and (l)(2)(ii) of 
this AD:
    (i) Within 450 flight cycles since the last inspection done in 
accordance with paragraph (h) of this AD.
    (ii) Within 100 flight cycles since the last inspection done in 
accordance with paragraph (h) of this AD, or within 50 cycles after 
August 15, 2006, whichever occurs later.
    (m) If no damage is found during any inspection done in 
accordance with paragraph (k) of this AD, repeat the inspections 
specified in paragraph (k) of this AD thereafter at intervals not to 
exceed 100 flight cycles.

Corrective Action--Replace or Remove MLG Door

    (n) If any damage is found during any inspection done in 
accordance with paragraph (k) of this AD, before further flight, do 
the actions in paragraph (n)(1) or (n)(2) of this AD. Repeat the 
inspections specified in paragraph (k) of this AD thereafter at 
intervals not to exceed 100 flight cycles.
    (1) Replace the inboard MLG door with a new or repaired door in 
accordance with Part B of the Accomplishment Instructions of the 
Bombardier Alert Service Bulletin A670BA-32-016, Revision A, dated 
June 7, 2005, excluding Appendix A, dated June 2, 2005, and 
including Appendix B, dated June 2, 2005; or Bombardier Alert 
Service Bulletin A670BA-32-016, Revision F, dated May 14, 2010, 
excluding Appendix A, dated June 2, 2005, and including Appendix B, 
dated June 2, 2005; except where those service bulletins specify to 
contact the manufacturer for repair if no generic repair engineering 
order (REO) is available, before further flight, repair using a 
method approved by either the Manager, New York ACO, FAA; or TCCA 
(or its delegated agent). As of the effective date of this AD, use 
only Bombardier Alert Service Bulletin A670BA-32-016, Revision F, 
dated May 14, 2010.
    (2) Remove the inboard MLG door in accordance with Part B of the 
Accomplishment Instructions of the Bombardier Alert Service Bulletin 
A670BA-32-016, Revision A, dated June 7, 2005, excluding Appendix A, 
dated June 2, 2005, and including Appendix B, dated June 2, 2005; or 
Bombardier Alert Service Bulletin A670BA-32-016, Revision F, dated 
May 14, 2010, excluding Appendix A, dated June 2, 2005, and 
including Appendix B, dated June 2, 2005; and accomplish paragraph 
(n)(2)(i) or (n)(2)(ii) of this AD, as applicable. As of the 
effective date of this AD, use only Bombardier Alert Service 
Bulletin A670BA-32-016, Revision F, dated May 14, 2010.
    (i) For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes and Model CL-600-2D15 (Regional Jet Series 705) airplanes: 
Revise the Configuration Deviation List (CDL), Appendix 1, of the 
Bombardier Canadair Regional Jet AFM, to include the following 
limitations. This may be accomplished by inserting a copy of this AD 
into the CDL of the AFM. Remove any existing CDL limitation required 
by paragraph (j)(3)(i) of this AD from the AFM.
    ``For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes and Model CL-600-2D15 (Regional Jet Series 705) airplanes: 
If one or both door panel assemblies, part number CC670-10520, is 
missing:
    (1) Take-off Weight is reduced by 202.5 kg/door, or 450 lb/door.
    (2) Enroute Climb Weight is reduced by 445.5 kg/door, or 990 lb/
door.
    (3) Landing Weight is reduced by 202.5 kg/door, or 450 lb/door.
    (4) Fuel Consumption is increased by +2.5% on fuel used/door.
    (5) Cruise Airspeed is limited to not more than 0.78 Mach.
    (6) The climb ceiling obtained from the Flight Planning and 
Cruise Control Manual (FPCCM) must be reduced by 1,000 ft/door.''

    Note 3: When a statement with the information specified in 
paragraph (n)(2)(i) of this AD has been included in the general 
revisions of the AFM, the general revisions may be inserted into the 
AFM, and the copy of this AD may be removed from the AFM.

    (ii) For Model CL-600-2D24 (Regional Jet Series 900) airplanes: 
Revise the CDL, Appendix 1, of the Bombardier Canadair Regional Jet 
AFM, to include the following limitations. This may be accomplished 
by inserting a copy of this AD into the CDL of the AFM. Remove any 
existing CDL limitation required by paragraph (j)(3)(ii) of this AD 
from the AFM.
    ``For Model CL-600-2D24 (Regional Jet Series 900) airplanes: If 
one or both door panel assemblies, part number CC670-10520, is 
missing:
    (1) Take-off Weight is reduced by 245 kg/door, or 540 lb/door.
    (2) Enroute Climb Weight is reduced by 551 kg/door, or 1,215 lb/
door.
    (3) Landing Weight is reduced by 245 kg/door, or 540 lb/door.

[[Page 61638]]

    (4) Fuel Consumption is increased by +2.5% on fuel used/door.
    (5) Cruise Airspeed is limited to not more than 0.78 Mach.
    (6) The climb ceiling obtained from the Flight Planning and 
Cruise Control Manual (FPCCM) must be reduced by 1,000 ft/door.''

    Note 4:  When a statement with the information specified in 
paragraph (n)(2)(ii) of this AD has been included in the general 
revisions of the AFM, the general revisions may be inserted into the 
AFM, and the copy of this AD may be removed from the AFM.

Revise CDL

    (o) For airplanes on which the door(s) have been removed in 
accordance with paragraph (j)(3) of this AD: Within 30 days after 
August 15, 2006, do the revision specified in paragraph (n)(2)(i) or 
(n)(2)(ii) of this AD, as applicable, and remove any revision 
required by paragraph (j)(3)(i) or (j)(3)(ii) of this AD.

No Reporting Required

    (p) Although Bombardier Alert Service Bulletin A670BA-32-016, 
Revision A, dated June 7, 2005, excluding Appendix A, dated June 2, 
2005, and including Appendix B, dated June 2, 2005; and Revision F, 
dated May 14, 2010, excluding Appendix A, dated June 2, 2005, and 
including Appendix B, dated June 2, 2005; specify to submit certain 
information to the manufacturer, this AD does not include that 
requirement.

Actions Accomplished According to Previous Issue of Service Bulletin

    (q) Actions accomplished before August 15, 2006, according to 
Bombardier Alert Service Bulletin A670BA-32-016, dated June 2, 2005, 
are considered acceptable for compliance with the corresponding 
actions of this AD.

New Requirements of This AD

Terminating Modification for MLG Door Configuration

    (r) Within 6,000 flight hours after the effective date of this 
AD, modify the MLG door, in accordance with the Accomplishment 
Instructions of Bombardier Service Bulletin 670BA-32-017, Revision 
C, dated May 14, 2010. Doing this modification terminates the 
requirements of this AD.

Credit for Actions Accomplished in Accordance With Previous Service 
Information

    (s) Modifying the MLG door before the effective date of this AD, 
in accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 670BA-32-017, dated July 24, 2006; Revision A, 
dated September 26, 2006; or Revision B, dated July 31, 2008; as 
applicable; is considered acceptable for compliance with the 
requirements of paragraph (r) of this AD.

FAA AD Differences

    Note 5: This AD differs from the MCAI and/or service information 
as follows: No differences.

Other FAA AD Provisions

    (t) The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York 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 Attention: 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, 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. AMOCs approved previously in accordance with AD 2006-14-05, 
Amendment 39-14676 (71 FR 38979, July 11, 2006), are acceptable for 
compliance with 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.

Related Information

    (u) Refer to MCAI TCCA Airworthiness Directive CF-2003-23R3, 
dated May 21, 2010; Bombardier Alert Service Bulletin A670BA-32-016, 
Revision F, dated May 14, 2010, excluding Appendix A, dated June 2, 
2005, and including Appendix B, dated June 2, 2005; and Bombardier 
Service Bulletin 670BA-32-017, Revision C, dated May 14, 2010; for 
related information.

    Issued in Renton, Washington, on September 22, 2011.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2011-25571 Filed 10-4-11; 8:45 am]
BILLING CODE 4910-13-P