Document ID: FAA-2015-8471-0001
Agency: faa
Document Type: Proposed Rule
Title: Airworthiness Directives: Bombardier, Inc. Airplanes
Posted Date: 2016-01-20T05:00Z

[Federal Register Volume 81, Number 12 (Wednesday, January 20, 2016)]
[Proposed Rules]
[Pages 3038-3042]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-00698]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-8471; Directorate Identifier 2013-NM-153-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to supersede Airworthiness Directive (AD) 2010-23-
19, that applies to certain Bombardier, Inc. Model CL-600-2C10 
(Regional Jet Series 700, 701, and 702) airplanes, Model CL-600-2D15 
(Regional Jet Series 705) airplanes, and Model CL-600-2D24 (Regional 
Jet Series 900) airplanes. AD 2010-23-19 requires repetitive 
inspections for damage of the main landing gear (MLG) inboard doors and 
fairing, and corrective actions if necessary. Since we issued AD 2010-
23-19, we have received reports of the MLG failing to fully extend. 
This proposed AD would require repetitive inspections for damage of the 
MLG inboard doors, MLG fairing, and adjacent structures of the MLG 
inboard doors, and corrective actions if necessary; replacement of the 
MLG fairing seal; and a terminating action involving increasing the 
clearances between the MLG fairing and MLG door. This proposed AD would 
also add one airplane and remove others from the applicability. We are 
proposing this AD to prevent loss of controllability of the airplane 
during landing.

DATES: We must receive comments on this proposed AD by March 7, 2016.

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; email 
thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You 
may view this referenced service information at the FAA, Transport 
Airplane Directorate, 1601 Lind Avenue SW., Renton, WA. For information 
on the availability of this material at the FAA, call 425-227-1221.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-
8471; or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this proposed AD, the regulatory evaluation, any comments 
received, and other information. The street address for the Docket 
Operations office (telephone 800-647-5527) is in the ADDRESSES section. 
Comments will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Ezra Sasson, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, NY 
11590; telephone 516-228-7320; fax 516-794-5531.

[[Page 3039]]

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-2015-8471; 
Directorate Identifier 2013-NM-153-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 November 1, 2010, we issued AD 2010-23-19, Amendment 39-16508 
(75 FR 68695, November 9, 2010). AD 2010-23-19 requires actions 
intended to address an unsafe condition on certain Bombardier, Inc. 
Model CL-600-2C10 (Regional Jet Series 700, 701, and 702) airplanes, 
Model CL-600-2D15 (Regional Jet Series 705) airplanes, and Model CL-
600-2D24 (Regional Jet Series 900) airplanes.
    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Airworthiness Directive CF-2010-36R1, 
dated July 18, 2013 (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:

    Two cases of main landing gear (MLG) failure to fully extend 
have been reported. An MLG failing to extend may result in an unsafe 
asymmetric landing configuration.
    Preliminary investigation has shown that interference between 
the MLG door and the MLG fairing seal prevented the MLG door from 
opening.
    This [Canadian] AD mandates the [detailed] inspection [for 
damage] and rectification [corrective action], as required, of the 
MLG fairing and seal, MLG door, and adjacent structures.
    Data collected from the Original Issue of this [Canadian] AD 
shows potential deficiencies with the inspection. This [Canadian] AD 
is revised to update the applicability section and to introduce 
additional mitigating actions and the terminating action [a 
modification that includes related investigative actions, and 
corrective action if necessary].

The unsafe condition is the loss of controllability of the airplane 
during landing.
    Damage includes the following:
     For the MLG fairing seal: Cracks, cuts, or tears in the 
material of the MLG fairing seal, and cuts in the material base.
     For the MLG inboard doors: Missing or broken rollers on 
the MLG inboard door, missing stops, loose or missing fasteners from 
the stops, and damage (including, but not limited to, corrosion, 
cracking, and dents) along the edge of the MLG inboard door adjacent to 
the MLG fairing.
     For the MLG fairing: Missing forward and aft stops, loose 
or missing fasteners from the forward and aft stops, and damage 
(including, but not limited to, corrosion, cracking, and dents) along 
the edge of the MLG fairing adjacent to the MLG inboard door.
     For the stops and wedges on the forward and aft spars: 
Missing stops, loose or missing fasteners from the stops, missing 
wedges, and loose or missing fasteners from the wedges.
    Corrective actions include replacement of MLG fairing seals, and 
increasing the clearances between the MLG fairing and MLG door.
    The terminating modification involves increasing the clearance 
between the left and right MLG fairings and the left and right MLG 
doors. Related investigative actions for the terminating modification 
include the following inspections:
     A detailed inspection of the MLG fairing for missing 
forward and aft stops, loose or missing fasteners from the forward and 
aft stops, and damage along the edge of the MLG fairing adjacent to the 
MLG inboard door.
     A detailed visual inspection of the MLG inboard door for 
missing or broken rollers on the MLG inboard door, missing stops, loose 
or missing fasteners from the stops, and damage along the edge of the 
MLG inboard door adjacent to the MLG fairing.
     A detailed visual inspection on the stops and wedge on the 
forward and aft spars for missing stops, loose or missing fasteners 
from the stops, missing wedges, and loose or missing fasteners from the 
wedges.
     A liquid penetrant inspection or an eddy current 
inspection for cracks in the aft stop-fitting and stiffener of the 
forward member of the MLG inboard door.
    You may examine the MCAI in the AD docket on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-
8471.

Related Service Information Under 1 CFR Part 51

    Bombardier, Inc. has issued Alert Service Bulletin A670BA-32-030, 
Revision D, dated August 6, 2013, which describes procedures for an 
inspection of the MLG inboard doors, MLG fairing, and adjacent 
structure of the MLG inboard doors. This service bulletin also 
describes procedures for replacement of damaged MLG fairing seal(s) and 
for a clearance check of the MLG door or, if necessary, for removing 
and/or installing a MLG door.
    Bombardier, Inc. has also issued Bombardier Service Bulletin 670BA-
32-040, Revision E, dated November 13, 2014, which describes procedures 
for increasing the clearances between the fairing and the MLG inboard 
doors, and between the MLG fairing and adjacent structure of the MLG 
doors. This service bulletin also describes procedures for adjusting 
the MLG doors.
    This service information is reasonably available because the 
interested parties have access to it through their normal course of 
business or by the means identified in the ADDRESSES section of this 
NPRM.

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.

Costs of Compliance

    We estimate that this proposed AD affects 416 airplanes of U.S. 
registry.
    The actions that are required by AD 2010-23-19, Amendment 39-16508 
(75 FR 68695, November 9, 2010), and retained in this proposed AD take 
about 1 work-hour per product, at an average labor rate of $85 per 
work-hour. Based on these figures, the estimated cost of the actions 
that are required by AD 2010-23-19 is $85 per inspection cycle for each 
product.
    We also estimate that it would take about 50 work-hours for each 
product to comply with the basic requirements of this proposed AD. The 
average labor rate is $85 per work-hour. Based on these figures, we 
estimate the cost of this proposed AD on U.S. operators to

[[Page 3040]]

be $1,768,000, or $4,250 for each product.
    In addition, we estimate that any necessary follow-on replacement 
actions would take about 24 work-hours and require parts costing 
$2,626, for a cost of $4,666 per product. We have no way of determining 
the number of aircraft that might need these actions.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, section 106, describes the 
authority of the FAA Administrator. ``Subtitle VII: Aviation 
Programs,'' describes in more detail the scope of the Agency's 
authority.
    We are issuing this rulemaking under the authority described in 
``Subtitle VII, Part A, Subpart III, Section 44701: General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979);
    3. Will not affect intrastate aviation in Alaska; and
    4. Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

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

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

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) 
2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010), and 
adding the following new AD:

Bombardier, Inc.: Docket No. FAA-2015-8471; Directorate Identifier 
2013-NM-153-AD.

(a) Comments Due Date

    We must receive comments by March 7, 2016.

(b) Affected ADs

    This AD replaces AD 2010-23-19, Amendment 39-16508 (75 FR 68695, 
November 9, 2010).

(c) Applicability

    This AD applies to the Bombardier, Inc. airplanes identified in 
paragraphs (c)(1) and (c)(2) of this AD, certificated in any 
category.
    (1) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes, having serial numbers (S/Ns) 10002 through 10333 
inclusive.
    (2) Model CL-600-2D15 (Regional Jet Series 705) and CL-600-2D24 
(Regional Jet Series 900) airplanes, having S/Ns 15001 through 15284 
inclusive.

(d) Subject

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

(e) Reason

    This AD was prompted by reports of the main landing gear (MLG) 
failing to fully extend. We are issuing this AD to prevent loss of 
controllability of the airplane during landing.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Retained Repetitive Inspections and Corrective Actions, With New 
Service Information and Revised Repair Instructions

    (1) This paragraph restates the requirements of paragraph (g) of 
AD 2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010), 
with new service information. For airplanes having S/Ns 10003 
through 10313 inclusive, 15001 through 15238 inclusive, and 15240 
through 15255 inclusive: Within 50 flight cycles after November 24, 
2010 (the effective date of AD 2010-23-19), do the inspections 
specified in paragraphs (g)(1)(i) through (g)(1)(iv) of this AD, in 
accordance with ``PART A--Inspection of the MLG Inboard Doors, MLG 
Fairing and Adjacent Structure'' of the Accomplishment Instructions 
of Bombardier Alert Service Bulletin A670BA-32-030, Revision A, 
dated October 22, 2010; or Bombardier Alert Service Bulletin A670BA-
32-030, Revision D, dated August 6, 2013; as applicable. As of the 
effective date of this AD, use only Bombardier Alert Service 
Bulletin A670BA-32-030, Revision D, dated August 6, 2013, to 
accomplish the actions required by this paragraph. Repeat the 
inspections thereafter at intervals not to exceed 600 flight hours.
    (i) Do a detailed inspection for damage (including wear lines, 
cracks, fraying, tears, and evidence of chafing) of the rubber seal 
of the MLG fairing.
    (ii) Do a detailed inspection for damage (including missing and 
broken rollers, loose and missing fasteners, and damaged and missing 
stops) of the MLG inboard doors, and for damage along the edge of 
the MLG inboard door adjacent to the MLG fairing.
    (iii) Do a detailed inspection of the MLG fairing for damage 
(including missing forward and aft stops, and loose and missing 
fasteners), and for damage along the edge of the MLG fairing 
adjacent to the MLG door.
    (iv) Do a detailed inspection for damage (including missing 
stops, loose and missing fasteners, and missing wedges) of the stops 
and wedge on the forward and aft spars.
    (2) This paragraph restates the requirements of paragraph (h) of 
AD 2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010), 
with revised service information. For airplanes not identified in 
paragraph (g)(1) of this AD, excluding the airplane having S/N 
10002, and excluding airplanes having MLG fairing seals having part 
numbers (P/Ns) CC670-39244-5 and CC670-39244-6: Within 600 flight 
hours after November 24, 2010 (the effective date of AD 2010-23-19), 
do the inspections specified in paragraphs (g)(2)(i) through 
(g)(2)(iv) of this AD, in accordance with ``PART A--Inspection of 
the MLG Inboard Doors, MLG Fairing and Adjacent Structure'' of the 
Accomplishment Instructions of Bombardier Alert Service Bulletin 
A670BA-32-030, Revision A, dated October 22, 2010; or Bombardier 
Alert Service Bulletin A670BA-32-030, Revision D, dated August 6, 
2013. As of the effective date of this AD, use only Bombardier Alert 
Service Bulletin A670BA-32-030, Revision D, dated August 6, 2013, to 
accomplish the actions required by this paragraph. Repeat the 
inspections thereafter at intervals not to exceed 600 flight hours.
    (i) Do a detailed inspection for damage (including wear lines, 
cracks, fraying, tears, and evidence of chafing) of the rubber seal 
of the MLG fairing.
    (ii) Do a detailed inspection for damage (including missing and 
broken rollers, loose and missing fasteners, and damaged and missing 
stops) of the MLG inboard doors, and for damage along the edge of 
the MLG inboard door adjacent to the MLG fairing.
    (iii) Do a detailed inspection of the MLG fairing for damage 
(including missing forward and aft stops, and loose and missing 
fasteners), and for damage along the edge of the MLG fairing 
adjacent to the MLG door.
    (iv) Do a detailed inspection for damage (including missing 
stops, loose and missing

[[Page 3041]]

fasteners, and missing wedges) of the stops and wedge on the forward 
and aft spars.
    (3) This paragraph restates the requirements of paragraph (i) of 
AD 2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010), 
with revised service information. If damage to only the rubber seal 
on the MLG fairing is found during any inspection required by 
paragraph (g)(1) or (g)(2) of this AD, before further flight, do 
either action specified in paragraph (g)(3)(i) or (g)(3)(ii) of this 
AD.
    (i) Replace the rubber seal on the MLG fairing with a new rubber 
seal, in accordance with ``PART B--Replacement of the Forward Rubber 
Seal on the MLG Fairing'' of the Accomplishment Instructions of 
Bombardier Alert Service Bulletin A670BA-32-030, Revision A, dated 
October 22, 2010; or the Accomplishment Instructions of Bombardier 
Alert Service Bulletin A670BA-32-030, Revision D, dated August 6, 
2013. As of the effective date of this AD, use only Bombardier Alert 
Service Bulletin A670BA-32-030, Revision D, dated August 6, 2013, to 
accomplish the actions required by this paragraph.
    (ii) Remove the MLG inboard door, in accordance with ``PART C--
Removal of MLG Inboard Door'' of the Accomplishment Instructions of 
Bombardier Alert Service Bulletin A670BA-32-030, Revision A, dated 
October 22, 2010; or Bombardier Alert Service Bulletin A670BA-32-
030, Revision D, dated August 6, 2013. For airplanes on which the 
MLG inboard door is re-installed, do the installation of the MLG 
inboard door in accordance with ``PART D--Installation of MLG 
Inboard Door'' of the Accomplishment Instructions of Bombardier 
Alert Service Bulletin A670BA-32-030, Revision A, dated October 22, 
2010; or Bombardier Alert Service Bulletin A670BA-32-030, Revision 
D, dated August 6, 2013. As of the effective date of this AD, use 
only Bombardier Alert Service Bulletin A670BA-32-030, Revision D, 
dated August 6, 2013, to accomplish the actions required by this 
paragraph.
    (4) This paragraph restates the requirements of paragraph (j) of 
AD 2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010), 
with revised repair instructions. If damage other than the damage 
identified in paragraph (g)(3) of this AD is found during any 
inspection required by paragraph (g)(1) or (g)(2) of this AD, before 
further flight, contact the Bombardier Regional Aircraft Customer 
Response Center for repair instructions and do the repair; or repair 
using a method approved by the Manager, New York ACO, ANE-170, FAA; 
or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s 
TCCA Design Approval Organization (DAO).

(h) New Inspections of MLG Fairing Seal Having P/N CC670-39244-1 or 
CC670-39244-2

    For airplanes on which an MLG fairing seal having P/N CC670-
39244-1 or P/N CC670-39244-2 is installed: At the applicable time 
specified in paragraph (i)(1) of this AD, do the inspections 
specified in paragraphs (h)(1) through (h)(4) of this AD, in 
accordance with the Accomplishment Instructions of Bombardier Alert 
Service Bulletin A670BA-32-030, Revision D, dated August 6, 2013, 
except as specified in paragraph (o) of this AD. Repeat the 
inspections thereafter at the time specified in paragraph (i)(2) of 
this AD.
    (1) Do a detailed inspection for damage (including cracking, 
cuts, and tears in the material (fabric/rubber)) of the MLG fairing 
and seal.
    (2) Do a detailed inspection for damage (including missing and 
broken rollers, loose and missing fasteners, and damaged and missing 
stops) of the MLG inboard doors, and for damage along the edge of 
the MLG inboard door adjacent to the MLG fairing.
    (3) Do a detailed inspection of the MLG fairing for damage 
(including missing forward and aft stops, and loose and missing 
fasteners), and for damage (including, but not limited to, 
corrosion, cracking, and dents) along the edge of the MLG fairing 
adjacent to the MLG door.
    (4) Do a detailed inspection for damage (including missing 
stops, loose and missing fasteners, and missing wedges) of the stops 
and wedge on the forward and aft spars.

(i) New Compliance Times for the Actions Required by Paragraph (h) of 
This AD

    This paragraph specifies the compliance times for the actions 
required by paragraph (h) of this AD.
    (1) The initial compliance time is specified in paragraphs 
(i)(1)(i) and (i)(1)(ii) of this AD.
    (i) For airplanes having S/Ns 10002 through 10313 inclusive; 
15001 through 15238 inclusive; and 15240 through 15255 inclusive: 
Within 50 flight cycles after the effective date of this AD.
    (ii) For all other airplane serial numbers: Within 600 flight 
hours after the effective date of this AD.
    (2) Repeat the inspections specified in paragraph (h) of this AD 
at the earlier of the times specified in paragraphs (i)(2)(i) and 
(i)(2)(ii) of this AD.
    (i) Repeat the inspections within 200 flight hours after the 
effective date of this AD. Repeat the inspections thereafter at 
intervals not to exceed 200 flight hours.
    (ii) Repeat the inspections within 600 flight hours after the 
most recent inspection done in accordance with the requirements of 
AD 2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010). 
Repeat the inspections thereafter at intervals not to exceed 200 
flight hours.

(j) New Corrective Actions

    (1) If any damage to the MLG fairing seal is found during any 
inspection required by paragraph (h) of this AD: Before further 
flight, do the actions specified in paragraph (j)(1)(i) or 
(j)(1)(ii) of this AD, except as specified in paragraph (o) of this 
AD.
    (i) Before further flight, remove the MLG inboard doors, in 
accordance with Part C of the Accomplishment Instructions of 
Bombardier Alert Service Bulletin A670BA-32-030, Revision D, dated 
August 6, 2013. For airplanes on which the MLG inboard door is re-
installed, do the installation of the MLG inboard door in accordance 
with Part D of the Accomplishment Instructions of Bombardier Alert 
Service Bulletin A670BA-32-030, Revision D, dated August 6, 2013.
    (ii) Before further flight, replace the MLG fairing seals, in 
accordance with Part E of the Accomplishment Instructions of 
Bombardier Alert Service Bulletin A670BA-32-030, Revision D, dated 
August 6, 2013. Within 200 flight hours after installing the MLG 
fairing seals, do the actions required by paragraph (h) of this AD.
    (2) If any damage other than that specified in paragraph (j)(1) 
of this AD is found, or if parts or fasteners are found missing, 
during any inspection required by paragraph (h) of this AD, before 
further flight, repair using a method approved by the Manager, New 
York ACO, ANE-170, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO.

(k) New Replacement of MLG Fairing Seals

    Within 2,500 flight hours or 12 months, whichever occurs first, 
after the effective date of this AD: Replace any MLG fairing seals 
having P/Ns CC670-39244-1 and CC670-39244-2 with P/Ns CC670-39244-5 
and CC670-39244-6, respectively, in accordance with Part E of the 
Accomplishment Instructions of Bombardier Alert Service Bulletin 
A670BA-32-030, Revision D, dated August 6, 2013, except as specified 
in paragraph (o) of this AD.

(l) New MLG Fairing Seal Post-Replacement Inspections

    Within 600 flight hours after installing fairing seals having P/
Ns CC670-39244-5 or CC670-39244-6: Do the inspections specified in 
paragraphs (h)(1) through (h)(4) of this AD, in accordance with the 
Accomplishment Instructions of Bombardier Alert Service Bulletin 
A670BA-32-030, Revision D, dated August 6, 2013. If any damage to 
the MLG fairing seal is found during any inspection required by this 
paragraph: Before further flight, do the applicable actions 
specified in paragraphs (j)(1) or (j)(2) of this AD. If no damage is 
found during any inspection required by this paragraph, repeat the 
inspections specified in paragraphs (h)(1) through (h)(4) of this AD 
thereafter at intervals not to exceed 600 flight hours, except as 
provided in paragraph (m) of this AD.

(m) New Exception to MLG Fairing Seal Post-Replacement Inspections

    After accomplishment of the initial inspections specified in 
paragraph (l) of this AD, removal of the MLG inboard door, in 
accordance with the Accomplishment Instructions of Bombardier Alert 
Service Bulletin A670BA-32-030, Revision D, dated August 6, 2013, 
defers the repetitive inspections required by paragraph (l) of this 
AD until the MLG inboard door is re-installed. For airplanes on 
which the MLG inboard door is re-installed, do the installation of 
the MLG inboard door in accordance with the Accomplishment 
Instructions of Bombardier Alert Service Bulletin A670BA-32-030, 
Revision D, dated August 6, 2013, except as specified in paragraph 
(o) of this AD; and before the accumulation of 600 flight hours on 
the MLG inboard door since the actions required by paragraph (k) of 
this AD were accomplished, do the inspections specified in paragraph 
(l) of this AD, and repeat the inspections thereafter at the 
applicable time specified in paragraph (l) of this AD.

[[Page 3042]]

(n) New Terminating Modification

    Within 6,600 flight hours or 36 months, whichever occurs first 
after the effective date of this AD: Modify the airplane by 
increasing the clearance between the left and right MLG fairings and 
the left and right MLG doors; and do all applicable related 
investigative and corrective actions; in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 670BA-32-
040, Revision E, dated November 13, 2014, except as provided by 
paragraph (o) of this AD. Do all applicable related investigative 
and corrective actions before further flight. If an MLG door has 
been removed, the modification may be delayed until the MLG door is 
re-installed in accordance with the Accomplishment Instructions of 
Bombardier Alert Service Bulletin A670BA-32-030, Revision D, dated 
August 6, 2013. Accomplishing this modification terminates the 
requirements of paragraphs (g) through (m) of this AD for that MLG 
door.

(o) Exceptions to Bombardier Service Bulletins

    Where Bombardier Alert Service Bulletin A670BA-32-030, Revision 
D, dated August 6, 2013; and Bombardier Service Bulletin 670BA-32-
040, Revision E, dated November 14, 2014; specify to contact the 
Bombardier Customer Response Center for an analysis or to get an 
approved disposition, repair using a method approved by the Manager, 
New York ACO, ANE-170, FAA; or TCCA; or Bombardier, Inc.'s TCCA DAO.

(p) Credit for Previous Actions

    (1) This paragraph restates the provisions of paragraph (l) of 
AD 2010-23-19, Amendment 39-16508 (75 FR 68695, November 9, 2010), 
with additional service information. This paragraph provides credit 
for the actions required by paragraph (g) of this AD, if those 
actions were performed before November 24, 2010 (the effective date 
of AD 2010-23-19) using Bombardier Alert Service Bulletin A670BA-32-
030, dated October 18, 2010; or Bombardier Alert Service Bulletin 
A670BA-32-030, Revision A, dated October 22, 2010.
    (2) This paragraph provides credit for the corresponding actions 
required by paragraphs (g)(1), (g)(2), (g)(3)(i), (g)(3)(ii), (h), 
(j)(1), (k), (l), (m), and (n) of this AD, if those actions were 
performed before the effective date of this AD using the service 
bulletins specified in paragraph (p)(2)(i), (p)(2)(ii), or 
(p)(2)(iii) of this AD.
    (i) Bombardier Alert Service Bulletin A670BA-32-030, Revision A, 
dated October 22, 2010.
    (ii) Bombardier Alert Service Bulletin A670BA-32-030, Revision 
B, dated November 3, 2011.
    (iii) Bombardier Alert Service Bulletin A670BA-32-030, Revision 
C, dated March 13, 2013.
    (3) This paragraph provides credit for the corresponding actions 
required by paragraph (n) of this AD, if those actions were 
performed before the effective date of this AD using the service 
information specified in paragraph (p)(3)(i), (p)(3)(ii), 
(p)(3)(iii), or (p)(3)(iv) of this AD.
    (i) Bombardier Service Bulletin 670BA-32-040, Revision A, dated 
March 13, 2013.
    (i) Bombardier Service Bulletin 670BA-32-040, Revision B, dated 
August 6, 2013.
    (iii) Bombardier Service Bulletin 670BA-32-040, Revision C, 
dated November 1, 2013.
    (iv) Bombardier Service Bulletin 670BA-32-040, Revision D, dated 
July 2, 2014.

(q) Other FAA AD Provisions

    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. 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, NY 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.
    (2) Contacting the Manufacturer: As of the effective date of 
this AD, for any requirement in this AD to obtain corrective actions 
from a manufacturer, the action must be accomplished using a method 
approved by the Manager, New York ACO, ANE-170, FAA; or TCCA; or 
Bombardier, Inc.'s TCCA DAO. If approved by the DAO, the approval 
must include the DAO-authorized signature.

(r) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian Airworthiness Directive CF-2010-36R1, dated July 18, 
2013, for related information. This MCAI may be found in the AD 
docket on the Internet at http://www.regulations.gov by searching 
for and locating Docket No. FAA-2015-8471.
    (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; email thd.crj@aero.bombardier.com; Internet http://www.bombardier.com. You may view this referenced service information 
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue SW., 
Renton, WA. For information on the availability of this material at 
the FAA, call 425-227-1221.

    Issued in Renton, Washington, on January 6, 2016.
Victor Wicklund,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-00698 Filed 1-19-16; 8:45 am]
BILLING CODE 4910-13-P