Document ID: FAA-2015-8471-0004
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: Bombardier, Inc. Airplanes
Posted Date: 2016-10-13T04:00Z

[Federal Register Volume 81, Number 198 (Thursday, October 13, 2016)]
[Rules and Regulations]
[Pages 70595-70599]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2016-22835]

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  Federal Register / Vol. 81, No. 198 / Thursday, October 13, 2016 / 
Rules and Regulations  

[[Page 70595]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2015-8471; Directorate Identifier 2013-NM-153-AD; 
Amendment 39-18666; AD 2016-19-17]
RIN 2120-AA64

Airworthiness Directives; Bombardier, Inc. Airplanes

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

ACTION: Final rule.

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

SUMMARY: We are superseding Airworthiness Directive (AD) 2010-23-19 for 
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 required repetitive inspections for damage of the main 
landing gear (MLG) inboard doors and fairing, and corrective actions if 
necessary. This new AD requires 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 new AD also adds 
one airplane and removes others from the applicability. This AD was 
prompted by reports of the MLG failing to fully extend. We are issuing 
this AD to prevent loss of controllability of the airplane during 
landing.

DATES: This AD is effective November 17, 2016.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of November 17, 
2016.

ADDRESSES: For service information identified in this final rule, 
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. It is also available on the Internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2015-
8471.

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 AD, the regulatory evaluation, any comments received, and 
other information. The address for the Docket Office (telephone 800-
647-5527) is Docket Management Facility, U.S. Department of 
Transportation, Docket Operations, M-30, West Building Ground Floor, 
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.

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.

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede AD 2010-23-19, Amendment 39-16508 (75 FR 68695, 
November 9, 2010) (``AD 2010-23-19''). AD 2010-23-19 applied 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. The NPRM 
published in the Federal Register on January 20, 2016 (81 FR 3038) 
(``the NPRM''). The NPRM was prompted by reports of the MLG failing to 
fully extend. The NPRM proposed to continue to require repetitive 
inspections for damage of the MLG inboard doors and fairing, and 
corrective actions if necessary. The NPRM also proposed to 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. The NPRM also proposed to add one 
airplane and remove others from the applicability. We are issuing this 
AD to prevent loss of controllability of the airplane during landing.
    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 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. 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

[[Page 70596]]

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 wedges 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.

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comment received on the NPRM and 
the FAA's response to the comment.

Support for the NPRM

    The Air Line Pilots Association, International (ALPA), stated that 
it supports the proposed requirements.

Request To Revise Preflight Check

    ALPA requested that we mandate a flightcrew check of the MLG door 
from the rear during preflight checks of the aft portion of the MLG. 
ALPA stated that an informal poll of ALPA carriers suggested that there 
is not a universally required position from which to make such a check. 
ALPA suggested that including a specific MLG fairing seal check in the 
preflight procedures would enhance the preflight inspection.
    We do not agree with the commenter's request. The door seals have 
numerous marks and the only way to determine if there is significant 
damage to the MLG door fairing and seal would be to perform a detailed 
inspection as specified in Bombardier Alert Service Bulletin A670BA-32-
030. Flightcrews are not trained to accomplish this inspection and 
would not be able to accurately assess the damage during the limited 
time assigned for the preflight check. Canadian AD CF-2010-36R1, dated 
July 18, 2013, requires increasing the clearance between the MLG 
fairings and the MLG doors. The effectiveness of Canadian AD CF-2010-
36R1 is being monitored, and we have no information that the required 
modification is not effective. As of April 2016, Bombardier In-Service-
Engineering has confirmed that there have been no reports of the MLG 
door being jammed in the MLG fairing on airplanes that have done the 
actions specified in Bombardier Service Bulletin 670BA-32-040. We have 
not changed this AD in this regard.

Revised Service Information

    Bombardier, Inc. has issued Service Bulletin 670BA-32-040, Revision 
F, dated February 11, 2016, including Appendix A, Revision A, and 
Appendix B, Revision B, both dated July 12, 2014. This service 
information incorporates small editorial changes, which have no effect 
on airplanes that have incorporated prior revisions of this service 
information. We have revised paragraphs (n) and (o) of this AD to 
reference this service information as the appropriate source of service 
information for accomplishing the required actions in those paragraphs. 
We have also added a new paragraph (p)(3)(v) to this AD to give credit 
for accomplishment of the actions required by paragraph (n) of this AD, 
if those actions were performed before the effective date of this AD 
using Bombardier Service Bulletin 670BA-32-040, Revision E, dated 
November 13, 2014.

Clarification of Revised Repair Instruction

    We have clarified the revised repair instructions in paragraph 
(g)(4) of this AD by specifying that, as of the effective date of this 
AD, if damage other than the damage identified in paragraph (g)(3) of 
this AD is found the repairs must be approved using a method approved 
by the Manager, New York Aircraft Certification Office (ACO), ANE-170, 
FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s 
TCCA Design Approval Organization (DAO).

Conclusion

    We reviewed the available data, including the comment received, and 
determined that air safety and the public interest require adopting 
this AD with the changes described previously and minor editorial 
changes. We have determined that these changes:
     Are consistent with the intent that was proposed in the 
NPRM for correcting the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

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 information also 
describes procedures for replacing 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 Service Bulletin 670BA-32-040, 
Revision F, dated February 11, 2016, including Appendix A, Revision A, 
and Appendix B, Revision B, both dated July 12, 2014. This service 
information 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 information 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.

[[Page 70597]]

Costs of Compliance

    We estimate that this AD affects 416 airplanes of U.S. registry.
    The actions required by AD 2010-23-19 and retained in this 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 were required by AD 2010-23-19 is $85 per inspection cycle for 
each product.
    We also estimate that it takes about 50 work-hours for each product 
to comply with the basic requirements of this AD. The average labor 
rate is $85 per work-hour. Based on these figures, we estimate the cost 
of this AD on U.S. operators to 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 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, 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.

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

2016-19-17 Bombardier, Inc.: Amendment 39-18666; Docket No. FAA-
2015-8471; Directorate Identifier 2013-NM-153-AD.

(a) Effective Date

    This AD is effective November 17, 2016.

(b) Affected ADs

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

(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, 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 wedges on the forward and aft spars.
    (2) This paragraph restates the requirements of paragraph (h) of 
AD 2010-23-19, 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.

[[Page 70598]]

    (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 wedges on the forward and aft spars.
    (3) This paragraph restates the requirements of paragraph (i) of 
AD 2010-23-19, 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, 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 Aircraft 
Certification Office (ACO), ANE-170, FAA; or Transport Canada Civil 
Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval 
Organization (DAO). As of the effective date of this AD, 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, repair using a method approved by 
the Manager, New York Aircraft Certification Office (ACO), ANE-170, 
FAA; or TCCA; or Bombardier, Inc.'s TCCA 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 wedges 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 S/Ns 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. 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 paragraph (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

[[Page 70599]]

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.

(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 F, dated February 11, 2016, including Appendix A, 
Revision A, and Appendix B, Revision B, both dated July 12, 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 Information

    Where Bombardier Alert Service Bulletin A670BA-32-030, Revision 
D, dated August 6, 2013; and Bombardier Service Bulletin 670BA-32-
040, Revision F, dated February 11, 2016, including Appendix A, 
Revision A, and Appendix B, Revision B, dated July 12, 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, 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 
information 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, 
including Appendix 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), (p)(3)(iv), or (p)(3)(v) 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.
    (v) Bombardier Service Bulletin 670BA-32-040, Revision E, dated 
November 13, 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.
    (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) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (s)(3) and (s)(4) of this AD.

(s) 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 this AD specifies otherwise.
    (i) Bombardier Alert Service Bulletin A670BA-32-030, Revision D, 
dated August 6, 2013.
    (ii) Bombardier Service Bulletin 670BA-32-040, Revision F, dated 
February 11, 2016, including the following appendices.
    (A) Appendix A, Revision A, dated July 12, 2014.
    (B) Appendix B, Revision B, dated July 12, 2014.
    (3) 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.
    (4) You may view this 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.
    (5) 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: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Renton, Washington, on September 14, 2016.
Michael Kaszycki,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2016-22835 Filed 10-12-16; 8:45 am]
 BILLING CODE 4910-13-P