Document ID: FAA-2009-0712-0006
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: Bombardier, Inc. Model DHC-8-100 and DHC-8-200 Series Airplanes, and Model DHC-8-301, -311, and -315 Airplanes
Posted Date: 2010-03-04T05:00Z

[Federal Register: March 4, 2010 (Volume 75, Number 42)]
[Rules and Regulations]               
[Page 9756-9760]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr04mr10-2]                         

[[Page 9756]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0712; Directorate Identifier 2007-NM-152-AD; 
Amendment 39-16205; AD 2010-04-12]
RIN 2120-AA64

 
Airworthiness Directives; Bombardier, Inc. Model DHC-8-100 and 
DHC-8-200 Series Airplanes, and Model DHC-8-301, -311, and -315 
Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Model DHC-8-100 and DHC-8-200 series airplanes, and DHC-8-301, -311, 
and -315 airplanes. This AD requires implementing a corrosion 
prevention and control program (CPCP) either by accomplishing specific 
tasks or by revising the maintenance inspection program to include a 
CPCP. This AD results from the determination that, as airplanes age, 
they are more likely to exhibit indications of corrosion. We are 
issuing this AD to prevent structural failure of the airplane due to 
corrosion.

DATES: This AD is effective April 8, 2010.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of April 8, 
2010.

ADDRESSES: For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec 
H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-7401; e-mail 
thd.qseries@aero.bombardier.com; Internet http://www.bombardier.com.

Examining the AD Docket

    You may examine the AD docket on the Internet at http://
www.regulations.gov; 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 the Document 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: Craig Yates, Aerospace Engineer, 
Airframe and Mechanical Systems Branch, ANE-171, FAA, New York Aircraft 
Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New 
York 11590; telephone (516) 228-7355; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to include an airworthiness directive (AD) that would apply to 
certain Bombardier Model DHC-8-100 and DHC-8-200 series airplanes, and 
DHC-8-301, -311, and -315 airplanes. That NPRM was published in the 
Federal Register on August 13, 2009 (74 FR 40778). That NPRM proposed 
to require implementing a corrosion prevention and control program 
(CPCP) either by accomplishing specific tasks or by revising the 
maintenance inspection program to include a CPCP.

Comments

    We gave the public the opportunity to participate in developing 
this AD. We considered the comment received from the single commenter.

Request for Clarification of Inspections

    Mesa Airlines requests that we restate that the inspections 
required by paragraph (h) of this AD to specify to inspect for 
Environmental Damage and/or Corrosion Protection and Control Program 
(ED/CPCP). The commenter asserts that the NPRM would require only tasks 
identified as both ED and CPCP. Mesa Airlines notes that accomplishing 
the ED/CPCP inspections only does not encompass the Air Transport 
Association (ATA) of America Codes listed in the NPRM.
    We agree. Canadian AD CF-2007-06, dated April 10, 2007, describes 
doing ``ED/CPCP'' inspections. The required actions include ``ED'' 
inspections and inspections identified as both ``ED'' and ``CPCP.'' We 
have clarified this in paragraph (h) of this AD. This has been 
coordinated with TCCA. We have also revised paragraphs (i) and (i)(2) 
of this AD to clarify the inspections.

Explanation of Change Made to This AD

    We have revised this AD to identify the legal name of the 
manufacturer as published in the most recent type certificate data 
sheet for the affected airplane models.

Conclusion

    We reviewed the relevant data, considered the comment received, and 
determined that air safety and the public interest require adopting the 
AD with the changes described previously. We also determined that these 
changes will not increase the economic burden on any operator or 
increase the scope of the AD.

Explanation of Change to Costs of Compliance

    Since issuance of the NPRM, we have increased the labor rate used 
in the Costs of Compliance from $80 per work-hour to $85 per work-hour. 
The Costs of Compliance information, below, reflects this increase in 
the specified hourly labor rate.

Costs of Compliance

    This AD affects about 154 airplanes of U.S. registry. There are 
between 16 and 17 specific inspections, depending on the applicable 
manual identified in Table 1 of this AD. The inspections take about 53 
work hours per airplane, per inspection cycle, at an average labor rate 
of $85 per work hour. Based on these figures, the estimated cost of 
this AD for U.S. operators is $693,770, or $4,505 per airplane, per 
inspection cycle.

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

    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,

[[Page 9757]]

    (2) Is not a ``significant rule'' under 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.
    You can find our regulatory evaluation and the estimated costs of 
compliance in the AD Docket.

List of Subjects in 14 CFR Part 39

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

Adoption of the Amendment

0
Accordingly, under the authority delegated to me by the Administrator, 
the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority: 49 U.S.C. 106(g), 40113, 44701.

Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new AD:

2010-04-12 Bombardier, Inc.: Amendment 39-16205. Docket No. FAA-
2009-0712; Directorate Identifier 2007-NM-152-AD.

Effective Date

    (a) This airworthiness directive (AD) is effective April 8, 
2010.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Bombardier, Inc. Model DHC-8-101, DHC-8-
102, DHC-8-103, DHC-8-106, DHC-8-201, DHC-8-202, DHC-8-301, DHC-8-
311, and DHC-8-315 airplanes, certificated in any category; serial 
numbers 003 and subsequent.

Subject

    (d) Air Transport Association (ATA) of America Codes 32: Landing 
Gear, 51: Standard Practices/Structures; 52: Doors; 53: Fuselage; 
54: Nacelles/Pylons; 55: Stabilizers; and 57: Wings.

Unsafe Condition

    (e) This AD results from the determination that, as airplanes 
age, they are more likely to exhibit indications of corrosion. We 
are issuing this AD to prevent structural failure of the airplane 
due to corrosion.

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.

Manual References

    (g) This AD refers to the manuals listed in Table 1 of this AD.

                       Table 1--Applicable Manuals
------------------------------------------------------------------------
       Bombardier model                          Manual
------------------------------------------------------------------------
(1) DHC-8-101, -102, -103,     Part 1, Section 3, Structural Inspection
 and -106 airplanes.            Program, of the Bombardier de Havilland
                                Dash 8 Maintenance Program Maintenance
                                Review Board Report Dash 8 Series 100
                                Program Support Manual (PSM) 1-8-7,
                                Revision 22, dated November 1, 2008.
(2) DHC-8-201 and DHC-8-202    Part 1, Section 3, Structural Inspection
 airplanes.                     Program, of the Bombardier de Havilland
                                Dash 8 Maintenance Program Maintenance
                                Review Board Report Dash 8 Series 200
                                PSM 1-82-7, Revision 13, dated November
                                1, 2008.
(3) Model DHC-8-301, DHC-8-    Part 1, Section 3, Structural Inspection
 311, and DHC-8-315 airplanes.  Program, of the Bombardier de Havilland
                                Dash 8 Maintenance Program Maintenance
                                Review Board Report Dash 8 Series 300,
                                PSM 1-83-7, Revision 22, dated November
                                1, 2008.
------------------------------------------------------------------------

Inspections

    (h) At the later of the times specified in paragraphs (h)(1) and 
(h)(2) of this AD, do each of the Environmental Damage/Corrosion 
Protection and Control Program (ED/CPCP) inspections identified with 
both ``ED'' and ``CPCP,'' or with only ``ED,'' including re-
protection tasks, as applicable, which are found in the ``Type of 
Damage'' column of the applicable manual found in Table 1 of this 
AD, in accordance with the applicable manual identified in Table 1 
of this AD. Except as provided by paragraph (i) of this AD, repeat 
each task thereafter at intervals not to exceed the compliance time 
specified in the ``Repeat'' column of the applicable manual 
identified in Table 1 of this AD.
    (1) Within 24 months after the effective date of this AD.
    (2) At the compliance time specified in the ``Threshold'' column 
of the applicable manual identified in Table 1 of this AD since the 
date of issuance of the original Canadian airworthiness certificate 
or the date of issuance of the original Canadian export certificate 
of airworthiness. If there is no value in the ``Threshold'' column, 
use the time specified in the ``Repeat'' column.
    (i) After accomplishment of each initial ED/CPCP and ED task 
required by paragraph (h) of this AD, the FAA may approve the 
incorporation into the operator's approved maintenance/inspection 
program of the CPCP specified in the applicable manual identified in 
Table 1 of this AD; or the equivalent program that is approved in 
accordance with this AD. In all cases, the initial corrosion task 
for each airplane area must be completed by the initial compliance 
time specified in paragraph (h) of this AD.
    (1) Any operator complying with paragraph (i) of this AD may use 
an alternative recordkeeping method to that otherwise required by 
section 91.417 (``Maintenance records'') or section 121.380 
(``Maintenance recording requirements'') of the Federal Aviation 
Regulations (14 CFR 91.417 or 14 CFR 121.380, respectively) for the 
actions required by this AD, provided that the recordkeeping method 
is approved by the FAA and is included in a revision to the 
maintenance/inspection program. For the purposes of this paragraph, 
``the FAA'' is defined as the cognizant Principal Maintenance 
Inspector (PMI) for operators that are assigned a PMI (i.e., part 
121, 125, and 135 operators), and the cognizant Flight Standards 
District Office for other operators (i.e., part 91 operators).
    (2) After the initial accomplishment of the ED/CPCP and ED tasks 
required by paragraph (h) of this AD, any extension of the 
repetitive intervals specified in the manual must be approved by the 
Manager, New York Aircraft Certification Office (ACO), FAA.

Corrective Actions

    (j) If any corrosion is found during accomplishment of any 
action required by paragraph (h) of this AD: Before further flight, 
rework, repair, or replace, as applicable, in accordance with a 
method approved by either the Manager, New York ACO, FAA; or 
Transport Canada Civil Aviation (TCCA) (or its delegated agent).

Reporting Requirements for Level 3 Corrosion Findings

    (k) If any Level 3 corrosion, as defined in Part 1 of the 
Bombardier (de Havilland) DHC-6 Twin Otter, Dash 7 & Dash 8 
Corrosion Prevention and Control Manual, PSM 1-GEN-5, Revision 3, 
dated November 30, 1998, is found during the accomplishment of any 
action required by this AD, do paragraphs (k)(1), (k)(2), and (k)(3) 
of this AD. Under the provisions of the Paperwork Reduction Act (44 
U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has 
approved the information collection requirements and has assigned 
OMB Control Number 2120-0056.
    (1) Within 3 days after the finding of Level 3 corrosion, report 
findings to the Manager, New York ACO, FAA, in accordance with the 
Bombardier (de Havilland) DHC-6 Twin Otter, Dash 7 & Dash 8 
Corrosion Prevention and Control Manual, PSM 1-GEN-5, Revision 3, 
dated November 30, 1998.

[[Page 9758]]

    (2) Within 10 days after the finding of Level 3 corrosion, 
either submit a plan to the FAA to identify a schedule for 
accomplishing the applicable CPCP task on the remainder of the 
airplanes in the operator's fleet that are subject to this AD, or 
provide data substantiating that the Level 3 corrosion that was 
found is an isolated case. The FAA may impose a schedule other than 
that proposed in the plan upon finding that a change to the schedule 
is needed to ensure that any other Level 3 corrosion is detected in 
a timely manner. For the purposes of this paragraph, ``the FAA'' is 
defined as the cognizant Principal Maintenance Inspector (PMI) for 
operators that are assigned a PMI (i.e., part 121, 125, and 135 
operators), and the cognizant Flight Standards District Office for 
other operators (i.e., part 91 operators).
    (3) Within the time schedule approved in accordance with 
paragraph (k)(2) of this AD, accomplish the applicable task on the 
remainder of the airplanes in the operator's fleet that are subject 
to this AD.

Limiting Future Corrosion Findings

    (l) If corrosion findings that exceed Level 1 are found in any 
area during any repeat of any CPCP task after the initial 
accomplishment required by paragraph (h) of this AD: Within 60 days 
after such finding, implement a means approved by the FAA to reduce 
future findings of corrosion in that area to Level 1 or better. For 
the purposes of this paragraph, ``the FAA'' is defined as the 
cognizant PMI for operators that are assigned a PMI (i.e., part 121, 
125, and 135 operators), and the cognizant Flight Standards District 
Office for other operators (i.e., part 91 operators).

Scheduling Corrosion Tasks for Transferred Airplanes

    (m) Before any airplane subject to this AD is transferred and 
placed into service by an operator: Establish a schedule for 
accomplishing the CPCP tasks required by this AD in accordance with 
paragraph (m)(1) or (m)(2) of this AD, as applicable.
    (1) For airplanes on which the CPCP tasks required by this AD 
have been accomplished previously at the schedule established by 
this AD: Perform the first CPCP task in each area in accordance with 
the previous operator's schedule, or in accordance with the new 
operator's schedule, whichever results in an earlier accomplishment 
of that CPCP task. After the initial accomplishment of each CPCP 
task in each area as required by this paragraph, repeat each CPCP 
task in accordance with the new operator's schedule.
    (2) For airplanes on which the CPCP tasks required by this AD 
have not been accomplished previously, or have not been accomplished 
at the schedule established by this AD: The new operator must 
perform each initial CPCP task in each area before further flight or 
in accordance with a schedule approved by the FAA. For the purposes 
of this paragraph, ``the FAA'' is defined as the cognizant Principal 
Maintenance Inspector (PMI) for operators that are assigned a PMI 
(i.e., part 121, 125, and 135 operators), and the cognizant Flight 
Standards District Office for other operators (i.e., part 91 
operators).

Alternative Methods of Compliance (AMOCs)

    (n)(1) 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 ATTN: Program 
Manager, Continuing Operational Safety, FAA, New York ACO, 1600 
Stewart Avenue, Suite 410, Westbury, New York 11590; telephone 516-
228-7300; fax 516-794-5531.
    (2) To request a different method of compliance or a different 
compliance time for this AD, follow the procedures in 14 CFR 39.19. 
Before using any approved AMOC on any airplane to which the AMOC 
applies, notify your principal maintenance inspector (PMI) or 
principal avionics inspector (PAI), as appropriate, or lacking a 
principal inspector, your local Flight Standards District Office. 
The AMOC approval letter must specifically reference this AD.

Related Information

    (o) Canadian airworthiness directive CF-2007-06, dated April 10, 
2007, also addresses the subject of this AD.

Material Incorporated by Reference

    (p) You must use the service information contained in Table 2 of 
this AD, as applicable, to do the actions required by this AD, 
unless the AD specifies otherwise.

                                   Table 2--Material Incorporated by Reference
----------------------------------------------------------------------------------------------------------------
                         Document                            Revision                     Date
----------------------------------------------------------------------------------------------------------------
Part 1, Section 3, Structural Inspection Program, of the           22  November 1, 2008.
 Bombardier de Havilland Dash 8 Maintenance Program
 Maintenance Review Board Report Dash 8 Series 100 Program
 Support Manual (PSM) 1-8-7.
Part 1, Section 3, Structural Inspection Program, of the           13  November 1, 2008.
 Bombardier de Havilland Dash 8 Maintenance Program
 Maintenance Review Board Report Series 200 PSM 1-82-7.
Part 1, Section 3, Structural Inspection Program, of the           22  November 1, 2008.
 Bombardier de Havilland Dash 8 Maintenance Program
 Maintenance Review Board Report Dash 8 Series 300, PSM 1-
 83-7.
Bombardier (de Havilland) DHC-6 Twin Otter, Dash 7 & Dash           3  November 30, 1998.
 8 Corrosion Prevention and Control Manual, PSM 1[dash]GEN-
 5, Part 1.
----------------------------------------------------------------------------------------------------------------

    Bombardier de Havilland Dash 8 Maintenance Program Maintenance 
Review Board Report Dash 8 Series 100 PSM 1-8-7, Revision 22, dated 
November 1, 2008, contains the following effective pages:

                                             List of Effective Pages
----------------------------------------------------------------------------------------------------------------
      Page title/ description           Page number(s)        Revision number          Date shown on page(s)
----------------------------------------------------------------------------------------------------------------
Title Page........................  None shown...........  22...................  November 1, 2008.
List of Effective Pages...........  1-4..................  None shown*..........  November 1, 2008.
Log of Revisions..................  1-18.................  None shown*..........  November 1, 2008.
Record of Revisions...............  1-2..................  22...................  November 1, 2008.
Contents..........................  1-4..................  None shown*..........  November 1, 2008.
Section 3:
    Subject 3-0...................  1-4..................  None shown*..........  November 1, 2008.
    Subject 3-32..................  1-2..................  None shown*..........  November 1, 2008.
    Subject 3-52..................  1-2..................  None shown*..........  November 1, 2008.
    Subject 3-53..................  1-16.................  None shown*..........  November 1, 2008.
    Subject 3-54..................  1-4..................  None shown*..........  November 1, 2008.
    Subject 3-55..................  1-8..................  None shown*..........  November 1, 2008.
    Subject 3-57..................  1-12.................  None shown*..........  November 1, 2008.
----------------------------------------------------------------------------------------------------------------

[[Page 9759]]

    Bombardier de Havilland Dash 8 Maintenance Program Maintenance 
Review Board Report Dash 8 Series 200 PSM 1-82-7, Revision 13, dated 
November 1, 2008, contains the following effective pages:

                                             List of Effective Pages
----------------------------------------------------------------------------------------------------------------
      Page title/ description           Page number(s)        Revision number          Date shown on page(s)
----------------------------------------------------------------------------------------------------------------
Title Page........................  None shown...........  13...................  November 1, 2008.
List of Effective Pages...........  1-4..................  None shown*..........  November 1, 2008.
Log of Revisions..................  1-8..................  None shown*..........  November 1, 2008.
Record of Revisions...............  1-2..................  13...................  November 1, 2008.
Contents..........................  1-4..................  None shown*..........  November 1, 2008.
Section 3:
    Subject 3-0...................  1-4..................  None shown*..........  November 1, 2008.
    Subject 3-32..................  1-2..................  None shown*..........  November 1, 2008.
    Subject 3-52..................  1-2..................  None shown*..........  November 1, 2008.
    Subject 3-53..................  1-16.................  None shown*..........  November 1, 2008.
    Subject 3-54..................  1-4..................  None shown*..........  November 1, 2008.
    Subject 3-55..................  1-6..................  None shown*..........  November 1, 2008.
    Subject 3-57..................  1-12.................  None shown*..........  November 1, 2008.
----------------------------------------------------------------------------------------------------------------

    Bombardier de Havilland Dash 8 Maintenance Program Maintenance 
Review Board Report Dash 8 Series 300 PSM 1-83-7, Revision 22, dated 
November 1, 2008, contains the following effective pages:

                                             List of Effective Pages
----------------------------------------------------------------------------------------------------------------
      Page title/description            Page number(s)        Revision number          Date shown on page(s)
----------------------------------------------------------------------------------------------------------------
Title Page........................  None shown...........  22...................  November 1, 2008.
List of Effective Pages...........  1-4..................  None shown*..........  November 1, 2008.
Log of Revisions..................  1-18.................  None shown*..........  November 1, 2008.
Record of Revisions...............  1-2..................  22...................  November 1, 2008.
Contents..........................  1-4..................  None shown*..........  November 1, 2008.
Section 3:
    Subject 3-0...................  1-4..................  None shown*..........  November 1, 2008.
    Subject 3-32..................  1-2..................  None shown*..........  November 1, 2008.
    Subject 3-52..................  1-2..................  None shown*..........  November 1, 2008.
    Subject 3-53..................  1-18.................  None shown*..........  November 1, 2008.
    Subject 3-54..................  1-4..................  None shown*..........  November 1, 2008.
    Subject 3-55..................  1-8..................  None shown*..........  November 1, 2008.
    Subject 3-57..................  1-12.................  None shown*..........  November 1, 2008.
----------------------------------------------------------------------------------------------------------------
(*Only the title page and Record of Revisions of these documents specify the revision level of these documents.)

    Bombardier (de Havilland) DHC-6 Twin Otter, Dash 7 & Dash 8 
Corrosion Prevention and Control Manual PSM 1-GEN-5, Part 1, 
Revision 3, dated November 30, 1998, contains the following 
effective pages:

                                             List of Effective Pages
----------------------------------------------------------------------------------------------------------------
      Page title/ description           Page number(s)        Revision number          Date shown on page(s)
----------------------------------------------------------------------------------------------------------------
Title Page........................  None shown...........  None shown*..........  November 8, 1993.
Record of Revisions...............  1....................  3....................  August 27, 1991.
                                    2....................  None shown*..........  August 27, 1991.
Part 1 List of Effective Pages....  1-2..................  None shown*..........  November 30, 1998.
Part 1 Table of Contents..........  1-4..................  None shown*..........  November 8, 1993.
Part 1 List of Illustrations......  1-2..................  None shown*..........  November 8, 1993.
Part 1 List of Tables.............  1....................  None shown*..........  November 8, 1993.
                                    2....................  None shown*..........  August 27, 1991.
Introduction......................  1-2..................  None shown*..........  November 8, 1993.
                                    3-4..................  None shown*..........  November 5, 1992.
Chapter 1.........................  1-1 through 1-10.....  None shown*..........  November 8, 1993.
Chapter 2.........................  2-1 through 2-6......  None shown*..........  November 8, 1993.
Chapter 3.........................  3-1 through 3-4......  None shown*..........  November 8, 1993.
Chapter 4.........................  4-1 through 4-44.....  None shown*..........  November 8, 1993.
Chapter 5.........................  5-1 through 5-48.....  None shown*..........  November 8, 1993.
Chapter 6.........................  6-1 through 6-8,.....  None shown*..........  August 27, 1991.
                                    6-11 through 6-16....

[[Page 9760]]

                                    6-9..................  None shown*..........  November 8, 1993.
                                    6-10.................  None shown*..........  November 5, 1992.
Chapter 7.........................  7-1 through 7-2......  None shown*..........  November 8, 1993.
Chapter 8.........................  8-1 through 8-4......  None shown*..........  November 8, 1993.
Chapter 9.........................  9-1 through 9-4......  None shown*..........  November 30, 1998.
----------------------------------------------------------------------------------------------------------------
(*Only page 1 of the Record of Revisions of Bombardier (de Havilland) DHC-6 Twin Otter, Dash 7 & Dash 8
  Corrosion Prevention and Control Manual PSM 1-GEN- 5, Part 1, Revision 3, contains the revision level of this
  document.)

    (1) The Director of the Federal Register approved the 
incorporation by reference of this service information under 5 
U.S.C. 552(a) and 1 CFR part 51.
    (2) For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; telephone 514-855-5000; fax 514-855-
7401; e-mail thd.qseries@aero.bombardier.com; Internet http://
www.bombardier.com.
    (3) You may review copies of the service information at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington. For information on the availability of this material at 
the FAA, call 425-227-1221 or 425-227-1152.
    (4) You may also review copies of the service information that 
is incorporated by reference at the National Archives and Records 
Administration (NARA). For information on the availability of this 
material at NARA, call 202-741-6030, or go to: http://
www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.

    Issued in Renton, Washington, on February 11, 2010.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 2010-3226 Filed 3-3-10; 8:45 am]
BILLING CODE 4910-13-P