Tdata AD

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2008-09-25	BOMBARDIER, INC. (FORMERLY DE HAVILLAND, INC.): Amendment 39-15506. Docket No. FAA-2008-0266; Directorate Identifier 2008-NM-013-AD.

EFFECTIVE DATE

(a) This airworthiness directive (AD) becomes effective June 6, 2008.

AFFECTED ADS

(b) None.

APPLICABILITY

(c) This AD  applies to all  Bombardier Model 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, all serial numbers.

SUBJECT

(d) Air Transport Association (ATA) of America Code 28: Fuel.

REASON

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

    Bombardier  Aerospace  has completed  a  system safety  review  of the
    aircraft fuel system against fuel tank safety standards introduced  in
    Chapter 525  of the  Airworthiness Manual  through Notice  of Proposed
    Amendment  (NPA) 2002-043.  The identified  non-compliances were  then
    assessed  using  Transport  Canada  Policy  Letter  No.  525-001,   to
    determine if mandatory corrective action is required.

    The  assessment  showed that  it  is necessary  to  introduce Critical
    Design Configuration Control Limitations (CDCCL), in order to preserve
    critical fuel tank system  ignition source prevention features  during
    configuration changes  such as  modifications and  repairs, or  during
    maintenance actions.  Failure to  preserve critical  fuel tank  system
    ignition  source  prevention  features could  result  in  a fuel  tank
    explosion.  Revisions  have  been   made  to  Part  2   "Airworthiness
    Limitations List" of the  Maintenance Program Manuals of  the affected
    aircraft models to introduce the required CDCCL.

    The  corrective  action  is  revising  the  Airworthiness  Limitations
    Section of the Instructions for Continued Airworthiness to include the
    CDCCL data.

ACTIONS AND COMPLIANCE

(f) Unless already done, do the following actions.

(1) For all airplanes: Within 60 days after the effective date of this AD,
    or  before  December  16, 2008,  whichever  occurs  first, revise  the
    Airworthiness Limitations  section of  the Instructions  for Continued
    Airworthiness  to  incorporate  the   CDCCL  data  specified  in   the
    applicable  temporary  revision  (TR)  to  the  applicable maintenance
    program manual (MPM). The TRs are listed in Table 1 of this AD.

                        TABLE 1.--TEMPORARY REVISIONS
    ______________________________________________________________________
    MODEL            DE HAVILLAND TR         MAINTENANCE PROGRAM MANUAL
    ______________________________________________________________________
    DHC-8-102,       AWL-98, dated       Part 2,"Airworthiness Limitations
    DHC-8-103,       April 12, 2006      List," of de Havilland Dash 8
    and DHC-8-106                        Series 100 MPM, Product Support
    airplanes                            Manual (PSM) 1-8-7

    DHC-8-201,       AWL 2-35, dated     Part 2,"Airworthiness Limitations
    and DHC-8-202    April 12, 2006      List," of de Havilland Dash 8
    airplanes                            Series 200 MPM, PSM 1-82-7

    DHC-8-301,       AWL 3-103, dated    Part 2,"Airworthiness Limitations
    DHC-8-311,       April 12, 2006      List," of de Havilland Dash 8
    and DHC-8-315                        Series 300 MPM, PSM 1-83-7
    airplanes
    ______________________________________________________________________

NOTE 1: The revisions required by paragraph (f)(1) of this AD may be  done
by inserting a copy of  the applicable TR into the  applicable maintenance
program manual. When the TR has  been included in the general revision  of
the maintenance  program, the  general revision  may be  inserted into the
maintenance  program  manual,  provided the  relevant  information  in the
general  revision  is  identical to  that in  the applicable  TR, and  the
temporary revision may be removed.

(2) After accomplishing the actions specified in paragraph (f)(1) of  this
    AD, no alternative CDCCLs may be used unless the CDCCLs are part of  a
    later revision  of Part  2, "Airworthiness  Limitations List,"  of the
    applicable de Havilland Dash  8 Series MPM listed  in Table 2 of  this
    AD, that is approved by  the Manager, New York Aircraft  Certification
    Office  (ACO),  FAA,  or  Transport  Canada  Civil  Aviation  (or  its
    delegated agent); or unless the CDCCLs are approved as an  alternative
    method  of  compliance  (AMOC)  in  accordance  with  the   procedures
    specified in paragraph (g)(1) of this AD.

                                TABLE 2.--MPMS
    ______________________________________________________________________
            MODEL                               MPM
    ______________________________________________________________________
    DHC-8-102, DHC-8-103,      Part 2,"Airworthiness Limitations List,"
    and DHC-8-106 airplanes    Revision 17, dated April 19, 2005, of de
                               Havilland Dash 8 Series 100 MPM, PSM 1-8-7

    DHC-8-201, and             Part 2,"Airworthiness Limitations List,"
    DHC-8-202 airplanes        Revision 5, dated August 15, 2001, of de
                               Havilland Dash 8 Series 200 MPM, PSM 1-82-7

    DHC-8-301, DHC-8-311,      Part 2,"Airworthiness Limitations List,"
    and DHC-8-315 airplanes    Revision 16, dated August 15, 2001, of de
                               Havilland Dash 8 Series 300 MPM, PSM 1-83-7
    ______________________________________________________________________

FAA AD DIFFERENCES

NOTE 2: This  AD differs  from  the  MCAI  and/or  service information  as
follows: No differences.

OTHER FAA AD PROVISIONS

(g) The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs): The Manager, New York  ACO,
    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:
    Mazdak  Hobbi, Aerospace  Engineer, Airframe   and Propulsion  Branch,
    ANE-171, FAA,  New York  Aircraft Certification  Office, 1600  Stewart
    Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7330;
    fax (516) 794-5531. Before using any approved AMOC on any airplane  to
    which the  AMOC applies,  notify your  appropriate principal inspector
    (PI) in the FAA Flight Standards District Office (FSDO), or lacking  a
    PI, your local FSDO.

(2) Airworthy Product: For any requirement in this AD to obtain corrective
    actions from a manufacturer or other source, use these actions if they
    are FAA-approved.  Corrective actions  are considered  FAA-approved if
    they are approved by the State of Design Authority (or their delegated
    agent). You are required to assure the product is airworthy before  it
    is returned to service.

(3) Reporting Requirements:  For any  reporting requirement  in  this  AD,
    under the  provisions of  the Paperwork  Reduction Act,  the Office of
    Management and  Budget (OMB)  has approved  the information collection
    requirements and has assigned OMB Control Number 2120-0056.

RELATED INFORMATION

(h) Refer  to  MCAI Canadian  Airworthiness  Directive  CF-2008-03,  dated
    January 3,  2008, and  the TRs  specified in  Table 1  of this AD, for
    related information.

MATERIAL INCORPORATED BY REFERENCE

(i) You must use the service  information specified in Table 3 of  this AD
    to  do  the actions  required  by this  AD,  unless the  AD  specifies
    otherwise.

(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., Bombardier  Regional Aircraft  Division, 123  Garratt Boulevard,
    Downsview, Ontario M3K 1Y5, Canada.

(3) You may review copies at the FAA, Transport Airplane Directorate, 1601
    Lind Avenue, SW., Renton, Washington; or 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.

                 TABLE 3.--MATERIAL INCORPORATED BY REFERENCE
    ______________________________________________________________________
    DE HAVILLAND
    TEMPORARY
    REVISION –       DATED –                    TO –
    ______________________________________________________________________
    AWL-98      April 12, 2006   Part 2, "Airworthiness Limitations List,"
                                 of de Havilland Dash 8 Series 100
                                 Maintenance Program Manual, Product
                                 Support Manual 1-8-7

    AWL 2-35    April 12, 2006   Part 2, "Airworthiness Limitations List,"
                                 of de Havilland Dash 8 Series 200
                                 Maintenance Program Manual, Product
                                 Support Manual 1-82-7

    AWL 3-103   April 12, 2006   Part 2, "Airworthiness Limitations List,"
                                 of de Havilland Dash 8 Series 300
                                 Maintenance Program Manual, Product
                                 Support Manual 1-83-7
    ______________________________________________________________________

Issued in  Renton, Washington,  on April  24, 2008.  Ali Bahrami, Manager,
Transport Airplane Directorate, Aircraft Certification Service.

FOR  FURTHER  INFORMATION  CONTACT:  Mazdak  Hobbi,  Aerospace   Engineer,
Airframe  and   Propulsion  Branch,   ANE-171,  FAA,   New  York  Aircraft
Certification Office, 1600 Stewart  Avenue, Suite 410, Westbury,  New York
11590; telephone (516) 228-7330; fax (516) 794-5531.

PREAMBLE

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

ACTION: Final rule.

SUMMARY: We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Bombardier Aerospace has completed a system safety review of the aircraft fuel system against fuel tank safety standards introduced in Chapter 525 of the Airworthiness Manual through Notice of Proposed Amendment (NPA) 2002-043. The identified non-compliances were then assessed using Transport Canada Policy Letter No. 525-001, to determine if mandatory corrective action is required.

The assessment showed that it is necessary to introduce Critical Design Configuration Control Limitations (CDCCL), in order to preserve critical fuel tank system ignition source prevention features during configuration changes such as modifications and repairs, or during maintenance actions. Failure to preserve critical fuel tank system ignition source prevention features could result in a fuel tank explosion. * * *

We are issuing this AD to require actions to correct the unsafe condition on these products.

DATES: This AD becomes effective June 6, 2008.

The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of June 6, 2008.

ADDRESSES: You may examine the AD docket on the Internet at http:// www.regulations.gov or in person at the U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC.

FOR FURTHER INFORMATION CONTACT: Mazdak Hobbi, Aerospace Engineer, Airframe and Propulsion Branch, ANE-171, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228-7330; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on March 11, 2008 (73 FR 12912). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states:

The corrective action is revising the Airworthiness Limitations Section of the Instructions for Continued Airworthiness to include the CDCCL data. You may obtain further information by examining the MCAI in the AD docket.

Comments

We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM or on the determination of the cost to the public.

Conclusion

We reviewed the available data and determined that air safety and the public interest require adopting the AD as proposed.

Differences Between This AD and the MCAI or Service Information

We have reviewed the MCAI and related service information and, in general, agree with their substance. But we might have found it necessary to use different words from those in the MCAI to ensure the AD is clear for U.S. operators and is enforceable. In making these changes, we do not intend to differ substantively from the information provided in the MCAI and related service information.

We might also have required different actions in this AD from those in the MCAI in order to follow our FAA policies. Any such differences are highlighted in a NOTE within the AD.

Costs of Compliance

We estimate that this AD will affect about 118 products of U.S. registry. We also estimate that it will take about 1 work-hour per product to comply with the basic requirements of this AD. The average labor rate is $80 per work-hour. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $9,440, or $80 per product.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to issue rules on aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. "Subtitle VII: Aviation Programs," describes in more detail the scope of the Agency's authority.

We are issuing this rulemaking under the authority described in "Subtitle VII, Part A, Subpart III, Section 44701: General requirements." Under that section, Congress charges the FAA with promoting safe flight of civil aircraft in air commerce by prescribing regulations for practices, methods, and procedures the Administrator finds necessary for safety in air commerce. This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action.

Regulatory Findings

We determined that this 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 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); and

3. Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

We prepared a regulatory evaluation of the estimated costs to comply with this AD and placed it in the AD docket.

Examining the AD Docket

You may examine the AD docket on the Internet at http:// www.regulations.gov; or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains the NPRM, 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.

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

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

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

Sec. 39.13 [Amended]

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