Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes, 46317-46319 [E9-20836]

Download as PDF Federal Register / Vol. 74, No. 173 / Wednesday, September 9, 2009 / Rules and Regulations airworthiness.A330-A340@airbus.com; Internet https://www.airbus.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 46317 information on the availability of this material at NARA, call 202–741–6030, or go to: https://www.archives.gov/federal_register/ code_of_federal_regulations/ibr _locations.html. TABLE 4—MATERIAL INCORPORATED BY REFERENCE Service Bulletin Airbus Airbus Airbus Airbus Mandatory Service Bulletin A330–27A3154, excluding Appendix 1 ................................... Mandatory Service Bulletin A340–27A4154, excluding Appendix 1 ................................... Service Bulletin A330–27–3110 .......................................................................................... Service Bulletin A340–27–4115 .......................................................................................... Issued in Renton, Washington, on August 26, 2009. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E9–21408 Filed 9–8–09; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2009–0526; Directorate Identifier 2009–NM–029–AD; Amendment 39–16008; AD 2009–18–12] RIN 2120–AA64 Airworthiness Directives; Bombardier Model DHC–8–400 Series Airplanes 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: jlentini on DSKJ8SOYB1PROD with RULES Revision level Four aircraft have experienced a dual AC [alternating current] generator shutdown, caused by a broken propeller de-ice bus bar which short-circuited with the backplate assembly. * * * A short circuit can cause a dual AC generator shutdown that, particularly in conjunction with an engine failure in icing conditions, could result in reduced controllability of the aircraft. * * * * * Reduced controllability of the airplane in certain operating conditions affects continued safe flight and landing. We are issuing this AD to VerDate Nov<24>2008 16:13 Sep 08, 2009 Jkt 217001 require actions to correct the unsafe condition on these products. DATES: This AD becomes effective October 14, 2009. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of October 14, 2009. ADDRESSES: You may examine the AD docket on the Internet at https:// 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: Wing Chan, Aerospace Engineer, Aerospace Engineer, Systems and Flight Test Branch, ANE–172, FAA, New York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228– 7311; 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 June 10, 2009 (74 FR 27476). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states: Four aircraft have experienced a dual AC [alternating current] generator shutdown, caused by a broken propeller de-ice bus bar which short-circuited with the backplate assembly. It was subsequently determined that any friction or contact between a propeller de-ice bus bar and the backplate assembly can cause an intermittent short circuit. Such a short circuit can cause a dual AC generator shutdown that, particularly in conjunction with an engine failure in icing conditions, could result in reduced controllability of the aircraft. This [Transport Canada Civil Aviation] directive mandates revision of the Airplane Flight Manual (AFM) to introduce a procedure that restores AC power following PO 00000 Frm 00015 Fmt 4700 Sfmt 4700 01 01 03 01 Date July 25, 2008. July 25, 2008. September 3, 2008. March 2, 2007. a failure of No. 1 and No. 2 AC generators with propeller de-ice on. Additionally, in order to prevent similar dual AC generator shutdowns, it mandates the application of sealant as insulation between the propeller de-ice bus bars and the backplate assembly. Reduced controllability of the airplane in certain operating conditions affects continued safe flight and landing. 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 62 products of U.S. registry. We also estimate that it will take about 6 workhours 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 E:\FR\FM\09SER1.SGM 09SER1 46318 Federal Register / Vol. 74, No. 173 / Wednesday, September 9, 2009 / Rules and Regulations cost of this AD to the U.S. operators to be $29,760, or $480 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. jlentini on DSKJ8SOYB1PROD with RULES Examining the AD Docket You may examine the AD docket on the Internet at https:// 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. VerDate Nov<24>2008 16:13 Sep 08, 2009 Jkt 217001 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. § 39.13 [Amended] 2. The FAA amends § 39.13 by adding the following new AD: ■ 2009–18–12 Bombardier, Inc. (Formerly de Havilland, Inc.): Amendment 39–16008. Docket No. FAA–2009–0526; Directorate Identifier 2009–NM–029–AD. Effective Date (a) This airworthiness directive (AD) becomes effective October 14, 2009. Affected ADs (b) None. Subject (d) Air Transport Association (ATA) of America Code 61: Propellers/Propulsors. Reason (e) The mandatory continuing airworthiness information (MCAI) states: Four aircraft have experienced a dual AC [alternating current] generator shutdown, caused by a broken propeller de-ice bus bar which short-circuited with the backplate assembly. It was subsequently determined that any friction or contact between a propeller de-ice bus bar and the backplate assembly can cause an intermittent short circuit. Such a short circuit can cause a dual AC generator shutdown that, particularly in conjunction with an engine failure in icing conditions, could result in reduced controllability of the aircraft. This [Transport Canada Civil Aviation] directive mandates revision of the Airplane Flight Manual (AFM) to introduce a procedure that restores AC power following a failure of No. 1 and No. 2 AC generators with propeller de-ice on. Additionally, in order to prevent similar dual AC generator shutdowns, it mandates the application of sealant as insulation between the propeller de-ice bus bars and the backplate assembly. Reduced controllability of the airplane in certain operating conditions affects continued safe flight and landing. Frm 00016 (f) Unless already done, do the following actions. (1) Within 30 days after the effective date of this AD, revise the Limitations Section of the Bombardier Dash 8 Q400 AFM, PSM 1– 84–1A, by inserting a copy of Bombardier Dash 8 Q400 Temporary Amendment (TA) 14, Issue 1, dated May 10, 2006. When the information in Bombardier TA 14, Issue 1, dated May 10, 2006, is included in the general revisions of the AFM, the general revisions may be inserted in the AFM and the TA may be removed. (2) Within 5,000 flight hours after the effective date of this AD: Apply sealant between the bus bar assemblies and the backplate assembly by incorporating Bombardier DHC–8–400 Modification Summary 4–163047, Revision B, dated August 22, 2008, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84–61–03, Revision ‘A,’ dated September 18, 2008. (3) Incorporating Bombardier DHC–8–400 Modification Summary Package 4–163047 before the effective date of this AD in accordance with Bombardier Service Bulletin 84–61–03, dated April 27, 2007, is considered acceptable for compliance with the requirements of paragraph (f)(2) of this AD. FAA AD Differences Applicability (c) This AD applies to Bombardier Model DHC–8–400, DHC–8–401, and DHC–8–402 series airplanes, certificated in any category, serial numbers 4001, 4003, 4004, 4006, and 4008 through 4154 inclusive. PO 00000 Actions and Compliance Fmt 4700 Sfmt 4700 Note 1: 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 Aircraft Certification Office (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: Wing Chan, Aerospace Engineer, Systems and Flight Test Branch, ANE–172, FAA, New York ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; telephone (516) 228–7311; fax (516) 794–5531. 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. (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 FAAapproved 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. E:\FR\FM\09SER1.SGM 09SER1 Federal Register / Vol. 74, No. 173 / Wednesday, September 9, 2009 / Rules and Regulations Related Information (h) Refer to MCAI Canadian Airworthiness Directive CF–2009–01, dated January 19, 2009; Bombardier Dash 8 Q400 TA 14, Issue 1, dated May 10, 2006; and Bombardier Service Bulletin 84–61–03, Revision ‘A,’ dated September 18, 2008; for related information. Material Incorporated by Reference (i) You must use Bombardier Dash 8 Q400 Temporary Amendment 14, Issue 1, dated May 10, 2006; and Bombardier Service Bulletin 84–61–03, Revision ‘A,’ dated September 18, 2008; as applicable; 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 ˆ this AD, contact Bombardier, Inc., 400 Cote´ Vertu Road West, Dorval, Quebec H4S 1Y9, Canada; telephone 514–855–5000; fax 514– 855–7401; e-mail thd.qseries@aero.bombardier.com; Internet https://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: https://www.archives.gov/federal_register/ code_of_federal_regulations/ ibr_locations.html. Issued in Renton, Washington, on August 18, 2009. Stephen P. Boyd, Acting Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E9–20836 Filed 9–8–09; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2009–0563; Directorate Identifier 2008–NM–180–AD; Amendment 39–16005; AD 2009–18–09] jlentini on DSKJ8SOYB1PROD with RULES Airworthiness Directives; Fokker Model F.28 Mark 0070 and 0100 Airplanes AGENCY: Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. SUMMARY: We are superseding an existing airworthiness directive (AD) for 16:13 Sep 08, 2009 Jkt 217001 A recent design review has been carried out on the F28 Mark 0070/0100 fuel system in accordance with the guidelines related to FAA SFAR 88 [Special Federal Aviation Regulation No. 88] (Fuel Tank Safety Program) and JAA [Joint Aviation Authorities] INT/POL/25/12. The review revealed that under certain failure conditions, prolonged dry running of the fuel transfer pumps may result in an ignition source in the centre wing fuel tank. This condition, if not corrected, could lead to ignition of flammable fuel vapors, resulting in fuel tank explosion and consequent loss of the aircraft. * * * * * We are issuing this AD to require actions to correct the unsafe condition on these products. DATES: This AD becomes effective October 14, 2009. The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of October 14, 2009. On October 27, 1999 (64 FR 51202, September 22, 1999), the Director of the Federal Register approved the incorporation by reference of certain other publications listed in this AD. ADDRESSES: You may examine the AD docket on the Internet at https:// 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: Tom Rodriguez, Aerospace Engineer, International Branch, ANM–116, Transport Airplane Directorate, FAA, 1601 Lind Avenue, SW., Renton, Washington 98057–3356; telephone (425) 227–1137; fax (425) 227–1149. SUPPLEMENTARY INFORMATION: Discussion RIN 2120–AA64 VerDate Nov<24>2008 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: 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 June 19, 2009 (74 FR 29144), and proposed to supersede AD 99–20– 01, Amendment 39–11329 (64 FR 51202, September 22, 1999). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states: PO 00000 Frm 00017 Fmt 4700 Sfmt 4700 46319 A recent design review has been carried out on the F28 Mark 0070/0100 fuel system in accordance with the guidelines related to FAA SFAR 88 [Special Federal Aviation Regulation No. 88] (Fuel Tank Safety Program) and JAA [Joint Aviation Authorities] INT/POL/25/12. The review revealed that under certain failure conditions, prolonged dry running of the fuel transfer pumps may result in an ignition source in the centre wing fuel tank. This condition, if not corrected, could lead to ignition of flammable fuel vapors, resulting in fuel tank explosion and consequent loss of the aircraft. To address and correct this unsafe condition, new software (version V13.55) has been developed for the Flight Warning Computer (FWC). This software update introduces a decreased time delay of the centre wing fuel tank low pressure alert from 15 minutes to 60 seconds, to stop prolonged dry running of the fuel transfer pumps. For the reasons described above, this EASA Airworthiness Directive (AD) requires the replacement of the FWC with a modified unit, incorporating software version V13.55. The corrective actions include revising the airplane flight manual (AFM) to change certain indications and warnings; installing new software for the multifunction display unit (MFDU); and installing a new resistor in the thrust reverser indicator and control system, or an improved thrust reverser unlock indication relay. 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. E:\FR\FM\09SER1.SGM 09SER1

Agencies

[Federal Register Volume 74, Number 173 (Wednesday, September 9, 2009)]
[Rules and Regulations]
[Pages 46317-46319]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E9-20836]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2009-0526; Directorate Identifier 2009-NM-029-AD; 
Amendment 39-16008; AD 2009-18-12]
RIN 2120-AA64


Airworthiness Directives; Bombardier Model DHC-8-400 Series 
Airplanes

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:

    Four aircraft have experienced a dual AC [alternating current] 
generator shutdown, caused by a broken propeller de-ice bus bar 
which short-circuited with the backplate assembly.
    * * * A short circuit can cause a dual AC generator shutdown 
that, particularly in conjunction with an engine failure in icing 
conditions, could result in reduced controllability of the aircraft.

* * * * *
    Reduced controllability of the airplane in certain operating 
conditions affects continued safe flight and landing. We are issuing 
this AD to require actions to correct the unsafe condition on these 
products.

DATES: This AD becomes effective October 14, 2009.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of October 14, 
2009.

ADDRESSES: You may examine the AD docket on the Internet at https://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: Wing Chan, Aerospace Engineer, 
Aerospace Engineer, Systems and Flight Test Branch, ANE-172, FAA, New 
York Aircraft Certification Office, 1600 Stewart Avenue, Suite 410, 
Westbury, New York 11590; telephone (516) 228-7311; 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 June 10, 2009 (74 FR 
27476). That NPRM proposed to correct an unsafe condition for the 
specified products. The MCAI states:

    Four aircraft have experienced a dual AC [alternating current] 
generator shutdown, caused by a broken propeller de-ice bus bar 
which short-circuited with the backplate assembly.
    It was subsequently determined that any friction or contact 
between a propeller de-ice bus bar and the backplate assembly can 
cause an intermittent short circuit. Such a short circuit can cause 
a dual AC generator shutdown that, particularly in conjunction with 
an engine failure in icing conditions, could result in reduced 
controllability of the aircraft.
    This [Transport Canada Civil Aviation] directive mandates 
revision of the Airplane Flight Manual (AFM) to introduce a 
procedure that restores AC power following a failure of No. 1 and 
No. 2 AC generators with propeller de-ice on. Additionally, in order 
to prevent similar dual AC generator shutdowns, it mandates the 
application of sealant as insulation between the propeller de-ice 
bus bars and the backplate assembly.

    Reduced controllability of the airplane in certain operating 
conditions affects continued safe flight and landing. 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 62 products of U.S. registry. 
We also estimate that it will take about 6 work-hours 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

[[Page 46318]]

cost of this AD to the U.S. operators to be $29,760, or $480 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 https://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

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:

2009-18-12 Bombardier, Inc. (Formerly de Havilland, Inc.): Amendment 
39-16008. Docket No. FAA-2009-0526; Directorate Identifier 2009-NM-
029-AD.

Effective Date

    (a) This airworthiness directive (AD) becomes effective October 
14, 2009.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to Bombardier Model DHC-8-400, DHC-8-401, 
and DHC-8-402 series airplanes, certificated in any category, serial 
numbers 4001, 4003, 4004, 4006, and 4008 through 4154 inclusive.

Subject

    (d) Air Transport Association (ATA) of America Code 61: 
Propellers/Propulsors.

Reason

    (e) The mandatory continuing airworthiness information (MCAI) 
states:
    Four aircraft have experienced a dual AC [alternating current] 
generator shutdown, caused by a broken propeller de-ice bus bar 
which short-circuited with the backplate assembly.
    It was subsequently determined that any friction or contact 
between a propeller de-ice bus bar and the backplate assembly can 
cause an intermittent short circuit. Such a short circuit can cause 
a dual AC generator shutdown that, particularly in conjunction with 
an engine failure in icing conditions, could result in reduced 
controllability of the aircraft.
    This [Transport Canada Civil Aviation] directive mandates 
revision of the Airplane Flight Manual (AFM) to introduce a 
procedure that restores AC power following a failure of No. 1 and 
No. 2 AC generators with propeller de-ice on. Additionally, in order 
to prevent similar dual AC generator shutdowns, it mandates the 
application of sealant as insulation between the propeller de-ice 
bus bars and the backplate assembly.
    Reduced controllability of the airplane in certain operating 
conditions affects continued safe flight and landing.

Actions and Compliance

    (f) Unless already done, do the following actions.
    (1) Within 30 days after the effective date of this AD, revise 
the Limitations Section of the Bombardier Dash 8 Q400 AFM, PSM 1-84-
1A, by inserting a copy of Bombardier Dash 8 Q400 Temporary 
Amendment (TA) 14, Issue 1, dated May 10, 2006. When the information 
in Bombardier TA 14, Issue 1, dated May 10, 2006, is included in the 
general revisions of the AFM, the general revisions may be inserted 
in the AFM and the TA may be removed.
    (2) Within 5,000 flight hours after the effective date of this 
AD: Apply sealant between the bus bar assemblies and the backplate 
assembly by incorporating Bombardier DHC-8-400 Modification Summary 
4-163047, Revision B, dated August 22, 2008, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 84-61-03, 
Revision `A,' dated September 18, 2008.
    (3) Incorporating Bombardier DHC-8-400 Modification Summary 
Package 4-163047 before the effective date of this AD in accordance 
with Bombardier Service Bulletin 84-61-03, dated April 27, 2007, is 
considered acceptable for compliance with the requirements of 
paragraph (f)(2) of this AD.

FAA AD Differences

    Note 1:  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 Aircraft Certification Office (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: Wing Chan, Aerospace 
Engineer, Systems and Flight Test Branch, ANE-172, FAA, New York 
ACO, 1600 Stewart Avenue, Suite 410, Westbury, New York 11590; 
telephone (516) 228-7311; fax (516) 794-5531. 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.
    (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.

[[Page 46319]]

Related Information

    (h) Refer to MCAI Canadian Airworthiness Directive CF-2009-01, 
dated January 19, 2009; Bombardier Dash 8 Q400 TA 14, Issue 1, dated 
May 10, 2006; and Bombardier Service Bulletin 84-61-03, Revision 
`A,' dated September 18, 2008; for related information.

Material Incorporated by Reference

    (i) You must use Bombardier Dash 8 Q400 Temporary Amendment 14, 
Issue 1, dated May 10, 2006; and Bombardier Service Bulletin 84-61-
03, Revision `A,' dated September 18, 2008; as applicable; 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., 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 https://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: https://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.

    Issued in Renton, Washington, on August 18, 2009.
Stephen P. Boyd,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. E9-20836 Filed 9-8-09; 8:45 am]
BILLING CODE 4910-13-P
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