Airworthiness Directives; 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, and Model DHC-8-400 Series Airplanes, 65476-65478 [E7-22728]

Download as PDF 65476 Federal Register / Vol. 72, No. 224 / Wednesday, November 21, 2007 / Proposed Rules Bombardier, Inc. (Formerly Canadair): Docket No. FAA–2007–0215; Directorate Identifier 2007–NM–216–AD. Comments Due Date (a) The FAA must receive comments on this AD action by December 21, 2007. DEPARTMENT OF TRANSPORTATION [Docket No. FAA–2007–0213; Directorate Identifier 2007–NM–233–AD] Inspection and Corrective Action Affected ADs (b) This AD supersedes AD 2006–17–14. Applicability (c) This AD applies to Bombardier Model CL–600–2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category; serial numbers 7003 through 7990 inclusive, and 8000 through 8070 inclusive. Unsafe Condition (d) This AD results from incidents of short circuit failures of certain alternating current (AC) contactors located in the avionics bay. We are issuing this AD to prevent short circuit failures of certain AC contactors, which could result in arcing and consequent smoke or fire. Compliance (e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done. Requirements of AD 2006–17–14 mstockstill on PROD1PC66 with PROPOSALS Drawing Number K601R50180, dated June 2, 2006; or Bombardier Service Bulletin 601R– 24–122, dated June 27, 2006; are considered acceptable for compliance with the actions specified in paragraph (f) of this AD. New Requirements of This AD the following new airworthiness directive (AD): Inspection and Corrective Action (f) Within 800 flight hours or four months after September 7, 2006 (the effective date of AD 2006–17–14), whichever occurs first: Do a general visual inspection of AC bus contactors 1K4XD and 2K4XD, part number (P/N) D–18ZZA, and the bus contactor K4XA, P/N D–7GRZ, to determine which contactors have an Ultem 2200 terminal base plate (i.e., the plate is made from a black molded thermal plastic material), and apply RTV sealant to the terminal base plate, as applicable, by doing all the actions specified in the Accomplishment Instructions of Bombardier Service Bulletin 601R–24–122, Revision A, dated July 13, 2006. Do all applicable applications of sealant before further flight. Note 1: For the purposes of this AD, a general visual inspection is: ‘‘A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.’’ (h) Within 12 months after the effective date of this AD, do a general visual inspection, reidentification, and corrective actions, as applicable, by doing all the applicable actions specified in the Accomplishment Instructions of Bombardier Service Bulletin 601R–24–123, Revision B, dated February 16, 2007. Do the applicable corrective action before further flight. Accomplishment of these actions constitutes terminating action for the requirements of this AD. Parts Installation (i) As of the effective date of this AD, no person may install any AC contactor 1K4XD, 2K4XD, or K4XA, having a non-G9 melamine terminal base plate, on any airplane. Alternative Methods of Compliance (AMOCs) (j)(1) The Manager, New York Aircraft Certification Office, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19. (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 appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO. Related Information (k) Canadian airworthiness directive CF– 2006–17R1, dated May 30, 2007, also addresses the subject of this AD. Issued in Renton, Washington, on November 13, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–22726 Filed 11–20–07; 8:45 am] BILLING CODE 4910–13–P Previous Actions Accomplished According to Other Service Information (g) Actions accomplished before September 7, 2006, in accordance with Bombardier VerDate Aug<31>2005 16:47 Nov 20, 2007 Jkt 214001 PO 00000 Frm 00007 Fmt 4702 Sfmt 4702 Federal Aviation Administration 14 CFR Part 39 RIN 2120–AA64 Airworthiness Directives; 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, and Model DHC–8–400 Series Airplanes Federal Aviation Administration (FAA), DOT. ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed 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: Several cases have been reported where the pilot, co-pilot or observer utility light system has failed, resulting in a burning smell within the cockpit. An investigation has revealed that, due to the orientation and location of the carbon molded potentiometers used to control the intensity of the light, the potentiometers can fail and overheat in such a way that burning of the ceiling panel and the associated insulation blanket could occur. This could lead to the presence of smoke in the cockpit, requiring that the pilots carry out the appropriate emergency procedure. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI. DATES: We must receive comments on this proposed AD by December 21, 2007. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: (202) 493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–40, 1200 New Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. E:\FR\FM\21NOP1.SGM 21NOP1 Federal Register / Vol. 72, No. 224 / Wednesday, November 21, 2007 / Proposed 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 this proposed AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Operations office (telephone (800) 647–5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt. FOR FURTHER INFORMATION CONTACT: Wing Chan, 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: Comments Invited We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ‘‘Docket No. FAA–2007–0213; Directorate Identifier 2007–NM–233–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD based on those comments. We will post all comments we receive, without change, to https:// www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact we receive about this proposed AD. mstockstill on PROD1PC66 with PROPOSALS Discussion Transport Canada Civil Aviation (TCCA), which is the aviation authority for Canada, has issued Canadian Airworthiness Directive CF–2007–11, dated August 9, 2007 (referred to after this as ‘‘the MCAI’’), to correct an unsafe condition for the specified products. The MCAI states: Several cases have been reported where the pilot, co-pilot or observer utility light system has failed, resulting in a burning smell within the cockpit. An investigation has revealed that, due to the orientation and location of the carbon molded potentiometers used to control the intensity of the light, the potentiometers can fail and overheat in such a way that burning of the ceiling panel and the associated insulation blanket could occur. This could lead to the presence of smoke in the cockpit, requiring that the pilots VerDate Aug<31>2005 16:47 Nov 20, 2007 Jkt 214001 carry out the appropriate emergency procedure. Corrective actions include replacing the affected carbon molded resistive element potentiometers with wirewound type potentiometers, for the pilot, co-pilot, and, if applicable, observer utility lights. You may obtain further information by examining the MCAI in the AD docket. Relevant Service Information Bombardier has issued Service Bulletins 8–33–53, Revision A; and 84– 33–10, Revision A; both dated March 14, 2007. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI. FAA’s Determination and Requirements of This Proposed AD This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to our bilateral agreement with the State of Design Authority, we have been notified of the unsafe condition described in the MCAI and service information referenced above. We are proposing this AD because we evaluated all pertinent information and determined an unsafe condition exists and is likely to exist or develop on other products of the same type design. 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 proposed different actions in this AD from those in the MCAI in order to follow FAA policies. Any such differences are highlighted in a NOTE within the proposed AD. Costs of Compliance Based on the service information, we estimate that this proposed AD would affect about 186 products of U.S. registry. We also estimate that it would take about 3 work-hours per product to comply with the basic requirements of this proposed AD. The average labor rate is $80 per work-hour. Required parts would cost about $0 per product. Where the service information lists required parts costs that are covered PO 00000 Frm 00008 Fmt 4702 Sfmt 4702 65477 under warranty, we have assumed that there will be no charge for these costs. As we do not control warranty coverage for affected parties, some parties may incur costs higher than estimated here. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $44,640, or $240 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 proposed AD would not have federalism implications under Executive Order 13132. This proposed AD would not have a substantial direct effect on the States, on the relationship between the national Government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify this proposed regulation: 1. Is not a ‘‘significant regulatory action’’ under Executive Order 12866; 2. Is not a ‘‘significant rule’’ under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); 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 proposed AD and placed it in the AD docket. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. E:\FR\FM\21NOP1.SGM 21NOP1 65478 Federal Register / Vol. 72, No. 224 / Wednesday, November 21, 2007 / Proposed Rules The Proposed Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows: PART 39—AIRWORTHINESS DIRECTIVES 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: Bombardier, Inc. (Formerly de Havilland, Inc.): Docket No. FAA–2007–0213; Directorate Identifier 2007–NM–233–AD. Comments Due Date (a) We must receive comments by December 21, 2007. FAA AD Differences Applicability (c) This AD applies to 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, serial numbers 003 through 639; and Model DHC– 8–400 series airplanes, serial numbers 4003, 4004, 4006, and 4008 through 4149; certificated in any category. Subject (d) Air Transport Association (ATA) of America Code 33: Lights. Reason (e) The mandatory continuing airworthiness information (MCAI) states: Several cases have been reported where the pilot, co-pilot or observer utility light system has failed, resulting in a burning smell within the cockpit. An investigation has revealed that, due to the orientation and location of the carbon molded potentiometers used to control the intensity of the light, the potentiometers can fail and overheat in such a way that burning of the ceiling panel and the associated insulation blanket could occur. This could lead to the presence of smoke in the cockpit, requiring that the pilots carry out the appropriate emergency procedure. mstockstill on PROD1PC66 with PROPOSALS Corrective actions include replacing the affected carbon molded resistive element potentiometers with wire-wound type potentiometers, for the pilot, co-pilot, and, if applicable, observer utility lights. Actions and Compliance (f) Within 18 months after the effective date of this AD, unless already done, do the following actions. (1) For 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: Install Bombardier Modsum 8Q101603 to replace the affected carbon molded resistive element potentiometers 16:47 Nov 20, 2007 Jkt 214001 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 Aircraft Certification Office, 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 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–2007–11, dated August 9, 2007; Bombardier Service Bulletin 8–33–53, Revision A, dated March 14, 2007; and Bombardier Service Bulletin 84–33–10, Revision A, dated March 14, 2007; for related information. PO 00000 Frm 00009 Fmt 4702 Issued in Renton, Washington, on November 13, 2007. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E7–22728 Filed 11–20–07; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2007–0214; Directorate Identifier 2007–NM–224–AD] RIN 2120–AA64 Airworthiness Directives; McDonnell Douglas Model 717–200 Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). AGENCY: Note: This AD differs from the MCAI and/ or service information as follows: No difference. Affected ADs (b) None. VerDate Aug<31>2005 with wire-wound type potentiometers, for both the pilot and co-pilot utility lights, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8–33–53, Revision A, dated March 14, 2007. (2) For Model DHC–8–400 series airplanes: Install Bombardier Modsum 4–126381 to replace the affected carbon molded resistive element potentiometers with wire-wound type potentiometers, for the pilot, co-pilot, and observer utility lights, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84–33–10, Revision A, dated March 14, 2007. (3) Actions done before the effective date of this AD in accordance with Bombardier Service Bulletin 8–33–53 or 84–33–10, both dated December 1, 2006, as applicable, are considered acceptable for compliance with the corresponding actions specified in this AD. Sfmt 4702 SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain McDonnell Douglas Model 717– 200 airplanes. This proposed AD would require installing an additional support bracket for the gray water drain hose, replacing the screw of the support bracket with a new screw for the potable water supply hose, installing a spacer, doing a detailed inspection to detect interference or wear damage on hoses, lines and/or cables, and doing corrective actions if necessary. This proposed AD results from reports of interference between the potable water supply hose and/or gray water drain hose at the aft lavatories with the fuel line and/or power feeder cables of the auxiliary power unit (APU) located below the aft cabin floor. We are proposing this AD to prevent interference and chafing between the potable water supply hose and/or gray water hose with the fuel line and/or power feeder cables of the APU, which may cause arcing and sparking, and/or fuel leaking, and consequent fire or explosion. DATES: We must receive comments on this proposed AD by January 7, 2008. ADDRESSES: You may send comments by any of the following methods: • Federal eRulemaking Portal: Go to https://www.regulations.gov. Follow the instructions for submitting comments. • Fax: 202–493–2251. • Mail: U.S. Department of Transportation, Docket Operations, M– 30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue, SE., Washington, DC 20590. • Hand Delivery: U.S. Department of Transportation, Docket Operations, M– E:\FR\FM\21NOP1.SGM 21NOP1

Agencies

[Federal Register Volume 72, Number 224 (Wednesday, November 21, 2007)]
[Proposed Rules]
[Pages 65476-65478]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-22728]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2007-0213; Directorate Identifier 2007-NM-233-AD]
RIN 2120-AA64


Airworthiness Directives; 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, and Model DHC-8-400 Series Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: We propose to adopt a new airworthiness directive (AD) for the 
products listed above. This proposed 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:

    Several cases have been reported where the pilot, co-pilot or 
observer utility light system has failed, resulting in a burning 
smell within the cockpit. An investigation has revealed that, due to 
the orientation and location of the carbon molded potentiometers 
used to control the intensity of the light, the potentiometers can 
fail and overheat in such a way that burning of the ceiling panel 
and the associated insulation blanket could occur. This could lead 
to the presence of smoke in the cockpit, requiring that the pilots 
carry out the appropriate emergency procedure.

The proposed AD would require actions that are intended to address the 
unsafe condition described in the MCAI.

DATES: We must receive comments on this proposed AD by December 21, 
2007.

ADDRESSES: You may send comments by any of the following methods:
     Federal eRulemaking Portal: Go to https://
www.regulations.gov. Follow the instructions for submitting comments.
     Fax: (202) 493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue, SE., Washington, DC 20590.
     Hand Delivery: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-40, 1200 New 
Jersey Avenue, SE., Washington, DC, between 9 a.m. and 5 p.m., Monday 
through Friday, except Federal holidays.

[[Page 65477]]

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 this proposed AD, the regulatory 
evaluation, any comments received, and other information. The street 
address for the Docket Operations office (telephone (800) 647-5527) is 
in the ADDRESSES section. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Wing Chan, 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:

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2007-0213; 
Directorate Identifier 2007-NM-233-AD'' at the beginning of your 
comments. We specifically invite comments on the overall regulatory, 
economic, environmental, and energy aspects of this proposed AD. We 
will consider all comments received by the closing date and may amend 
this proposed AD based on those comments.
    We will post all comments we receive, without change, to https://
www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this proposed AD.

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2007-11, dated August 9, 2007 (referred to after this as ``the MCAI''), 
to correct an unsafe condition for the specified products. The MCAI 
states:

    Several cases have been reported where the pilot, co-pilot or 
observer utility light system has failed, resulting in a burning 
smell within the cockpit. An investigation has revealed that, due to 
the orientation and location of the carbon molded potentiometers 
used to control the intensity of the light, the potentiometers can 
fail and overheat in such a way that burning of the ceiling panel 
and the associated insulation blanket could occur. This could lead 
to the presence of smoke in the cockpit, requiring that the pilots 
carry out the appropriate emergency procedure.

Corrective actions include replacing the affected carbon molded 
resistive element potentiometers with wire-wound type potentiometers, 
for the pilot, co-pilot, and, if applicable, observer utility lights. 
You may obtain further information by examining the MCAI in the AD 
docket.

Relevant Service Information

    Bombardier has issued Service Bulletins 8-33-53, Revision A; and 
84-33-10, Revision A; both dated March 14, 2007. The actions described 
in this service information are intended to correct the unsafe 
condition identified in the MCAI.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of the same 
type design.

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 proposed different actions in this AD from those 
in the MCAI in order to follow FAA policies. Any such differences are 
highlighted in a NOTE within the proposed AD.

Costs of Compliance

    Based on the service information, we estimate that this proposed AD 
would affect about 186 products of U.S. registry. We also estimate that 
it would take about 3 work-hours per product to comply with the basic 
requirements of this proposed AD. The average labor rate is $80 per 
work-hour. Required parts would cost about $0 per product. Where the 
service information lists required parts costs that are covered under 
warranty, we have assumed that there will be no charge for these costs. 
As we do not control warranty coverage for affected parties, some 
parties may incur costs higher than estimated here. Based on these 
figures, we estimate the cost of the proposed AD on U.S. operators to 
be $44,640, or $240 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 proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would not 
have a substantial direct effect on the States, on the relationship 
between the national Government and the States, or on the distribution 
of power and responsibilities among the various levels of government.
    For the reasons discussed above, I certify this proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the DOT Regulatory Policies 
and Procedures (44 FR 11034, February 26, 1979); 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 proposed AD and placed it in the AD docket.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

[[Page 65478]]

The Proposed Amendment

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

PART 39--AIRWORTHINESS DIRECTIVES

    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:

Bombardier, Inc. (Formerly de Havilland, Inc.): Docket No. FAA-2007-
0213; Directorate Identifier 2007-NM-233-AD.

Comments Due Date

    (a) We must receive comments by December 21, 2007.

Affected ADs

    (b) None.

Applicability

    (c) This AD applies to 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, serial numbers 003 through 639; and Model DHC-8-400 
series airplanes, serial numbers 4003, 4004, 4006, and 4008 through 
4149; certificated in any category.

Subject

    (d) Air Transport Association (ATA) of America Code 33: Lights.

Reason

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

    Several cases have been reported where the pilot, co-pilot or 
observer utility light system has failed, resulting in a burning 
smell within the cockpit. An investigation has revealed that, due to 
the orientation and location of the carbon molded potentiometers 
used to control the intensity of the light, the potentiometers can 
fail and overheat in such a way that burning of the ceiling panel 
and the associated insulation blanket could occur. This could lead 
to the presence of smoke in the cockpit, requiring that the pilots 
carry out the appropriate emergency procedure.

Corrective actions include replacing the affected carbon molded 
resistive element potentiometers with wire-wound type 
potentiometers, for the pilot, co-pilot, and, if applicable, 
observer utility lights.

Actions and Compliance

    (f) Within 18 months after the effective date of this AD, unless 
already done, do the following actions.
    (1) For 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: Install 
Bombardier Modsum 8Q101603 to replace the affected carbon molded 
resistive element potentiometers with wire-wound type 
potentiometers, for both the pilot and co-pilot utility lights, in 
accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 8-33-53, Revision A, dated March 14, 2007.
    (2) For Model DHC-8-400 series airplanes: Install Bombardier 
Modsum 4-126381 to replace the affected carbon molded resistive 
element potentiometers with wire-wound type potentiometers, for the 
pilot, co-pilot, and observer utility lights, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 84-33-10, 
Revision A, dated March 14, 2007.
    (3) Actions done before the effective date of this AD in 
accordance with Bombardier Service Bulletin 8-33-53 or 84-33-10, 
both dated December 1, 2006, as applicable, are considered 
acceptable for compliance with the corresponding actions specified 
in this AD.

FAA AD Differences

    Note: This AD differs from the MCAI and/or service information 
as follows: No difference.

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 
Aircraft Certification Office, 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 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-2007-11, 
dated August 9, 2007; Bombardier Service Bulletin 8-33-53, Revision 
A, dated March 14, 2007; and Bombardier Service Bulletin 84-33-10, 
Revision A, dated March 14, 2007; for related information.

    Issued in Renton, Washington, on November 13, 2007.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
 [FR Doc. E7-22728 Filed 11-20-07; 8:45 am]
BILLING CODE 4910-13-P