Airworthiness Directives; Bombardier Model DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes, 16725-16728 [E6-4841]

Download as PDF Federal Register / Vol. 71, No. 64 / Tuesday, April 4, 2006 / Proposed Rules coupling on both sides of the dry bay wall, in accordance with the applicable service bulletin. Inspection of Electrical Bonding Jumper (i) For all airplanes as identified in the service bulletins: Within 60 months after the effective date of this AD, perform a general visual inspection and applicable corrective actions to ensure that an electrical bonding jumper is installed between the engine fuel feed tube and the adjacent wing station 285.65 rib in the left and right wing fuel tanks, in accordance with the service bulletins. Replacement of O-Ring and Test (j) For airplanes on which the actions in paragraphs (g) or (h)(2) of this AD were done before the effective date of this AD in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 757–28A0076, dated August 27, 2004; and Boeing Alert Service Bulletin 757–28A0077, dated August 27, 2004; as applicable: Within 60 months after the effective date of this AD, replace the O-ring, part number (P/N) MS29513–330 with a new O-ring, P/N MS29513–328, and do a leak test before further flight after reassembly. Do all actions in accordance with Part B of the Accomplishment Instructions of the applicable service bulletin. Exception to Accomplishment Instructions in Service Bulletins (k) Although Boeing Service Bulletin 757– 28A0076, Revision 1, and Boeing Service Bulletin 757–28A0077, Revision 1, both dated October 20, 2005, permit operator’s equivalent procedures (OEP), this AD would require you to use the referenced Airplane Maintenance Manuals, except that operators may use their own FAA-approved OEPs to drain the left and right engine fuel tubes, to drain and ventilate the fuel tanks, and to enter the fuel tanks. Actions Accomplished in Accordance With Original Issues of Service Bulletins (l) Actions done before the effective date of this AD in accordance with Boeing Service Bulletin 757–28A0076, and Boeing Service Bulletin 757–28A0077, both dated August 24, 2004, are acceptable for compliance only with the requirements of paragraph (h)(1) of this AD. cchase on PROD1PC60 with PROPOSALS Alternative Methods of Compliance (AMOCs) (m)(1) The Manager, Seattle 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) Before using any AMOC approved in accordance with § 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. VerDate Aug<31>2005 17:58 Apr 03, 2006 Jkt 208001 Issued in Renton, Washington, on March 24, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E6–4827 Filed 4–3–06; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2006–24290; Directorate Identifier 2005–NM–243–AD] RIN 2120–AA64 Airworthiness Directives; Bombardier Model DHC–8–100, DHC–8–200, and DHC–8–300 Series Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Notice of proposed rulemaking (NPRM). AGENCY: SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model DHC–8–100, DHC–8–200, and DHC–8–300 series airplanes. This proposed AD would require repetitive inspections of the fluorescent light tube assemblies of the cabin, lavatory, and sidewall, and corrective actions if necessary. This proposed AD would also provide for optional terminating action for the repetitive inspections. This proposed AD results from reports of overheating due to arcing between the fluorescent tube pins and the lamp holder contacts. The tubes had not been properly seated during installation. We are proposing this AD to prevent fumes, traces of visible smoke, and fire at the fluorescent light tube assembly. DATES: We must receive comments on this proposed AD by May 4, 2006. ADDRESSES: Use one of the following addresses to submit comments on this proposed AD. • DOT Docket Web site: Go to https://dms.dot.gov and follow the instructions for sending your comments electronically. • Government-wide rulemaking Web site: Go to https://www.regulations.gov and follow the instructions for sending your comments electronically. • Mail: Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Nassif Building, room PL–401, Washington, DC 20590. • Fax: (202) 493–2251. • Hand Delivery: Room PL–401 on the plaza level of the Nassif Building, PO 00000 Frm 00015 Fmt 4702 Sfmt 4702 16725 400 Seventh Street SW., Washington, DC, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. Contact Bombardier, Inc., Bombardier Regional Aircraft Division, 123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for service information identified in this proposed AD. FOR FURTHER INFORMATION CONTACT: Douglas Wagner, 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) 228–7306; fax (516) 794–5531. SUPPLEMENTARY INFORMATION: Comments Invited We invite you to submit any relevant written data, views, or arguments regarding this proposed AD. Send your comments to an address listed in the ADDRESSES section. Include the docket number ‘‘FAA–2006–24290; Directorate Identifier 2005–NM–243–AD’’ at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments received by the closing date and may amend the proposed AD in light of those comments. We will post all comments we receive, without change, to https:// dms.dot.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed AD. Using the search function of that Web site, anyone can find and read the comments in any of our dockets, including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You may review the DOT’s complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477–78), or you may visit https:// dms.dot.gov. Examining the Docket You may examine the AD docket on the Internet at https://dms.dot.gov, or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone (800) 647–5227) is located on the plaza level of the Nassif Building at the DOT street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after the Docket Management System receives them. E:\FR\FM\04APP1.SGM 04APP1 16726 Federal Register / Vol. 71, No. 64 / Tuesday, April 4, 2006 / Proposed Rules Discussion Transport Canada Civil Aviation (TCCA), which is the airworthiness authority for Canada, advised us that an unsafe condition may exist on certain Bombardier Model DHC–8–100, DHC– 8–200, and DHC–8–300 series airplanes. TCCA advises that numerous service difficulty reports have indicated damage to fluorescent lamp holders in the cabin, DE Cabin ............................................. Lavatory ......................................... Sidewall ......................................... 100 200 300 100 200 300 100 200 300 cchase on PROD1PC60 with PROPOSALS Bombardier has issued Service Bulletins 8–33–52, dated April, 15, 2005, and 8–33–51, Revision ‘A,’ dated April 20, 2005. The service bulletins describe procedures for replacing certain ballasts with new ‘‘Arc Protection’’ ballasts. Accomplishing the actions specified in the service information is intended to adequately address the unsafe condition. TCCA mandated the inspections specified in the TRs, and prohibited future replacement of an existing ballast except in accordance with the service bulletins. TCCA issued Canadian airworthiness directive CF– 2004–26R1, dated September 28, 2005, to ensure the continued airworthiness of these airplanes in Canada. FAA’s Determination and Requirements of the Proposed AD These airplane models are manufactured in Canada and are type certificated for operation in the United States under the provisions of section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. Pursuant to this bilateral airworthiness agreement, TCCA has kept the FAA informed of the situation described above. We have examined TCCA’s findings, evaluated all pertinent information, and determined that we need to issue an AD for airplanes of this type design that are certificated for operation in the United States. Therefore, we are proposing this AD, which would require repetitive inspections to detect signs of arcing in the fluorescent light tube assemblies of VerDate Aug<31>2005 17:58 Apr 03, 2006 Jkt 208001 Relevant Service Information The manufacturer has revised certain procedures for inspecting certain fluorescent tube assemblies. These procedures for detailed visual inspections are described in the temporary revisions (TRs) to the de Havilland DASH–8 Maintenance Program Manual, as identified in the following table. HAVILLAND MAINTENANCE PROGRAM MANUAL TRS DHC–8 series Area lavatory, and sidewall due to overheating. The overheating can result from arcing between the fluorescent tube pins and the lamp holder contacts if the tube is not properly seated during installation. This condition, if not corrected, could result in fumes, traces of visible smoke, and fire at the fluorescent light tube assembly. Task No. 3320/01 3320/01 3320/01 3320/03 3320/03 3320/03 3320/02 3320/02 3320/02 TR Date MRB–146 ...................................... MRB 2–24 ..................................... MRB 3–155 ................................... MRB–147 ...................................... MRB 2–25 ..................................... MRB 3–156 ................................... MRB–147 ...................................... MRB 2–25 ..................................... MRB 3–156 ................................... August 31, 2004 ........................... August 31, 2004 ........................... August 31, 2004 ........................... May 3, 2005 .................................. May 3, 2005 .................................. May 3, 2005 .................................. May 3, 2005 .................................. May 3, 2005 .................................. May 3, 2005 .................................. the cabin, lavatory, and sidewall, and corrective actions if necessary. This proposed AD would also provide for optional terminating action for the repetitive inspections. Differences Between Service Information/Canadian Airworthiness Directive The following differences apply to this proposed AD: 1. The Canadian airworthiness directive does not specify intervals for repeating the inspections. Instead, it requires incorporating the TRs previously identified into the applicable Maintenance Review Board (MRB) document, which contains the repetitive intervals for the inspections. TCCA requires operators in Canada to use the information—including the repetitive intervals—in the latest revision of the MRB. However, since the MRB is not mandatory in the U.S., this proposed AD would require that operators repeat the inspections. 2. The Canadian airworthiness directive requires the initial inspection at the earlier of the next C-check or within 36 months. But maintenance schedules vary among operators, so a compliance time specified as the next Ccheck would not ensure that the airplane would be inspected in a timely manner. We have been advised that the average C-check interval is 5,000 flight hours; therefore, this proposed AD would require the initial inspection within the earlier of 36 months or 5,000 flight hours. 3. This proposed AD would allow the repetitive inspections to be terminated if PO 00000 Frm 00016 Fmt 4702 Sfmt 4702 PSM No. 1–8–7 1–82–7 1–83–7 1–8–7 1–82–7 1–83–7 1–8–7 1–82–7 1–83–7 all ballasts installed on the airplane are ‘‘Arc Protection’’ ballasts. Although this provision is not specifically stated in the Canadian airworthiness directive, TCCA’s intent was to consider total ballast replacement as terminating action for the repetitive inspections. 4. The service bulletins do not provide for corrective action for signs of arcing. This proposed AD would require repairing those conditions before further flight using a method approved by the FAA or TCCA (or its delegated agent). In light of the type of repair that would be required to address the unsafe condition, and consistent with existing bilateral airworthiness agreements, we have determined that a repair approved by the FAA or TCCA would be acceptable for compliance with this proposed AD. Chapter 33–20–00, Section D, of the Airplane Maintenance Manual is one approved method. 5. The TRs specify ‘‘detailed visual inspections’’ of the fluorescent light tube assemblies of the cabin, lavatory, and sidewall. We have determined that the procedures in the TRs should be described as a ‘‘detailed inspections.’’ Note 1 in this proposed AD defines this type of inspection. These differences have been coordinated with TCCA. Costs of Compliance The following table provides the estimated costs for U.S. operators to comply with this proposed AD. This proposed AD would affect about 121 U.S.-registered airplanes. E:\FR\FM\04APP1.SGM 04APP1 Federal Register / Vol. 71, No. 64 / Tuesday, April 4, 2006 / Proposed Rules 16727 ESTIMATED COSTS, PER INSPECTION CYCLE Average labor rate per hour Action Work hours Inspection, per inspection cycle. Ballast replacement (optional) 6 maximum ............................. $80 None ....................................... Up to $480. 2, per ballast 1 ......................... 80 $486, per ballast ..................... Up to $41,990. 1 NUMBER OF Parts Cost per airplane BALLASTS PER AIRPLANE Area Airplane model Lavatory ......................................................................................... DHC–8–100 DHC–8–300 DHC–8–100 DHC–8–300 DHC–8–100 DHC–8–300 and –200 ................................................................. ................................................................................. and –200 ................................................................. ................................................................................. and –200 ................................................................. ................................................................................. 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. 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. See the ADDRESSES section for a location to examine the regulatory evaluation. Applicability Regulatory Findings We have 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 that the 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 1. The authority citation for part 39 continues to read as follows: Sidewall ......................................................................................... Cabin ............................................................................................. cchase on PROD1PC60 with PROPOSALS Number of ballasts VerDate Aug<31>2005 17:58 Apr 03, 2006 Jkt 208001 List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Safety. 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 [Amended] 2. The Federal Aviation Administration (FAA) amends § 39.13 by adding the following new airworthiness directive (AD): Bombardier, Inc. (Formerly de Havilland, Inc.): Docket No. FAA–2006–24290; Directorate Identifier 2005–NM–243–AD. Comments Due Date (a) The FAA must receive comments on this AD action by May 4, 2006. Affected ADs (b) None. PO 00000 Frm 00017 Fmt 4702 Sfmt 4702 (c) This AD applies to Bombardier Model DHC–8–102, –103, –106, –201, –202, –301, –311, and –315 airplanes; certificated in any category; serial numbers 003 through 407 inclusive, 409 through 412 inclusive, and 414 through 433 inclusive; excluding those with Hunting interiors. Unsafe Condition (d) This AD results from reports of overheating due to arcing between the fluorescent tube pins and the lamp holder contacts. The tubes had not been properly seated during installation. We are issuing this AD to prevent fumes, traces of visible smoke, and fire at the fluorescent light tube assembly. 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. Inspection Authority: 49 U.S.C. 106(g), 40113, 44701. § 39.13 1 1 19 30 21 33 (f) Within 5,000 flight hours or 36 months after the effective date of this AD, whichever occurs first: Perform detailed inspections to detect signs of arcing of the fluorescent tube assemblies of the cabin, sidewalls, and lavatory, in accordance with the applicable temporary revision (TR) of the maintenance program manual (MPM) identified in Table 1 of this AD. If any sign of arcing is found, repair before further flight using a method approved by either the Manager, International Branch, ANM–116, Transport Airplane Directorate, FAA; or Transport Canada Civil Aviation (or its delegated agent). Chapter 33–20–00, Section D, of the Airplane Maintenance Manual is one approved method. Repeat the inspection at intervals not to exceed 5,000 flight hours, until all Ballast part numbers BA08006–1 or BA08006–28–1 have been replaced in accordance with paragraph (g) of this AD. E:\FR\FM\04APP1.SGM 04APP1 16728 Federal Register / Vol. 71, No. 64 / Tuesday, April 4, 2006 / Proposed Rules TABLE 1.—TRS Inspect the fluorescent tube assemblies of the— In accordance with Task No.— Cabin ...................................... 3320/01 3320/01 3320/01 Lavatory .................................. 3320/03 3320/03 3320/03 Sidewall .................................. 3320/02 3320/02 3320/02 Note 1: For the purposes of this AD, a detailed inspection is: ‘‘An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.’’ of de Havilland TR— To the de Havilland DASH 8 series— For model— MRB 2–24, dated August 31, 2004. MRB 3–155, dated August 31, 2004. MRB–146, dated August 31, 2004. MRB –147, dated May 3, 2005. MRB 2–25, dated May 3, 2005. MRB 3–156, dated May 3, 2005. MRB 2–25, dated May 3, 2005. MRB 3–156, dated May 3, 2003. MRB –147, dated May 3, 2003. 200 MPM PSM 1–82–7 ......... DHC–8–201 and –202 airplanes. DHC–8–301, –311, –314, and –315 airplanes. DHC–8–102, –103, –106 airplanes. DHC–8–102, –103, –106 airplanes. DHC–8–201 and –202 airplanes. DHC–8–301, –311, –314, and –315 airplanes. DHC–8–201 and –202 airplanes. DHC–8–301, –311, –314, and –315 airplanes. DHC–8–102, –103, –106 airplanes. 300 MPM PSM 1–83–7 ......... 100 MPM PSM 1–8–7 ........... 100 MPM PSM 1–8–7 ........... 200 MPM PSM 1–82–7 ......... 300 MPM PSM 1–83–7 ......... 200 MPM PSM 1–82–7 ......... 300 MPM PSM 1–83–7 ......... 100 MPM PSM 1–8–7 ........... Related Information (j) Canadian airworthiness directive CF– 2004–26R1, dated September 28, 2005, also addresses the subject of this AD. Issued in Renton, Washington, on March 24, 2006. Ali Bahrami, Manager, Transport Airplane Directorate, Aircraft Certification Service. [FR Doc. E6–4841 Filed 4–3–06; 8:45 am] BILLING CODE 4910–13–P Terminating Action (g) The repetitive inspections required by this AD may be terminated if all ballasts installed on the airplane have part number (P/N) BR9000–21, installed in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 8–33–51, Revision ‘A,’ dated April 20, 2005 (to replace ballast P/N BA08006–1), or 8–33–52, dated April 15, 2005 (to replace ballast P/N BA08006–28–1). Ballasts installed before the effective date of this AD are also acceptable if done in accordance with Bombardier Service Bulletin 8–33–51, dated August 16, 2002. Parts Installation (h) As of the effective date of this AD: No person may install a ballast P/N BA08006–1 or BA08006–28–1 on any airplane. cchase on PROD1PC60 with PROPOSALS Alternative Methods of Compliance (AMOCs) (i)(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) Before using any AMOC approved in accordance with § 39.19 on any airplane to which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office. VerDate Aug<31>2005 17:58 Apr 03, 2006 Jkt 208001 ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 18 [FRL–8053–4] RIN 2030–AA91 Environmental Protection Research Fellowships and Special Research Consultants for Environmental Protection Environmental Protection Agency (EPA). ACTION: Proposed rule. AGENCY: SUMMARY: The EPA is taking direct final action on the implementation of the EPA’s statutory authority in Title II of the Interior, Environment, and Related Agencies Appropriations Act of 2006 (Pub. L. 109–54) that will allow the EPA to establish fellowships in environmental protection research, appoint fellows to conduct this research, and appoint special research consultants to advise on environmental protection research. Under an administrative provision of Public Law 109–54, the Administrator may, after consultation with the Office of PO 00000 Frm 00018 Fmt 4702 Sfmt 4702 Personnel Management, make up to five (5) appointments in any fiscal year from 2006 to 2011 for the Office of Research and Development. Appointees under this authority shall be employees of the EPA and will engage in activities related to scientific and engineering research that support EPA’s mission to protect the environment and human health. In the ‘‘Rules and Regulations’’ section of the Federal Register, we are approving implementation of the EPA’s statutory authority (to establish fellowships in environmental protection research and appoint fellows to conduct this research and appoint special research consultants to advise on environmental protection research) in Title II of the Interior, Environmental and Related Agencies Appropriations Act of 2006 (Pub. L. 109–54) with 42 U.S.C. 209 as a direct final rule without prior proposal because we view this as a non-controversial revision and anticipate no adverse comment. We have explained our reasons for this approval in the preamble to the direct final rule. If we receive no adverse comment, no further action on this proposed rule will be taken. If we receive adverse comment, we will withdraw the direct final rule and it will not take effect. We will address all public comments in a subsequent final rule based on this proposed rule. We will not institute a second comment period on this action. Any parties interested in commenting must do so at this time. Comments on this proposed rule must be received by May 4, 2006. DATES: Submit your comments, identified by Docket ID No. EPA–HQ– ADDRESSES: E:\FR\FM\04APP1.SGM 04APP1

Agencies

[Federal Register Volume 71, Number 64 (Tuesday, April 4, 2006)]
[Proposed Rules]
[Pages 16725-16728]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E6-4841]

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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2006-24290; Directorate Identifier 2005-NM-243-AD]
RIN 2120-AA64

Airworthiness Directives; Bombardier Model DHC-8-100, DHC-8-200,
and DHC-8-300 Series Airplanes

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

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: The FAA proposes to adopt a new airworthiness directive (AD)
for certain Bombardier Model DHC-8-100, DHC-8-200, and DHC-8-300 series
airplanes. This proposed AD would require repetitive inspections of the
fluorescent light tube assemblies of the cabin, lavatory, and sidewall,
and corrective actions if necessary. This proposed AD would also
provide for optional terminating action for the repetitive inspections.
This proposed AD results from reports of overheating due to arcing
between the fluorescent tube pins and the lamp holder contacts. The
tubes had not been properly seated during installation. We are
proposing this AD to prevent fumes, traces of visible smoke, and fire
at the fluorescent light tube assembly.

DATES: We must receive comments on this proposed AD by May 4, 2006.

ADDRESSES: Use one of the following addresses to submit comments on
this proposed AD.
DOT Docket Web site: Go to https://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to https://
www.regulations.gov and follow the instructions for sending your
comments electronically.
Mail: Docket Management Facility, U.S. Department of
Transportation, 400 Seventh Street SW., Nassif Building, room PL-401,
Washington, DC 20590.
Fax: (202) 493-2251.
Hand Delivery: Room PL-401 on the plaza level of the
Nassif Building, 400 Seventh Street SW., Washington, DC, between 9 a.m.
and 5 p.m., Monday through Friday, except Federal holidays.
Contact Bombardier, Inc., Bombardier Regional Aircraft Division,
123 Garratt Boulevard, Downsview, Ontario M3K 1Y5, Canada, for service
information identified in this proposed AD.

FOR FURTHER INFORMATION CONTACT: Douglas Wagner, 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) 228-7306; fax (516) 794-5531.

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to submit any relevant written data, views, or
arguments regarding this proposed AD. Send your comments to an address
listed in the ADDRESSES section. Include the docket number ``FAA-2006-
24290; Directorate Identifier 2005-NM-243-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of the proposed AD. We will
consider all comments received by the closing date and may amend the
proposed AD in light of those comments.
We will post all comments we receive, without change, to https://
dms.dot.gov, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this proposed AD. Using the search function of
that Web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You may review the DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
may visit https://dms.dot.gov.

Examining the Docket

You may examine the AD docket on the Internet at https://
dms.dot.gov, or in person at the Docket Management Facility office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The Docket Management Facility office (telephone (800) 647-
5227) is located on the plaza level of the Nassif Building at the DOT
street address stated in the ADDRESSES section. Comments will be
available in the AD docket shortly after the Docket Management System
receives them.

[[Page 16726]]

Discussion

Transport Canada Civil Aviation (TCCA), which is the airworthiness
authority for Canada, advised us that an unsafe condition may exist on
certain Bombardier Model DHC-8-100, DHC-8-200, and DHC-8-300 series
airplanes. TCCA advises that numerous service difficulty reports have
indicated damage to fluorescent lamp holders in the cabin, lavatory,
and sidewall due to overheating. The overheating can result from arcing
between the fluorescent tube pins and the lamp holder contacts if the
tube is not properly seated during installation. This condition, if not
corrected, could result in fumes, traces of visible smoke, and fire at
the fluorescent light tube assembly.

Relevant Service Information

The manufacturer has revised certain procedures for inspecting
certain fluorescent tube assemblies. These procedures for detailed
visual inspections are described in the temporary revisions (TRs) to
the de Havilland DASH-8 Maintenance Program Manual, as identified in
the following table.

de Havilland Maintenance Program Manual TRs
----------------------------------------------------------------------------------------------------------------
DHC-8
Area series Task No. TR Date PSM No.
----------------------------------------------------------------------------------------------------------------
Cabin............................. 100 3320/01 MRB-146.............. August 31, 2004..... 1-8-7
200 3320/01 MRB 2-24............. August 31, 2004..... 1-82-7
300 3320/01 MRB 3-155............ August 31, 2004..... 1-83-7
Lavatory.......................... 100 3320/03 MRB-147.............. May 3, 2005......... 1-8-7
200 3320/03 MRB 2-25............. May 3, 2005......... 1-82-7
300 3320/03 MRB 3-156............ May 3, 2005......... 1-83-7
Sidewall.......................... 100 3320/02 MRB-147.............. May 3, 2005......... 1-8-7
200 3320/02 MRB 2-25............. May 3, 2005......... 1-82-7
300 3320/02 MRB 3-156............ May 3, 2005......... 1-83-7
----------------------------------------------------------------------------------------------------------------

Bombardier has issued Service Bulletins 8-33-52, dated April, 15,
2005, and 8-33-51, Revision `A,' dated April 20, 2005. The service
bulletins describe procedures for replacing certain ballasts with new
``Arc Protection'' ballasts.
Accomplishing the actions specified in the service information is
intended to adequately address the unsafe condition. TCCA mandated the
inspections specified in the TRs, and prohibited future replacement of
an existing ballast except in accordance with the service bulletins.
TCCA issued Canadian airworthiness directive CF-2004-26R1, dated
September 28, 2005, to ensure the continued airworthiness of these
airplanes in Canada.

FAA's Determination and Requirements of the Proposed AD

These airplane models are manufactured in Canada and are type
certificated for operation in the United States under the provisions of
section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and
the applicable bilateral airworthiness agreement. Pursuant to this
bilateral airworthiness agreement, TCCA has kept the FAA informed of
the situation described above. We have examined TCCA's findings,
evaluated all pertinent information, and determined that we need to
issue an AD for airplanes of this type design that are certificated for
operation in the United States.
Therefore, we are proposing this AD, which would require repetitive
inspections to detect signs of arcing in the fluorescent light tube
assemblies of the cabin, lavatory, and sidewall, and corrective actions
if necessary. This proposed AD would also provide for optional
terminating action for the repetitive inspections.

Differences Between Service Information/Canadian Airworthiness
Directive

The following differences apply to this proposed AD:
1. The Canadian airworthiness directive does not specify intervals
for repeating the inspections. Instead, it requires incorporating the
TRs previously identified into the applicable Maintenance Review Board
(MRB) document, which contains the repetitive intervals for the
inspections. TCCA requires operators in Canada to use the information--
including the repetitive intervals--in the latest revision of the MRB.
However, since the MRB is not mandatory in the U.S., this proposed AD
would require that operators repeat the inspections.
2. The Canadian airworthiness directive requires the initial
inspection at the earlier of the next C-check or within 36 months. But
maintenance schedules vary among operators, so a compliance time
specified as the next C-check would not ensure that the airplane would
be inspected in a timely manner. We have been advised that the average
C-check interval is 5,000 flight hours; therefore, this proposed AD
would require the initial inspection within the earlier of 36 months or
5,000 flight hours.
3. This proposed AD would allow the repetitive inspections to be
terminated if all ballasts installed on the airplane are ``Arc
Protection'' ballasts. Although this provision is not specifically
stated in the Canadian airworthiness directive, TCCA's intent was to
consider total ballast replacement as terminating action for the
repetitive inspections.
4. The service bulletins do not provide for corrective action for
signs of arcing. This proposed AD would require repairing those
conditions before further flight using a method approved by the FAA or
TCCA (or its delegated agent). In light of the type of repair that
would be required to address the unsafe condition, and consistent with
existing bilateral airworthiness agreements, we have determined that a
repair approved by the FAA or TCCA would be acceptable for compliance
with this proposed AD. Chapter 33-20-00, Section D, of the Airplane
Maintenance Manual is one approved method.
5. The TRs specify ``detailed visual inspections'' of the
fluorescent light tube assemblies of the cabin, lavatory, and sidewall.
We have determined that the procedures in the TRs should be described
as a ``detailed inspections.'' Note 1 in this proposed AD defines this
type of inspection.
These differences have been coordinated with TCCA.

Costs of Compliance

The following table provides the estimated costs for U.S. operators
to comply with this proposed AD. This proposed AD would affect about
121 U.S.-registered airplanes.

[[Page 16727]]

Estimated Costs, per Inspection Cycle
----------------------------------------------------------------------------------------------------------------
Average
Action Work hours labor rate Parts Cost per airplane
per hour
----------------------------------------------------------------------------------------------------------------
Inspection, per inspection cycle. 6 maximum........... $80 None................ Up to $480.
Ballast replacement (optional)... 2, per ballast \1\.. 80 $486, per ballast... Up to $41,990.
----------------------------------------------------------------------------------------------------------------

\1\ Number of Ballasts per Airplane
------------------------------------------------------------------------
Number of
Area Airplane model ballasts
------------------------------------------------------------------------
Lavatory......................... DHC-8-100 and -200...... 1
DHC-8-300............... 1
Sidewall......................... DHC-8-100 and -200...... 19
DHC-8-300............... 30
Cabin............................ DHC-8-100 and -200...... 21
DHC-8-300............... 33
------------------------------------------------------------------------

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 have 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 that the 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. See the
ADDRESSES section for a location to examine the regulatory evaluation.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Safety.

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 Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):

Bombardier, Inc. (Formerly de Havilland, Inc.): Docket No. FAA-2006-
24290; Directorate Identifier 2005-NM-243-AD.

Comments Due Date

(a) The FAA must receive comments on this AD action by May 4,
2006.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Bombardier Model DHC-8-102, -103, -106, -
201, -202, -301, -311, and -315 airplanes; certificated in any
category; serial numbers 003 through 407 inclusive, 409 through 412
inclusive, and 414 through 433 inclusive; excluding those with
Hunting interiors.

Unsafe Condition

(d) This AD results from reports of overheating due to arcing
between the fluorescent tube pins and the lamp holder contacts. The
tubes had not been properly seated during installation. We are
issuing this AD to prevent fumes, traces of visible smoke, and fire
at the fluorescent light tube assembly.

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.

Inspection

(f) Within 5,000 flight hours or 36 months after the effective
date of this AD, whichever occurs first: Perform detailed
inspections to detect signs of arcing of the fluorescent tube
assemblies of the cabin, sidewalls, and lavatory, in accordance with
the applicable temporary revision (TR) of the maintenance program
manual (MPM) identified in Table 1 of this AD. If any sign of arcing
is found, repair before further flight using a method approved by
either the Manager, International Branch, ANM-116, Transport
Airplane Directorate, FAA; or Transport Canada Civil Aviation (or
its delegated agent). Chapter 33-20-00, Section D, of the Airplane
Maintenance Manual is one approved method. Repeat the inspection at
intervals not to exceed 5,000 flight hours, until all Ballast part
numbers BA08006-1 or BA08006-28-1 have been replaced in accordance
with paragraph (g) of this AD.

[[Page 16728]]

Table 1.--TRs
----------------------------------------------------------------------------------------------------------------
In accordance
Inspect the fluorescent tube with Task No.-- of de Havilland TR-- To the de Havilland For model--
assemblies of the-- DASH 8 series--
----------------------------------------------------------------------------------------------------------------
Cabin............................ 3320/01 MRB 2-24, dated 200 MPM PSM 1-82-7. DHC-8-201 and -202
August 31, 2004. airplanes.
3320/01 MRB 3-155, dated 300 MPM PSM 1-83-7. DHC-8-301, -311, -
August 31, 2004. 314, and -315
airplanes.
3320/01 MRB-146, dated 100 MPM PSM 1-8-7.. DHC-8-102, -103, -
August 31, 2004. 106 airplanes.
Lavatory......................... 3320/03 MRB -147, dated May 100 MPM PSM 1-8-7.. DHC-8-102, -103, -
3, 2005. 106 airplanes.
3320/03 MRB 2-25, dated May 200 MPM PSM 1-82-7. DHC-8-201 and -202
3, 2005. airplanes.
3320/03 MRB 3-156, dated 300 MPM PSM 1-83-7. DHC-8-301, -311, -
May 3, 2005. 314, and -315
airplanes.
Sidewall......................... 3320/02 MRB 2-25, dated May 200 MPM PSM 1-82-7. DHC-8-201 and -202
3, 2005. airplanes.
3320/02 MRB 3-156, dated 300 MPM PSM 1-83-7. DHC-8-301, -311, -
May 3, 2003. 314, and -315
airplanes.
3320/02 MRB -147, dated May 100 MPM PSM 1-8-7.. DHC-8-102, -103, -
3, 2003. 106 airplanes.
----------------------------------------------------------------------------------------------------------------

Note 1: For the purposes of this AD, a detailed inspection is:
``An intensive examination of a specific item, installation, or
assembly to detect damage, failure, or irregularity. Available
lighting is normally supplemented with a direct source of good
lighting at an intensity deemed appropriate. Inspection aids such as
mirror, magnifying lenses, etc., may be necessary. Surface cleaning
and elaborate procedures may be required.''

Terminating Action

(g) The repetitive inspections required by this AD may be
terminated if all ballasts installed on the airplane have part
number (P/N) BR9000-21, installed in accordance with the
Accomplishment Instructions of Bombardier Service Bulletin 8-33-51,
Revision `A,' dated April 20, 2005 (to replace ballast P/N BA08006-
1), or 8-33-52, dated April 15, 2005 (to replace ballast P/N
BA08006-28-1). Ballasts installed before the effective date of this
AD are also acceptable if done in accordance with Bombardier Service
Bulletin 8-33-51, dated August 16, 2002.

Parts Installation

(h) As of the effective date of this AD: No person may install a
ballast P/N BA08006-1 or BA08006-28-1 on any airplane.

Alternative Methods of Compliance (AMOCs)

(i)(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) Before using any AMOC approved in accordance with Sec.
39.19 on any airplane to which the AMOC applies, notify the
appropriate principal inspector in the FAA Flight Standards
Certificate Holding District Office.

Related Information

(j) Canadian airworthiness directive CF-2004-26R1, dated
September 28, 2005, also addresses the subject of this AD.

Issued in Renton, Washington, on March 24, 2006.
Ali Bahrami,
Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E6-4841 Filed 4-3-06; 8:45 am]
BILLING CODE 4910-13-P

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