Federal Aviation Administration (FAA), Department of Transportation (DOT).
Notice of proposed rulemaking (NPRM).Start Printed Page 39245
The FAA proposes to adopt a new airworthiness directive (AD) for certain Bombardier Model DHC-8-400 series airplanes. This proposed AD would require inspecting for fouling and chafing damage of the outboard brake control cable of the main landing gear, replacing the control cable if necessary, reworking the control cable cover, and, if applicable, manufacturing/installing an offset plate on the control cable cover. This proposed AD is prompted by a review of brake control cable operation conducted by the manufacturer. We are proposing this AD to prevent abrasion and wear of the outboard brake control cable, which could lead to cable separation and reduced control of airplane braking.
We must receive comments on this proposed AD by August 11, 2006.
Use one of the following addresses to submit comments on this proposed AD.
- DOT Docket Web site: Go to http://dms.dot.gov and follow the instructions for sending your comments electronically.
- Government-wide rulemaking Web site: Go to http://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.Start Further Info
FOR FURTHER INFORMATION CONTACT:
Ezra Sasson, 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) 228-7320; fax (516) 794-5531.End Further Info End Preamble Start Supplemental Information
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-2006-25328; Directorate Identifier 2006-NM-130-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 http://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 http://dms.dot.gov.
Examining the Docket
You may examine the AD docket on the Internet at http://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.
Transport Canada Civil Aviation (TCCA), which is the airworthiness authority for Canada, notified us that an unsafe condition may exist on certain Bombardier Model DHC-8-400 series airplanes. TCCA advises that a review conducted by the manufacturer revealed that the outboard brake control cable can become fouled on two fasteners on the pilot's bulkhead cover assembly. This condition, if not corrected, could result in abrasion and wear of the outboard brake control cable, which could lead to cable separation and reduced control of airplane braking.
Relevant Service Information
Bombardier has issued Service Bulletin 84-53-37, Revision ‘C,' dated December 5, 2005. The service bulletin describes procedures for inspecting for fouling and chafing damage of the main landing gear outboard brake control cable, replacing the control cable if necessary, reworking the control cable cover, and, if not already installed, manufacturing/installing an offset plate on the control cable cover. Accomplishing the actions specified in the service information is intended to adequately address the unsafe condition. TCCA mandated the service information and issued Canadian airworthiness directive CF-2006-05, dated March 31, 2006, 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 accomplishing the actions specified in the service information described previously, except as discussed under “Clarification of Inspection Terminology.”
Clarification of Inspection Terminology
The service bulletin specifies a “visual inspection;” however, this proposed AD would require a “general visual inspection.” We have included the definition of a general visual inspection in a note in the proposed AD.
Costs of Compliance
The following table provides the estimated costs for U.S. operators to comply with this proposed AD, at an average labor rate of $80 per work hour. Start Printed Page 39246
|Action||Work hours||Parts||Cost per airplane||Number of U.S.- registered airplanes||Fleet cost|
|Inspect brake cable||1||N/A||$80||17||$1,360.|
|Rework cable cover||3||N/A||240||17||4,080.|
|Manufacture/ install offset plate, as applicable||3||200||440||Up to 17||Up to $7,480.|
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.
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.Start List of Subjects
List of Subjects in 14 CFR Part 39End List of Subjects
The Proposed Amendment
Accordingly, under the authority delegated to me by the Administrator, the FAA proposes to amend 14 CFR part 39 as follows:Start Part
PART 39—AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
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-2006-25328; Directorate Identifier 2006-NM-130-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by August 11, 2006.
(c) This AD applies to Bombardier Model DHC-8-400 series airplanes, certificated in any category; having serial numbers 4003, 4004, 4006, 4008 through 4064 inclusive, 4072, and 4073.
(d) This AD results from a review of brake control cable operation conducted by the manufacturer. We are issuing this AD to prevent abrasion and wear of the outboard brake control cable, which could lead to cable separation and reduced control of airplane braking.
(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 of Control Cable
(f) Within 12 months after the effective date of this AD, perform a general visual inspection for fouling and chafing damage of the outboard brake control cable of the main landing gear, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-53-37, Revision “C,” dated December 5, 2005.
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.”
Control Cable Cover Rework Only
(g) If no fouling or damage is found during the inspection required by paragraph (f) of this AD: Within 24 months after the accomplishment date of the inspection, rework the control cable cover and, as applicable, manufacture/install the offset plate assembly; in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-53-37, Revision “C,” dated December 5, 2005.
Cable Replacement and Control Cable Cover Rework
(h) If any fouling or damage is found during the inspection required by paragraph (f) of this AD: Before further flight, replace the control cable with a new control cable, rework the control cable cover and, if not already installed, manufacture/install the offset plate assembly; in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 84-53-37, Revision “C,” dated December 5, 2005.
Actions Accomplished According to Previous Issue of Service Bulletin
(i) Actions accomplished before the effective date of this AD in accordance with Bombardier Service Bulletin 84-53-37, Revision “A,” dated October 17, 2005; or Revision “B,” dated November 24, 2005; are considered acceptable for compliance with the corresponding actions specified in this AD.
Alternative Methods of Compliance (AMOCs)
(j)(1) The Manager, New York Aircraft Certification Office (ACO), 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 Start Printed Page 39247which the AMOC applies, notify the appropriate principal inspector in the FAA Flight Standards Certificate Holding District Office.
(k) Canadian airworthiness directive CF-2006-05, dated March 31, 2006, also addresses the subject of this AD.
Issued in Renton, Washington, on July 3, 2006.
Kalene C. Yanamura,
Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.
[FR Doc. E6-10912 Filed 7-11-06; 8:45 am]
BILLING CODE 4910-13-P