AD 2005-12-14

Effective June 30, 2005.

The incorporation by reference of certain publications listed in the AD is approved by the Director of the Federal Register as of June 30, 2005.

We must receive comments on this AD by August 15, 2005.

Use one of the following addresses to submit comments on this 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.

For service information identified in this AD, contact Boeing Commercial Airplanes, PO Box 3707, Seattle, Washington 98124-2207; or Goodrich Aircraft Interior Products, 3414 South 5th Street, Phoenix, Arizona 85040, as applicable.

You can examine the contents of this AD docket on the Internet at http://dms.dot.gov, or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, on the plaza level of the Nassif Building, Washington, DC. This docket number is FAA-2005-21240; the directorate identifier for this docket is 2005-NM-104-AD.

Susan Rosanske, Aerospace Engineer, Cabin Safety and Environmental Systems Branch, ANM-150S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 917-6448; fax (425) 917-6590.

We have received a report indicating that three cases of uncommanded inflation of door-mounted escape slide/rafts occurred on Boeing Model 767-300 series airplanes. In one case, the uncommanded inflation of the door-mounted escape slide/raft resulted in injury to a member of the cabin crew. In the other two incidents, damage occurred to the lavatory, ceiling panels, door bustles, and the sidewalls. Inspections by the airplane manufacturer and the escape slide/raft supplier of the factory packs and overhauled packs revealed variability in the slack/tension condition of the firing cable of the slide/rafts. The slide/rafts are designed with slack in the firing cable. Investigation revealed that a “tight” (excessive tension) firing cable, in combination with changes that occur in the pack as the result of the in-service environment, could result in the tension on the firing cable increasing and activating the regulator valve. This condition, if not corrected, could result in injury to maintenance personnel, passengers, and crew during otherwise normal operating conditions and could result in interference with evacuation of the airplane during an emergency, due to uncommanded inflation inside the airplane of a door-mounted escape slide/raft.

We have reviewed Boeing Alert Service Bulletin (ASB) 767-25A0390, dated May 13, 2005. The ASB describes procedures for removing the cover (bustle) of the door-mounted escape slides/rafts, and performing a tension check to determine if there is excessive tension of the firing cable of the escape slides/rafts. Additionally, the ASB describes procedures for removing excessive tension of the firing cable by providing necessary slack in the firing cable, or removing the slide and rerouting the firing cable if necessary. The ASB also specifies that a general visual inspection or a records check may be accomplished to determine if certain Goodrich door-mounted escape slide/rafts are installed.

The ASB refers to Goodrich Alert Service Bulletin 5A3294/5A3295-25A356, dated May 11, 2005, as an additional source of service information.

Goodrich has also issued the following packing instructions for the slide/rafts: Goodrich Packing Instructions, Evacuation Slide/Raft, Document 501636, Revision G, dated May 16, 2005; Goodrich Packing Instructions, Evacuation Slide/Raft, LH, Document 501637, Revision E, dated May 16, 2005; and Goodrich Packing Instructions, Evacuation Slide/Raft, RH, Document 501638, Revision D, dated May 16, 2005.

The unsafe condition described previously is likely to exist or develop on other airplanes of the same type design. Therefore, we are issuing this AD to prevent injury to maintenance personnel, passengers, and crew during otherwise normal operating conditions and to prevent interference with evacuation of the airplane during an emergency, due to uncommanded inflation of a door-mounted escape slide/raft. This AD requires accomplishing the actions specified in the service information described previously.

This is considered to be interim action. The manufacturer has advised that it currently is developing a modification that will address the unsafe condition addressed by this AD. Once this modification is developed, approved, and available, we may consider additional rulemaking.

An unsafe condition exists that requires the immediate adoption of this AD; therefore, providing notice and opportunity for public comment before the AD is issued is impracticable, and good cause exists to make this AD effective in less than 30 days.

This AD is a final rule that involves requirements that affect flight safety and was not preceded by notice and an opportunity for public comment; however, we invite you to submit any relevant written data, views, or arguments regarding this AD. Send your comments to an address listed under ADDRESSES. Include “Docket No. FAA-2005-21240; Directorate Identifier 2005-NM-104-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the AD. We will consider all comments received by the closing date and may amend the 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 AD. Using the search function of our docket 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 can review the DOT's complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477-78), or you can visit http://dms.dot.gov.

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 AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government.

For the reasons discussed above, I certify that the 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 AD. See the ADDRESSES section for a location to examine the regulatory evaluation.

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

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

2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD):