2011-11752. Airworthiness Directives; Eurocopter France Model EC 120B Helicopters

AGENCY:

Federal Aviation Administration, DOT.

ACTION:

Notice of proposed rulemaking (NPRM).

SUMMARY:

We propose to adopt a new airworthiness directive (AD) for the specified Eurocopter France Model EC 120B helicopters. This proposed AD would require modifying the pilot cyclic control friction device by replacing a certain thrust washer with two thrust washers. This proposed AD is prompted by an incident in which the pilot encountered a sudden restriction of the cyclic control movement during flight. The actions specified by this proposed AD are intended to prevent jamming of a pilot cyclic control stick and subsequent loss of control of the helicopter.

DATES:

Comments must be received on or before July 12, 2011.

ADDRESSES:

Use one of the following addresses to submit comments on this proposed AD:

• Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
• Fax: [phone].
• 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 W12-140, 1200 New Jersey Avenue, SE., Washington, DC 20590, between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.

You may get the service information identified in this proposed AD from American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, Texas 75053-4005, telephone [phone], fax [phone].

You may examine the comments to this proposed AD in the AD docket on the Internet at http://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT:

Gary Roach, Aviation Safety Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, Texas 76137, telephone [phone], fax [phone].

SUPPLEMENTARY INFORMATION:

Comments Invited

We invite you to submit any written data, views, or arguments regarding this proposed AD. Send your comments to the address listed under the caption ADDRESSES. Include the docket number “FAA-2011-0448, Directorate Identifier 2007-SW-51-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://www.regulations.gov, including any personal information you provide. We will also post a report summarizing each substantive verbal contact with FAA personnel concerning this proposed rulemaking. Using the search function of the docket Web site, you can find and read the comments to any of our dockets, including the name of the individual who sent or signed the comment. You may review the DOT's complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477-78).

Examining the Docket

You may examine the docket that contains the proposed AD, any comments, and other information in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Operations office (telephone [phone]) is located in Room W12-140 on the ground floor of the West Building at the street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.

Discussion

The Direction Generale de l'Aviation Civile France (DGAC), which is the aviation authority for France, has issued French AD No. F-2005-175, dated October 26, 2005, on behalf of the European Aviation Safety Agency (EASA), the Airworthiness Authority of the State of Design for the affected helicopters, to correct an unsafe condition for the Eurocopter France Model EC 120B helicopters.

Related Service Information

Eurocopter has issued Alert Service Bulletin No. 67A011, Revision 1, dated October 7, 2005 (ASB), which specifies a modification to preclude the risk that the pilot cyclic control stick will jam. The modification consists of replacing the existing single-piece thrust washer, part number (P/N) C671A1006201, with two thrust washers, P/N C671A1018201 and P/N C671A1019201. The DGAC classified this alert service bulletin as mandatory and issued AD No. F-2005-175, dated October 26, 2005, to ensure the continued airworthiness of these helicopters.

FAA's Evaluation and Unsafe Condition Determination

This product has been approved by the aviation authority of France and is approved for operation in the United States. Pursuant to our bilateral agreement with France, the DGAC, on behalf of the EASA, their technical representative, has notified us of the unsafe condition described in the DGAC AD. We are proposing this AD because we evaluated all information provided by the DGAC and determined the unsafe condition exists and is likely to exist or develop on other products of the same type design. This proposed AD would require replacing a single-piece thrust washer, P/N C671A1006201, with two thrust washers, P/N C671A1018201 and P/N C671A1019201, to prevent the jamming of the pilot cyclic control stick.

Differences Between This Proposed AD and the DGAC AD

The DGAC AD requires compliance with the ASB no later than December 31, 2005. Our proposed AD would require compliance within 30 days after the effective date of the AD.

Costs of Compliance

We estimate that this proposed AD would affect 114 helicopters of U.S. registry and the proposed actions would take approximately 3 work hours per helicopter to accomplish at an average labor rate of $85 per work hour. Required parts would cost approximately $50 per helicopter. Based on these figures, we estimate the total cost impact of the proposed AD on U.S. operators would be $34,770 for the entire fleet, or $305 per helicopter, to replace the single thrust washer with two thrust washers.

Regulatory Findings

We have determined that this proposed AD would not have federalism implications under Executive Order 13132. Additionally, 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 an economic evaluation of the estimated costs to comply with this proposed AD. See the AD docket to examine the economic evaluation.

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.

List of Subjects in 14 CFR Part 39

• Air transportation
• Aircraft
• Aviation safety
• Safety

The Proposed Amendment

Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration proposes to amend part 39 of the Federal Aviation Regulations (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. Section 39.13 is amended by adding a new airworthiness directive to read as follows:

Eurocopter France: Docket No. FAA-2011-0448; Directorate Identifier 2007-SW-51-AD.

Applicability: Model EC 120B helicopters, serial numbers up to and including 1385, with a thrust washer, part number (P/N) C671A1006201, installed on the pilot cyclic control stick friction device; and a pilot cyclic stick, P/N C671A1007101, P/N C671A1007102, or C671A1003102, installed, certificated in any category.

Compliance: Required within 30 days, unless accomplished previously.

To prevent jamming of a pilot cyclic control stick and subsequent loss of control of the helicopter, accomplish the following:

(a) Remove the pilot cyclic control stick; replace the thrust washer, P/N C671A1006201, with two thrust washers, P/N C671A1018201 and P/N C671A1019201; reinstall the pilot cyclic control stick; and perform a functional test of the cyclic control.

(b) To request a different method of compliance or a different compliance time for this AD, follow the procedures in 14 CFR 39.19. Contact the Manager, Safety Management Group, Rotorcraft Directorate, FAA, ATTN: Gary Roach, Aviation Safety Engineer, Regulations and Policy Group, ASW-111, 2601 Meacham Blvd., Fort Worth, Texas 76137, telephone [phone], fax [phone], for information about previously approved alternative methods of compliance.

(c) The Joint Aircraft System/Component (JASC) Code is 2700: Flight Control System.

Note:

The subject of this AD is addressed in Direction Generale de l'Aviation Civile (France) AD No. F-2005-175, dated October 26, 2005, and Eurocopter Alert Service Bulletin No. 67A011, Revision 1, dated October 7, 2005

.

Issued in Fort Worth, Texas, on April 27, 2011.

Scott A. Horn,

Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.