Airworthiness Directives; Eurocopter France Model EC120 Helicopters, 7056-7057 [05-2586]

Agencies

• Federal Aviation Administration
• DEPARTMENT OF TRANSPORTATION

[Federal Register Volume 70, Number 27 (Thursday, February 10, 2005)]
[Proposed Rules]
[Pages 7056-7057]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 05-2586]


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

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2005-20289; Directorate Identifier 2003-SW-55-AD]
RIN 2120-AA64


Airworthiness Directives; Eurocopter France Model EC120 
Helicopters

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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

SUMMARY: This document proposes adopting a new airworthiness directive 
(AD) for Eurocopter France (Eurocopter) Model EC120 helicopters. This 
proposal would require inspecting the tail rotor drive shaft (drive 
shaft) damper half-clamps (half-clamps) to determine if they are 
centered on the friction ring, and if not correctly positioned, 
centering the half-clamps on the friction ring. This proposal is 
prompted by the discovery of half-clamps that were incorrectly 
positioned. This condition, if not detected, could result in 
interference of the two half-clamps with the drive shaft, which could 
result in scoring on the drive shaft, failure of the drive shaft, and 
subsequent loss of control of the helicopter.

DATES: Comments must be received on or before April 11, 2005.

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; or
     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.
    You may get the service information identified in this proposed AD 
from American Eurocopter Corporation, 2701 Forum Drive, Grand Prairie, 
Texas 75053-4005, telephone (972) 641-3460, fax (972) 641-3527.
    You may examine the comments to this proposed AD in the AD docket 
on the Internet at https://dms.dot.gov.

FOR FURTHER INFORMATION CONTACT: Eric Haight, Aviation Safety Engineer, 
FAA, Rotorcraft Directorate, Regulations and Policy Group, Fort Worth, 
Texas 76193-0111, telephone (817) 222-5204, fax (817) 222-5961.

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-2005-
20289, Directorate Identifier 2003-SW-55-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 rulemaking. Using the search 
function of our 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) or you may visit https://dms.dot.gov.

Examining the Docket

    You may examine the docket that contains the proposed AD, any 
comments, and other information in person at the Docket Management 
System (DMS) Docket Office between 9 a.m. and 5 p.m., Monday through 
Friday, except Federal holidays. The Docket Office (telephone 1-800-
647-5227) is located at the plaza level of the Department of 
Transportation NASSIF Building in Room PL-401 at 400 Seventh Street, 
SW., Washington, DC. Comments will be available in the AD docket 
shortly after the DMS receives them.

Discussion

    The Direction Generale De L'Aviation Civile (DGAC), the 
airworthiness authority for France, notified the FAA that an unsafe 
condition may exist on Eurocopter Model EC120B helicopters. The DGAC 
advises of the discovery of a case of incorrect drive shaft damper 
positioning, which led to interference of the two half-clamps with the 
drive shaft tube and caused a score on the drive shaft.
    Eurocopter has issued Alert Telex No. 65A004, Revision 1, dated 
January 27, 2004, which specifies re-positioning of the drive shaft 
damper, if necessary. The DGAC classified this alert telex as mandatory 
and issued AD No. UF-2003-465, dated December 22, 2003, and AD No. F-
2003-465(A), dated January 21, 2004, to ensure the continued 
airworthiness of these helicopters in France.
    This helicopter model is manufactured in France and is type 
certificated for operation in the United States under the provisions of 
14 CFR 21.29 and the applicable bilateral agreement. Pursuant to the 
applicable bilateral agreement, the DGAC has kept us informed of the 
situation described above. We have examined the findings of the DGAC, 
reviewed all available information, and determined that AD action is 
necessary for products of this type design that are certificated for 
operation in the United States.

[[Page 7057]]

    This previously described unsafe condition is likely to exist or 
develop on other helicopters of the same type design registered in the 
United States. Therefore, the proposed AD would require, for Eurocopter 
Model EC120B helicopters, serial number 1362 and below, a one-time 
inspection of the half-clamps to determine if they are centered on the 
friction ring, and if they are not, centering the half-clamps on the 
friction ring. The actions would have to be accomplished within 50 
hours time-in-service (TIS) for helicopters with 500 or more hours TIS; 
or no later than 550 hours TIS for helicopters with less than 500 hours 
TIS, in accordance with the alert telex described previously.
    We estimate that this proposed AD would affect 78 helicopters of 
U.S. registry. The one-time inspection would take approximately 2 work 
hours to accomplish, and the modification would take 6 work hours, at 
an average labor rate of $65 per work hour. Required modification parts 
would cost approximately $180 per helicopter. Based on these figures, 
we estimate the total cost impact of the proposed AD on U.S. operators 
would be $14,700, assuming 8 helicopters would need modification.

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 a draft economic evaluation of the estimated costs to 
comply with this proposed AD. See the DMS to examine the draft 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.


Sec.  39.13  [Amended]

    2. Section 39.13 is amended by adding a new airworthiness directive 
to read as follows:

Eurocopter France: Docket No. FAA-2005-20289; Directorate Identifier 
2003-SW-55-AD.

    Applicability: Model EC120B helicopters, serial number 1362 and 
below, certificated in any category.
    Compliance: Required within 50 hours time-in-service (TIS) for 
helicopters with 500 or more hours TIS; or no later than 550 hours 
TIS for helicopters with less than 500 hours TIS, unless 
accomplished previously.
    To detect incorrect positioning of the tail rotor drive shaft 
(drive shaft) damper half-clamps (half-clamps), and to prevent 
interference of the half-clamps with the drive shaft, which could 
result in scoring on the drive shaft, failure of the drive shaft, 
and subsequent loss of control of the helicopter, accomplish the 
following:
    (a) Inspect the half-clamps, part number C651A4103201 or 
C651A4103202, to determine if they are centered on the friction 
ring, using the Operational Procedure, paragraph 2.B., of Eurocopter 
Alert Telex No. 65A004, Revision 1, dated January 27, 2004 (Alert 
Telex). If the half-clamps are not centered on the friction ring, 
center the half-clamps on the friction ring in accordance with the 
Operational Procedure, paragraph 2.B, and Rework Sheet No. EC 120-
53-02-04 in Appendix 1 of the Alert Telex.
    (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 Safety Management Group, Rotorcraft Directorate, FAA, 
for information about previously approved alternative methods of 
compliance.
    (c) Special flight permits will not be issued.

    Note: The subject of this AD is addressed in Direction Generale 
De L'Aviation Civile (France) AD No. UF-2003-465, dated December 22, 
2003, and AD No. F-2003-465, Revision A, dated January 21, 2004.


    Issued in Fort Worth, Texas, on February 1, 2005.
David A. Downey,
Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 05-2586 Filed 2-9-05; 8:45 am]
BILLING CODE 4910-13-P