In making these changes, we do not intend to differ substantively from the information provided in the MCAI. These differences are highlighted in the ``Differences Between the FAA and the MCAI'' section in the proposed AD.

Costs of Compliance

We estimate that this proposed AD would affect 4 helicopters of U.S. registry. We also estimate that it would take 2.5 workhours to inspect and replace one hydraulic pump. The average labor rate is $80 per workhour. Each pump would cost about $26,000 and require two hydraulic pumps per helicopter. Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $209,600 to replace all the hydraulic pumps on the U.S. fleet.
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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 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 this 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 and placed it in the AD docket.

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 39AIRWORTHINESS 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 FAA amends Sec. 39.13 by adding the following new AD: Eurocopter France: Docket No. FAA20080430; Directorate Identifier 2007SW42AD.
Comments Due Date
(a) We must receive comments by May 22, 2008.
Other Affected ADs
(b) None.
Applicability
(c) This AD applies to Models AS332C, L, L1, and L2 helicopters, with a hydraulic pump made by MessierBugatti, part number C24160X, C24160XXX, C241600XX, C241600XXX, and C241600XXXXX, with a serial number without the suffix letter ``V'', listed in paragraph 1.A.1., of Eurocopter France Emergency Alert Service Bulletin 01.00.73, dated August 23, 2007 (ASB) installed, certificated in any category.

Note: The letter ``V'' is a suffix marked after the serial number on the pump's identification plate to signify that the pump has been determined to conform to the approved design data. Reason
(d) The mandatory continuing airworthiness information (MCAI) states:

This Airworthiness Directive (AD) is issued following two cases of LH hydraulic power system loss on two AS332 helicopters. In both cases, the pilot received the ``low level'' hydraulic failure alarm. The investigations conducted on the two helicopters revealed a hydraulic fluid leak from the hydraulic pump casing.

In both cases, incorrect position of the liner of the compensating piston had caused the seals to deteriorate. This incorrect positioning of the liner is due to noncompliant
application of the repair process by a repair station.

Deterioration of hydraulic pumps causes:
The loss of the RH and LH hydraulic power systems in the event of a substantial hydraulic fluid leak from both hydraulic pumps during a given flight.
The loss of the hydraulic system concerned, in the event of a substantial hydraulic fluid leak from only one pump.
Actions and Compliance
(e) Unless already done, do the following actions:
(1) Within 15 hours timeinservice (TIS), determine the part number and serial number of the installed hydraulic pumps. If the serial numbers of both the hydraulic pumps are listed in paragraph 1.A.1. of the ASB, before further flight, replace at least one of the pumps with an airworthy pump with a serial number other than one listed in paragraph 1.A.1. of the ASB or one with a serial number containing the letter ``V''. Replace the pump by following the Accomplishment Instructions, paragraph 2.B. of the ASB, except this AD does not require you to return the hydraulic pump to the manufacturer.
(2) Within the next 12 months, replace all remaining hydraulic pumps having a serial number listed in paragraph 1.A.1. of the ASB by following the Accomplishment Instructions, paragraph 2.B. of the ASB, except this AD does not require you to return the hydraulic pump to the manufacturer.
Differences Between the FAA AD and the MCAI
(f) We do not require the operator to return the hydraulic pump to the manufacturer nor do we require any action on noninstalled hydraulic pumps. Also, we changed ``flying hours'' to ``hours time inservice.''
Subject
(g) Air Transport Association of America (ATA) Code: 2913 Hydraulic Pump.
Other Information
(h) The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, Safety Management Group, FAA, has the authority to approve AMOCs for this AD, if requested, using the procedures found in 14 CFR 39.19. Send information to ATTN: Uday Garadi, Aviation Safety Engineer, Rotorcraft Directorate, Regulations and Guidance Group, Fort Worth, Texas 761930110, telephone (817) 2225123, fax (817) 2225961. (2) Airworthy Product: Use only FAAapproved corrective actions. Corrective actions are considered FAAapproved if they are approved by the State of Design Authority (or their delegated agent) if the State of Design has an appropriate bilateral agreement with the United States. You are required to assure the product is airworthy before it is returned to service.
(3) Reporting Requirements: For any reporting requirement in this AD, under the provisions of the Paperwork Reduction Act, the Office of Management and Budget (OMB) has approved the information collection requirements and has assigned OMB Control Number 2120 0056.
Related Information
(i) MCAI Airworthiness Directive No. F2007010, dated September 12, 2007, contains related information.

Issued in Fort Worth, Texas, on April 3, 2008.
Mark R. Schilling,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service. [FR Doc. E88641 Filed 42108; 8:45 am]
BILLING CODE 491013P

FOR FURTHER INFORMATION CONTACT Uday Garadi, Aviation Safety Engineer, FAA, Rotorcraft Directorate, Regulations and Guidance Group, Fort Worth, Texas 761930110, telephone (817) 2225123, fax (817) 2225961.