AD 2007-14-04

We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

To prevent the rudder trim tab upper pivot hole in the rudder rib flogging out, which may lead to aerodynamic flutter and possible loss of aircraft control * * *

We are issuing this AD to require actions to correct the unsafe condition on these products.

Final rule.

2007-14-04 Pacific Aerospace Corporation, Ltd: Amendment 39-15126; Docket No. FAA-2007-27863; Directorate Identifier 2007-CE-037-AD.

Effective Date

(a) This airworthiness directive (AD) becomes effective August 16, 2007.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Model 750XL airplanes, all serial numbers, that are:
(1) Not fitted with modification PAC/XL/0267 (upper bearing part number (P/N) 11-33121-1); and
(2) certificated in any category.

Subject

(d) Air Transport Association of America (ATA) Code 55: Stabilizers.

Reason

(e) The mandatory continuing airworthiness information (MCAI) states:
To prevent the rudder trim tab upper pivot hole in the rudder rib flogging out, which may lead to aerodynamic flutter and possible loss of aircraft control * * *

To correct the unsafe condition, you must inspect the rudder trim tab upper pivot for any lateral movement of the bush. If you find any lateral movement of the bush, install modification PAC/XL/0267.

Actions and Compliance

(f) Unless already done, do the following actions:
(1) Within the next 150 hours time-in-service (TIS) after August 16, 2007 (the effective date of this AD) and thereafter at intervals not to exceed 150 hours TIS, inspect the rudder trim tab upper pivot following the instructions in Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/023, dated February 15, 2007.

(i) If there is any lateral movement of the bush found in any inspection required in paragraph (f)(1) of this AD, before further flight, install modification PAC/XL/0267 following Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/023, dated February 15, 2007; and Pacific Aerospace Ltd Drawing No. 11-03131, Drawing Approved Date: February 17, 2007.

(ii) Modification PAC/XL/0267 comprises removing the upper bush P/N 11-33119-1 and installing upper bearing P/N 11-33121-1 following Pacific Aerospace Ltd Drawing No. 11-03131, Drawing Approved Date: February 17, 2007. Modification PAC/XL/0267 is a terminating action to the requirements of this AD.

(2) Within the next 450 hours TIS after August 16, 2007 (the effective date of this AD) or within the next 24 months after August 16, 2007 (the effective date of this AD), whichever occurs first, modify the rudder trim tab upper pivot with modification PAC/XL/0267 following Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/023, dated February 15, 2007; and Pacific Aerospace Ltd Drawing No. 11-03131, Drawing Approved Date: February 17, 2007.

FAA AD Differences

Note: This AD differs from the MCAI and/or service information as follows: No differences.

Other FAA AD Provisions

(g) The following provisions also apply to this AD:

(1) Alternative Methods of Compliance (AMOCs): The Manager, Standards Staff, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. Send information toATTN: Karl Schletzbaum, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4146; fax: (816) 329-4090. Before using any approved AMOC on any airplane to which the AMOC applies, notify your appropriate principal inspector (PI) in the FAA Flight Standards District Office (FSDO), or lacking a PI, your local FSDO.

(2) Airworthy Product: For any requirement in this AD to obtain corrective actions from a manufacturer or other source, use these actions if they are FAA-approved. Corrective actions are considered FAA-approved if they are approved by the State of Design Authority (or their delegated agent). 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 (44 U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has approved the information collection requirements and has assigned OMB Control Number 2120-0056.

Related Information

(h) Refer to MCAI Civil Aviation Authority of New Zealand AD DCA/750XL/11, dated March 29, 2007; Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/023, dated February 15, 2007; and Pacific Aerospace Ltd Drawing No. 11-03131, Drawing Approved Date: February 17, 2007, for related information.

Material Incorporated by Reference

(i) You must use Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/023, dated February 15, 2007; and Pacific Aerospace Ltd Drawing No. 11-03131, Drawing Approved Date: February 17, 2007, to do the actions required by this AD, unless the AD specifies otherwise.

(1) The Director of the Federal Register approved the incorporation by reference of this service information under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) For service information identified in this AD, contact Pacific Aerospace Corporation Ltd., Hamilton Airport, Private Bag HN 3027, Hamilton, New Zealand; telephone: 011 (64) 7-843-6144; fax: 011 (64) 7-843-6134.

(3) You may review copies at the FAA, Central Region, Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106; or at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html .

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to include an AD that would apply to the specified products. That NPRM was published in the Federal Register on May 18, 2007 (72 FR 28003). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states:

To prevent the rudder trim tab upper pivot hole in the rudder rib flogging out, which may lead to aerodynamic flutter and possible loss of aircraft control * * *

To correct the unsafe condition, you must inspect the rudder trim tab upper pivot for any lateral movement of the bush. If you find any lateral movement of the bush, install modification PAC/XL/0267.

Comments

We gave the public the opportunity to participate in developing this AD. We received no comments on the NPRM or on the determination of the cost to the public.

Conclusion

We reviewed the available data and determined that air safety and the publicinterest require adopting the AD as proposed.

Differences Between This AD and the MCAI or Service Information

We have reviewed the MCAI and related service information and, in general, agree with their substance. But we might have found it necessary to use different words from those in the MCAI to ensure the AD is clear for U.S. operators and is enforceable. In making these changes, we do not intend to differ substantively from the information provided in the MCAI and related service information.

We might also have required different actions in this AD from those in the MCAI in order to follow FAA policies. Any such differences are highlighted in a Note within the AD.

Costs of Compliance

We estimate that this AD will affect 7 products of U.S. registry. We also estimate that it will take about 16 work-hours per product to comply with basic requirements of this AD. The average labor rate is $80 per work-hour. Required parts will cost about $1,000 per product. Where the service information lists required parts costs that are covered under warranty, we have assumed that there will be no charge for these parts. As we do not control warranty coverage for affected parties, some parties may incur costs higher than estimated here.

Based on these figures, we estimate the cost of this AD to the U.S. operators to be $15,960 or $2,280 per product.

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 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 this AD:

(1) Is not a "significant regulatory action'' under Executive Order 12866;
(2) Is not a "significant rule'' under 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 and placed it in the AD Docket.

Examining the AD Docket

You may examine the AD docket on the Internet at http://dms.dot.gov ; or in person at the Docket Management Facility between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The AD docket contains the NPRM, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (telephone (800) 647-5527) is in the ADDRESSES section. Comments will be available in the AD docket shortly after receipt.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 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. The FAA amends Sec. 39.13 by adding the following new AD: