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###### Department of Transportation

###### Federal Aviation Administration 

          - 14 CFR Part 39 
          - [Docket No. FAA-2007-27859; Directorate Identifier 2007-CE-033-AD; Amendment 39-15049; AD 2007-10-08] 
          - RIN 2120-AA64 

# AGENCY:

Federal Aviation Administration (FAA), DOT. 

# ACTION:

Final rule; request for comments. 

# SUMMARY:

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

* * *failure of the Autopilot System Computer resulting in the possibility of an out of trim condition, which may lead to loss of aircraft control * * *

This AD requires actions that are intended to address the unsafe condition described in the MCAI. 

# DATES:

This AD becomes effective June 15, 2007. 

On June 15, 2007 the Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD. 

We must receive comments on this AD by June 11, 2007. 

# ADDRESSES:

You may send comments by any of the following methods: 
      -  DOT Docket Web Site:                          Go to                          http://dms.dot.gov                          and follow the instructions for sending your comments electronically.                     
      -  Fax:                          (202) 493-2251.                     
      -  Mail:                          Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street, SW., Nassif Building, Room PL-401, Washington, DC 20590-0001.                     
      -  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.                     
      -  Federal eRulemaking Portal: http://www.regulations.gov.                          Follow the instructions for submitting comments.                     

## 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 this AD, the regulatory evaluation, any comments received, and other information. The street address for the Docket Office (telephone (800) 647-5227) is in the                     **ADDRESSES**                     section. Comments will be available in the AD docket shortly after receipt.                 

# FOR FURTHER INFORMATION CONTACT:

Karl Schletzbaum, Aerospace Engineer, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-4146; fax: (816) 329-4090. 

# SUPPLEMENTARY INFORMATION:

## Streamlined Issuance of AD 

                    The FAA is implementing a new process for streamlining the issuance of ADs related to MCAI. The streamlined                           ( print page 26717)                        process will allow us to adopt MCAI safety requirements in a more efficient manner and will reduce safety risks to the public. This process continues to follow all FAA AD issuance processes to meet legal, economic, Administrative Procedure Act, and                     **Federal Register**                     requirements. We also continue to meet our technical decision-making responsibilities to identify and correct unsafe conditions on U.S.-certificated products.                 

This AD references the MCAI and related service information that we considered in forming the engineering basis to correct the unsafe condition. The AD contains text copied from the MCAI and for this reason might not follow our plain language principles. 

## Discussion 

The Civil Aviation Authority of New Zealand, which is the aviation authority for New Zealand, has issued DCA/750XL/12A, drafted: March 27, 2007, effective date: March 29, 2007 (referred to after this as “the MCAI”), to correct an unsafe condition for the specified products. The MCAI states:

* *  *failure of the Autopilot System Computer resulting in the possibility of an out of trim condition, which may lead to loss of aircraft control * * *

The MCAI requires disconnection of the autopilot, inspection of the pitch servo, and modification of the autopilot pitch trim circuit. You may obtain further information by examining the MCAI in the AD docket. 

## Relevant Service Information 

Pacific Aerospace Limited has issued Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI. 

## FAA's Determination and Requirements of the AD 

This product has been approved by the aviation authority of another country, and is approved for operation in the United States. Pursuant to our bilateral agreement with this State of Design Authority, they have notified us of the unsafe condition described in the MCAI and service information referenced above. We are issuing this AD because we evaluated all information provided by the State of Design Authority and determined the unsafe condition exists and is likely to exist or develop on other products of the same type design. 

Currently within the United States there are no known Pacific Aerospace Limited Model 750XL airplanes with an S-Tec X55 autopilot system installed. There are no products of this type currently registered in the United States. However, this rule is necessary to ensure that the described unsafe condition is addressed if any of these products are placed on the U.S. Register in the future. 

## 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. 

## Comments Invited 

Since there are currently no domestic operators of this product, notice and opportunity for public comment before issuing this AD are unnecessary. 

                    This AD is a final rule that involves requirements affecting flight safety, and we did not precede it by notice and opportunity for public comment. We invite you to send any written relevant data, views, or arguments about this AD. Send your comments to an address listed under the                     **ADDRESSES**                     section. Include “Docket No. FAA-2007-27859; Directorate Identifier 2007-CE-033-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this AD. We will consider all comments received by the closing date and may amend this AD because 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 we receive about this AD.                 

## 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 that 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. 

# 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 amends14 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 

2. The FAA amends § 39.13 by adding the following new AD: 

**2007-10-08 Pacific Aerospace Limited:**                             Amendment 39-15049; Docket No. FAA-2007-27859; Directorate Identifier 2007-CE-033-AD.                         

## Effective Date 

                            (a) This airworthiness directive (AD) becomes effective June 15, 2007.                                   ( print page 26718)    

## Affected ADs 

(b) None. 

## Applicability 

(c) This AD applies to Model 750XL airplanes, serial numbers 125, 126, and 127, certificated in any category. 

## Subject 

(d) Air Transport Association of America (ATA) Code 22: Autopilot. 

## Reason 

(e) The mandatory continuing airworthiness information (MCAI) states: 

* * * failure of the Autopilot System Computer resulting in the possibility of an out of trim condition, which may lead to loss of aircraft control* * * 

## Actions and Compliance 

(f) Unless already done, do the following actions before further flight. 

(1) Modify the autopilot pitch trim circuit with additional protective features following Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007. 

(2) Inspect the Pitch Servo to confirm part number (P/N) 108-15-P1 is installed following Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007. 

(i) If Pitch Servo P/N 108-15-P1 is installed, no further action is necessary. 

(ii) If Pitch Servo P/N 108-15-P1 is not installed, replace the Pitch Servo with P/N 108-15-P1 following Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007. 

## FAA AD Differences 

# Note:

This AD differs from the MCAI and/or service information as follows: 

(1) The MCAI requires an interim action of disconnecting the autopilot following Pacific Aerospace Limited Alert Service Bulletin PACSB/XL/001, dated February 16, 2007. Since there are no products of this type currently registered in the United States, and Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007, supersedes Pacific Aerospace Limited Alert Service Bulletin PACSB/XL/001, dated February 16, 2007, we are not requiring disconnection of the autopilot. Instead we require the autopilot comply with the terminating actions in Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007. 

(2) The MCAI allows modification of the pitch trim circuit within 150 hours time-in-service. Since there are no products of this type currently registered in the United States, we are requiring modification of the pitch trim circuit before a domestic airworthiness certificate can be issued.

## Other FAA AD Provisions 

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

                            (1)                             *Alternative Methods of Compliance (AMOCs):*                             The Manager, Small Airplane Directorate, 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: Karl Schletzbaum, Aerospace Engineer, 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/12A, drafted: March 27, 2007, effective date: March 29, 2007; and Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 2007, for related information. 

## Material Incorporated by Reference 

(i) You must use Pacific Aerospace Limited Mandatory Service Bulletin PACSB/XL/025, dated March 5, 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 Limited, Hamilton Airport, Private Bag HN3027, Hamilton, New Zealand; telephone: (64) 7-843-6144; fax: (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/​code_​of_​federal_​regulations/​ibr_​locations.html*.                         

Issued in Kansas City, Missouri on May 4, 2007. 

Charles L. Smalley, 

Acting Manager, Small Airplane Directorate,  Aircraft Certification Service.

 [FR Doc. E7-8993 Filed 5-10-07; 8:45 am] 

BILLING CODE 4910-13-P