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CFR Citation: 14 CFR Part 39

Docket ID: [Docket No. FAA-2008-0470; Directorate Identifier 2008-CE-026-AD]

RIN ID: RIN 2120-AA64

NOTICE: PROPOSED RULES

ACTION: Airworthiness Directives:

DOCUMENT ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of the comment period.

SUBJECT CATEGORY: Airworthiness Directives; APEX Aircraft Model CAP 10 B Airplanes

DATES: We must receive comments on this proposed AD by July 14, 2008.

DOCUMENT SUMMARY: We are revising an earlier NPRM for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated 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:

An internal review evidenced that the flight controls tie rod bolts currently installed on the airplane are not in accordance with the design data. Indeed the bolt shank length has been determined too short and the material properties of the spacers have been found inadequate according to the prescribed torque value.

Therefore, bolts' threads could be subject to excessive wear, which might induce play in flight controls and consequently, induce vibrations in the control surfaces and reduce the airplane handling. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

SUMMARY: APEX Aircraft Model CAP 10 B Airplanes,

SUPPLEMENTAL INFORMATION

We invite you to send any written relevant data, views, or arguments about this proposed AD. Send your comments to an address listed under the ADDRESSES section. Include ``Docket No. FAA20080470; Directorate Identifier 2008CE026AD'' at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of this proposed AD. We will consider all comments received by the closing date and may amend this proposed AD because 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 we receive about this proposed AD.

Discussion

We proposed to amend 14 CFR part 39 with an earlier NPRM for the specified products, which was published in the Federal Register on April 23, 2008 (73 FR 21851). That earlier NPRM proposed to require actions intended to address the unsafe condition for the products listed above.

Since that NPRM was issued, we have determined that the applicability as stated in the NPRM does not include all serial numbers that could incorporate fibre carbon wing spars as stated in the applicability of the MCAI.

Relevant Service Information

APEX Aircraft has issued Service Bulletin No. 040206, dated September 21, 2007. The actions described in this service information are intended to correct the unsafe condition identified in the MCAI. 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.

FAA's Determination and Requirements of the Proposed 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 proposing this AD because we evaluated all information and determined the unsafe condition exists and is likely to exist or develop on other products of the same type design.

Certain changes described above expand the scope of the earlier NPRM. As a result, we have determined that it is necessary to reopen the comment period to provide additional opportunity for the public to comment on the proposed AD.
Differences Between This Proposed 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 [[Page 33739]]

provided in the MCAI and related service information.

We might also have proposed 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 proposed AD.

Costs of Compliance

We estimate that this proposed AD will affect 31 products of U.S. registry. We also estimate that it would take about 3 workhours per product to comply with the basic requirements of this proposed AD. The average labor rate is $80 per workhour. Required parts would cost about $100 per product.

Based on these figures, we estimate the cost of the proposed AD on U.S. operators to be $10,540, or $340 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 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 a regulatory 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: APEX Aircraft: Docket No. FAA20080470; Directorate Identifier 2008CE026AD.
Comments Due Date
(a) We must receive comments by July 14, 2008.
Affected ADs
(b) None.
Applicability
(c) This AD applies to the following Model CAP 10 B airplanes, certificated in any category:
(1) Serial numbers 300 through 317; and
(2) All other serial numbers that incorporate APEX change 000302 (fibre carbon wing spars).
Subject
(d) Air Transport Association of America (ATA) Code 27: Flight Controls.
Reason
(e) The mandatory continuing airworthiness information (MCAI) states:

An internal review evidenced that the flight controls tie rod bolts currently installed on the airplane are not in accordance with the design data. Indeed the bolt shank length has been determined too short and the material properties of the spacers have been found inadequate according to the prescribed torque value.

Therefore, bolts' threads could be subject to excessive wear, which might induce play in flight controls and consequently, induce vibrations in the control surfaces and reduce the airplane handling.

To prevent this condition, the present Airworthiness Directive (AD) mandates replacement of the tie rod bolts and spacers. Actions and Compliance
(f) Unless already done, do the following actions:
(1) Within 50 hours timeinservice after the effective date of this AD, remove tie rod bolts part number (P/N) 95.56.11.066 and spacers P/N 11.56.27.038 and replace them with tie rod bolts P/N 95.56.11.418 and spacers P/N 11.56.27.138, following APEX Aircraft Service Bulletin No. 040206, dated September 21, 2007.
(2) As of the effective date of this AD, do not install any tie rod bolts P/N 95.56.11.066 or spacers P/N 11.56.27.038.

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 Office, 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: Sarjapur Nagarajan, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 3294145; fax: (816) 3294090. 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 FAAapproved. Corrective actions are considered FAAapproved 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 21200056.
Related Information
(h) Refer to MCAI European Aviation Safety Agency (EASA) AD No. 20080060, dated April 1, 2008; and APEX Aircraft Service Bulletin No. 040206, dated September 21, 2007, for related information.

Issued in Kansas City, Missouri, on June 6, 2008. David R. Showers,
Acting Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. E813319 Filed 61208; 8:45 am]
BILLING CODE 491013P

FOR FURTHER INFORMATION CONTACT Sarjapur Nagarajan, Aerospace Engineer, FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 3294145; fax: (816) 3294090.