AD 2010-13400

[Federal Register Volume 75, Number 109 (Tuesday, June 8, 2010)] [Rules and Regulations] [Pages 32251-32253] From the Federal Register Online via the Government Publishing Office [www.gpo.gov] [FR Doc No: 2010-13400]

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Federal Register / Vol. 75, No. 109 / Tuesday, June 8, 2010 / Rules

and Regulations

[[Page 32251]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2010-0250 Directorate Identifier 2010-CE-011-AD;

Amendment 39-16325; AD 2010-12-04]

RIN 2120-AA64

Airworthiness Directives; PILATUS Aircraft Ltd. Model PC-7

Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of

Transportation (DOT).

ACTION: Final Rule.

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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 an aviation authority of

another country to identify and correct an unsafe condition on an

aviation product. The MCAI describes the unsafe condition as:

This Airworthiness Directive (AD) is prompted due to the

discovery of corrosion at the bonding strap connections on the left

and right lower longerons between fuselage frames 1 and 1A. The

possibility of corrosion is increased because of the high electrical

current flow between the tinned copper terminal lug of the bonding

strap and the aluminum longeron.

Such a condition, if left uncorrected, could lead to failure of

the longeron and will prejudice the structural integrity of the

aircraft.

We are issuing this AD to require actions to correct the unsafe

condition on these products.

DATES: This AD becomes effective July 13, 2010.

On July 13, 2010, the Director of the Federal Register approved the

incorporation by reference of certain publications listed in this AD.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the Document Management Facility,

U.S. Department of Transportation, Docket Operations, M-30, West

Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE.,

Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Doug Rudolph, Aerospace Engineer, FAA,

Small Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri

64106; telephone: (816) 329-4059; fax: (816) 329-4090.

SUPPLEMENTARY INFORMATION:

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 March 15, 2010 (75

FR 12150). That NPRM proposed to correct an unsafe condition for the

specified products. The MCAI states:

This Airworthiness Directive (AD) is prompted due to the

discovery of corrosion at the bonding strap connections on the left

and right lower longerons between fuselage frames 1 and 1A. The

possibility of corrosion is increased because of the high electrical

current flow between the tinned copper terminal lug of the bonding

strap and the aluminum longeron.

Such a condition, if left uncorrected, could lead to failure of

the longeron and will prejudice the structural integrity of the

aircraft.

In order to correct and control the situation, this AD requires

a one time inspection of the longeron structure and the terminal

lugs of the bonding straps for signs of corrosion.

For left and right lower longerons where corrosion is found during the

inspection, the MCAI also requires repair of any longeron where

corrosion is found.

Comments

We gave the public the opportunity to participate in developing

this AD. We considered the comment received. The commenter supports the

NPRM.

Conclusion

We reviewed the available data, including the comment received, and

determined that air safety and the public interest 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 10 products of U.S. registry.

We also estimate that it will take about 4.5 work-hours per product to

comply with the basic requirements of this AD. The average labor rate

is $85 per work-hour.

Based on these figures, we estimate the cost of this AD to the U.S.

operators to be $3,825 or $383 per product.

In addition, we estimate that any necessary follow-on actions will

take about 3 work-hours and require parts costing $500, for a cost of

$755 per product. We have no way of determining the number of products

that may need these actions.

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.

[[Page 32252]]

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://www.regulations.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

0

Accordingly, under the authority delegated to me by the Administrator,

the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0

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]

0

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

2010-12-04 PILATUS Aircraft Ltd.: Amendment 39-16325; Docket No.

FAA-2010-0250; Directorate Identifier 2010-CE-011-AD.

Effective Date

(a) This airworthiness directive (AD) becomes effective July 13,

2010.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Model PC-7 airplanes, all serial numbers,

certificated in any category.

Subject

(d) Air Transport Association of America (ATA) Code 53:

Fuselage.

Reason

(e) The mandatory continuing airworthiness information (MCAI)

states:

This Airworthiness Directive (AD) is prompted due to the

discovery of corrosion at the bonding strap connections on the left

and right lower longerons between fuselage frames 1 and 1A. The

possibility of corrosion is increased because of the high electrical

current flow between the tinned copper terminal lug of the bonding

strap and the aluminum longeron.

Such a condition, if left uncorrected, could lead to failure of

the longeron and will prejudice the structural integrity of the

aircraft. In order to correct and control the situation, this AD

requires a one time inspection of the longeron structure and the

terminal lugs of the bonding straps for signs of corrosion.

For left and right lower longerons where corrosion is found during

the inspection, the MCAI also requires repair of any longeron where

corrosion is found.

Actions and Compliance

(f) Unless already done, do the following actions:

(1) Within the next 120 days after July 13, 2010 (the effective

date of this AD), perform a visual inspection of the forward bonding

points and the terminal lugs on the left and right lower longerons

between fuselage frames 1 and 1A for signs of corrosion. Do the

inspection following paragraphs 3.C.(1), (2), and (3) of PILATUS PC-

7 Service Bulletin No. 53-007, dated January 5, 2010.

(2) If any signs of corrosion are found during the inspection

required in paragraph (f)(1) of this AD, prior to further flight,

perform corrective actions in accordance with the Accomplishment

Instructions in paragraph 3.D of PILATUS PC-7 SB No. 53-007, dated

January 5, 2010. If the corrosion damage is out of limits, record

the values; apply to PILATUS for a repair scheme at: PILATUS

AIRCRAFT LTD., Customer Service Manager, CH-6371 STANS, Switzerland;

telephone: +41 (0) 41 619 62 08; fax: +41 (0) 41 619 73 11; and

implement the repair scheme.

Note 1: The Federal Office of Civil Aviation (FOCA), which is

the airworthiness authority for Switzerland, will work with PILATUS

in reviewing the results of the initial inspection as specified in

PILATUS PC-7 Service Bulletin No. 53-007, dated January 5, 2010.

From this, a repetitive inspection requirement or other action may

be established. The FAA will evaluate any such action and determine

whether further rulemaking is necessary.

FAA AD Differences

Note 2: 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: Doug Rudolph, Aerospace Engineer, FAA, Small

Airplane Directorate, 901 Locust, Room 301, Kansas City, Missouri

64106; telephone: (816) 329-4059; 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 FOCA AD HB-2010-001, dated February 12, 2010;

and PILATUS PC-7 Service Bulletin No. 53-007, dated January 5, 2010,

for related information.

Material Incorporated by Reference

(i) You must use PILATUS PC-7 Service Bulletin No. 53-007, dated

January 5, 2010, 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

PILATUS AIRCRAFT LTD., Customer Service Manager, CH-6371 STANS,

Switzerland; telephone: +41 (0) 41 619 62 08; fax: +41 (0) 41 619 73

11; Internet: http://www.pilatus-aircraft.com.

(3) You may review copies of the service information

incorporated by reference for this AD at the FAA, Central Region,

Office of the Regional Counsel, 901 Locust, Kansas City, Missouri

64106. For information on the availability of this material at the

Central Region, call (816) 329-3768.

(4) You may also review copies of the service information

incorporated by reference for this AD at the National Archives and

Records Administration (NARA). For

[[Page 32253]]

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 27, 2010.

Steven W. Thompson,

Acting Manager, Small Airplane Directorate, Aircraft Certification

Service.

[FR Doc. 2010-13400 Filed 6-7-10; 8:45 am]

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