Aerospatiale

The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of November 3, 2008.

ADDRESSES: You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the U.S. Department of Transportation, Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue, SE., Washington, DC.

FOR FURTHER INFORMATION CONTACT: Tom Rodriguez, Aerospace Engineer, International Branch, ANM-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone (425) 227-1137; fax (425) 227-1149.

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 June 10, 2008 (73 FR 32659). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI states:

One ATR 42-300 experienced a collapse of the Right (RH) Main Landing Gear (MLG) when taxiing, caused by failure of the side brace assembly. Investigations revealed a crack propagation that occurred from a corrosion pit, in a very high stressed area of the upper arm. Dimensions of the corrosion pit were lower than the minimum defect size that can be detected by usual inspection means used during landing gear overhaul. The superseded EASA (European Aviation Safety Agency) Airworthiness Directive (AD) 2007-0112 was issued to require repetitive inspections on affected high stressed areas on MLG side brace assemblies for crack detection and to replace the affected side brace assembly if any defect was found.

Since the issuance of [EASA] AD 2007-0112, a modification of [the] side brace upper arm has been developed as terminating action. However, production non-conformity of the inspection tool was discovered.

In order to correct the discrepancy of the initial tool, new inspection tool components have been manufactured and the Service Bulletin (SB) Messier Dowty 631-32-191 has been updated to revision 2 accordingly. This directive mandates re-inspection of MLG side brace assemblies previously inspected [in accordance with] revision 1 of the Messier Dowty SB 631-32-191 and reduces the inspection interval initially proposed in [EASA] AD 2007-0112 in order to maintain the same level of confidence.

* * * * *

The unsafe condition is cracking of the upper arms of the secondary side brace assemblies of the MLG, which could result in collapse of the MLG during takeoff or landing, damage to the airplane, and possible injury to the flightcrew and passengers. You may obtain further information by examining the MCAI in the AD docket.

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 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 our FAA policies. Any such differences are highlighted in a NOTE within the AD.

Costs of Compliance

We estimate that this AD will affect about 31 products of U.S. registry. We also estimate that it will take about 35 work-hours per product to comply with the basic requirements of this AD. The average labor rate is $80 per work-hour. Required parts will cost about $0 per product. Based on these figures, we estimate the cost of this AD to the U.S. operators to be $86,800, or $2,800 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 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 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 Operations office 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 Operations 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:

2008-17-19 ATR--Gie Avions De Transport Regional (Formerly Aerospatiale): Amendment 39-15657. Docket No. FAA-2008-0636; Directorate Identifier 2007-NM-324-AD.

Effective Date

(a) This airworthiness directive (AD) becomes effective November 3, 2008.

Affected ADs

(b) None.

Applicability

(c) This AD applies to ATR Model ATR42-200, -300, and -320 airplanes, certificated in any category; excluding airplanes on which ATR Modification 8463 has been done.

Subject

(d) Air Transport Association (ATA) of America Code 32: Landing gear.

Reason

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

One ATR 42-300 experienced a collapse of the Right (RH) Main Landing Gear (MLG) when taxiing, caused by failure of the side brace assembly. Investigations revealed a crack propagation that occurred from a corrosion pit, in a very high stressed area of the upper arm. Dimensions of the corrosion pit were lower than the minimum defect size that can be detected by usual inspection means used during landing gear overhaul. The superseded EASA (European Aviation Safety Agency) Airworthiness Directive (AD) 2007-0112 was issued to require repetitive inspections on affected high stressed areas on MLG side brace assemblies for crack detection and to replace the affected side brace assembly if any defect was found.

Since the issuance of [EASA] AD 2007-0112, a modification of [the] side brace upper arm has been developed as terminating action. However, production non-conformity of the inspection tool was discovered.

In order to correct the discrepancy of the initial tool, new inspection tool components have been manufactured and the Service Bulletin (SB) Messier Dowty 631-32-191 has been updated to revision 2 accordingly. This directive mandates re-inspection of MLG side brace assemblies previously inspected [in accordance with] revision 1 of the Messier Dowty SB 631-32-191 and reduces the inspection interval initially proposed in [EASA] AD 2007-0112 in order to maintain the same level of confidence.

* * * * *

The unsafe condition is cracking of the upper arms of the secondary side brace assemblies of the MLG, which could result in collapse of the MLG during takeoff or landing, damage to the airplane, and possible injury to the flightcrew and passengers.

--This is a summary of a Federal Register article originally published on the page number listed below--

Final rule.

CFR Part: "14 CFR Part 39"

RIN Number: "RIN 2120-AA64"

Citation: "73 FR 56454"

Document Number: "Docket No. FAA-2008-0636; Directorate Identifier 2007-NM-324-AD; Amendment 39-15657; AD 2008-17-19"

Federal Register Page Number: "56454"

"Rules and Regulations"

Sao Paulo-based GOL Linhas Aereas Inteligentes is the parent company of Brazilian airlines GOL Transportes Aereos and VRG Linhas Aereas.

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Goodrich Corporation operates through its divisions and as a parent company for its subsidiaries, one or more of which may be referred to as "Goodrich Corporation" in this press release.

SOURCE Goodrich Corporation; GR - Electronic Systems

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Quiet Period

In accordance with fair disclosure and corporate governance best practices, GOL will respect a Quiet Period that will start on July 25th, ending immediately after the conference calls on August 12th.

    Conference Calls
    English                             Portuguese
    August 12th, 2008                   August 12th, 2008
    11:00 a.m. US EDT                   12:30 p.m. US EDT
    12:00 p.m. Brasilia Time            01:30 p.m. Brasilia Time
    Phone: +1 (973) 935-8893            Tel.: +55 (11) 2188-0188
    Replay: +1 (706) 645-9291           Replay: +55 (11) 2188-0188
    Code: 54689682                      Code: GOL

Participants are requested to connect ten minutes prior to the time set for the conference calls.

Slides and Webcast: A slide presentation will be available for viewing and downloading on the IR session of our website www.voegol.com.br/ir. The Conference Calls will be live broadcast over the Internet on the same website, remaining available after the event.

Replay: A conference call replay facility will be available from August 12th through August 19th, 2008. In order to access the replay, dial above mentioned numbers.

Speakers:

Constantino de Oliveira Junior -- President and CEO

Anna Cecilia Bettencourt -- Finance and IR Director

SOURCE GOL Linhas Aereas Inteligentes S.A.

http://www.voegol.com.br/ir