04-25034. Airworthiness Directives; Gulfstream Aerospace LP Model Galaxy and Gulfstream 200 Airplanes

AGENCY:

Federal Aviation Administration (FAA), DOT.

ACTION:

Notice of proposed rulemaking (NPRM).

SUMMARY:

The FAA proposes to adopt a new airworthiness directive (AD) for certain Gulfstream Aerospace LP Model Galaxy and Gulfstream 200 airplanes. This proposed AD would require repetitive inspections for damage of the flexible supply lines of the pilot and copilot oxygen mask boxes, and eventual replacement of the lines with new rigid tubes. This proposed AD is prompted by a report of an oxygen leak in the cockpit mask box. We are proposing this AD to prevent a broken oxygen supply line, which could result in oxygen being unavailable to the flightcrew.

DATES:

We must receive comments on this proposed AD by December 10, 2004.

ADDRESSES:

Use one of the following addresses to submit comments on this proposed AD.

• DOT Docket Web site: Go to http://dms.dot.gov and follow the instructions for sending your comments electronically.
• Government-wide rulemaking Web site: Go to http://www.regulations.gov and follow the instructions for sending your comments electronically.
• Mail: Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., Nassif Building, room PL-401, Washington, DC 20590.

By fax: [phone].

• 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.

For service information identified in this proposed AD, contact Gulfstream Aerospace Corporation, PO Box 2206, Mail Station D-25, Savannah, Georgia 31402.

You can examine the contents of this AD docket on the Internet at http://dms.dot.gov,, or in person at the Docket Management Facility, U.S. Department of Transportation, 400 Seventh Street SW., room PL-401, on the plaza level of the Nassif Building, Washington, DC.

FOR FURTHER INFORMATION CONTACT:

Technical information: Dan Rodina, Aerospace Engineer, International Branch, ANM-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone [phone]; fax [phone].

Plain language information: Marcia Walters, [e-mail].

SUPPLEMENTARY INFORMATION:

Docket Management System (DMS)

The FAA has implemented new procedures for maintaining AD dockets electronically. As of May 17, 2004, new AD actions are posted on DMS and assigned a docket number. We track each action and assign a corresponding directorate identifier. The DMS AD docket number is in the form “Docket No. FAA-2004-99999.” The Transport Airplane Directorate identifier is in the form “Directorate Identifier 2004-NM-999-AD.” Each DMS AD docket also lists the directorate identifier (“Old Docket Number”) as a cross-reference for searching purposes.

Comments Invited

We invite you to submit any relevant written data, views, or arguments regarding this proposed AD. Send your comments to an address listed under ADDRESSES. Include “Docket No. FAA-2004-19564; Directorate Identifier 2004-NM-103-AD” at the beginning of your comments. We specifically invite comments on the overall regulatory, economic, environmental, and energy aspects of the proposed AD. We will consider all comments submitted by the closing date and may amend the proposed AD in light 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 with FAA personnel concerning this proposed AD. Using the search function of our docket website, anyone can find and read the comments in any of our dockets, including the name of the individual who sent the comment (or signed the comment on behalf of an association, business, labor union, etc.). You can review the DOT's complete Privacy Act Statement in the Federal Register published on April 11, 2000 (65 FR 19477-78), or you can visit http://dms.dot.gov.

We are reviewing the writing style we currently use in regulatory documents. We are interested in your comments on whether the style of this document is clear, and your suggestions to improve the clarity of our communications that affect you. You can get more information about plain language at http://www.faa.gov/​language and http://www.plainlanguage.gov.

Examining the Docket

You can examine the AD docket on the Internet at http://dms.dot.gov,, or in person at the Docket Management Facility office between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays. The Docket Management Facility office (telephone [phone]) is located on the plaza level of the Nassif Building at the DOT street address stated in the ADDRESSES section. Comments will be available in the AD docket shortly after the DMS receives them.

Discussion

The Civil Aviation Administration of Israel (CAAI), which is the airworthiness authority for Israel, notified us that an unsafe condition may exist on certain Gulfstream Aerospace LP Model Galaxy and Gulfstream 200 airplanes. The CAAI advises that several operators have reported loss of oxygen system pressure caused by the separation of the flexible supply lines of the flightcrew oxygen mask boxes. If this condition is not corrected, oxygen could be unavailable to the flightcrew.

Relevant Service Information

Gulfstream has issued Alert Service Bulletin 200-35A-202, Revision 1, dated August 27, 2003. The service bulletin describes procedures for:

• Repetitive inspections for damage of the flexible supply lines of the pilot and copilot oxygen mask boxes;
• Replacement of any damaged line either with a new or serviceable flexible hose that has the same part number, or with a new rigid tube; and
• Eventual replacement of the flexible supply lines with new rigid tubes, which would eliminate the need for the repetitive inspections.

Accomplishing the actions specified in the service information is intended to adequately address the unsafe condition. The CAAI mandated the service information and issued Israeli airworthiness directive 35-03-07-12, dated July 21, 2003, to ensure the continued airworthiness of these airplanes in Israel.

FAA's Determination and Requirements of the Proposed AD

These airplane models are manufactured in Israel and are type certificated for operation in the United States under the provisions of section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and the applicable bilateral airworthiness agreement. Pursuant to this bilateral airworthiness agreement, the CAAI has kept the FAA informed of the situation described above. We have examined the CAAI's findings, evaluated all pertinent information, and determined that we need to issue an AD for products of this type design that are certificated for operation in the United States.

Therefore, we are proposing this AD, which would require accomplishing the actions specified in the service information described previously, except as discussed below.

Differences Between the Proposed AD and the Service Information/Israeli Airworthiness Directive

This proposed AD and the service bulletin specify repetitive inspections and eventual replacement of the supply lines. The CAAI, however, has mandated only the replacement. We find it necessary to require the interim repetitive inspections to ensure the safety of the fleet until the replacement can be completed.

Although the service bulletin specifies completing a service reply card, this proposed AD would not require that action.

The service bulletin specifies a “visual inspection” of the supply lines. We have determined that this inspection should be considered a “general visual inspection,” which is defined in Note 1 of this proposed AD.

Costs of Compliance

The following table provides the estimated costs for U.S. operators to comply with this proposed AD.

Estimated Costs

Action	Work hours	Average labor rate per hour	Parts	Cost per airplane	Number of U.S.-registered airplanes	Fleet cost
Inspection, per cycle	8	$65	None required	$520	63	$32,760
Replacement	10	65	0	650	63	40,950

Regulatory Findings

We have 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 that the 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. See the ADDRESSES section for a location to examine the regulatory evaluation.

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 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

[Amended]

2. The FAA amends § 39.13 by adding the following new airworthiness directive (AD):

Gulfstream Aerospace LP (Formerly Israel Aircraft Industries, Ltd.): Docket No. FAA-2004-19564; Directorate Identifier 2004-NM-103-AD.

Comments Due Date

(a) The Federal Aviation Administration must receive comments on this AD action by December 10, 2004.

Affected ADs

(b) None.

Applicability

(c) This AD applies to Model Galaxy and Gulfstream 200 airplanes, certificated in any category, serial numbers 004 through 084 inclusive.

Unsafe Condition

(d) This AD was prompted by a report of an oxygen leak in the cockpit mask box. We are issuing this AD to prevent a broken oxygen supply line, which could result in oxygen being unavailable to the flightcrew.

Compliance

(e) You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.

Inspection

(f) Within 50 flight hours after the effective date of this AD, perform a general visual inspection for damage of the flexible supply lines of the pilot and copilot oxygen mask boxes. Use the Accomplishment Instructions of Gulfstream Alert Service Bulletin 200-35A-202, Revision 1, dated August 27, 2003, to do the inspection. If any damage is found, perform corrective actions before further flight in accordance with the service bulletin. All replacement parts must be new or serviceable. Repeat the inspection thereafter at intervals not to exceed 50 flight hours until the replacement required by paragraph (g) of this AD has been done.

Note 1:

For the purposes of this AD, a general visual inspection is: “A visual examination of an interior or exterior area, installation, or assembly to detect obvious damage, failure, or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normally available lighting conditions such as daylight, hangar lighting, flashlight, or droplight and may require removal or opening of access panels or doors. Stands, ladders, or platforms may be required to gain proximity to the area being checked.”

Replacement

(g) Within 300 flight hours after the effective date of this AD, replace the flexible supply lines with new rigid tubes, in accordance with the Accomplishment Instructions of Gulfstream Alert Service Bulletin 200-35A-202, Revision 1, dated August 27, 2003. This replacement terminates the repetitive inspection requirement of paragraph (f) of this AD.

Alternative Methods of Compliance (AMOCs)

(h) The Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, has the authority to approve AMOCs for this AD, if requested in accordance with the procedures found in 14 CFR 39.19.

Related Information

(i) Israeli airworthiness directive 35-03-07-12, dated July 21, 2003, also addresses the subject of this AD.

Issued in Renton, Washington, on November 1, 2004.

Kalene C. Yanamura,

Acting Manager, Transport Airplane Directorate, Aircraft Certification Service.