### 54791 Federal Register / Vol. 78, No. 173 / Friday, September 6, 2013 / Proposed Rules

telephone (202) 267–9688; email Ida.Klepper@faa.gov.

**SUPPLEMENTARY INFORMATION :**  See the ‘‘Additional Information’’ section for information on how to comment on this proposal and how the FAA will handle comments received. The ‘‘Additional Information’’ section also contains related information about the docket. In addition, there is information on obtaining copies of related rulemaking documents.
Background

On June 11, 2013, the FAA issued Notice No. 1209, entitled ‘‘Revisions to Operational Requirements for the Use of Enhanced Flight Vision Systems (EFVS) and to Pilot Compartment View Requirements for Vision Systems’’ (78 FR 34935). Comments to that document were to be received on or before September 9, 2013.

Dassault-Aviation submitted an electronic request for an extension of the comment period from September 9, 2013 to October 15, 2013. The petitioner requested this extension to allow adequate time to evaluate and prepare comments for the NPRM and two draft Advisory Circulars (ACs) which are directly related to the NPRM. On August 13, 2013, the FAA published a Notice of Availability (78 FR 49318) making draft AC 90–106A, Enhanced Flight Vision Systems, and draft AC 20–167A, Airworthiness Approval of Enhanced Vision System, Synthetic Vision System, Combined Vision System, and Enhanced Flight Vision System Equipment, available for public comment. The comment period for both ACs closes on October 15, 2013. The petitioner asserted that comments to the NPRM should be linked with comments to both draft ACs, and that the comment period for the NPRM should therefore be extended to October 15, 2013 to match the comment period closing date for the draft ACs. The petitioner further asserted that doing so would provide them with adequate additional time to evaluate and provide comments for all three documents. The FAA agrees with the petitioner’s position and is granting an extension of the comment period to October 15, 2013.

Extension of Comment Period

In accordance with § 11.47(c) of title 14, Code of Federal Regulations, the FAA has reviewed the petition made by Dassault-Aviation for extension of the comment period to the NPRM. This petitioner has shown a substantive interest in the proposed rule and good cause for the extension. The FAA has determined that extension of the comment period is consistent with the public interest, and that good cause exists for taking this action.

Accordingly, the comment period for the NPRM Notice No. 1209 is extended until October 15, 2013.

Additional Information

A. Comments Invited

The FAA invites interested persons to participate in this rulemaking by submitting written comments, data, or views. The agency also invites comments relating to the economic, environmental, energy, or federalism impacts that might result from adopting the proposals in this document. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. To ensure the docket does not contain duplicate comments, commenters should send only one copy of written comments, or if comments are filed electronically, commenters should submit only one time.

The FAA will file in the docket all comments it receives, as well as a report summarizing each substantive public contact with FAA personnel concerning this proposed rulemaking. Before acting on this proposal, the FAA will consider all comments it receives on or before the closing date for comments. The FAA will consider comments filed after the comment period has closed if it is possible to do so without incurring expense or delay. The agency may change this proposal in light of the
comments it receives.
B. Availability of Rulemaking
Documents

An electronic copy of rulemaking documents may be obtained from the Internet by—

1. Searching the Federal eRulemaking Portal (http://www.regulations.gov ); 2. Visiting the FAA’s Regulations and Policies Web page at http:// www.faa.gov/regulations

_ policies or 3. Accessing the Government Printing Office’s Web page at http:// www.gpo.gov/fdsys/.

Copies may also be obtained by sending a request to the Federal Aviation Administration, Office of Rulemaking, ARM–1, 800 Independence Avenue SW., Washington, DC 20591, or by calling (202) 267–9680. Commenters must identify the docket or notice number of this rulemaking.

All documents the FAA considered in developing this proposed rule, including economic analyses and technical reports, may be accessed from the Internet through the Federal eRulemaking Portal referenced in item (1) above. Issued in Washington, DC, on September 3,

2013. Lirio Liu, Director, Office of Rulemaking.

[FR Doc. 2013–21698 Filed 9–5–13; 8:45 am]

**BILLING CODE 4910–13–P**

**DEPARTMENT OF TRANSPORTATION**

**Federal Aviation Administration**

**14 CFR Part 21**

**Proposed Additional Airworthiness Design Standards: Advanced Avionics**  **Under the Special Class (JAR–VLA) Regulations; Aquila Aviation by**  **Excellence GmbH, Model AT01–100.**

**AGENCY :**  Federal Aviation Administration (FAA), DOT.

**ACTION :**  Request for comments.

**SUMMARY :**  This document announces the issuance of the design criteria for the inclusion of advance avionics with intergrated electronic displays for the Aquila Aviation by Excellence GmbH AT01–100. These additional provisions are expansions of the existing JAR–VLA (Joint Aviation Requirements-Very Light Aircraft) and CS–VLA regulations as the current regulations do not adequetely address these types of systems. The current regulations only address traditional federated gauges. The European Aviation Safety Agency (EASA) has not expanded the VLA regulations for these types of installation on these types of airplanes through EASA special conditions or new regulations. These Federal Aviation Administration (FAA) design criteria are being proposed to help initiate standards for this type of airplane without being overburdensome and to encourage EASA to follow suit.

**DATES :**  Comments must be received on or before October 7, 2013.

**ADDRESSES :**  Send all comments to the Federal Aviation Administration (FAA), Standards Office, Small Airplane Directorate (ACE–112), Aircraft Certification Service, 901 Locust Street, Room 301, Kansas City, MO 64106.

**FOR FURTHER INFORMATION CONTACT :**  Mr. Doug Rudolph, Aerospace Engineer, Standards Office (ACE–112), Small Airplane Directorate, Aircraft Certification Service, FAA; telephone number (816) 329–4059, fax number (816) 329–4090, email at doug.rudolph@ faa.gov.

**SUPPLEMENTARY INFORMATION :**  Any person may obtain a copy of this information by contacting the person named above under **FOR FURTHER**

**INFORMATION CONTACT**

.


### 54792 Federal Register / Vol. 78, No. 173 / Friday, September 6, 2013 / Proposed Rules

Background

The original certification of the aircraft was done under the provisions of 14 CFR 21.29, as a § 21.17(b), special class aircraft, JAR–VLA, using the requirements of JAR–VLA Amendment VLA/92/01 as developed by the Joint Aviation Authority, and under Title 14 of the Code of Federal Regulations and two additional design criteria issued on September 2, 2003 (68 FR 56809).

The regulation applicable to the Amended Type Certificate (TC) approval is § 21.17(b). This section describes the regulatory basis for the approval of JAR–VLA and CS–VLA aircraft as a special class. Policy on this subject includes AC 23–11B and AC

21.17–3.

FAA policy expressed in AC 23–11B and AC 21.17–3 limits JAR–VLA and CS–VLA aircraft approved under § 21.17(b), to Day-VFR operations. Additionally, the FAA also published design criteria to allow expansion of the Aquila AT01–100 airplane to include Night-VFR as shown in NPRM 75 FR 32576. In conjunction with the expansion to Night-VFR operations intergrated avionic displays are to be installed on the Aquila AT01–100 airplane.

EASA allowed the applicant to comply with CS–23 regulations for the intergrated avionic displays installed on the Aquila AT01–100 airplane and made them part of the EASA certification basis, but did not publish these additional requirements as SpecialConditions as they did for the NightVFR expansion. The FAA’s system does not allow this type of additional requirements, such as 14 CFR part 23 regulations, to be added to a special class, § 21.17(b) airplane without being publically noticed either through design criteria or expansion of the existing AC 23–11B. This is the reason for this design criteria noticification.

The FAA has concluded that it is acceptable to allow advanced intergrated avionic systems for certification on the Aquila Model AT01–100 under the special class amended TC project AT00651CE–A, provided the applicant complies with the below listed design criteria based on existing part 23 regulations at the described amendment levels. Revisions to AC 23–11B and AC 21.17–3 will be made to address future airplanes that wish to allow these installations.

To satisfy the additional required design criteria for the Special Class (JAR–VLA) Regulations of § 21.17(b), Aquila Aviation by Excellence GmbH has agreed with the FAA to use the 14 CFR part 23 regulations for their Model AT01–100, as shown on the FAA G–1 Issue Paper. The applicable criteria for the installation of advanced avionic displays on the Aquila AT01–100 are as follows: 14 CFR 23.867 at amendment 23–49,

‘‘Electrical bonding and protection against lightning and static electricity’’ 14 CFR 23.1307 at amendment 23–49,

‘‘Miscellaneous Equipment’’ 14 CFR 23.1311 at amendment 23–62,

‘‘Electronic Display Instrument Systems’’ 14 CFR 23.1321 at amendment 23–49,

‘‘Arrangement and visibility’’ 14 CFR 23.1359 at amendment 23–49,

‘‘Electrical System Fire Protection’’. In addition to the above five regulations that will be used for design criteria, the FAA has also developed a methods of compliance (MOC) issue paper for VLA– 1309 for this type of installation.

Comments Invited

We invite interested parties to submit comments on the proposed airworthiness standards to the address specified above. Commenters must identify the Aquila Model AT01–100 and submit comments to the address specified above. The FAA will consider all communications received on or before the closing date before issuing the final acceptance. The proposed airworthiness design standards and comments received may be inspected at the FAA, Small Airplane Directorate, Aircraft Certification Service, Standards Office (ACE–110), 901 Locust Street, Room 301, Kansas City, MO 64106, between the hours of 7:30 a.m. and 4:00 p.m. weekdays, except Federal holidays.

Issued in Kansas City, Missouri on August
5, 2013. Earl Lawrence, Manager, Small Airplane Directorate, Aircraft Certification Service.

[FR Doc. 2013–20150 Filed 9–5–13; 8:45 am]

**BILLING CODE 4910–13–P**

**DEPARTMENT OF TRANSPORTATION**

**Federal Aviation Administration**

**14 CFR Part 39**

**[Docket No. FAA–2013–0770; Directorate Identifier 2011–SW–057–AD]** 

**RIN 2120–AA64**

**Airworthiness Directives; Eurocopter France (Eurocopter) Helicopters** 

**AGENCY :**  Federal Aviation Administration (FAA), DOT.

**ACTION :**  Notice of proposed rulemaking (NPRM). **SUMMARY :**  We propose to adopt a new airworthiness directive (AD) for certain Eurocopter Model EC225 LP helicopters. This proposed AD would add a new operating limitation that would require increasing the minimum density altitude flight limitation for helicopters without certain Eurocopter modifications installed. This proposed AD is prompted by a report that flights below a certain density altitude create oscillations in the main rotor which can transfer dynamic loads to the structure, the main gearbox (MGB), and the main servo-control inputs, which could result in subsequent loss of control of the helicopter.

**DATES :**  We must receive comments on this proposed AD by November 5, 2013.

**ADDRESSES :**  You may send comments by any of the following methods:

• Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your comments electronically.

• Fax: 202–493–2251.

• Mail: Send comments to the U.S. Department of Transportation, Docket Operations, M–30, West Building Ground Floor, Room W12–140, 1200 New Jersey Avenue SE., Washington,
DC 20590–0001.

• Hand Delivery: Deliver to the ‘‘Mail’’ address between 9 a.m. and 5 p.m., Monday through Friday, except Federal holidays.
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 this proposed AD, the foreign authority’s AD, the economic 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.

For service information identified in this proposed AD, contact American Eurocopter Corporation, 2701 N. Forum Drive, Grand Prairie, TX 75052; telephone (972) 641–0000 or (800) 232– 0323; fax (972) 641–3775; or at http:// www.eurocopter.com/techpub. You may review the referenced service information at the FAA, Office of the Regional Counsel, Southwest Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.

**FOR FURTHER INFORMATION CONTACT :**  Gary Roach, Aviation Safety Engineer, Regulations and Policy Group, Rotorcraft Directorate, FAA, 2601