FAA Publishes Modified Noise Rules For Tiltrotors | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 03.02.15

Airborne 02.24.15

Airborne 02.25.15

Airborne 02.26.15

Airborne 02.27.15

Airborne Hi-Def On YouTube

Airborne 03.02.15

Airborne 02.24.15

Airborne 02.25.15

Airborne 02.26.15

Airborne 02.27.15

Fri, Jan 11, 2013

FAA Publishes Modified Noise Rules For Tiltrotors

Brings U.S. Regulations Into Agreement With ICAO Standards

The FAA has published a rule in the Federal Register governing noise certification standards for issuing type and airworthiness certificates for a new civil, hybrid airplane-rotorcraft known as the tiltrotor. This noise standard establishes new noise limits and procedures as the basis to ensure consistent aviation noise reduction technology is incorporated in tiltrotors for environmental protection. It provides uniform noise certification standards for tiltrotors certificated in the United States and harmonizes the U.S. regulations with the standards of the International Civil Aviation Organization's (ICAO) Annex 16.

Tiltrotors are defined as aircraft uses rotating nacelles, a hybrid of propellers and helicopter rotors, to provide both lift and propulsive force. The tiltrotor is designed to function as a helicopter for takeoff and landing and as an airplane during the en-route portion of flight operations. The rule cites the V-22 Osprey (pictured) as the most recognizable example of the type.

In anticipation of civil tiltrotor production, ICAO's Committee on Aviation Environmental Protection (CAEP) chartered the Tiltrotor Task Group (TRTG) in 1997 to develop noise certification guidelines for tiltrotors. The FAA participated in the TRTG and its development of the tiltrotor noise guidelines from 1997 to 2000. The ICAO tiltrotor guidelines used the same noise limits that the United States had incorporated into part 36, Appendix H for helicopter noise certification. The ICAO has included additional requirements that are unique to the design of tiltrotors. Current regulations in part 36 do not contain noise certification requirements specific to the tiltrotor and its unique flight capabilities. Since no standards for the tiltrotor currently exist, the FAA is adding new standards to part 36, and amending part 21, § 21.93 (Classification of Changes in Type Design) to accommodate certification of the tiltrotor. In order to harmonize the U.S. regulations with the international standards, this rulemaking adopts the same noise certification standards as used in ICAO Annex 16, Volume 1, Chapter 13, Attachment F (Amendment 7) for tiltrotors.

The FAA received only one comment on the NPRM during the period open for public comments, which closed October 19, 2011. That comment, from AgustaWestland, stated that the proposed rule did not specify the entity that would determine the flyover configuration in Appendix K to Part 36. AgustaWestland recommended that the regulation specify that the applicant be the entity that prescribes the constant flyover aircraft configuration.

The FAA said that it agrees the regulation needs to specify what entity prescribes the constant flyover configuration. The FAA also agreed that the applicant is the proper entity, and modified the final rule to incorporate this change.

The present value cost of the final rule is $588,000 for the certification of one tiltrotor type, about the same as would be required for a traditional helicopter design. The FAA considered this cost to be minimal in the NPRM. The FAA received no comments on this minimal cost determination. Therefore, the FAA considers this cost to be minimal in this final regulatory evaluation.

(Lower image AgustaWestland 609)

FMI: Final Rule

Advertisement

More News

Airborne 02.27.15: CS300 Flies, Nimoy Goes West, NTSB's Hart OK'd, PBOR II

Also: Bell 505 Update, Mooney Update, UAV Hysteria, AAR Sells Telair, True Blue Power, More UAV Waivers, Flyers Rights The Bombardier CSeries CS300 airliner made its first flight t>[...]

Counting Down! ANN's Infamous April 1st Edition's Just Around The Corner!

Get Your Wacky Ideas In NOW! ANN E-I-C Note: Folks... we gotta warn you... based on all the nonsense we've had to endure in 2014-2015 (which we are duty-bound to lampoon), this may>[...]

CHP Selects Becker Digital Audio And Polycon Wireless Intercom

Systems To Be Installed In New Helicopters And Fixed Wing Fleet Becker Avionics has reached an agreement with the California Highway Patrol (CHP) Office of Air Operations, which wi>[...]

ANA Selects Rolls-Royce Trent 1000 Engines For New Aircraft

Latest Order Valued At $130 Million For Dreamliners Rolls-Royce has been selected by All Nippon Airways (ANA) to provide Trent 1000 engines, worth $130 million, to power three addi>[...]

Klyde Morris (03.02.15)

Klyde Fears FAA's Enforcement Objectives... FMI: www.klydemorris.com>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC