Robert C. Mentzer, Jr.Principal Consultant
Robert specializes in airport environmental noise analysis, and manages HMMH’s aviation software products RealCountors and InFLIGHT from just outside Orlando, FL.…
On June 25th 2015, the National Business Aviation Association (NBAA) released an update to its recommended Noise Abatement Program (NAP). Details of their announcement can be found here. This was a complete repackaging of their program and related materials many of which have been in place for decades. HMMH worked with NBAA to evaluate the noise footprints generated by the prior and updated procedures with several in-use business jet types. HMMH also assisted NBAA with the development of language to describe and identify how these changes may affect airports.
NBAA’s updated Noise Abatement Program was developed with modern aircraft performance and air traffic control (ATC) requirements in mind. With this revision, NBAA continues to provide operators with guidance to reduce noise impacts that is suited to the current operating environment, as well as new tools for aircraft operators and airports to address the noise concerns of adjacent communities.
The updated program includes:
The revised NAP retains the recommendations for the existing standard departure procedure, but includes a new option for high-density airports. The high-traffic option – which allows for a shorter thrust cutback area – may allow the procedure to be used at busy airports where it was not feasible before. The new guidelines do not include the former “close-in” departure procedure, which was found to have no significant impact on noise reduction for today’s Stage 3 and 4 aircraft, which climb so fast that they reduce power while over airport property, reducing the benefit to communities outside the airport boundary.
Since the former “close-in” departure procedure has been eliminated and several airports recommend NBAA procedures, NBAA included the following page on their site to assist Airport operators understand the changes to the NAP: