According to the Aircraft Electronics Association and the Aircraft Owners and Pilots Association, the Federal Aviation Administrations Advisory Circular (90-100A), released in March, seemed to say that except for specified GPS units, some 26,000 other IFR-approved GPSes were no long eligible to be used in lieu of ADF and DME equipment. That now appears to be a tempest in a teapot. According to a statement by the AEA, the core issue was that wording in the Airmans Information Manual was deleted that specifically allowed the use of IFR- and TSO-approved GPS to substitute for ADF and DME in the IFR system. The FAA has pledged to fix the error and has told the AEA that currently approved IFR GPSes remain viable.
In Case You Missed It
Design Process: Vertical Tail Planform
The size and shape of the planform of the vertical tail determine its ability...
Unusual Attitude
Oshkosh AirVenture gave Ed Wischmeyer the opportunity to look around at the newest ideas in aviation and to think about the larger implications of what he was seeing. He speculates about what works, what doesn't and how manufacturers and consumers alike could make the world of flying a better place.
Boots on the Ground
Paul Dye talks about meeting old friends and making new friends at air shows and fly-ins, and introduces several new columnists who will be regular contributors to KITPLANES.
