Butler National Corporation has received FAA Supplemental Type Certificate (STC) approval for the replacement of a standby altimeter and separate standby attitude indicator in Learjets.
The STC authorizes the replacement of the 2-inch standby altimeters or 2-inch standby attitude indicators installed in most legacy Learjets, including model 24, 24B/D/E/F, 25, 25B/C/D/F, 28, 29, 31, 31A, 35, 35A, C21A, 36, 36A, 55, 55B, 55C, and 60.
The new installation package replaces the previously-installed standby equipment with the Mid-Continent Instruments and Avionics MD23 2-inch Digital Counter Drum Encoding Altimeter and Attitude Indicator.
“Our avionics technicians have noticed a growing number of operating challenges with existing RVSM standby altimeters when performing the required continued airworthiness checks,” said Christopher Reedy, president and CEO of Butler National Corporation. “The replacement standby altimeter is a quality and cost-effective replacement solution that provides the RVSM standby functionality. Similarly, the MD23 2-inch Digital Attitude Indicator provides a great looking LCD-display replacement for the aging mechanical standby attitude indicator.”
For more information: MCICo.com, ButlerNational.com