Don’t Fall into the Five-second Trap

 - September 15, 2006, 5:50 AM

In a proposed Airworthiness Directive, the FAA says certain Honeywell mode-S transponders erroneously go into standby mode if the crew takes longer than five seconds to change codes when using the rotary knob of the radio management unit. The AD would require modifying or replacing transponders on certain com units.