I never flew a 99 but did fly this one almost 40 years ago but only for a short while.
From the King Air Mag
"To accommodate the 15 passengers, the 99’s fuselage is quite long and the tail needed to be designed to provide enough control and trim authority to handle a much larger CG envelope. Instead of trim tabs on the elevators, Beech went with a movable horizontal stabilizer … like that used on a Piper Cub or Cessna 180, for example. However, unlike the Cub and Skywagon, the stabilizer on the 99- and 100-series was so big that moving the jackscrew manually proved to be too difficult. Instead, a system was designed and certified that included both an electric Main and electric Standby trim motor that operate the stabilizer through a clutch/gearbox arrangement such that if one motor fails the other can still function. When one first flies a 100, it is a bit disconcerting to reach for the elevator trim wheel and find it missing! Normal trimming is accomplished through the use of dual switches on the outboard grip of the pilot’s or co-pilot’s control wheel. Standby trimming is achieved by use of two switches on the pedestal, accessible to both pilots. A trim-in-motion aural tone beeps whenever the stabilizer moves. That, too, is unusual at first but soon becomes expected and almost unnoticed."
My B100 training manual is at the airport but I did find this online.
View attachment 147156
If I remember right on step #3,4, and 5 the switches are on the center pedestal.
www.nbcmiami.com
