Charging Power in Your Learjet Cockpit New USB-Charger Clock!


We at Butler Avionics understand the new need for powering portable electronic devices (PEDs) in your cockpit with the latest technology is essential for maintaining flight standards. We proudly offer the FAA-approved STC (Supplemental Type Certificate) No. ST00235MC to install the Mid-Continent CH93 Chronos Digital Clock with a USB Charger part 25. This STC includes Learjet models 24, 25, 31/31A, 35, 36, 55, and 60 series.

Why Upgrade to the CH93 Chronos Digital Clock with charger?

Versatile USB Charging Options

One of the features of the CH93 Chronos Digital Clock is its built-in USB charging ports. The clock has multiple configurations, including USB-A, USB-C, and dual USB-A/C options. This allows your cockpit to accommodate various devices, from tablets and smartphones to other essential electronics, keeping them charged and ready for use.

Comprehensive Timing Functions

The CH93 Chronos Digital Clock offers a variety of timer functions for flight operations:

– Local Time

– Universal Time

– Flight Timer

– Elapsed Timer

– Countdown Timer

Cost-Effective Installation

One of the advantages of the CH93 Chronos Digital Clock is its straightforward installation process. It is designed to replace existing cockpit clocks with the same form and fit (new circuit board), making the upgrade budget-friendly while minimizing aircraft downtime.

Complete Installation Package

At Butler Avionics, we provide everything you need for installation in one complete Kit. This includes all necessary STC documentation so that your upgrade is compliant and ready for operation.

Get In Touch

For more information about our STC No. ST00235MC, and to discuss how it can benefit your Learjet, don’t hesitate to get in touch with us:

– Phone: +1 (913) 829-4606

– Email:


The CH93 Chronos Digital Clock is an excellent enhancement for any Learjet operator looking to improve cockpit functionality and convenience. With its versatile USB charging options and timer functions, this clock is a smart investment in your aircraft.

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