Challenger 600 Series: Troubleshooting Warm Cabin Air Temperature

August 2025

As spring and summer temperatures begin to rise, so do the number of environmental system squawks. The discomfort of passengers and crew becomes more evident with an increase in temperature and a noticeable reduction in airflow.  

The most efficient way to determine the cause of this squawk is to have an Authorized Challenger MRO, like Duncan Aviation, take measurements of the environmental system by measuring the cabin air performance (temperature and airflow) at different points throughout the system. This evaluation will direct an experienced technician to the area of the system most likely to be the cause of cabin discomfort.

Advantages of Environmental System Evaluation

1. Economic Savings: Without the system evaluation, determining the cause is somewhat of a guessing game, and the cooling turbine is usually the first unit to be changed. Randomly changing parts and components because the ductwork feels warm or the air flow from an aft cabin WEMAC seems low is expensive and can result in added expenses due to changing parts, and the squawk is still not settled.
2. Downtime Savings: The environment system evaluation can be performed on the road at any location with little interruption to your busy flight schedule. In fact, flying can continue immediately after the evaluation has been performed. The impending results remove the guesswork from the equation and establish a recommended maintenance plan.

Duncan Aviation Recommendation

Take advantage of the next time your Challenger 600 series aircraft is scheduled in for necessary inspections. The maintenance for this squawk can be easily performed while the interior is removed for other services.

Have your system tested and fixed before your passengers or crew begin to complain about uncomfortable cabin temperatures.

To schedule your next Challenger maintenance event and Environmental Systems Evaluation, contact your Duncan Aviation Challenger Airframe Service Sales Rep.