Fleet Type: 700
AIPC 21-23-01-20a Item #165
CABIN TEMP IS VERY HOT IN BACK AND VERY COLD IN FRONT. SEEMS TO CHANGE AROUND ROW 13.
Install Overhead duct end cap Part# 930810BC
Pull down the ceiling panels and look for leaks of the air from the distribution duct. You can also check the airflow along the duct and look for loss of airflow. These caps are found on both ends of the distribution ducts.
With the end cap missing or damaged, the air gets spilled in the front of the cabin and does not make it to the aft cabin. The problem could be the opposite in the winter time. “Hot front cabin cold aft.” These caps are flimsy and exand and contract when the pack is on or off.
Thanks to Tom S. for his input !