a decrease in cabin temperature.
Cabin temperature mode selector switch - AUTO.
Cabin temperature control rheostat - Rotate to full INCR position. Observe an increase in cabin
Air conditioning will come on if cabin temperature is above 60
Air conditioning cold operation - Check as follows:
Verify that the COLD OPN annunciator light is illuminated only when the FAT is below 45°F.
Cabin temperature mode selector - COLD OPN. Check that air conditioner turns on in 8 to 12
Verify that air conditioner operation is the same as the AUTO mode except that the air conditioner
operates continuously above 63% N1.
11. Pressurization system - Check as required (Section IV).
* 12. Carbon monoxide - Check the cockpit and cabin for the presence of carbon monoxide. Maximum carbon
monoxide allowable is 0. 005%.