Cessna Citation Mustang (C510)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 50; Flight Crew Total 1850; Flight Crew Type 650
Aircraft Equipment Problem Less Severe
Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
Immediately after departure passenger reported rear cabin was excessively hot. Simultaneously 'Duct O'Heat R' amber caution message appeared on MFD and pilot sensed an abnormal smell. As per emergency procedures manual; the air source was switched to L. Pilot requested ATC for return to departure airport which was immediately authorized. Subsequent investigation identified a cracked pre-cooler in the right engine as the source of the hot air and was slated for immediate service and repair.
A Cessna Citation pilot described an excessively hot cabin along with a duct overheat warning that resulted in a return to the departure airport. Subsequent inspection revealed a cracked pre-cooler.