What was found
AT APPROX 2000 LOCAL TIME, DURING CRUISE FLIGHT, CREW COMPLAINED OF AN ELEC BURNING SMELL. PILOT NOTICED IT SOON AFTERWARD. SHUT OFF A/C, SMELL REMAINED BUT FADED SLIGHTLY. TURNED A/C BACK ON & SMELL GOT MUCH STRONGER. TURNED OFF A/C, OPENED ALL VENTS, MONITORED VOLTAGE & AMPS, LANDED WITHOUT INCIDENT. TROUBLESHOOTING DETERMINED THAT THERE WAS DEBRIS, DIRT & GRASS COMPACTION, IN INLET SCREEN OF THE ALTERNATE AIR DOOR FOR THE AIRCOM FWD BLOWER MOTOR ASSEMBLY. AFTER CLEANING SCREEN FROM DEBRIS, PERFORMED AN OPERATIONAL GND RUN FOR 15 MIN WITH A/C ON HIGH SETTING. NO FURTHER DISCREPANCIES WERE NOTED.