What was found
ON APPROACH, A STRANGE ODOR WAS DETECTED, THE ODOR OCCURRED IN THE CABIN WHEN STARTING THE APU AND PUTTING ON THE AIR CON. THE AIRCRAFT WAS GROUNDED. ACCOMPLISHED CARD 05-96-70, DURING INSPECTION, FOUND THE POWER PORT AT ROW 22FED INOPERATIVE. REPAIRED. NO FURTHER ODOR NOTED IN CABIN.