On a service call tonight on a 30 year old or older two story privately owned apartment complex that reminded me of a motel 6. I believe the blower motor or cap is bad. I could not locate the air handler. The apartment is on the second story with a flat roof and no attic. The ceiling was all shot with popcorn and no visible access panels inside or on the roof. I looked in all the closets, rooms, roof, bathroom, kitchen, bedrooms. I opened the return grill in the hallway, center of all the rooms. the grill was at the bottom of a small drop ceiling and when I poked my head in took a look inside I could see some metal duct running to the rooms the bottom side of the roof and no air handler. Does any one have a idea? Is there a chance the ceiling will need to be cut to access the air handler? What am I missing?