At approximately 1020 hours on 1/30/10, LAFD Engine 103 & Rescue 102 "C" shift were dispatched to 3920 18th Street West for difficulty breathing. Upon arrival, Engine 103 discovered a 6 year old child not breathing. Engine 103 notified Lee Control they had a respiratory arrest, and requested Battalion 100, MEDSTAR and Truck 104 to set up a landing zone. While LAFD paramedics worked feverishly to revive the child, Truck 104 arrived and had approximately 1 minute to establish a landing zone for MEDSTAR. The l/z was established in the intersection in front of the residence and MEDSTAR 2 arrived almost immediately. The MEDSTAR crew made a quick assessment of the patient, and with LAFD paramedic Debow assisting with ventilations, the child was placed into MEDSTAR 2 and transported still in respiratory arrest to Health Park Hospital.