Final answer:
The MD80 aircraft at Allegiant is secured with chocks when parked. One set per main landing gear is common, but the exact number can vary according to the airline's policy or airport regulations.
Step-by-step explanation:
At Allegiant, the MD80 when parked will be secured with a specific number of sets of chocks. Wheel chocks are used to prevent the aircraft from moving while parked and are placed snugly against the tire's tread.
Although the number of chock sets may vary by airline policy or airport regulations, generally, it is common to use at least one set per main landing gear for commercial aircraft. It is important for ground support personnel to follow the standard operating procedures of their airline for securing an MD80 or any other aircraft with chocks to maintain safety on the ramp.