June 16 (UPI) -- The United Launch Alliance liftoff planned for Monday with dozens of new satellites to join Amazon's "Project Kuiper" mission was delayed due to engineering issues.

The project is part of Amazon's effort to expand global Internet access.

Amazon's second attempted Kuiper 2 launch of 27 additional satellites into low-Earth orbit on top ULA's 205-foot tall Atlas V rocket was delayed shortly before 1 p.m. EDT due to an "engineering observation of an elevated purge temperature within the booster engine," according to ULA officials.

It originally was scheduled to launch during a 30-minute time window starting at 1:25 p.m. EDT from Cape Canaveral Space Force Station in Florida on Space Launch Complex 41. The mission is an effort to boost Amazon's growing satellite constellation to a total of 54 launched out of the mandated 1,600 in about a year's time as part of a federal agreement.

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