Inside an Airliner's Engine Shop

This Pratt & Whitney PW4090 powers United's Boeing 777 aircraft. It can offer up to 91,790 pounds of thrust.

The Pratt & Whitney PW4000-94 powers Boeing 747-400 and 767-200/300 models. It produces between 52,000 and 62,000 pounds of thrust.

The 777 engines are some of the largest commercial jet engines around. Each 777 airliner uses two PW4090s.

The exhaust case on the left is $200,000, but the low-pressure turbine module on the right is $2 million.

If you still have cash to spend you could pick up this high-pressure compressor rotor module for $250,000. When put together, a complete 777 engine costs $10 million to $12 million and a 747 engine

Here you can gauge the immense scale of a 747-400. We're under the starboard wing just behind two of the PW4000-94 engines. They look even bigger in their cowlings.

United also displayed various engine parts with their respective price tags. It wasn't a cheap date by any means. For example, this high-pressure compressor module costs only $3.5 million.

If you were up to it, you could join a group and pull an Airbus A320 across the tarmac. The aircraft weighs only 94,000 pounds, or 42,600 kilograms

This low-pressure compressor module is just $1 million.

You'll need a bit more for this high-pressure turbine module. It's worth $2.4 million.

The Pratt & Whitney PW4000-94 powers Boeing 747-400 and 767-200/300 models. It produces between 52,000 and 62,000 pounds of thrust.

The Blue Angels aircraft parked on the edge of the maintenance facility before they departed for one of their San Francisco Fleet Week air shows.