USS Quetzel is being readied for the flight to Quetzel, however, Harry the Rocketman is not sure about the aerodynamics of the shuttle. To resolve the problem, he needs a copy of the Vertibird plans from Shi's databases.
This quest is given to the player instead of the Navarro one if they already recovered plans and gave them to the Shi. In unpatched games, the only way to complete it is to invoke the favor with Badger on the PMV Valdez - gained after rescuing his girlfriend from the hold - and have him hack the mainframe. Badger will provide the plans in three days - and can also retrieve fuel at the same time - but in doing so will incur the wrath of the Shi. Enforcers will appear to kill him a few days later.
In games patched with killap's ultimate patch, the player can instead obtain a copy from the mainframe or the physics workstation at the Steel Palace.