I'm doing research on a case involving United Airlines trying to build a new hangar at Newark International Airport, and being extorted by the chairman of the Port Authority. He demanded an unprofitable, bi-weekly custom flight route in exchange for his approval.
As a small but important detail of my research, I'm trying to determine how much an airline can save by building a new hangar at a major airport.
I believe the primary benefit of a new hangar is the ability to do repairs and maintenance locally, instead of having to fly the plane elsewhere to do it. Is this true?
What expenses, roughly speaking, does a new hangar of this sort save a major airline each year (or longer period)? Sources would be appreciated. So far I've only found information on the benefits to private plane owners in using or renting hangars.