Cast-offs.

This is coolbert:

From a comment to the blog:

Steiner said...

"The Filipinos can't pony up a few hundred thousand dollars to buy themselves three thirty or forty year old King Airs? How are they going pay for the radars, or will they wait for some thirty year old cast offs to match the airframes?"

See previous blog entries the topic military hardware as recently donated to the Filipino:

http://militaryanalysis.blogspot.com/2015/07/arms-race.html

http://militaryanalysis.blogspot.com/2013/08/p400.html

http://militaryanalysis.blogspot.com/2013/08/this-is-coolbert-from-various-sources.html

And Steiner is correct. If that assumption proves to be accurate and those TC-90 are merely airframes you have empty shells without purpose other than for utility value or VIP transport.

NOT to mention additional EW [electronic warfare] "suites" that are compatible with the aircraft and can be installed on demand. Task tailored as is necessary.

And as to the training of personnel to operate "systems" of what ever type that is another story.

coolbert.