Contrails From United States of America, joined Oct 2000, 1842 posts, RR: 0 Posted (11 years 4 months 2 weeks 2 days 22 hours ago) and read 1218 times:
I was listening to my scanner late last night (2230-2330) and kept hearing someone calling DCA tower about "low pressure . . . " He seemed to alternate between flying over runway 15 and runway 19. I never could make out all the details.
Was this an FAA plane checking the navigation equipment at DCA? How often is this done? What does "low pressure" refer to?