I would concur with what Iwe007 offered. We manufacture aircraft lighting systems where I work, the vast majority of which are 400 Hz. We have been asked to manufacture a "wild frequency" ballast for fluorescent lighting on one of our customer's ships, from 50 to 480 Hz. We were...
Avio:
Expanding on what DJ1958 said, I would recommend FAA Advisory Circulars AC65.9A and AC65.15A, the airframe & powerplant mechanics General and Airframe handbooks, respectively. There is also a powerplant circular (AC 65.12), if you need that too. These are the books, along with AC43.13...
When the aircraft lifts off, the landing gear squat switch tells the cabin pressure regulator that the aircraft is now airborne, which then causes the outflow valve(s) to "slam" shut, so the cabin pressure rises suddenly. This momentary sudden change (rise) in pressure is cabin bump...
